1B4UM 4A Circuit Breaker Equivalent & Substitute Parts

Part Overview

The 1B4UM is a thermal magnetic circuit breaker manufactured by Altech Corporation, rated for 4A at 480V AC / 42V DC with lever actuation and DIN rail mounting. This component is classified as Active product status with full CSA and UL508 approval. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical mounting specifications, and regulatory compliance certifications to ensure direct functional interchangeability in industrial control applications.

Substiute Parts

1B4UM

Altech CorporationIn Stock: 11211B4UM Datasheet

Current PartRFQ

1D4UM

Altech CorporationIn Stock: 8691D4UM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1B4UM are identified through parametric equivalence matching. The 1D4UM qualifies as a direct substitute based on identical electrical characteristics: 4A current rating, 480V AC / 42V DC voltage ratings, thermal magnetic trip mechanism, lever actuation, single-pole configuration, and DIN rail mounting. Both components belong to the Altech V-EA series and maintain equivalent form factor and installation requirements. Substitution is valid where the base product number differs (1B4 versus 1D4) while all functional and mechanical parameters remain constant.

Parameter Comparison

Engineering Selection Recommendations

Both the 1B4UM and 1D4UM are Active status products with full regulatory compliance. The 1D4UM provides extended certification coverage through additional VDE approval beyond the CSA and UL508 certifications shared with the 1B4UM. Selection between these parts should be based on specific regional compliance requirements and supply chain availability. Both components meet identical electrical and mechanical specifications for 4A thermal magnetic circuit protection in 480V AC / 42V DC industrial control systems with DIN rail installation.

Frequently Asked Questions (FAQ)

Q: Can the 1D4UM directly replace the 1B4UM in existing installations? A: Yes. Both parts share identical electrical ratings (4A, 480V AC / 42V DC), thermal magnetic trip characteristics, lever actuation, single-pole configuration, and DIN rail mounting. No circuit modifications are required.

Q: What is the difference between the 1B4UM and 1D4UM? A: The primary difference is the base product number designation (1B4 versus 1D4). The 1D4UM includes VDE certification in addition to CSA and UL508 approvals. All functional and mechanical parameters are identical.

Q: Are both parts available in the same packaging? A: Both the 1B4UM and 1D4UM are supplied in Bulk packaging format.

Q: Do these parts have the same approval certifications? A: Both parts carry CSA and UL508 certifications. The 1D4UM additionally includes VDE approval, providing broader regional compliance coverage.

Q: What mounting configuration do these circuit breakers require? A: Both the 1B4UM and 1D4UM mount directly to standard DIN rail systems with lever-operated manual actuation.