CMB-103-11C3N-B-A Equivalent & Substitute Parts

Part Overview

The CMB-103-11C3N-B-A is a thermal circuit breaker manufactured by Carling Technologies, rated for 10A at 250V AC and 32V DC with push-to-reset actuation and panel mount configuration. This part is currently active in production with 646 units in stock. Equivalent substitute parts are identified based on matching electrical specifications, mechanical mounting characteristics, and regulatory compliance requirements.

Key Parameters

Parameter	Value
Current Rating	10A
Voltage Rating - AC	250V
Voltage Rating - DC	32V
Breaker Type	Thermal
Actuator Type	Push to Reset
Mounting Type	Panel Mount
Number of Poles	1
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the CMB-103-11C3N-B-A are qualified based on the following criteria:

Electrical Parameters (Required Match):

Current Rating: 10A
Voltage Rating - AC: 250V
Voltage Rating - DC: 32V

Mechanical Parameters (Required Match):

Breaker Type: Thermal
Actuator Type: Push to Reset
Mounting Type: Panel Mount
Number of Poles: 1

Regulatory Compliance:

RoHS3 Compliance status
REACH status
Approval agencies (CE, cUL, TUV, UL1077, UL1500)

All substitute parts listed meet the core electrical and mechanical requirements. Variations in RoHS compliance and REACH status are noted for design consideration.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Current Rating	Voltage AC	Voltage DC	Breaker Type	Actuator Type	Mounting Type	Poles	RoHS Status	REACH Status	Inventory (Pcs)
CMB-103-11C3N-B-A	Carling Technologies	CMB	10A	250V	32V	Thermal	Push to Reset	Panel Mount	1	ROHS3 Compliant	REACH Unaffected	646
QLB-103-00DNN-3BA	Qualtek	QLB	10A	250V	32V	Thermal	Push to Reset	Panel Mount	1	ROHS3 Compliant	REACH Affected	1651
QLB-103-11B3N-3BA	Qualtek	QLB	10A	250V	32V	Thermal	Push to Reset	Panel Mount	1	ROHS3 Compliant	REACH Affected	1634
QMB-103-00ENN-3BA	Qualtek	QMB	10A	250V	32V	Thermal	Push to Reset	Panel Mount	1	ROHS3 Compliant	REACH Affected	3849
QMB-103-11C3N-3BA	Qualtek	QMB	10A	250V	32V	Thermal	Push to Reset	Panel Mount	1	ROHS3 Compliant	REACH Affected	1923
W28-XQ1A-10	TE Connectivity Potter & Brumfield Relays	W28	10A	250V	32V	Thermal	Push to Reset	Panel Mount	1	ROHS3 Compliant	REACH Unaffected	2200
W28-XQ1B-10	TE Connectivity Potter & Brumfield Relays	W28	10A	250V	32V	Thermal	Push to Reset	Panel Mount	1	ROHS3 Compliant	REACH Affected	899
W28-XT1A-10	TE Connectivity Potter & Brumfield Relays	W28	10A	250V	32V	Thermal	Push to Reset	Panel Mount	1	RoHS non-compliant	REACH Affected	2279

Engineering Selection Recommendations

ROHS3 Compliant Substitutes (Recommended for New Designs): All substitute parts except W28-XT1A-10 maintain ROHS3 compliance matching the original CMB-103-11C3N-B-A specification. QLB and QMB series parts from Qualtek and W28 series parts from TE Connectivity Potter & Brumfield Relays are suitable for applications requiring regulatory compliance with current environmental standards.

REACH Status Considerations: The original CMB-103-11C3N-B-A is REACH Unaffected. Substitute parts from Qualtek (QLB and QMB series) are REACH Affected. TE Connectivity W28-XQ1A-10 maintains REACH Unaffected status, matching the original part's regulatory profile. W28-XQ1B-10 and W28-XT1A-10 are REACH Affected.

Compliance Certifications: The original part carries CE, cUL, TUV, UL1077, and UL1500 approvals. QMB series parts from Qualtek carry TUV approval. Substitution decisions should account for specific certification requirements of the target application.

Non-Compliant Alternative: W28-XT1A-10 is RoHS non-compliant and should be used only in applications where RoHS compliance is not required.

Frequently Asked Questions (FAQ)

Q: What determines if a part can substitute for the CMB-103-11C3N-B-A?

A: Substitution is based on matching electrical ratings (10A, 250V AC, 32V DC), breaker type (thermal), actuator type (push to reset), mounting configuration (panel mount), and pole count (1). All listed substitute parts meet these core requirements.

Q: Are there differences in regulatory compliance between the main part and substitutes?

A: Yes. The CMB-103-11C3N-B-A is ROHS3 Compliant and REACH Unaffected. Most substitutes are ROHS3 Compliant but REACH Affected, except W28-XQ1A-10 which matches both compliance profiles. W28-XT1A-10 is RoHS non-compliant and should not be used in applications requiring RoHS compliance.

Q: Which substitute has the highest inventory availability?

A: QMB-103-00ENN-3BA from Qualtek has the highest inventory with 3849 units in stock, followed by W28-XQ1A-10 from TE Connectivity with 2200 units.

Q: Can I use W28-XT1A-10 as a direct replacement?

A: W28-XT1A-10 meets all electrical and mechanical specifications but is RoHS non-compliant. Use only if your application does not require RoHS compliance.

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

A: Both QLB and QMB series parts meet the electrical and mechanical requirements for substitution. The primary difference is the series designation; both are ROHS3 Compliant and REACH Affected.

Q: Does the CMB-103-11C3N-B-A have specific approval agencies that substitutes must match?

A: The original part carries CE, cUL, TUV, UL1077, and UL1500 approvals. QMB series substitutes carry TUV approval. Application-specific certification requirements should be verified before substitution.

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