3Z8UM 8A Circuit Breaker Z Characteristic DIN Rail

Part Overview

The 3Z8UM is a thermal magnetic circuit breaker manufactured by Altech Corporation, designed for DIN rail mounting applications. This three-pole breaker operates at 480 V AC and 80 V DC with an 8A current rating and lever actuator. The product is active and maintains inventory availability of 1116 units. Alternative models become necessary when specific thermal characteristics, compliance certifications, or supply chain requirements necessitate substitution while maintaining core electrical and mechanical compatibility.

Substiute Parts

3Z8UM

Altech CorporationIn Stock: 11513Z8UM Datasheet

Current PartRFQ

3C8UM

Altech CorporationIn Stock: 10523C8UM Datasheet

Parametric EquivalentRFQ

3D8UM

Altech CorporationIn Stock: 9883D8UM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3Z8UM is determined by matching the following core parameters: thermal magnetic breaker type, 8A current rating, 480 V AC and 80 V DC voltage ratings, three-pole configuration, DIN rail mounting, lever actuation, and V-EA series classification. The primary differentiator among substitute parts is the thermal characteristic designation (Z, C, or D), which defines the trip curve behavior. Parts 3C8UM and 3D8UM meet all electrical and mechanical requirements and are classified as parametric equivalents. Both substitute parts maintain identical voltage ratings, current capacity, pole count, mounting configuration, and actuator type. Compliance certifications vary: 3C8UM and 3D8UM include VDE approval in addition to CSA and UL508, while 3Z8UM carries CSA and UL508 only.

Parameter Comparison

Engineering Selection Recommendations

All three parts—3Z8UM, 3C8UM, and 3D8UM—are active products with ROHS3 compliance and identical electrical specifications. Selection between these parts should be based on thermal characteristic requirements specific to the application circuit. The 3C8UM and 3D8UM offer expanded certification coverage with VDE approval, providing additional compliance flexibility for international applications. Inventory levels support immediate procurement across all three options, with 3Z8UM maintaining the highest stock position at 1116 units.

Frequently Asked Questions (FAQ)

Q: Can 3C8UM or 3D8UM be used as direct replacements for 3Z8UM? A: Yes, both parts are parametric equivalents sharing identical electrical ratings (8A, 480 V AC, 80 V DC), mechanical configuration (three-pole, DIN rail, lever actuator), and series classification (V-EA). The thermal characteristic designation differs, which defines trip curve behavior but does not affect physical or electrical compatibility.

Q: What is the difference between Z, C, and D thermal characteristics? A: Thermal characteristics define the trip curve response of the breaker. These designations are provided in the part specifications and determine the breaker's response to overcurrent conditions. Selection depends on circuit protection requirements.

Q: Are there packaging differences between these parts? A: All three parts are supplied in bulk packaging with no differentiation in package type or configuration.

Q: Do the substitute parts carry the same certifications as 3Z8UM? A: 3Z8UM carries CSA and UL508 certifications. Both 3C8UM and 3D8UM carry CSA, UL508, and VDE certifications, providing additional compliance coverage.

Q: Which part should be selected for new designs? A: Selection should be based on the specific thermal characteristic requirement for the application circuit. All three parts are active products with full compliance and inventory availability.