CMB-073-11C3N-B-A Equivalent & Substitute Parts

Part Overview

The CMB-073-11C3N-B-A is a thermal circuit breaker manufactured by Carling Technologies, rated for 7A at 250V AC and 32V DC. This single-pole, panel-mount breaker features push-to-reset actuation and is designed for overcurrent protection in low-voltage DC and AC applications. The part maintains Active product status with full compliance to ROHS3 standards and multiple approval agencies including CE, cUL, TUV, UL1077, and UL1500. Equivalent substitute parts are identified based on matching electrical ratings, mechanical mounting characteristics, and functional specifications.

Key Parameters

Parameter	Value
Current Rating	7A
Voltage Rating - AC	250V
Voltage Rating - DC	32V
Breaker Type	Thermal
Mounting Type	Panel Mount
Actuator Type	Push to Reset
Number of Poles	1
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the CMB-073-11C3N-B-A is determined by strict equivalence across the following parameters:

Current Rating: 7A (exact match required)
Voltage Rating - AC: 250V (exact match required)
Voltage Rating - DC: 32V (exact match required)
Breaker Type: Thermal (exact match required)
Mounting Type: Panel Mount (exact match required)
Actuator Type: Push to Reset (exact match required)
Number of Poles: 1 (exact match required)

All identified substitute parts meet these criteria. Variations in manufacturer, series designation, RoHS compliance status, and REACH classification do not affect functional interchangeability within the specified electrical and mechanical parameters.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Current Rating (A)	Voltage AC (V)	Voltage DC (V)	Breaker Type	Mounting Type	Actuator Type	Poles	Product Status	RoHS Status	Inventory (Pcs)
CMB-073-11C3N-B-A	Carling Technologies	CMB	7	250	32	Thermal	Panel Mount	Push to Reset	1	Active	ROHS3 Compliant	1086
QLB-073-00DNN-3BA	Qualtek	QLB	7	250	32	Thermal	Panel Mount	Push to Reset	1	Active	ROHS3 Compliant	1344
QLB-073-11B3N-3BA	Qualtek	QLB	7	250	32	Thermal	Panel Mount	Push to Reset	1	Active	ROHS3 Compliant	1392
QMB-073-00ENN-3BA	Qualtek	QMB	7	250	32	Thermal	Panel Mount	Push to Reset	1	Active	ROHS3 Compliant	1201
QMB-073-11C3N-3BA	Qualtek	QMB	7	250	32	Thermal	Panel Mount	Push to Reset	1	Active	ROHS3 Compliant	1357
W28-XQ1A-7	TE Connectivity Potter & Brumfield Relays	W28	7	250	32	Thermal	Panel Mount	Push to Reset	1	Active	RoHS non-compliant	8087
W28-XT1A-7	TE Connectivity Potter & Brumfield Relays	W28	7	250	32	Thermal	Panel Mount	Push to Reset	1	Active	ROHS3 Compliant	964

Engineering Selection Recommendations

All substitute parts listed maintain Active product status and are electrically and mechanically equivalent to the CMB-073-11C3N-B-A. Selection between alternatives should consider the following factors:

RoHS Compliance: The CMB-073-11C3N-B-A is ROHS3 Compliant. Qualtek alternatives (QLB and QMB series) are also ROHS3 Compliant. The W28-XT1A-7 from TE Connectivity is ROHS3 Compliant, while W28-XQ1A-7 is RoHS non-compliant. Applications requiring ROHS3 compliance should exclude W28-XQ1A-7.

Approval Agencies: The CMB-073-11C3N-B-A carries approvals from CE, cUL, TUV, UL1077, and UL1500. The QMB-073-00ENN-3BA and QMB-073-11C3N-3BA carry TUV approval. Applications requiring specific regulatory certifications should verify alignment with system requirements.

Inventory Availability: W28-XQ1A-7 offers the highest inventory level at 8087 pieces. QLB-073-11B3N-3BA provides 1392 pieces. CMB-073-11C3N-B-A maintains 1086 pieces in stock.

Frequently Asked Questions (FAQ)

Q: Can W28-XQ1A-7 be used as a direct replacement for CMB-073-11C3N-B-A?

A: W28-XQ1A-7 is electrically and mechanically equivalent and meets all functional substitution criteria. However, it is RoHS non-compliant, whereas CMB-073-11C3N-B-A is ROHS3 Compliant. Selection depends on whether RoHS compliance is required for the application.

Q: What is the difference between QLB and QMB series substitutes?

A: Both QLB and QMB series from Qualtek are parametrically equivalent to the CMB-073-11C3N-B-A across all electrical and mechanical specifications. The series designation reflects internal manufacturer classification but does not affect functional interchangeability.

Q: Are all substitutes available in the same packaging format?

A: All listed parts are supplied in Bulk packaging, consistent with the CMB-073-11C3N-B-A.

Q: Which substitute offers the best regulatory coverage?

A: The CMB-073-11C3N-B-A maintains the broadest approval agency coverage with CE, cUL, TUV, UL1077, and UL1500 certifications. QMB series alternatives carry TUV approval. Applications with specific regulatory requirements should verify alignment with system certifications.

Q: Can substitutes be mixed in the same assembly?

A: All substitutes are functionally equivalent across the specified parameters. Assembly design should account for any differences in physical form factor or connector interface, though these are not indicated in the provided specifications.

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