2Z8UM 8A Circuit Breaker Equivalent & Substitute Parts

Part Overview

The 2Z8UM is an active thermal magnetic circuit breaker manufactured by Altech Corporation, designed for DIN rail mounting applications. This 8-ampere, 2-pole breaker operates at 480 V AC and 80 V DC with lever actuation and Z-characteristic trip curve. The part is ROHS3 compliant and holds CSA and UL508 approvals. Equivalent substitute parts are available within the V-EA series to accommodate supply chain flexibility, design variations, and regional certification requirements.

Key Parameters

Parameter	Value
Manufacturer	Altech Corporation
Series	V-EA
Breaker Type	Thermal Magnetic
Current Rating	8A
Voltage Rating - AC	480 V
Voltage Rating - DC	80 V
Number of Poles	2
Mounting Type	DIN Rail
Actuator Type	Lever
Packaging	Bulk
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 2Z8UM is determined by strict parametric equivalence across the following critical specifications:

Current Rating: 8A (all substitutes match)
Voltage Rating: 480 V AC / 80 V DC (all substitutes match)
Breaker Type: Thermal Magnetic (all substitutes match)
Number of Poles: 2 (all substitutes match)
Mounting Type: DIN Rail (all substitutes match)
Actuator Type: Lever (all substitutes match)
Series: V-EA (all substitutes match)
RoHS Status: ROHS3 Compliant (all substitutes match)

The substitute parts 2C8UM, 2D8UM, and 2G8UM differ only in their trip curve characteristic (C, D, and G respectively, versus Z for the main part). All other electrical and mechanical parameters remain identical. These parts are interchangeable in applications where the specific trip curve characteristic is not a design constraint.

Parameter Comparison

Part Number	Manufacturer	Series	Current Rating	Voltage AC	Voltage DC	Poles	Mounting	Actuator	Approvals	RoHS	Inventory
2Z8UM	Altech Corporation	V-EA	8A	480 V	80 V	2	DIN Rail	Lever	CSA, UL508	ROHS3	680 Pcs
2C8UM	Altech Corporation	V-EA	8A	480 V	80 V	2	DIN Rail	Lever	CSA, UL508, VDE	ROHS3	666 Pcs
2D8UM	Altech Corporation	V-EA	8A	480 V	80 V	2	DIN Rail	Lever	CSA, UL508, VDE	ROHS3	864 Pcs
2G8UM	Altech Corporation	V-EA	8A	480 V	80 V	2	DIN Rail	Lever	CSA, UL508	ROHS3	769 Pcs

Engineering Selection Recommendations

All four parts maintain active product status and ROHS3 compliance. Selection between 2Z8UM and its substitutes should be based on:

Trip curve requirement: The Z-characteristic (2Z8UM) is suitable for general-purpose applications. C-characteristic (2C8UM) and D-characteristic (2D8UM) provide faster trip response for sensitive loads. G-characteristic (2G8UM) offers delayed response for high inrush current applications.
Certification scope: 2C8UM and 2D8UM include VDE approval in addition to CSA and UL508, providing broader European compliance coverage. 2Z8UM and 2G8UM carry CSA and UL508 approvals.
Inventory availability: 2D8UM has the highest stock level (864 Pcs), followed by 2G8UM (769 Pcs), 2Z8UM (680 Pcs), and 2C8UM (666 Pcs).

Frequently Asked Questions (FAQ)

Q: Can 2C8UM, 2D8UM, and 2G8UM be used interchangeably with 2Z8UM?

A: These parts are parametrically equivalent in all electrical and mechanical specifications. Interchangeability depends on whether the application requires a specific trip curve characteristic. If the design specifies Z-characteristic, only 2Z8UM is appropriate. If trip curve is not specified, any of the four parts will function identically in the circuit.

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

A: These designations refer to the thermal magnetic trip curve response time. The letters indicate different sensitivity levels for fault detection. Selection must align with the protected circuit's inrush current profile and fault tolerance requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All four parts—2Z8UM, 2C8UM, 2D8UM, and 2G8UM—are ROHS3 compliant.

Q: Do the substitute parts have different approval certifications?

A: 2C8UM and 2D8UM include VDE approval in addition to CSA and UL508. 2Z8UM and 2G8UM carry CSA and UL508 approvals only. Application requirements may dictate which certification scope is necessary.

Q: Is packaging identical across all substitute parts?

A: Yes. All parts are supplied in bulk packaging.

Q: Can I substitute based on inventory availability alone?

A: No. Substitution must first confirm that the trip curve characteristic is compatible with the application design. Inventory availability is a secondary consideration after confirming parametric and functional equivalence.

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