3D8UM 8A Circuit Breaker Equivalent & Substitute Parts

Part Overview

The 3D8UM is a thermal magnetic circuit breaker manufactured by Altech Corporation, rated for 8A at 480V AC / 80V DC with D-characteristic trip curve and lever actuator on DIN rail mounting. This component is active in production and ROHS3 compliant. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the V-EA series, ensuring functional interchangeability in applications requiring identical performance specifications.

Substiute Parts

3D8UM

Altech CorporationIn Stock: 9883D8UM Datasheet

Current PartRFQ

3C8UM

Altech CorporationIn Stock: 10523C8UM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 3C8UM is identified as a parametric equivalent to the 3D8UM based on the following matching criteria:

• Current Rating: 8A (identical)
• Voltage Rating - AC: 480V (identical)
• Voltage Rating - DC: 80V (identical)
• Breaker Type: Thermal Magnetic (identical)
• Number of Poles: 3 (identical)
• Mounting Type: DIN Rail (identical)
• Actuator Type: Lever (identical)
• Series: V-EA (identical)
• Approval Agencies: CSA, UL508, VDE (identical)
• RoHS Status: ROHS3 Compliant (identical)

The primary distinction between these parts is the trip characteristic curve: 3D8UM features D-characteristic while 3C8UM features C-characteristic. Both are members of the V-EA series and maintain identical electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

Both the 3D8UM and 3C8UM are active production components with identical regulatory certifications (CSA, UL508, VDE) and ROHS3 compliance. Selection between these parts depends on application-specific requirements for trip characteristic curve performance. The 3D8UM with D-characteristic is suitable for applications requiring higher inrush current tolerance, while the 3C8UM with C-characteristic is appropriate for standard circuit protection. Both maintain identical electrical ratings, mechanical form factor, and mounting specifications within the V-EA series.

Frequently Asked Questions (FAQ)

Q: Can 3C8UM replace 3D8UM in existing installations?

A: Substitution is possible only if the application permits C-characteristic trip curve operation in place of D-characteristic. The electrical and mechanical specifications are identical; the functional difference lies in trip response to inrush currents.

Q: Are there packaging differences between 3D8UM and 3C8UM?

A: Both parts are supplied in bulk packaging and maintain identical DIN rail mounting form factors. No mechanical adaptation is required for physical installation.

Q: Do both parts carry the same regulatory approvals?

A: Yes. Both 3D8UM and 3C8UM hold CSA, UL508, and VDE approvals and are ROHS3 compliant.

Q: What is the primary technical difference between these substitutes?

A: The trip characteristic curve distinguishes these parts. 3D8UM provides D-characteristic response; 3C8UM provides C-characteristic response. All other electrical and mechanical parameters are identical.

Q: Are both parts currently available?

A: Both parts are active production items. 3D8UM inventory: 883 pcs; 3C8UM inventory: 967 pcs.