3E8UM 8A Circuit Breaker Equivalent & Substitute Parts

Part Overview

The 3E8UM is a thermal magnetic circuit breaker manufactured by Altech Corporation, rated for 8A at 480V AC and 80V DC. This DIN rail-mounted device features a lever actuator and three poles, designed for industrial electrical protection applications. The product is currently active and available in bulk packaging with 799 units in stock. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical specifications, and approval certifications to ensure direct interchangeability in circuit protection applications.

Substiute Parts

3E8UM

Altech CorporationIn Stock: 8853E8UM Datasheet

Current PartRFQ

3C8UM

Altech CorporationIn Stock: 10523C8UM Datasheet

Parametric EquivalentRFQ

3D8UM

Altech CorporationIn Stock: 9883D8UM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3E8UM is determined by the following critical parameters:

• Current Rating: 8A (exact match required)
• Voltage Rating - AC: 480V (exact match required)
• Voltage Rating - DC: 80V (exact match required)
• Breaker Type: Thermal Magnetic (exact match required)
• Number of Poles: 3 (exact match required)
• Mounting Type: DIN Rail (exact match required)
• Actuator Type: Lever (exact match required)
• Series: V-EA (same product family)

The 3E8UM has two qualified substitutes: 3C8UM and 3D8UM. Both parts are manufactured by Altech Corporation within the V-EA series and match all electrical and mechanical parameters. The primary distinction between these parts lies in their thermal-magnetic trip characteristics (E, C, and D designations), which define the response curve behavior under fault conditions. All three parts maintain identical voltage ratings, current capacity, and physical mounting specifications.

Parameter Comparison

Engineering Selection Recommendations

All three circuit breaker models (3E8UM, 3C8UM, 3D8UM) are active products with ROHS3 compliance and CSA/UL508 certification. The 3C8UM and 3D8UM provide additional VDE approval, extending regulatory coverage for European applications. Selection between these substitutes should be based on the specific thermal-magnetic trip characteristic required by the application circuit design. All parts are available in bulk packaging and maintain identical electrical performance specifications for 8A, 480V AC, 80V DC three-pole DIN rail installations.

Frequently Asked Questions (FAQ)

Q: Can 3C8UM or 3D8UM be used as direct replacements for 3E8UM?

A: Yes. Both 3C8UM and 3D8UM are parametric equivalents with identical current ratings (8A), voltage ratings (480V AC, 80V DC), pole configuration (3-pole), mounting type (DIN Rail), and actuator type (Lever). All three parts are manufactured by Altech Corporation within the V-EA series and are ROHS3 compliant with active product status.

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

A: The letters designate the thermal-magnetic trip characteristic curve, which defines the breaker's response behavior under overload and short-circuit fault conditions. The specific curve selection depends on the protected circuit's load characteristics and coordination requirements.

Q: Are there any compliance differences between these parts?

A: The 3E8UM carries CSA and UL508 approvals. The 3C8UM and 3D8UM carry CSA, UL508, and VDE approvals. Applications requiring VDE certification should specify 3C8UM or 3D8UM.

Q: Do these parts have the same physical dimensions and DIN rail compatibility?

A: Yes. All three parts are DIN rail-mounted with lever actuators and identical mechanical specifications for three-pole configuration.

Q: What packaging options are available?

A: All substitute parts are available in bulk packaging. Current inventory levels are 799 units (3E8UM), 967 units (3C8UM), and 883 units (3D8UM).