1Z5UM 5A Circuit Breaker Z Char Equivalent & Substitute Parts

Part Overview

The 1Z5UM is a single-pole thermal magnetic circuit breaker manufactured by Altech Corporation, rated for 5A at 277V AC and 42V DC. This DIN rail-mounted breaker features lever actuation and is certified by CSA and UL508. The part is currently active in production with 813 units in stock. Equivalent and substitute parts within the V-EA series share identical core electrical and mechanical specifications, differing primarily in thermal-magnetic trip characteristics and AC voltage ratings, enabling direct substitution in applications where these parameters align with system requirements.

Substiute Parts

1Z5UM

Altech CorporationIn Stock: 9211Z5UM Datasheet

Current PartRFQ

1C5UM

Altech CorporationIn Stock: 9591C5UM Datasheet

Parametric EquivalentRFQ

1D5UM

Altech CorporationIn Stock: 10151D5UM Datasheet

Parametric EquivalentRFQ

1E5UM

Altech CorporationIn Stock: 9611E5UM Datasheet

Parametric EquivalentRFQ

1G5UM

Altech CorporationIn Stock: 11931G5UM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

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

Fixed Parameters (Must Match for Substitution):

• Current Rating: 5A
• Mounting Type: DIN Rail
• Breaker Type: Thermal Magnetic
• Actuator Type: Lever
• Number of Poles: 1
• DC Voltage Rating: 42V
• Series: V-EA
• RoHS Status: ROHS3 Compliant

Variable Parameters (Differentiate Substitute Parts):

• AC Voltage Rating: 277V or 480V
• Trip Characteristic: Z, C, D, E, or G

The 1Z5UM operates at 277V AC with Z-characteristic trip behavior. Substitute parts 1C5UM, 1D5UM, 1E5UM, and 1G5UM maintain identical current, voltage (DC), mounting, and pole specifications but differ in AC voltage rating and trip characteristic designation. Parts rated for 480V AC (1C5UM, 1D5UM) are suitable for higher-voltage applications, while 277V-rated parts (1E5UM, 1G5UM) match the primary voltage class of the 1Z5UM.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain active product status and ROHS3 compliance. Selection between 1Z5UM and its equivalents depends on system voltage requirements:

For 277V AC systems, 1Z5UM, 1E5UM, and 1G5UM are directly applicable. For 480V AC systems, 1C5UM and 1D5UM provide equivalent functionality at the higher voltage rating. Parts 1C5UM and 1D5UM carry additional VDE certification beyond the CSA and UL508 approvals present on all parts, providing expanded compliance for European applications. All parts are manufactured by Altech Corporation within the V-EA series and maintain identical mechanical and electrical core specifications outside of voltage rating and trip characteristic designation.

Frequently Asked Questions (FAQ)

Q: Can 1Z5UM be replaced with 1C5UM or 1D5UM? A: Direct replacement is not recommended without system voltage verification. The 1Z5UM is rated for 277V AC, while 1C5UM and 1D5UM are rated for 480V AC. Substitution is only valid if the installation operates at 480V AC.

Q: What is the difference between Z, C, D, E, and G trip characteristics? A: These designations identify the thermal-magnetic trip curve behavior of each breaker. The specific trip characteristic is provided in the part number suffix and determines the breaker's response to overcurrent conditions. Selection must match the application's protection requirements.

Q: Are all substitute parts DIN rail compatible? A: Yes. All parts in this comparison are single-pole DIN rail-mounted breakers with lever actuation, ensuring mechanical compatibility within DIN rail enclosures.

Q: Do substitute parts require different certifications or approvals? A: All parts carry CSA and UL508 certification. Parts 1C5UM and 1D5UM additionally carry VDE certification, which may be required for specific regional or application standards.

Q: Can voltage ratings be mixed in the same installation? A: No. Circuit breakers must be selected to match the system voltage. Mixing 277V and 480V rated breakers in the same circuit is not permitted.

Q: Are all parts currently in stock? A: Yes. All substitute parts are active products with current inventory: 1Z5UM (813 pcs), 1C5UM (919 pcs), 1D5UM (962 pcs), 1E5UM (861 pcs), and 1G5UM (1137 pcs).