BK/AGC-B-3 Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The BK/AGC-B-3 is a 3 A, 250 V AC/DC fast-blow glass cartridge fuse manufactured by Eaton Electronics Division. This component is designed for use in 3AB and 3AG fuse holders with a 1/4" x 1-1/4" form factor. The part maintains active product status and is RoHS non-compliant. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, response characteristics, and approval certifications to ensure direct functional replacement in circuit protection applications.

Substiute Parts

BK/AGC-B-3

Eaton - Electronics DivisionIn Stock: 809BK/AGC-B-3 Datasheet

Current PartRFQ

AGC-3-R

Eaton - Electronics DivisionIn Stock: 882AGC-3-R Datasheet

Parametric EquivalentRFQ

BK/AGC-3-R

Eaton - Electronics DivisionIn Stock: 6667BK/AGC-3-R Datasheet

Parametric EquivalentRFQ

0312003.HXP

Littelfuse Inc.In Stock: 14750312003.HXP Datasheet

SimilarRFQ

0312003.MXP

Littelfuse Inc.In Stock: 123840312003.MXP Datasheet

SimilarRFQ

0312003.VXP

Littelfuse Inc.In Stock: 7420312003.VXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BK/AGC-B-3 are classified into two categories based on parametric equivalence and compliance status:

Parametric Equivalents (Eaton Electronics Division): Parts AGC-3-R and BK/AGC-3-R are direct parametric equivalents manufactured by Eaton. These parts match all critical electrical parameters (3 A current rating, 250 V AC voltage rating, fast-blow response, 100 A breaking capacity) and mechanical specifications (3AB/3AG package, 1/4" x 1-1/4" dimensions). The primary distinction is RoHS compliance status: AGC-3-R and BK/AGC-3-R are ROHS3 compliant, whereas BK/AGC-B-3 is RoHS non-compliant.

Similar Equivalents (Littelfuse Inc.): Parts 0312003.HXP, 0312003.MXP, and 0312003.VXP are manufactured by Littelfuse and share identical electrical ratings, mechanical form factors, and approval certifications (CE, CSA, KC, PSE, UL). These parts differ in melting I²t value (14 versus 45.9 for the main part) and DC cold resistance (0.0427 Ohms versus 0.035 Ohms for the main part), but remain functionally compatible within the specified package and holder requirements.

Substitution is valid when the following parameters are maintained:

• Current Rating: 3 A
• Voltage Rating: 250 V AC
• Fuse Type: Cartridge, Glass
• Response Time: Fast Blow
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4"
• Mounting Type: Requires Holder

Parameter Comparison

Engineering Selection Recommendations

For RoHS Compliance Requirements: AGC-3-R and BK/AGC-3-R are ROHS3 compliant alternatives manufactured by Eaton. These parts maintain identical electrical and mechanical specifications to the BK/AGC-B-3 while meeting modern environmental compliance standards. Both parts are suitable for direct replacement in applications requiring RoHS certification.

For Extended Approval Coverage: The Littelfuse alternatives (0312003.HXP, 0312003.MXP, 0312003.VXP) provide broader international approval coverage including CE, KC, and PSE certifications in addition to CSA and UL. These parts are appropriate for applications requiring multi-regional compliance documentation.

For Parametric Equivalence: AGC-3-R and BK/AGC-3-R maintain identical melting I²t (45.9) and DC cold resistance (0.035 Ohms) values to the main part. The Littelfuse alternatives exhibit different thermal characteristics (melting I²t of 14 and DC cold resistance of 0.0427 Ohms) but remain functionally compatible within the specified electrical and mechanical parameters.

Inventory Availability: BK/AGC-3-R offers the highest inventory availability (6557 pcs), followed by 0312003.MXP (12307 pcs). Selection should consider supply chain requirements and lead time constraints.

Frequently Asked Questions (FAQ)

Q: Can AGC-3-R be used as a direct replacement for BK/AGC-B-3?

A: Yes. AGC-3-R is a parametric equivalent with identical current rating (3 A), voltage rating (250 V AC), response time (fast blow), breaking capacity (100 A), and mechanical form factor (3AB/3AG, 1/4" x 1-1/4"). The primary difference is RoHS compliance status. Both parts are manufactured by Eaton and approved by CSA and UL.

Q: What is the difference between Eaton and Littelfuse substitute parts?

A: Eaton parts (AGC-3-R, BK/AGC-3-R) maintain identical melting I²t (45.9) and DC cold resistance (0.035 Ohms) to the main part. Littelfuse parts (0312003.HXP, 0312003.MXP, 0312003.VXP) have different thermal characteristics (melting I²t of 14, DC cold resistance of 0.0427 Ohms) but share the same electrical ratings and mechanical dimensions. All parts are approved by CSA and UL.

Q: Are all substitute parts compatible with 3AB and 3AG fuse holders?

A: Yes. All substitute parts specified in this document are designed for 3AB and 3AG fuse holders with 1/4" x 1-1/4" dimensions. Mechanical compatibility is ensured across all listed alternatives.

Q: Which substitute part has the broadest approval coverage?

A: The Littelfuse parts (0312003.HXP, 0312003.MXP, 0312003.VXP) carry approvals from CE, CSA, KC, PSE, and UL. The Eaton parts (AGC-3-R, BK/AGC-3-R) carry CSA and UL approvals. Selection depends on regional compliance requirements.

Q: What is the significance of melting I²t differences between parts?

A: Melting I²t is a thermal characteristic that affects fuse response behavior. The main part BK/AGC-B-3 has a melting I²t of 45.9, while Littelfuse alternatives have a melting I²t of 14. Both values are within the fast-blow classification and maintain the same 3 A current rating and 250 V voltage rating. The difference reflects manufacturer design variation but does not affect functional compatibility within the specified electrical parameters.

Q: Can BK/AGC-3-R be used in applications requiring RoHS compliance?

A: Yes. BK/AGC-3-R is ROHS3 compliant and suitable for applications with RoHS requirements. It maintains all electrical and mechanical specifications of the original BK/AGC-B-3 while meeting environmental compliance standards.