{
  "name": "Low-voltage fuse cross-reference by UL class and manufacturer",
  "description": "Which fuse catalog series from each major manufacturer (Edison, Brush/Dorman, Bussmann, Mersen/Gould, GEC/CEFCO, Littelfuse) is the interchangeable equivalent for a given UL fuse class (CC, RK1, RK5, J, T, L, Midget, ceramic/glass supplementals). One record is one fuse type/class/voltage combination, with each manufacturer's series designation printed against it, plus the amp rating that must be added to complete the catalog number. Answers 'what is the Bussmann equivalent of a Littelfuse KLKR fuse', 'I have an old panel fused with Gould A2D fuses, what do I replace them with', 'what class is an FRN-R fuse'. There is no federal or UL-published cross-reference; each manufacturer prints only its own outbound mapping (its series vs everyone else's), never a neutral grid, and distributor sites that do publish one (Bussmann's own cross-reference tool, Mersen's own page) still favour their own house brand and are JS-driven lookup tools rather than a static table a reader or an assistant can scan in one place.",
  "url": "https://referencesource.org/fuse-cross-reference-by-manufacturer-class/",
  "licence": "Facts extracted from a distributor's published cross-reference catalog (a factual compilation of manufacturer part-number equivalences), with a short attributed quote and a link back. Part-number cross-references are facts, not creative expression.",
  "last_verified": "2026-08-31",
  "stale_after": "2028-08-30",
  "sources": [
    "https://cdn.automationdirect.com/static/specs/efusexref.pdf",
    "https://cdn.automationdirect.com/static/specs/efuserk1.pdf"
  ],
  "records": [
    {
      "fuse_class": "1/4\u201dx1/4\u201d Ceramic",
      "operating_style": "Fast-Acting",
      "voltage_rating": "250/125",
      "edison_series": "ABC",
      "brush_dorman_series": "ABC",
      "bussmann_series": "ABC",
      "mersen_gould_series": "GAB",
      "littelfuse_series": "314",
      "id": "abc-250-125-fast-acting-1-4-x1-4-ceramic",
      "url": "https://referencesource.org/fuse-cross-reference-by-manufacturer-class/abc-250-125-fast-acting-1-4-x1-4-ceramic/",
      "source": "https://cdn.automationdirect.com/static/specs/efusexref.pdf",
      "source_quote": "1/4\u201dx1/4\u201d 250/125 ABC ABC ABC GAB \u2013 314 Ceramic Fast-Acting",
      "verified_fields": [
        "brush_dorman_series",
        "bussmann_series",
        "edison_series",
        "littelfuse_series",
        "mersen_gould_series",
        "voltage_rating"
      ],
      "derived_fields": [
        "fuse_class",
        "operating_style"
      ]
    },
    {
      "fuse_class": "1/4\u201dx1/4\u201dGlass",
      "operating_style": "Fast-Acting",
      "voltage_rating": "250/32",
      "edison_series": "AGC",
      "brush_dorman_series": "AGC",
      "bussmann_series": "AGC",
      "mersen_gould_series": "GGC",
      "littelfuse_series": "312",
      "id": "agc-250-32-fast-acting-1-4-x1-4-glass",
      "url": "https://referencesource.org/fuse-cross-reference-by-manufacturer-class/agc-250-32-fast-acting-1-4-x1-4-glass/",
      "source": "https://cdn.automationdirect.com/static/specs/efusexref.pdf",
      "source_quote": "1/4\u201dx1/4\u201dGlass 250/32 AGC AGC AGC GGC \u2013 312",
      "verified_fields": [
        "brush_dorman_series",
        "bussmann_series",
        "edison_series",
        "littelfuse_series",
        "mersen_gould_series",
        "voltage_rating"
      ],
      "derived_fields": [
        "fuse_class",
        "operating_style"
      ]
    },
    {
      "fuse_class": "RK5",
      "operating_style": "Time-Delay Dual Element",
      "voltage_rating": "250",
      "edison_series": "ECNR",
      "bussmann_series": "FRN-R",
      "mersen_gould_series": "TR",
      "littelfuse_series": "FLNR",
      "id": "ecnr-250-time-delay-dual-element-rk5",
      "url": "https://referencesource.org/fuse-cross-reference-by-manufacturer-class/ecnr-250-time-delay-dual-element-rk5/",
      "source": "https://cdn.automationdirect.com/static/specs/efusexref.pdf",
      "source_quote": "Time-Delay Dual 250 ECNR \u2013 FRN-R TR \u2013 FLNR RK5",
      "verified_fields": [
        "bussmann_series",
        "edison_series",
        "littelfuse_series",
        "mersen_gould_series",
        "voltage_rating"
      ],
      "derived_fields": [
        "fuse_class",
        "operating_style"
      ]
    },
    {
      "fuse_class": "RK5",
      "operating_style": "Time-Delay Dual Element",
      "voltage_rating": "600",
      "edison_series": "ECSR",
      "bussmann_series": "FRS-R",
      "mersen_gould_series": "TRS",
      "littelfuse_series": "FLSR",
      "id": "ecsr-600-time-delay-dual-element-rk5",
      "url": "https://referencesource.org/fuse-cross-reference-by-manufacturer-class/ecsr-600-time-delay-dual-element-rk5/",
      "source": "https://cdn.automationdirect.com/static/specs/efusexref.pdf",
      "source_quote": "RK5 Element 600 ECSR \u2013 FRS-R TRS \u2013 FLSR",
      "verified_fields": [
        "bussmann_series",
        "edison_series",
        "littelfuse_series",
        "mersen_gould_series",
        "voltage_rating"
      ],
      "derived_fields": [
        "fuse_class",
        "operating_style"
      ]
    },
    {
      "fuse_class": "CC",
      "operating_style": "Time-Delay",
      "voltage_rating": "600",
      "edison_series": "EDCC",
      "bussmann_series": "LP-CC",
      "mersen_gould_series": "ATDR",
      "littelfuse_series": "CCMR",
      "id": "edcc-600-time-delay-cc",
      "url": "https://referencesource.org/fuse-cross-reference-by-manufacturer-class/edcc-600-time-delay-cc/",
      "source": "https://cdn.automationdirect.com/static/specs/efusexref.pdf",
      "source_quote": "Time-Delay 600 EDCC \u2013 LP-CC ATDR \u2013 CCMR",
      "verified_fields": [
        "bussmann_series",
        "edison_series",
        "littelfuse_series",
        "mersen_gould_series",
        "voltage_rating"
      ],
      "derived_fields": [
        "fuse_class",
        "operating_style"
      ]
    },
    {
      "fuse_class": "5x20 mm Glass",
      "operating_style": "Fast-Acting",
      "voltage_rating": "250/125",
      "edison_series": "GMA",
      "brush_dorman_series": "GMA",
      "bussmann_series": "GMA",
      "mersen_gould_series": "GGM",
      "littelfuse_series": "235",
      "id": "gma-250-125-fast-acting-5x20-mm-glass",
      "url": "https://referencesource.org/fuse-cross-reference-by-manufacturer-class/gma-250-125-fast-acting-5x20-mm-glass/",
      "source": "https://cdn.automationdirect.com/static/specs/efusexref.pdf",
      "source_quote": "5x20 mm Fast-Acting 250/125 GMA GMA GMA GGM \u2013 235",
      "verified_fields": [
        "brush_dorman_series",
        "bussmann_series",
        "edison_series",
        "littelfuse_series",
        "mersen_gould_series",
        "voltage_rating"
      ],
      "derived_fields": [
        "fuse_class",
        "operating_style"
      ]
    },
    {
      "fuse_class": "5x20 mm Glass",
      "operating_style": "Medium Time-Delay",
      "voltage_rating": "250/125",
      "edison_series": "GMC",
      "brush_dorman_series": "GMC",
      "bussmann_series": "GMC",
      "mersen_gould_series": "GSC",
      "id": "gmc-250-125-medium-time-delay-5x20-mm-glass",
      "url": "https://referencesource.org/fuse-cross-reference-by-manufacturer-class/gmc-250-125-medium-time-delay-5x20-mm-glass/",
      "source": "https://cdn.automationdirect.com/static/specs/efusexref.pdf",
      "source_quote": "Glass Medium Time-Delay 250/125 GMC GMC GMC GSC \u2013 \u2013",
      "verified_fields": [
        "brush_dorman_series",
        "bussmann_series",
        "edison_series",
        "mersen_gould_series",
        "voltage_rating"
      ],
      "derived_fields": [
        "fuse_class",
        "operating_style"
      ]
    },
    {
      "fuse_class": "CC",
      "operating_style": "Fast-Acting",
      "voltage_rating": "600",
      "edison_series": "HCLR",
      "brush_dorman_series": "HCLR",
      "bussmann_series": "KTK-R",
      "mersen_gould_series": "ATMR",
      "gec_cefco_series": "CTK-R",
      "littelfuse_series": "KLKR",
      "id": "hclr-600-fast-acting-cc",
      "url": "https://referencesource.org/fuse-cross-reference-by-manufacturer-class/hclr-600-fast-acting-cc/",
      "source": "https://cdn.automationdirect.com/static/specs/efusexref.pdf",
      "source_quote": "Fast-Acting 600 HCLR HCLR KTK-R ATMR CTK-R KLKR",
      "verified_fields": [
        "brush_dorman_series",
        "bussmann_series",
        "edison_series",
        "gec_cefco_series",
        "littelfuse_series",
        "mersen_gould_series",
        "voltage_rating"
      ],
      "derived_fields": [
        "fuse_class",
        "operating_style"
      ]
    },
    {
      "fuse_class": "CC",
      "operating_style": "Time-Delay",
      "voltage_rating": "600",
      "edison_series": "HCTR",
      "bussmann_series": "FNQ-R",
      "mersen_gould_series": "ATQR",
      "littelfuse_series": "KLDR",
      "id": "hctr-600-time-delay-cc",
      "url": "https://referencesource.org/fuse-cross-reference-by-manufacturer-class/hctr-600-time-delay-cc/",
      "source": "https://cdn.automationdirect.com/static/specs/efusexref.pdf",
      "source_quote": "CC Time-Delay 600 HCTR \u2013 FNQ-R ATQR \u2013 KLDR",
      "verified_fields": [
        "bussmann_series",
        "edison_series",
        "littelfuse_series",
        "mersen_gould_series",
        "voltage_rating"
      ],
      "derived_fields": [
        "fuse_class",
        "operating_style"
      ]
    },
    {
      "fuse_class": "J",
      "operating_style": "Time-Delay Dual Element",
      "voltage_rating": "600",
      "edison_series": "JDL",
      "bussmann_series": "LPJ",
      "mersen_gould_series": "AJT",
      "littelfuse_series": "JTD",
      "id": "jdl-600-time-delay-dual-element-j",
      "url": "https://referencesource.org/fuse-cross-reference-by-manufacturer-class/jdl-600-time-delay-dual-element-j/",
      "source": "https://cdn.automationdirect.com/static/specs/efusexref.pdf",
      "source_quote": "Time-Delay Dual 600 JDL \u2013 LPJ AJT \u2013 JTD Element",
      "verified_fields": [
        "bussmann_series",
        "edison_series",
        "littelfuse_series",
        "mersen_gould_series",
        "voltage_rating"
      ],
      "derived_fields": [
        "fuse_class",
        "operating_style"
      ]
    },
    {
      "fuse_class": "J",
      "operating_style": "High-Speed AC Drive",
      "voltage_rating": "600",
      "edison_series": "JHL",
      "bussmann_series": "DFJ",
      "mersen_gould_series": "HSJ",
      "id": "jhl-600-high-speed-ac-drive-j",
      "url": "https://referencesource.org/fuse-cross-reference-by-manufacturer-class/jhl-600-high-speed-ac-drive-j/",
      "source": "https://cdn.automationdirect.com/static/specs/efusexref.pdf",
      "source_quote": "High-Speed AC 600 JHL \u2013 DFJ HSJ \u2013 \u2013 Drive",
      "verified_fields": [
        "bussmann_series",
        "edison_series",
        "mersen_gould_series",
        "voltage_rating"
      ],
      "derived_fields": [
        "fuse_class",
        "operating_style"
      ]
    },
    {
      "fuse_class": "L",
      "operating_style": "Fast-Acting",
      "voltage_rating": "600",
      "edison_series": "LCU",
      "brush_dorman_series": "LCU",
      "bussmann_series": "KTU",
      "mersen_gould_series": "A4BY",
      "gec_cefco_series": "CL, CLU",
      "littelfuse_series": "LDC",
      "id": "lcu-600-fast-acting-l",
      "url": "https://referencesource.org/fuse-cross-reference-by-manufacturer-class/lcu-600-fast-acting-l/",
      "source": "https://cdn.automationdirect.com/static/specs/efusexref.pdf",
      "source_quote": "L Fast-Acting 600 LCU LCU KTU A4BY CL, CLU LDC",
      "verified_fields": [
        "brush_dorman_series",
        "bussmann_series",
        "edison_series",
        "gec_cefco_series",
        "littelfuse_series",
        "mersen_gould_series",
        "voltage_rating"
      ],
      "derived_fields": [
        "fuse_class",
        "operating_style"
      ]
    },
    {
      "fuse_class": "RK1",
      "operating_style": "Time-Delay Dual Element",
      "voltage_rating": "250",
      "edison_series": "LENRK",
      "bussmann_series": "LPN-RK-SP",
      "mersen_gould_series": "A2DR",
      "littelfuse_series": "LLNRK",
      "id": "lenrk-250-time-delay-dual-element-rk1",
      "url": "https://referencesource.org/fuse-cross-reference-by-manufacturer-class/lenrk-250-time-delay-dual-element-rk1/",
      "source": "https://cdn.automationdirect.com/static/specs/efusexref.pdf",
      "source_quote": "Time-Delay Dual 250 LENRK \u2013 LPN-RK-SP A2DR \u2013 LLNRK RK1",
      "verified_fields": [
        "bussmann_series",
        "edison_series",
        "littelfuse_series",
        "mersen_gould_series",
        "voltage_rating"
      ],
      "derived_fields": [
        "fuse_class",
        "operating_style"
      ]
    },
    {
      "fuse_class": "RK1",
      "operating_style": "Time-Delay Dual Element",
      "voltage_rating": "600",
      "edison_series": "LESRK",
      "bussmann_series": "LPS-RK-SP",
      "mersen_gould_series": "A6DR",
      "mersen_gould_note": "Not dual element 110\u2013600Amp",
      "littelfuse_series": "LLSRK",
      "id": "lesrk-600-time-delay-dual-element-rk1",
      "url": "https://referencesource.org/fuse-cross-reference-by-manufacturer-class/lesrk-600-time-delay-dual-element-rk1/",
      "source": "https://cdn.automationdirect.com/static/specs/efusexref.pdf",
      "source_quote": "RK1 Element 600 LESRK \u2013 LPS-RK-SP A6DR \u2013 LLSRK",
      "verified_fields": [
        "bussmann_series",
        "edison_series",
        "littelfuse_series",
        "mersen_gould_note",
        "mersen_gould_series",
        "voltage_rating"
      ],
      "derived_fields": [
        "fuse_class",
        "operating_style"
      ]
    },
    {
      "fuse_class": "Midget",
      "operating_style": "Fast-Acting",
      "voltage_rating": "600",
      "edison_series": "MCL",
      "brush_dorman_series": "MCL",
      "bussmann_series": "KTK",
      "mersen_gould_series": "ATM",
      "gec_cefco_series": "CTK",
      "littelfuse_series": "KLK",
      "id": "mcl-600-fast-acting-midget",
      "url": "https://referencesource.org/fuse-cross-reference-by-manufacturer-class/mcl-600-fast-acting-midget/",
      "source": "https://cdn.automationdirect.com/static/specs/efusexref.pdf",
      "source_quote": "600 MCL MCL KTK ATM CTK KLK Fast-Acting",
      "verified_fields": [
        "brush_dorman_series",
        "bussmann_series",
        "edison_series",
        "gec_cefco_series",
        "littelfuse_series",
        "mersen_gould_series",
        "voltage_rating"
      ],
      "derived_fields": [
        "fuse_class",
        "operating_style"
      ]
    },
    {
      "fuse_class": "1/4\u201dx1/4\u201d Ceramic",
      "operating_style": "Time-Delay",
      "voltage_rating": "250",
      "edison_series": "MDA",
      "brush_dorman_series": "MDA",
      "bussmann_series": "MDA",
      "littelfuse_series": "326",
      "id": "mda-250-time-delay-1-4-x1-4-ceramic",
      "url": "https://referencesource.org/fuse-cross-reference-by-manufacturer-class/mda-250-time-delay-1-4-x1-4-ceramic/",
      "source": "https://cdn.automationdirect.com/static/specs/efusexref.pdf",
      "source_quote": "1/4\u201dx1/4\u201d 250 MDA MDA MDA \u2013 \u2013 326 Ceramic Time-Delay",
      "verified_fields": [
        "brush_dorman_series",
        "bussmann_series",
        "edison_series",
        "littelfuse_series",
        "voltage_rating"
      ],
      "derived_fields": [
        "fuse_class",
        "operating_style"
      ]
    },
    {
      "fuse_class": "1/4\u201dx1/4\u201dGlass",
      "operating_style": "Time-Delay",
      "voltage_rating": "250/32",
      "edison_series": "MDL",
      "brush_dorman_series": "MDL",
      "bussmann_series": "MDL",
      "mersen_gould_series": "GDL",
      "littelfuse_series": "313",
      "id": "mdl-250-32-time-delay-1-4-x1-4-glass",
      "url": "https://referencesource.org/fuse-cross-reference-by-manufacturer-class/mdl-250-32-time-delay-1-4-x1-4-glass/",
      "source": "https://cdn.automationdirect.com/static/specs/efusexref.pdf",
      "source_quote": "1/4\u201dx1/4\u201dGlass 250/32 MDL MDL MDL GDL \u2013 313",
      "verified_fields": [
        "brush_dorman_series",
        "bussmann_series",
        "edison_series",
        "littelfuse_series",
        "mersen_gould_series",
        "voltage_rating"
      ],
      "derived_fields": [
        "fuse_class",
        "operating_style"
      ]
    },
    {
      "fuse_class": "Midget",
      "operating_style": "Time-Delay",
      "voltage_rating": "250",
      "edison_series": "MEN",
      "brush_dorman_series": "MEN",
      "bussmann_series": "FNM",
      "mersen_gould_series": "TRM",
      "littelfuse_series": "FLM",
      "id": "men-250-time-delay-midget",
      "url": "https://referencesource.org/fuse-cross-reference-by-manufacturer-class/men-250-time-delay-midget/",
      "source": "https://cdn.automationdirect.com/static/specs/efusexref.pdf",
      "source_quote": "Time-Delay 250 MEN MEN FNM TRM \u2013 FLM",
      "verified_fields": [
        "brush_dorman_series",
        "bussmann_series",
        "edison_series",
        "littelfuse_series",
        "mersen_gould_series",
        "voltage_rating"
      ],
      "derived_fields": [
        "fuse_class",
        "operating_style"
      ]
    },
    {
      "fuse_class": "Midget",
      "operating_style": "Time-Delay",
      "voltage_rating": "500",
      "edison_series": "MEQ",
      "brush_dorman_series": "MEQ",
      "bussmann_series": "FNQ",
      "mersen_gould_series": "ATQ",
      "littelfuse_series": "FLQ",
      "id": "meq-500-time-delay-midget",
      "url": "https://referencesource.org/fuse-cross-reference-by-manufacturer-class/meq-500-time-delay-midget/",
      "source": "https://cdn.automationdirect.com/static/specs/efusexref.pdf",
      "source_quote": "Midget 500 MEQ MEQ FNQ ATQ \u2013 FLQ Time-Delay",
      "verified_fields": [
        "brush_dorman_series",
        "bussmann_series",
        "edison_series",
        "littelfuse_series",
        "mersen_gould_series",
        "voltage_rating"
      ],
      "derived_fields": [
        "fuse_class",
        "operating_style"
      ]
    },
    {
      "fuse_class": "Midget",
      "operating_style": "Fast-Acting",
      "voltage_rating": "250",
      "edison_series": "MOL",
      "brush_dorman_series": "MOL",
      "bussmann_series": "BAF/BAN",
      "mersen_gould_series": "OTM",
      "littelfuse_series": "BLF",
      "id": "mol-250-fast-acting-midget",
      "url": "https://referencesource.org/fuse-cross-reference-by-manufacturer-class/mol-250-fast-acting-midget/",
      "source": "https://cdn.automationdirect.com/static/specs/efusexref.pdf",
      "source_quote": "Fast-Acting 250 MOL MOL BAF/BAN OTM \u2013 BLF Midget",
      "verified_fields": [
        "brush_dorman_series",
        "bussmann_series",
        "edison_series",
        "littelfuse_series",
        "mersen_gould_series",
        "voltage_rating"
      ],
      "derived_fields": [
        "fuse_class",
        "operating_style"
      ]
    },
    {
      "fuse_class": "5x20 mm Glass",
      "operating_style": "Fast-Acting",
      "voltage_rating": "250",
      "edison_series": "S500",
      "brush_dorman_series": "BDB",
      "bussmann_series": "GDB",
      "mersen_gould_series": "GSB",
      "littelfuse_series": "217",
      "id": "s500-250-fast-acting-5x20-mm-glass",
      "url": "https://referencesource.org/fuse-cross-reference-by-manufacturer-class/s500-250-fast-acting-5x20-mm-glass/",
      "source": "https://cdn.automationdirect.com/static/specs/efusexref.pdf",
      "source_quote": "5x20 mm Fast-Acting 250 S500 BDB GDB GSB \u2013 217",
      "verified_fields": [
        "brush_dorman_series",
        "bussmann_series",
        "edison_series",
        "littelfuse_series",
        "mersen_gould_series",
        "voltage_rating"
      ],
      "derived_fields": [
        "fuse_class",
        "operating_style"
      ]
    },
    {
      "fuse_class": "5x20 mm Glass",
      "operating_style": "Time-Delay",
      "voltage_rating": "250",
      "edison_series": "S506",
      "brush_dorman_series": "BDC",
      "bussmann_series": "GDC",
      "mersen_gould_series": "GDG",
      "littelfuse_series": "218",
      "id": "s506-250-time-delay-5x20-mm-glass",
      "url": "https://referencesource.org/fuse-cross-reference-by-manufacturer-class/s506-250-time-delay-5x20-mm-glass/",
      "source": "https://cdn.automationdirect.com/static/specs/efusexref.pdf",
      "source_quote": "Glass Time-Delay 250 S506 BDC GDC GDG \u2013 218",
      "verified_fields": [
        "brush_dorman_series",
        "bussmann_series",
        "edison_series",
        "littelfuse_series",
        "mersen_gould_series",
        "voltage_rating"
      ],
      "derived_fields": [
        "fuse_class",
        "operating_style"
      ]
    },
    {
      "fuse_class": "T",
      "operating_style": "Extremely Fast-Acting",
      "voltage_rating": "300",
      "edison_series": "TJN",
      "bussmann_series": "JJN",
      "mersen_gould_series": "A3T",
      "littelfuse_series": "JLLN",
      "id": "tjn-300-extremely-fast-acting-t",
      "url": "https://referencesource.org/fuse-cross-reference-by-manufacturer-class/tjn-300-extremely-fast-acting-t/",
      "source": "https://cdn.automationdirect.com/static/specs/efusexref.pdf",
      "source_quote": "Extremely Fast- 300 TJN \u2013 JJN A3T \u2013 JLLN T",
      "verified_fields": [
        "bussmann_series",
        "edison_series",
        "littelfuse_series",
        "mersen_gould_series",
        "voltage_rating"
      ],
      "derived_fields": [
        "fuse_class",
        "operating_style"
      ]
    },
    {
      "fuse_class": "T",
      "operating_style": "Extremely Fast-Acting",
      "voltage_rating": "600",
      "edison_series": "TJS",
      "bussmann_series": "JJS",
      "mersen_gould_series": "A6T",
      "littelfuse_series": "JLLS",
      "id": "tjs-600-extremely-fast-acting-t",
      "url": "https://referencesource.org/fuse-cross-reference-by-manufacturer-class/tjs-600-extremely-fast-acting-t/",
      "source": "https://cdn.automationdirect.com/static/specs/efusexref.pdf",
      "source_quote": "T Acting 600 TJS \u2013 JJS A6T \u2013 JLLS",
      "verified_fields": [
        "bussmann_series",
        "edison_series",
        "littelfuse_series",
        "mersen_gould_series",
        "voltage_rating"
      ],
      "derived_fields": [
        "fuse_class",
        "operating_style"
      ]
    }
  ]
}