# D140 · Siemens — UL-Classified replacement circuit breaker cross-reference by panel brand

For D140 · Siemens, brand of the classified breaker is Siemens; classified breaker catalog number is D140; ampere rating is 40; load centre brand it fits (specific listed models only) is Square D; breaker type replaced is QO, verified against its source on 2026-08-26.

- **Brand of the classified breaker:** Siemens
- **Classified breaker catalog number:** D140 _(verified: appears in the quote below)_
- **Ampere rating:** 40 _(verified: appears in the quote below)_
- **Load centre brand it fits (specific listed models only):** Square D
- **Breaker type replaced:** QO

## What the source says

> 40                         D140                           D240

## Source

- https://contractor.compas.siemens-info.com/assets/speedfax/SF17_Sect01.pdf

Last verified: 2026-08-26. Review by: 2028-08-25.
Part of [UL-Classified replacement circuit breaker cross-reference by panel brand](https://referencesource.org/ul-classified-circuit-breaker-cross-reference-by-brand/).