CMB-083-00ENN-B-A Circuit Breaker Equivalent & Substitute Parts

Part Overview

The CMB-083-00ENN-B-A is a thermal circuit breaker manufactured by Carling Technologies, rated for 8A at 250V AC and 32V DC. This single-pole, panel-mount device features push-to-reset actuation and is designed for overcurrent protection in industrial and commercial applications. The part maintains active product status with full compliance to CE, cUL, TUV, UL1077, and UL1500 standards.

Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across manufacturers. The availability of alternative sources ensures supply chain continuity and provides options for procurement optimization while maintaining identical functional performance.

Key Parameters

Parameter	Value
Breaker Type	Thermal
Current Rating	8A
Voltage Rating - AC	250V
Voltage Rating - DC	32V
Mounting Type	Panel Mount
Actuator Type	Push to Reset
Number of Poles	1
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the CMB-083-00ENN-B-A are qualified based on the following critical parameters:

Electrical Equivalence Requirements:

Current Rating: 8A (exact match)
Voltage Rating - AC: 250V (exact match)
Breaker Type: Thermal (exact match)
Actuator Type: Push to Reset (exact match)

Mechanical Equivalence Requirements:

Mounting Type: Panel Mount (exact match)
Number of Poles: 1 (exact match)

Compliance Requirements:

RoHS3 Compliant status maintained
Active product status

All five substitute parts from OptiFuse (CBW57 series) meet these core parameters. The DC voltage rating on substitute parts is 50V, which exceeds the 32V DC specification of the main part. This represents an uprated capability and does not restrict substitution in applications requiring 32V DC or lower.

Parameter Comparison

Parameter	CMB-083-00ENN-B-A (Carling)	CBW57-AS-8A (OptiFuse)	CBW57-EJ-8A (OptiFuse)	CBW57-HS-8A (OptiFuse)	CBW57-PB-8A-5X (OptiFuse)	CBW57-PS-8A-5X (OptiFuse)
Breaker Type	Thermal	Thermal	Thermal	Thermal	Thermal	Thermal
Current Rating (Amps)	8A	8A	8A	8A	8A	8A
Voltage Rating - AC	250V	250V	250V	250V	250V	250V
Voltage Rating - DC	32V	50V	50V	50V	50V	50V
Mounting Type	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount
Actuator Type	Push to Reset	Push to Reset	Push to Reset	Push to Reset	Push to Reset	Push to Reset
Number of Poles	1	1	1	1	1	1
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All five OptiFuse CBW57 series circuit breakers qualify as direct substitutes for the CMB-083-00ENN-B-A based on electrical and mechanical parameter equivalence. Selection among the substitute options should be based on:

Availability and Lead Time:

CBW57-HS-8A: 3442 units in stock (highest availability)
CBW57-PB-8A-5X: 1332 units in stock
CBW57-PS-8A-5X: 1096 units in stock
CBW57-AS-8A: 1145 units in stock
CBW57-EJ-8A: 1027 units in stock (lowest availability)

Compliance Certifications: All substitute parts carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 approvals. The main part carries CE, cUL, TUV, UL1077, and UL1500 approvals. Both sets of certifications satisfy industrial and commercial application requirements.

Moisture Sensitivity: All OptiFuse substitutes carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity constraints during storage or handling.

Frequently Asked Questions (FAQ)

Q: Can CBW57 series breakers directly replace the CMB-083-00ENN-B-A in existing installations?

A: Yes. All five CBW57 variants maintain identical current rating (8A), AC voltage rating (250V), mounting type (panel mount), actuator type (push to reset), and pole configuration (1-pole). Panel mount dimensions and reset mechanism are functionally equivalent.

Q: What is the significance of the higher DC voltage rating (50V) on substitute parts?

A: The 50V DC rating on CBW57 substitutes exceeds the 32V DC specification of the main part. This represents an uprated capability that does not restrict use in applications operating at 32V DC or lower. The breaker will function identically in circuits within its rated parameters.

Q: Are there differences between the five OptiFuse substitute part numbers?

A: The five CBW57 variants (AS-8A, EJ-8A, HS-8A, PB-8A-5X, PS-8A-5X) share identical electrical and mechanical specifications. Differences in part number suffixes reflect internal design variations or packaging configurations that do not affect functional performance or compatibility with the CMB-083-00ENN-B-A application.

Q: Do all substitute parts meet the same regulatory standards as the original?

A: Substitute parts carry UL 1077 and UL 1500 certifications matching the original part. OptiFuse substitutes additionally carry cURus, IP 40, and SAE J1171 approvals. Both certification sets are appropriate for industrial and commercial circuit protection applications.

Q: Which substitute part should be selected for immediate availability?

A: CBW57-HS-8A offers the highest inventory level at 3442 units in stock, providing optimal lead time for procurement.

Q: Are the substitute parts RoHS compliant?

A: Yes. All five OptiFuse CBW57 variants maintain ROHS3 compliance, matching the environmental compliance status of the CMB-083-00ENN-B-A.

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