Altech Corporation 1Z1UM 1A Circuit Breaker Z Char Equivalent & Substitute Parts

Part Overview

The 1Z1UM is a thermal magnetic circuit breaker manufactured by Altech Corporation, rated for 1A at 277 V AC and 42 V DC. This single-pole DIN rail-mounted breaker features a lever actuator and is approved by CSA and UL508. The product is active and available in bulk packaging with 718 units in stock. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical mounting specifications, and approval certifications to ensure direct interchangeability in circuit protection applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	1Z1UM
Manufacturer	Altech Corporation
Series	V-EA
Breaker Type	Thermal Magnetic
Current Rating	1A
Voltage Rating - AC	277 V
Voltage Rating - DC	42 V
Mounting Type	DIN Rail
Number of Poles	1
Actuator Type	Lever
Approval Agency	CSA, UL508
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 1Z1UM are identified based on the following critical parameters that determine interchangeability:

Matching Parameters (Required for Substitution):

Breaker Type: Thermal Magnetic
Current Rating: 1A
Mounting Type: DIN Rail
Number of Poles: 1
Actuator Type: Lever
Series: V-EA
Voltage Rating - DC: 42 V
RoHS Status: ROHS3 Compliant
Product Status: Active

Variable Parameter (Allows Substitution Variation):

Voltage Rating - AC: The 1Z1UM operates at 277 V AC. Substitute part 1C1UM operates at 480 V AC, which is a higher voltage rating. Parts 1E1UM and 1G1UM match the 277 V AC rating of the main part.

All substitute parts are manufactured by Altech Corporation within the V-EA series and maintain identical mechanical and electrical specifications except for AC voltage rating variations. The 1C1UM substitute is suitable for applications requiring higher AC voltage tolerance, while 1E1UM and 1G1UM provide direct voltage-matched alternatives.

Parameter Comparison

Parameter	1Z1UM	1C1UM	1E1UM	1G1UM
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)	1A	1A	1A	1A
Voltage Rating - AC	277 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	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

Direct Voltage-Matched Substitutes (1E1UM, 1G1UM): Parts 1E1UM and 1G1UM are fully equivalent to the 1Z1UM with identical AC voltage ratings of 277 V. Both parts carry CSA and UL508 approvals, matching the certification profile of the main part. These substitutes are suitable for direct replacement in applications where the 277 V AC specification is required.

Higher Voltage Rated Substitute (1C1UM): Part 1C1UM operates at 480 V AC, providing a higher voltage tolerance than the 1Z1UM. This part includes additional VDE approval certification. The 1C1UM is suitable for substitution in applications where higher AC voltage capability is beneficial or required, provided the circuit design accommodates the 480 V rating.

Compliance and Availability: All substitute parts maintain ROHS3 compliance and active product status. Inventory availability varies: 1E1UM has 1001 units in stock, 1G1UM has 704 units, and 1C1UM has 932 units available in bulk packaging.

Frequently Asked Questions (FAQ)

Q: Can the 1C1UM substitute for the 1Z1UM in a 277 V AC circuit? A: Yes. The 1C1UM is rated for 480 V AC, which exceeds the 277 V AC requirement of the 1Z1UM. A higher voltage-rated breaker operates safely at lower voltages within its rated range.

Q: What is the primary difference between the 1Z1UM and its substitutes? A: The primary difference is the AC voltage rating. The 1Z1UM and 1E1UM and 1G1UM are rated for 277 V AC, while the 1C1UM is rated for 480 V AC. All other electrical and mechanical parameters are identical.

Q: Are all substitute parts DIN rail compatible with the 1Z1UM? A: Yes. All substitute parts (1C1UM, 1E1UM, 1G1UM) use DIN rail mounting identical to the 1Z1UM and are mechanically interchangeable.

Q: Do the substitute parts carry the same certifications as the 1Z1UM? A: The 1E1UM and 1G1UM carry identical CSA and UL508 certifications. The 1C1UM carries CSA, UL508, and additional VDE approval.

Q: What is the current rating for all substitute parts? A: All substitute parts, including 1C1UM, 1E1UM, and 1G1UM, are rated for 1A, matching the 1Z1UM specification.

Q: Are these parts suitable for DC applications? A: Yes. All parts are rated for 42 V DC, enabling use in DC circuits within this voltage specification.

Q: What packaging is available for substitute parts? A: All substitute parts are available in bulk packaging, consistent with the 1Z1UM.

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