Altech Corporation 1C5UM Thermal Magnetic Circuit Breaker Equivalent & Substitute Parts

Part Overview

The Altech Corporation 1C5UM is a single-pole thermal magnetic circuit breaker rated for 5A at 480 V AC and 42 V DC, designed for DIN rail mounting with lever actuation. This component is active in production and widely used in industrial control and distribution applications. Substitute parts become necessary when the primary model is unavailable, when inventory constraints require alternative sourcing, or when application requirements permit operation within the defined electrical and mechanical parameter ranges of the V-EA series.

Key Parameters

Parameter	Value
Manufacturer Part Number	1C5UM
Manufacturer	Altech Corporation
Series	V-EA
Breaker Type	Thermal Magnetic
Current Rating	5A
Voltage Rating - AC	480 V
Voltage Rating - DC	42 V
Mounting Type	DIN Rail
Number of Poles	1
Actuator Type	Lever
Approval Agencies	CSA, UL508, VDE
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution within the Altech V-EA series is determined by the following critical parameters:

Current Rating: 5A (all substitutes maintain this specification)
Breaker Type: Thermal Magnetic (all substitutes maintain this specification)
Mounting Type: DIN Rail (all substitutes maintain this specification)
Number of Poles: 1 (all substitutes maintain this specification)
Actuator Type: Lever (all substitutes maintain this specification)
DC Voltage Rating: 42 V (all substitutes maintain this specification)

The primary differentiator among substitute parts is the AC voltage rating. The 1C5UM and 1D5UM are rated for 480 V AC, while the 1E5UM and 1G5UM are rated for 277 V AC. These voltage classes define distinct application domains and determine substitution eligibility based on the end-use circuit voltage.

Parameter Comparison

Parameter	1C5UM	1D5UM	1E5UM	1G5UM
Manufacturer	Altech Corporation	Altech Corporation	Altech Corporation	Altech Corporation
Series	V-EA	V-EA	V-EA	V-EA
Breaker Type	Thermal Magnetic	Thermal Magnetic	Thermal Magnetic	Thermal Magnetic
Current Rating (Amps)	5A	5A	5A	5A
Voltage Rating - AC	480 V	480 V	277 V	277 V
Voltage Rating - DC	42 V	42 V	42 V	42 V
Mounting Type	DIN Rail	DIN Rail	DIN Rail	DIN Rail
Number of Poles	1	1	1	1
Actuator Type	Lever	Lever	Lever	Lever
Approval Agency	CSA, UL508, VDE	CSA, UL508, VDE	CSA, UL508	CSA, UL508
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All four parts in this substitution group maintain active production status and comply with ROHS3 requirements. The 1C5UM and 1D5UM carry full certification from CSA, UL508, and VDE. The 1E5UM and 1G5UM carry CSA and UL508 certification. Selection between parts must be based on the circuit voltage requirement: 480 V AC applications require either 1C5UM or 1D5UM, while 277 V AC applications require either 1E5UM or 1G5UM. Within each voltage class, parts are mechanically and electrically interchangeable. The distinction between 1C5UM and 1D5UM relates to trip characteristic curves (C-curve versus D-curve), as does the distinction between 1E5UM and 1G5UM (3-curve versus G-curve). Application-specific inrush current and load characteristics determine which curve is appropriate.

Frequently Asked Questions (FAQ)

Q: Can I substitute a 277 V AC rated breaker for a 480 V AC application?

A: No. The voltage rating is a critical parameter that must match the circuit voltage. Using an undersized voltage rating creates a safety hazard and violates electrical code requirements.

Q: Are 1C5UM and 1D5UM fully interchangeable?

A: Both parts share identical electrical ratings (5A, 480 V AC, 42 V DC), mounting type (DIN Rail), pole count (1), and actuator type (Lever). They differ in trip characteristic curve. Substitution is valid only if the application permits the different curve characteristic.

Q: What is the difference between C-curve and D-curve breakers?

A: Trip characteristic curves define the thermal and magnetic trip thresholds. This information is provided in the part descriptions (1C5UM = C-curve, 1D5UM = D-curve) and must be selected based on the specific load and inrush current profile of the protected circuit.

Q: Do all parts carry the same certifications?

A: No. The 1C5UM and 1D5UM carry CSA, UL508, and VDE certifications. The 1E5UM and 1G5UM carry CSA and UL508 certifications. Verify that the required certifications for your application are present on the selected part.

Q: What packaging is available for these parts?

A: All parts are supplied in Bulk packaging.

Q: Are these parts RoHS compliant?

A: Yes. All four parts are ROHS3 Compliant.

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