3D3UM Circuit Breaker - Equivalent & Substitute Parts

Part Overview

The 3D3UM is a thermal magnetic circuit breaker manufactured by Altech Corporation, rated for 3A at 480V AC and 80V DC. This DIN Rail-mounted breaker features a lever actuator and three poles, designed for industrial control applications requiring overcurrent and thermal protection. The part is currently active in production with full inventory availability. Substitute parts may be required due to supply constraints, regional availability, or specific application requirements within the same electrical and mechanical parameter range.

Substiute Parts

3D3UM

Altech CorporationIn Stock: 10313D3UM Datasheet

Current PartRFQ

3C3UM

Altech CorporationIn Stock: 7913C3UM Datasheet

Parametric EquivalentRFQ

3G3UM

Altech CorporationIn Stock: 7903G3UM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 3D3UM is substitutable with 3C3UM and 3G3UM based on identical electrical and mechanical parameters. All three parts share the following critical specifications:

• Current Rating: 3A
• Voltage Rating: 480V AC / 80V DC
• Breaker Type: Thermal Magnetic
• Mounting: DIN Rail
• Poles: 3
• Actuator: Lever
• Series: V-EA

The primary distinction between these parts is the trip characteristic designation (D, C, and G respectively), which defines the thermal-magnetic response curve. All three parts are manufactured by Altech Corporation and maintain compatibility within the V-EA series framework. Substitution is valid when the specific trip characteristic requirement permits selection of an alternative curve type.

Parameter Comparison

Engineering Selection Recommendations

All three circuit breaker models (3D3UM, 3C3UM, 3G3UM) are qualified for direct substitution based on identical electrical ratings, mechanical mounting, and core certifications. The 3D3UM and 3C3UM both carry CSA, UL508, and VDE approvals, while the 3G3UM carries CSA and UL508 approvals. Selection should be based on application-specific trip characteristic requirements and regional compliance mandates. All parts maintain ROHS3 compliance and active production status, ensuring long-term availability and supply chain reliability.

Frequently Asked Questions (FAQ)

Q: Can 3C3UM or 3G3UM be used as direct replacements for 3D3UM?

A: Yes, provided the application permits substitution of the trip characteristic. The D, C, and G designations indicate different thermal-magnetic response curves. Verify that the alternative curve type meets your circuit protection requirements before substitution.

Q: Are there any voltage or current rating differences between these parts?

A: No. All three parts are rated identically at 3A, 480V AC, and 80V DC. Substitution does not affect electrical performance in these parameters.

Q: Do all three parts have the same certifications?

A: The 3D3UM and 3C3UM carry CSA, UL508, and VDE approvals. The 3G3UM carries CSA and UL508 approvals. Verify that the substitute part meets your regional compliance requirements before selection.

Q: What is the difference between D, C, and G trip characteristics?

A: These designations define the thermal-magnetic response curve, determining the current and time thresholds at which the breaker trips. Selection depends on the specific protection requirements of your circuit.

Q: Are these parts interchangeable on DIN Rail installations?

A: Yes. All three parts use identical DIN Rail mounting and lever actuator configurations, ensuring mechanical compatibility in existing installations.

Q: What is the current inventory status for each part?

A: 3D3UM: 946 units, 3C3UM: 781 units, 3G3UM: 703 units. All are new original stock.