Equivalent & Substitute Parts for 3B5UM Circuit Breaker

Part Overview

The 3B5UM is a three-pole thermal magnetic circuit breaker manufactured by Altech Corporation, rated for 5A at 480V AC and 80V DC. This DIN rail-mounted device is part of the V-EA series and maintains active product status with CSA and UL508 certifications. Substitute parts become necessary when specific thermal magnetic characteristics (B, C, D, or E curve ratings) are required for application-specific load protection, or when inventory availability requires alternative sourcing from the same manufacturer's compatible product line.

Substiute Parts

3B5UM

Altech CorporationIn Stock: 7173B5UM Datasheet

Current PartRFQ

3C5UM

Altech CorporationIn Stock: 8773C5UM Datasheet

Parametric EquivalentRFQ

3D5UM

Altech CorporationIn Stock: 8873D5UM Datasheet

Parametric EquivalentRFQ

3E5UM

Altech CorporationIn Stock: 9903E5UM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

All substitute parts for the 3B5UM maintain identical electrical and mechanical specifications across the following critical parameters: 5A current rating, 480V AC and 80V DC voltage ratings, three-pole configuration, DIN rail mounting, lever actuator type, and thermal magnetic breaker classification. The V-EA series substitutes differ only in their thermal magnetic trip curve characteristics, designated by the letter suffix (B, C, D, or E curve). These curve designations define the time-current response of the breaker under fault conditions. All substitute parts are manufactured by Altech Corporation, carry ROHS3 compliance, and maintain active product status. Substitution is valid when the application requirements permit interchangeability of the thermal magnetic curve rating.

Parameter Comparison

Engineering Selection Recommendations

All four circuit breaker models (3B5UM, 3C5UM, 3D5UM, 3E5UM) are qualified substitutes within the V-EA series. Selection between these models is determined by the required thermal magnetic trip curve characteristic for the specific application. The 3B5UM, 3C5UM, 3D5UM, and 3E5UM designations correspond to B, C, D, and E curve ratings respectively, each providing different time-current response profiles under fault conditions. All models carry CSA and UL508 certifications, with 3C5UM and 3D5UM additionally certified by VDE. All parts maintain ROHS3 compliance and active product status. Selection should be based on application load characteristics and required protection curve, not on availability or certification differences, as all models meet the specified electrical and mechanical requirements.

Frequently Asked Questions (FAQ)

Q: Can 3C5UM, 3D5UM, and 3E5UM be used interchangeably with 3B5UM?

A: These parts are parametric equivalents with identical electrical ratings (5A, 480V AC, 80V DC), pole count (3), mounting type (DIN rail), and actuator type (lever). Interchangeability depends on whether the application permits substitution of the thermal magnetic curve characteristic. The letter suffix (B, C, D, E) defines the trip curve; selection must align with load protection requirements.

Q: What is the difference between B, C, D, and E curve designations?

A: These designations specify the thermal magnetic trip curve rating, which determines the time-current response of the breaker under fault conditions. Each curve provides different protection characteristics suitable for different load types and applications.

Q: Are all substitute parts certified to the same standards?

A: All four models carry CSA and UL508 certifications. The 3C5UM and 3D5UM additionally carry VDE certification. All models meet the specified compliance requirements for their respective applications.

Q: What is the inventory status for each part?

A: 3B5UM has 702 units in stock, 3C5UM has 829 units, 3D5UM has 876 units, and 3E5UM has 952 units available as new original stock.

Q: Are all substitute parts RoHS and REACH compliant?

A: All four models are ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements.