Equivalent & Substitute Parts for BK/AGC-1/10 Glass Cartridge Fuse

Part Overview

The BK/AGC-1/10 is a 100 mA, 250 V AC/DC fast-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This component is classified as obsolete, requiring identification of active equivalent and substitute parts for ongoing circuit protection applications. The fuse is designed for 3AB and 3AG holder compatibility with dimensions of 0.250" diameter by 1.250" length (6.35mm x 31.75mm). Substitute parts must maintain identical electrical ratings, mechanical dimensions, and holder compatibility to ensure direct functional replacement without circuit redesign.

Substiute Parts

BK/AGC-1/10

Eaton - Electronics DivisionIn Stock: 864BK/AGC-1/10 Datasheet

Current PartRFQ

AGC-1/10-R

Eaton - Electronics DivisionIn Stock: 747AGC-1/10-R Datasheet

DirectRFQ

BK/AGC-1/10-R

Eaton - Electronics DivisionIn Stock: 924BK/AGC-1/10-R Datasheet

DirectRFQ

0312.100MXP

Littelfuse Inc.In Stock: 25120312.100MXP Datasheet

DirectRFQ

0312.100HXCCP

Littelfuse Inc.In Stock: 11030312.100HXCCP Datasheet

SimilarRFQ

0312.100HXP

Littelfuse Inc.In Stock: 11290312.100HXP Datasheet

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0312.100MXCCP

Littelfuse Inc.In Stock: 10340312.100MXCCP Datasheet

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0312.100VXP

Littelfuse Inc.In Stock: 9310312.100VXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/AGC-1/10 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Current Rating: 100 mA (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
• Mounting Type: Requires Holder (exact match required)
• Breaking Capacity @ Rated Voltage: 35A (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• Physical Dimensions: 0.250" Dia x 1.250" L (exact match required)

All substitute parts listed below meet these mandatory criteria. Variations in DC Cold Resistance (within the range of 11.28 to 17.55 Ohms) and Melting I²t (within the range of 0.001 to 0.00102) are acceptable as these do not affect holder compatibility or circuit protection function at the specified ratings.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation - Eaton Alternatives:

For direct replacement within the Eaton product line, AGC-1/10-R and BK/AGC-1/10-R are the preferred substitutes. Both parts are active products with current manufacturing status. BK/AGC-1/10-R offers ROHS3 compliance, providing enhanced regulatory alignment for new designs and procurement cycles. Both Eaton alternatives maintain identical electrical and mechanical specifications to the obsolete BK/AGC-1/10.

Secondary Recommendation - Littelfuse Alternatives:

The Littelfuse 312 series parts (0312.100MXP, 0312.100HXCCP, 0312.100HXP, 0312.100MXCCP, 0312.100VXP) provide functionally equivalent substitution with active product status and ROHS3 compliance. All Littelfuse alternatives carry CE, CSA, and UL approvals, meeting the same regulatory requirements as the original part. These parts are suitable for applications requiring cross-manufacturer sourcing or supply chain diversification.

Compliance Considerations:

The original BK/AGC-1/10 is RoHS non-compliant. All substitute parts listed are either RoHS Compliant or ROHS3 Compliant, making them suitable for applications subject to RoHS directives. All substitute parts are REACH Unaffected, ensuring compliance with chemical substance regulations.

Frequently Asked Questions (FAQ)

Q: Can I use any of the listed substitute parts as a direct replacement for BK/AGC-1/10?

A: Yes. All listed substitute parts meet the mandatory electrical and mechanical parameters: 100 mA current rating, 250 V AC voltage rating, fast-blow response, 3AB/3AG holder compatibility, and 0.250" x 1.250" physical dimensions. Direct installation in existing 3AB or 3AG fuse holders is supported without modification.

Q: What is the difference between Eaton AGC-1/10-R and BK/AGC-1/10-R?

A: Both are Eaton products with identical electrical and mechanical specifications. The primary difference is RoHS compliance status: AGC-1/10-R is RoHS Compliant, while BK/AGC-1/10-R is ROHS3 Compliant. Both are active products suitable for replacement applications.

Q: Are Littelfuse 312 series fuses compatible with 3AB and 3AG holders?

A: Yes. All Littelfuse 312 series parts listed (0312.100MXP, 0312.100HXCCP, 0312.100HXP, 0312.100MXCCP, 0312.100VXP) are specified for 3AB and 3AG holder compatibility with identical 0.250" x 1.250" dimensions. Physical and electrical compatibility is confirmed.

Q: Does DC Cold Resistance variation affect substitution suitability?

A: No. The original BK/AGC-1/10 has 17.55 Ohms DC Cold Resistance, while Littelfuse alternatives have 11.28 Ohms. This variation does not affect circuit protection function or holder compatibility at the specified 100 mA, 250 V rating. Both values are within acceptable ranges for this fuse category.

Q: What approvals do the substitute parts carry?

A: Eaton alternatives (AGC-1/10-R, BK/AGC-1/10-R) carry CSA and UL approvals. Littelfuse alternatives (0312 series) carry CE, CSA, and UL approvals. All approvals match or exceed the original BK/AGC-1/10 certification requirements.

Q: Is the original BK/AGC-1/10 still available?

A: The BK/AGC-1/10 is classified as obsolete. However, 794 pieces are currently in stock as new original inventory. For ongoing procurement, active substitute parts are recommended to ensure long-term supply chain continuity.

Q: Can I mix different substitute part manufacturers in the same circuit?

A: Yes. All substitute parts meet identical electrical and mechanical specifications. Mixing Eaton and Littelfuse parts within the same application is supported from a technical compatibility standpoint, provided all parts are installed in compatible 3AB or 3AG holders.