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CMB-083-27GNN-B-A Circuit Breaker Equivalent & Substitute Parts
Part Overview
The CMB-083-27GNN-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 breaker 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 to provide alternative sourcing options when the primary part is unavailable or when inventory requirements necessitate component alternatives with equivalent electrical and mechanical specifications.
Substiute Parts
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 |
| Illumination | None |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
All identified substitute parts are manufactured by OptiFuse and belong to the CBW57 series. Substitution is based on matching the following critical parameters: 8A current rating, 250V AC voltage rating, push-to-reset actuation, single-pole configuration, panel-mount installation, and thermal breaker type. All substitute parts maintain ROHS3 compliance and active product status.
The substitute parts (CBW57-PS-8A-5X, CBW57-EJ-8A, CBW57-HS-8A, CBW57-AS-8A, CBW57-PB-8A-5X) are electrically and mechanically equivalent to the CMB-083-27GNN-B-A within the specified parameter set. The DC voltage rating for substitute parts is 50V, which exceeds the 32V DC requirement of the main part, providing additional operational margin in DC applications.
Parameter Comparison
| Parameter | CMB-083-27GNN-B-A (Carling) | CBW57-PS-8A-5X (OptiFuse) | CBW57-EJ-8A (OptiFuse) | CBW57-HS-8A (OptiFuse) | CBW57-AS-8A (OptiFuse) | CBW57-PB-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 |
| Illumination | None | None | None | None | None | None |
| 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 substitute parts satisfy the electrical and mechanical requirements of the CMB-083-27GNN-B-A. Selection among the substitute options should be based on inventory availability and lead time requirements. The CBW57-HS-8A variant offers the highest current inventory level at 3,442 pieces, followed by CBW57-PB-8A-5X at 1,332 pieces.
All substitute parts carry regulatory approvals including cURus, UL 1077, and UL 1500 certifications, which align with the primary part's compliance framework. The OptiFuse CBW57 series maintains ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, supporting long-term storage and supply chain flexibility.
The 50V DC rating of substitute parts provides operational compatibility with the 32V DC specification of the main part, with no functional degradation in applications operating at or below 32V DC.
Frequently Asked Questions (FAQ)
Q: Can CBW57 series breakers directly replace the CMB-083-27GNN-B-A in existing panel installations?
A: Yes. All substitute parts share identical mounting type (panel mount), actuator mechanism (push to reset), current rating (8A), AC voltage rating (250V), pole configuration (1), and form factor specifications. Physical and electrical compatibility is maintained across all identified substitutes.
Q: What is the significance of the higher 50V DC rating on OptiFuse substitutes compared to the 32V DC rating of the Carling part?
A: The 50V DC rating on CBW57 series parts exceeds the 32V DC requirement, providing additional operational margin. Applications operating at 32V DC or lower are fully compatible with these substitutes without derating or performance compromise.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All five OptiFuse CBW57 variants (CBW57-PS-8A-5X, CBW57-EJ-8A, CBW57-HS-8A, CBW57-AS-8A, CBW57-PB-8A-5X) maintain ROHS3 compliance status, matching the environmental compliance profile of the CMB-083-27GNN-B-A.
Q: Which substitute part offers the best inventory availability?
A: CBW57-HS-8A provides the highest inventory level at 3,442 pieces in stock. CBW57-PB-8A-5X is the second option with 1,332 pieces available.
Q: Do the substitute parts carry equivalent regulatory certifications?
A: OptiFuse CBW57 series parts carry cURus, IP 40, SAE J1171, UL 1077, and UL 1500 approvals. While the specific certification set differs slightly from the Carling part (which includes CE, cUL, TUV, UL1077, UL1500), both product lines meet UL 1077 and UL 1500 standards for thermal circuit breaker applications.
Q: Are there any differences in the actuator mechanism between the main part and substitutes?
A: No. All parts utilize identical push-to-reset actuation, ensuring consistent operator interface and reset behavior across all options.
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