BK/AGC-B-2 Equivalent & Substitute Parts Reference

Part Overview

The BK/AGC-B-2 is a 2 A 250 V AC DC fast-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This component is classified as obsolete and requires a holder (3AB, 3AG format). Due to its obsolete status, equivalent substitute parts with active product status are available from both Eaton and Littelfuse manufacturers. Substitution is necessary to ensure continued availability and access to components with current manufacturing support and compliance certifications.

Key Parameters

Parameter	Value
Current Rating	2 A
Voltage Rating - AC	250 V
Fuse Type	Cartridge, Glass
Response Time	Fast Blow
Package / Case	3AB, 3AG, 1/4" x 1-1/4"
Size / Dimension	0.250" Dia x 1.250" L (6.35mm x 31.75mm)
Breaking Capacity @ Rated Voltage	100A
Mounting Type	Requires Holder
Operating Temperature Range	-55°C ~ 125°C
Approval Agency	CSA, UL

Substitute Part Grouping Explanation

Substitute parts for the BK/AGC-B-2 are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalents (Eaton - Electronics Division): Parts AGC-2-R, BK-AGC-B-2-R, BK/AGC-2-R, and BK/AGC-2RX are direct parametric equivalents manufactured by Eaton. These parts maintain identical electrical specifications (2 A, 250 V AC, fast-blow response) and mechanical form factor (3AB, 3AG, 1/4" x 1-1/4"). All parametric equivalents have active product status and comply with ROHS3 or RoHS standards. The primary distinction among these parts is packaging format (Bulk or standard) and inventory availability.

Similar Equivalents (Littelfuse Inc.): Parts 0312002.HXP, 0312002.MXP, and 0312002.VXP are manufactured by Littelfuse and share identical electrical ratings (2 A, 250 V AC, fast-blow) and mechanical package specifications (3AB, 3AG, 1/4" x 1-1/4"). These parts are functionally interchangeable within the same holder assembly. Littelfuse parts carry expanded approval certifications (CE, CSA, KC, PSE, UL) and ROHS3 compliance.

Non-Equivalent Part (Littelfuse Inc.): Part 0224002.MXP differs in package format (2AG, 5mm x 15mm axial) and mounting type (through-hole), making it incompatible with 3AB/3AG holder requirements. This part is listed for reference only and is not suitable as a direct substitute.

Substitution is determined by matching: current rating (2 A), voltage rating (250 V AC), fuse type (cartridge glass), response time (fast-blow), and mechanical package (3AB, 3AG, 1/4" x 1-1/4").

Parameter Comparison

Part Number	Manufacturer	Current Rating (A)	Voltage AC (V)	Package / Case	Response Time	Breaking Capacity (A)	Product Status	RoHS Status	Approval Agency
BK/AGC-B-2	Eaton	2	250	3AB, 3AG, 1/4" x 1-1/4"	Fast Blow	100	Obsolete	RoHS non-compliant	CSA, UL
AGC-2-R	Eaton	2	250	3AB, 3AG, 1/4" x 1-1/4"	Fast Blow	100	Active	ROHS3 Compliant	CSA, UL
BK-AGC-B-2-R	Eaton	2	250	3AB, 3AG, 1/4" x 1-1/4"	Fast Blow	100	Active	Not specified	CSA, UL
BK/AGC-2-R	Eaton	2	250	3AB, 3AG, 1/4" x 1-1/4"	Fast Blow	100	Active	ROHS3 Compliant	CSA, UL
BK/AGC-2RR	Eaton	2	250	3AB, 3AG, 1/4" x 1-1/4"	Fast Blow	100	Active	RoHS Compliant	CSA, UL
BK/AGC-2RX	Eaton	2	250	3AB, 3AG, 1/4" x 1-1/4"	Fast Blow	100	Active	Not specified	CSA, UL
0312002.HXP	Littelfuse	2	250	3AB, 3AG, 1/4" x 1-1/4"	Fast Blow	100	Active	ROHS3 Compliant	CE, CSA, KC, PSE, UL
0312002.MXP	Littelfuse	2	250	3AB, 3AG, 1/4" x 1-1/4"	Fast Blow	100	Active	ROHS3 Compliant	CE, CSA, KC, PSE, UL
0312002.VXP	Littelfuse	2	250	3AB, 3AG, 1/4" x 1-1/4"	Fast Blow	100	Active	ROHS3 Compliant	CE, CSA, KC, PSE, UL

Engineering Selection Recommendations

Primary Substitutes (Recommended for New Designs):

Eaton AGC-2-R and BK/AGC-2-R are the preferred substitutes for the obsolete BK/AGC-B-2. Both parts maintain identical electrical and mechanical specifications while offering active product status and ROHS3 compliance. These parts are manufactured by the original equipment supplier and carry CSA and UL certifications matching the original component.

Alternative Substitutes (Cross-Manufacturer):

Littelfuse 0312002.MXP, 0312002.HXP, and 0312002.VXP provide functionally equivalent alternatives with expanded approval certifications (CE, CSA, KC, PSE, UL) and ROHS3 compliance. These parts are suitable for applications requiring multi-regional compliance documentation. Littelfuse parts are interchangeable within the same 3AB/3AG holder assembly.

Inventory Considerations:

Littelfuse 0312002.MXP offers the highest inventory availability (8,793 pcs), followed by Littelfuse 0312002.HXP (3,869 pcs). Eaton BK/AGC-2-R maintains 1,461 pcs in stock. Component selection should account for supply chain requirements and lead time constraints.

Compliance Status:

All recommended substitute parts comply with ROHS3 standards and carry current approval certifications. The original BK/AGC-B-2 is RoHS non-compliant and obsolete; substitution with any active-status equivalent ensures compliance with current regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can BK/AGC-B-2 be directly replaced with AGC-2-R or BK/AGC-2-R?

A: Yes. AGC-2-R and BK/AGC-2-R are parametric equivalents with identical electrical ratings (2 A, 250 V AC), response time (fast-blow), and mechanical package (3AB, 3AG, 1/4" x 1-1/4"). Both parts fit the same holder assembly without modification.

Q: Are Littelfuse 0312002 series parts compatible with Eaton AGC holders?

A: Yes. Littelfuse 0312002.MXP, 0312002.HXP, and 0312002.VXP share the identical 3AB, 3AG mechanical package and 1/4" x 1-1/4" form factor. These parts are mechanically and electrically interchangeable within the same holder.

Q: What is the difference between BK/AGC-2-R, BK-AGC-B-2-R, and BK/AGC-2RR?

A: All three parts are Eaton equivalents with identical electrical and mechanical specifications. Differences are limited to packaging format and RoHS compliance designation. BK/AGC-2-R and BK-AGC-B-2-R are ROHS3 compliant; BK/AGC-2RR is RoHS compliant. Selection should be based on packaging requirements and inventory availability.

Q: Why is 0224002.MXP not recommended as a substitute?

A: 0224002.MXP uses a different package format (2AG, 5mm x 15mm axial) and mounting type (through-hole). This part is incompatible with 3AB/3AG holder assemblies and cannot be used as a direct replacement.

Q: Which substitute part has the best availability?

A: Littelfuse 0312002.MXP has the highest inventory (8,793 pcs). For Eaton-sourced parts, BK/AGC-2-R maintains 1,461 pcs in stock.

Q: Do all substitute parts carry the same certifications as the original BK/AGC-B-2?

A: All recommended substitutes carry CSA and UL certifications matching the original part. Littelfuse parts carry additional certifications (CE, KC, PSE), providing broader regulatory coverage for international applications.

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