2Z1UM 1A Circuit Breaker Z Char2 Equivalent & Substitute Parts

Part Overview

The 2Z1UM is a thermal magnetic circuit breaker manufactured by Altech Corporation, part of the V-EA series. This DIN rail-mounted breaker is rated for 1A at 480 V AC and 80 V DC with a lever actuator and 2-pole configuration. The product is active and ROHS3 compliant with CSA and UL508 approvals. Substitute parts are necessary when the Z characteristic curve is not required for the application, allowing selection from alternative characteristic types within the same electrical and mechanical specifications.

Key Parameters

Parameter	Value
Manufacturer	Altech Corporation
Series	V-EA
Mounting Type	DIN Rail
Breaker Type	Thermal Magnetic
Current Rating	1A
Voltage Rating - AC	480 V
Voltage Rating - DC	80 V
Actuator Type	Lever
Number of Poles	2
Approval Agencies	CSA, UL508
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

All substitute parts for the 2Z1UM maintain identical electrical and mechanical parameters: 1A current rating, 480 V AC / 80 V DC voltage ratings, 2-pole lever-actuated thermal magnetic operation, and DIN rail mounting. The substitution basis is the characteristic curve designation (Z, B, C, D, E, G), which defines the trip point behavior but does not alter the core electrical specifications or physical form factor. All substitutes are Altech Corporation V-EA series components with ROHS3 compliance and active product status.

Parameter Comparison

Part Number	Characteristic	Current Rating	Voltage AC	Voltage DC	Poles	Mounting	Approval Agency	Inventory (Pcs)
2Z1UM	Z	1A	480 V	80 V	2	DIN Rail	CSA, UL508	738
2B1UM	B	1A	480 V	80 V	2	DIN Rail	CSA, UL508	865
2C1UM	C	1A	480 V	80 V	2	DIN Rail	CSA, UL508, VDE	835
2D1UM	D	1A	480 V	80 V	2	DIN Rail	CSA, UL508, VDE	692
2E1UM	3	1A	480 V	80 V	2	DIN Rail	CSA, UL508	1006
2G1UM	G	1A	480 V	80 V	2	DIN Rail	CSA, UL508	1073

Engineering Selection Recommendations

Selection among 2Z1UM and its substitutes is determined by application-specific trip curve requirements. All candidates maintain identical electrical ratings (1A, 480 V AC, 80 V DC), mechanical form factor (DIN rail, 2-pole lever), and regulatory compliance (ROHS3, CSA, UL508). Parts 2C1UM and 2D1UM carry additional VDE certification. Inventory availability ranges from 692 to 1073 pieces across the substitute group. The choice of characteristic curve (Z, B, C, D, E, or G) must align with the load protection strategy and coordination requirements of the specific circuit application.

Frequently Asked Questions (FAQ)

Q: Can 2B1UM, 2C1UM, 2D1UM, 2E1UM, or 2G1UM be used as direct replacements for 2Z1UM?

A: Yes, all listed parts are parametric equivalents with identical current rating (1A), voltage ratings (480 V AC / 80 V DC), pole count (2), mounting type (DIN rail), and actuator type (lever). The difference is the characteristic curve, which defines trip point behavior but does not affect physical compatibility or electrical specifications.

Q: What is the difference between the characteristic designations (Z, B, C, D, E, G)?

A: Characteristic curves define the thermal-magnetic trip point thresholds. Selection depends on the application load profile and protection coordination strategy. All curves are available within the same 1A, 480 V AC / 80 V DC electrical envelope.

Q: Do all substitutes have the same certifications?

A: All parts carry CSA and UL508 approvals. Parts 2C1UM and 2D1UM additionally carry VDE certification. ROHS3 compliance is uniform across all parts.

Q: Are there packaging or form factor differences among these parts?

A: No. All parts are bulk-packaged, DIN rail-mounted, 2-pole thermal magnetic breakers with lever actuation. Physical dimensions and mounting footprint are identical.

Q: Which substitute has the highest inventory availability?

A: 2G1UM has the highest inventory at 1073 pieces, followed by 2E1UM at 1006 pieces.

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