W28-XTBA-3 Equivalent & Substitute Parts

Part Overview

The W28-XTBA-3 is a thermal circuit breaker manufactured by TE Connectivity Potter & Brumfield Relays, rated for 3A 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 product maintains active status with ROHS3 compliance and REACH affected designation. Substitute parts are identified to provide design flexibility, supply chain alternatives, and equivalent functional performance across compatible applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	W28-XTBA-3
Manufacturer	TE Connectivity Potter & Brumfield Relays
Series	W28
Breaker Type	Thermal
Current Rating	3A
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
REACH Status	REACH Affected
Packaging	Bulk

Substitute Part Grouping Explanation

Substitute parts for the W28-XTBA-3 are qualified based on strict electrical and mechanical parameter equivalence. All substitute parts share identical specifications across the following critical parameters:

Current Rating: 3A
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
RoHS Status: ROHS3 Compliant
REACH Status: REACH Affected
Packaging: Bulk

Substitution is valid when all listed parameters match the main part specification. Variations in manufacturer, series designation, or internal construction do not affect functional equivalence when these core parameters remain constant. Parts from TE Connectivity Potter & Brumfield Relays and Qualtek manufacturers are included in this equivalency list.

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	REACH Status
W28-XTBA-3	TE Connectivity Potter & Brumfield Relays	W28	3	250	32	Thermal	Panel Mount	Push to Reset	1	Active	ROHS3 Compliant	REACH Affected
W28-XQ1A-3	TE Connectivity Potter & Brumfield Relays	W28	3	250	32	Thermal	Panel Mount	Push to Reset	1	Active	ROHS3 Compliant	REACH Unaffected
W28-XQ1B-3	TE Connectivity Potter & Brumfield Relays	W28	3	250	32	Thermal	Panel Mount	Push to Reset	1	Active	ROHS3 Compliant	REACH Affected
W28-XT1A-3	TE Connectivity Potter & Brumfield Relays	W28	3	250	32	Thermal	Panel Mount	Push to Reset	1	Active	ROHS3 Compliant	REACH Affected
QLB-033-00DNN-3BA	Qualtek	QLB	3	250	32	Thermal	Panel Mount	Push to Reset	1	Active	ROHS3 Compliant	REACH Affected
QLB-033-11B3N-3BA	Qualtek	QLB	3	250	32	Thermal	Panel Mount	Push to Reset	1	Active	ROHS3 Compliant	REACH Affected
QMB-033-00ENN-3BA	Qualtek	QMB	3	250	32	Thermal	Panel Mount	Push to Reset	1	Active	ROHS3 Compliant	REACH Affected
QMB-033-11C3N-3BA	Qualtek	QMB	3	250	32	Thermal	Panel Mount	Push to Reset	1	Active	ROHS3 Compliant	REACH Affected

Engineering Selection Recommendations

All substitute parts listed maintain active product status and ROHS3 compliance, ensuring regulatory alignment with current manufacturing standards. Selection between the W28-XTBA-3 and equivalent alternatives should be based on the following factors:

TE Connectivity Potter & Brumfield Relays W28 Series Options: The W28-XQ1A-3, W28-XQ1B-3, and W28-XT1A-3 are direct manufacturer alternatives within the same W28 series. The W28-XQ1A-3 carries REACH Unaffected status, which may be advantageous for applications requiring exemption from REACH substance restrictions. The W28-XQ1B-3 and W28-XT1A-3 maintain REACH Affected status consistent with the main part.

Qualtek QLB and QMB Series Options: The QLB-033-00DNN-3BA and QLB-033-11B3N-3BA represent cross-manufacturer alternatives from Qualtek's QLB series. The QMB-033-00ENN-3BA and QMB-033-11C3N-3BA are Qualtek QMB series variants with TUV approval agency designation, providing additional certification documentation for regulated applications.

All parts share identical electrical ratings and mechanical mounting specifications, enabling direct substitution without circuit redesign or panel modification.

Frequently Asked Questions (FAQ)

Q: Can W28-XQ1A-3 be used as a direct replacement for W28-XTBA-3?

A: Yes. Both parts share identical current rating (3A), voltage ratings (250V AC, 32V DC), thermal breaker type, panel mount configuration, and push-to-reset actuation. The primary difference is REACH status; W28-XQ1A-3 is REACH Unaffected while W28-XTBA-3 is REACH Affected. Functional performance and electrical characteristics are equivalent.

Q: What is the difference between TE Connectivity and Qualtek thermal circuit breakers in this specification?

A: Both manufacturers provide 3A thermal circuit breakers with identical electrical and mechanical parameters. The primary differences are manufacturer identity and internal design variations. Qualtek QMB series parts include TUV approval agency certification. All parts are ROHS3 compliant and suitable for equivalent applications.

Q: Are Qualtek QLB and QMB series interchangeable?

A: Yes, within the 3A 250V AC / 32V DC specification. Both QLB and QMB series from Qualtek meet the same electrical and mechanical requirements. The QMB series carries additional TUV approval designation. Selection between series depends on specific approval requirements for the end application.

Q: Does REACH Affected versus REACH Unaffected status affect circuit performance?

A: No. REACH status indicates regulatory substance compliance classification and does not alter electrical performance, current rating, voltage rating, or thermal characteristics. Selection based on REACH status depends on regulatory requirements for the target market or application jurisdiction.

Q: Can these thermal circuit breakers be used in both AC and DC circuits?

A: Yes. All listed parts are rated for 250V AC and 32V DC operation. The thermal breaker mechanism functions in both AC and DC applications within these voltage specifications.

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

A: Inventory quantities vary by part number. W28-XQ1A-3 maintains the highest stock level at 234,027 pieces. W28-XT1A-3 has 1,843 pieces available. Qualtek alternatives range from 1,225 to 1,501 pieces. Current inventory should be verified at time of procurement.

Q: Is panel mount configuration identical across all substitute parts?

A: Yes. All listed parts are panel mount thermal circuit breakers with push-to-reset actuation. Mechanical mounting dimensions and panel cutout requirements are equivalent, enabling direct installation without modification to existing panel assemblies.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message