1E4UM Thermal Magnetic Circuit Breaker Equivalent & Substitute Parts

Part Overview

The 1E4UM is a single-pole thermal magnetic circuit breaker manufactured by Altech Corporation, rated for 4A current with 277V AC and 42V DC voltage ratings. This DIN Rail-mounted breaker is designed for overcurrent protection in industrial and commercial electrical systems. The part is currently active in production with full inventory availability. Substitute parts are identified based on matching electrical specifications, mechanical compatibility, and regulatory certifications to ensure seamless integration in existing circuit protection applications.

Substiute Parts

1E4UM

Altech CorporationIn Stock: 6621E4UM Datasheet

Current PartRFQ

1C4UM

Altech CorporationIn Stock: 7911C4UM Datasheet

Parametric EquivalentRFQ

1G4UM

Altech CorporationIn Stock: 9051G4UM Datasheet

Parametric EquivalentRFQ

1Z4UM

Altech CorporationIn Stock: 9971Z4UM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1E4UM are identified based on the following critical parameters that determine functional equivalence:

• Current Rating: All substitutes maintain 4A rating
• Breaker Type: All substitutes are thermal magnetic
• Number of Poles: All substitutes are single-pole (1P)
• Actuator Type: All substitutes use lever actuation
• Mounting Type: All substitutes mount on DIN Rail
• Series: All substitutes belong to the V-EA series
• DC Voltage Rating: All substitutes maintain 42V DC rating
• Regulatory Compliance: All substitutes carry CSA and UL508 certifications

The primary distinction among substitute parts is the AC voltage rating, which varies based on the characteristic designation (E, C, G, Z). This variation allows selection based on specific circuit voltage requirements while maintaining identical current protection and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts are active products with full regulatory compliance. Selection between 1E4UM, 1G4UM, and 1Z4UM is determined by AC voltage circuit requirements, as these three parts share identical 277V AC ratings and certifications. The 1C4UM variant is suitable for 480V AC circuits and includes additional VDE certification, expanding compliance scope for European applications. All parts maintain ROHS3 compliance and carry equivalent mechanical and electrical specifications for DIN Rail installation. Inventory availability ranges from 652 to 918 units across all variants, supporting production requirements.

Frequently Asked Questions (FAQ)

Q: Can 1E4UM be replaced with 1G4UM or 1Z4UM? A: Yes. Both 1G4UM and 1Z4UM are direct substitutes for 1E4UM. All three parts share identical current rating (4A), voltage ratings (277V AC / 42V DC), pole configuration (1P), actuator type (Lever), mounting method (DIN Rail), and certifications (CSA, UL508). They are mechanically and electrically interchangeable.

Q: When should 1C4UM be used instead of 1E4UM? A: Use 1C4UM when the circuit operates at 480V AC. The 1C4UM is rated for 480V AC compared to 277V AC for 1E4UM. The 1C4UM also includes VDE certification for enhanced European market compliance. All other electrical and mechanical parameters remain identical.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All parts listed (1E4UM, 1C4UM, 1G4UM, 1Z4UM) are ROHS3 compliant and carry identical environmental compliance status.

Q: Do substitute parts require any installation modifications? A: No. All substitute parts use identical DIN Rail mounting and lever actuation. Physical installation and panel integration remain unchanged.

Q: What certifications apply to all substitute parts? A: CSA and UL508 certifications apply to all four parts. The 1C4UM includes additional VDE certification. All certifications are current and active.