Equivalent & Substitute Parts for BK/AGC-8 Glass Cartridge Fuse

Part Overview

The BK/AGC-8 is an 8 A, 250 V AC/DC fast-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This fuse is designed for use in 3AB and 3AG holders with dimensions of 1/4" x 1-1/4" (6.35mm x 31.75mm). The BK/AGC-8 is classified as obsolete product status. Equivalent and substitute parts are necessary to maintain circuit protection functionality in applications where the original component is no longer readily available or where active product variants are preferred for new designs and ongoing production support.

Substiute Parts

BK/AGC-8

Eaton - Electronics DivisionIn Stock: 614BK/AGC-8 Datasheet

Current PartRFQ

AGC-8-R

Eaton - Electronics DivisionIn Stock: 883AGC-8-R Datasheet

DirectRFQ

BK/AGC-8-R

Eaton - Electronics DivisionIn Stock: 1947BK/AGC-8-R Datasheet

DirectRFQ

0312008.HXP

Littelfuse Inc.In Stock: 11330312008.HXP Datasheet

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0312008.MXP

Littelfuse Inc.In Stock: 63130312008.MXP Datasheet

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0312008.TXP

Littelfuse Inc.In Stock: 8250312008.TXP Datasheet

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0312008.VXP

Littelfuse Inc.In Stock: 11900312008.VXP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the BK/AGC-8 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Current Rating: 8 A
• Voltage Rating (AC): 250 V
• Fuse Type: Cartridge, Glass
• Response Time: Fast Blow
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4"
• Breaking Capacity @ Rated Voltage: 200 A
• Operating Temperature Range: -55°C ~ 125°C
• Size / Dimension: 0.250" Dia x 1.250" L (6.35mm x 31.75mm)
• Mounting Type: Requires Holder

All substitute parts listed meet these mandatory parameters. Substitute parts are grouped into two categories: direct manufacturer equivalents from Eaton - Electronics Division (AGC-8-R, BK/AGC-8-R) and cross-manufacturer alternatives from Littelfuse Inc. (0312008.HXP, 0312008.MXP, 0312008.TXP, 0312008.VXP). Cross-manufacturer substitutes maintain electrical and mechanical compatibility while differing in melting I²t characteristics and DC cold resistance values, which remain within acceptable operational ranges for this fuse category.

Parameter Comparison

Engineering Selection Recommendations

Eaton - Electronics Division Direct Substitutes (AGC-8-R, BK/AGC-8-R):

AGC-8-R and BK/AGC-8-R are direct functional equivalents of the obsolete BK/AGC-8. Both parts maintain identical electrical characteristics (melting I²t of 256, DC cold resistance of 0.009 Ohms) and are classified as active products with ROHS3 compliance. These parts are recommended for applications requiring exact electrical performance matching and continuity with the original Eaton AGC series design. BK/AGC-8-R offers the highest inventory availability (1849 Pcs) among Eaton variants.

Littelfuse Inc. Cross-Manufacturer Substitutes (0312008.HXP, 0312008.MXP, 0312008.TXP, 0312008.VXP):

The Littelfuse 312 series parts (0312008.HXP, 0312008.MXP, 0312008.TXP, 0312008.VXP) provide functional substitution with identical electrical ratings and mechanical compatibility. These parts differ in melting I²t (166 versus 256) and DC cold resistance (0.0122 Ohms versus 0.009 Ohms). All Littelfuse variants are active products with ROHS3 compliance and expanded approval agency certifications (CE, CSA, KC, PSE, UL). 0312008.MXP offers the highest inventory availability (6247 Pcs) among all substitute options.

Product Status Consideration:

The BK/AGC-8 is obsolete. Selection of active product variants (AGC-8-R, BK/AGC-8-R, or Littelfuse 312 series) ensures ongoing supply chain support and manufacturing continuity.

Frequently Asked Questions (FAQ)

Q: Can AGC-8-R and BK/AGC-8-R be used interchangeably with BK/AGC-8?

A: Yes. AGC-8-R and BK/AGC-8-R are direct substitutes with identical electrical and mechanical specifications. Both are active products from Eaton - Electronics Division with ROHS3 compliance.

Q: What is the difference between Eaton AGC-8-R and Littelfuse 0312008 series fuses?

A: Both meet the same electrical ratings (8 A, 250 V AC, fast-blow, 200 A breaking capacity) and mechanical package (3AB, 3AG, 1/4" x 1-1/4"). Differences exist in melting I²t (Eaton: 256 versus Littelfuse: 166) and DC cold resistance (Eaton: 0.009 Ohms versus Littelfuse: 0.0122 Ohms). Both are functionally compatible for circuit protection applications.

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

A: Yes. All substitute parts are specified for 3AB and 3AG holder compatibility with identical physical dimensions (0.250" Dia x 1.250" L).

Q: Which substitute part has the best inventory availability?

A: 0312008.MXP (Littelfuse Inc.) has the highest inventory availability at 6247 Pcs. Among Eaton variants, BK/AGC-8-R has 1849 Pcs available.

Q: Are Littelfuse 0312008.HXP, 0312008.MXP, 0312008.TXP, and 0312008.VXP electrically identical?

A: Yes. All four Littelfuse variants share identical electrical ratings, melting I²t (166), DC cold resistance (0.0122 Ohms), and approval certifications. Differences are limited to packaging and internal design variants within the 312 series.

Q: What approval agencies certify these fuses?

A: Eaton AGC variants are certified by CSA and UL. Littelfuse 312 series variants are certified by CE, CSA, KC, PSE, and UL, providing broader international compliance coverage.

Q: Is RoHS compliance a factor in selecting a substitute?

A: The original BK/AGC-8 is RoHS non-compliant. All active substitute parts (AGC-8-R, BK/AGC-8-R, and Littelfuse 312 series) are ROHS3 compliant, meeting current environmental standards for new designs and production.