CMB-083-11CNN-R-A Circuit Breaker Equivalent & Substitute Parts

Part Overview

The CMB-083-11CNN-R-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 holds active product status with full compliance to CE, cUL, TUV, UL1077, and UL1500 standards. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when inventory constraints require component alternatives that maintain equivalent electrical and mechanical specifications.

Key Parameters

Parameter	Value
Manufacturer Part Number	CMB-083-11CNN-R-A
Manufacturer	Carling Technologies
Series	CMB
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
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the CMB-083-11CNN-R-A are qualified based on the following critical parameters that determine functional equivalence:

Matching Parameters (Required for Substitution):

Current Rating: 8A
Voltage Rating - AC: 250V
Mounting Type: Panel Mount
Breaker Type: Thermal
Actuator Type: Push to Reset
Number of Poles: 1

Allowable Variance:

Voltage Rating - DC: The main part specifies 32V DC. Substitute parts rated at 50V DC are acceptable as this represents a higher voltage capability and maintains backward compatibility with the 32V DC requirement.

All identified substitute parts are manufactured by OptiFuse under the CBW57 series and satisfy these equivalence criteria. Each substitute maintains the same current rating, AC voltage rating, mounting configuration, and actuation method as the primary part.

Parameter Comparison

Parameter	CMB-083-11CNN-R-A (Carling)	CBW57-PS-8A-5X (OptiFuse)	CBW57-EJ-8A (OptiFuse)	CBW57-HS-8A (OptiFuse)	CBW57-AS-8A (OptiFuse)	CBW57-PB-8A-5X (OptiFuse)
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
Breaker Type	Thermal	Thermal	Thermal	Thermal	Thermal	Thermal
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 listed as substitutes maintain active product status and full ROHS3 compliance, ensuring long-term availability and regulatory conformance. The substitute parts carry approval certifications including cURus, UL 1077, and UL 1500, which overlap with the primary part's certification portfolio.

The primary distinction among substitute options relates to physical actuator design variants within the CBW57 series (PS, EJ, HS, AS, and PB designations). These variants represent different mechanical actuator configurations but maintain identical electrical performance specifications. Selection among these variants depends on mechanical interface requirements specific to the end application.

The DC voltage rating increase from 32V to 50V in all substitute parts represents an enhanced capability that does not compromise compatibility with systems designed for the original 32V DC specification. This higher rating provides additional operational margin in DC applications.

Frequently Asked Questions (FAQ)

Q: Can OptiFuse CBW57 series breakers directly replace the Carling CMB-083-11CNN-R-A?

A: Yes. All five identified OptiFuse CBW57 variants match the critical electrical parameters: 8A current rating, 250V AC voltage rating, single-pole configuration, thermal operation, and push-to-reset actuation. The 50V DC rating of the substitutes exceeds the 32V DC requirement of the primary part, maintaining full compatibility.

Q: What is the difference between the five OptiFuse substitute part numbers?

A: The CBW57-PS-8A-5X, CBW57-EJ-8A, CBW57-HS-8A, CBW57-AS-8A, and CBW57-PB-8A-5X variants differ in mechanical actuator design. All maintain identical electrical specifications. The specific variant selection depends on the mechanical interface and actuator style required by the application.

Q: Are there compliance or certification differences between the primary part and substitutes?

A: The primary part carries CE, cUL, TUV, UL1077, and UL1500 certifications. The substitute parts carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 certifications. Both sets include UL 1077 and UL 1500 standards. Application-specific certification requirements should be verified against the end-use regulatory environment.

Q: Does the higher DC voltage rating of the substitutes affect performance in 32V DC applications?

A: No. A higher voltage rating indicates the component can safely operate at higher voltages without degradation. A 50V DC-rated breaker operates normally in 32V DC circuits and provides additional operational margin.

Q: What inventory levels are available for each substitute part?

A: CBW57-HS-8A has the highest inventory at 3,442 pieces. CBW57-PB-8A-5X has 1,332 pieces, CBW57-AS-8A has 1,145 pieces, CBW57-PS-8A-5X has 1,096 pieces, and CBW57-EJ-8A has 1,027 pieces. All parts are listed as new original stock in bulk packaging.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All five OptiFuse CBW57 variants are ROHS3 compliant, matching the environmental compliance status of the primary Carling part.

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