Equivalent & Substitute Parts for BK/AGC-40

Part Overview

The BK/AGC-40 is a 40 A, 32 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 part is classified as obsolete, making identification of active equivalent substitutes essential for procurement and system continuity.

Substiute Parts

BK/AGC-40

Eaton - Electronics DivisionIn Stock: 843BK/AGC-40 Datasheet

Current PartRFQ

AGC-40-R

Eaton - Electronics DivisionIn Stock: 852AGC-40-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BK/AGC-40 is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Current Rating: 40 A
• Voltage Rating (AC): 32 V
• Fuse Type: Cartridge, Glass
• Response Time: Fast Blow
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4"
• Breaking Capacity: 1 kA @ Rated Voltage
• Melting I²t: 11360
• DC Cold Resistance: 0.0016 Ohms
• Operating Temperature Range: -55°C to 125°C
• Approval Agencies: CSA, UL

The AGC-40-R maintains identical electrical and mechanical specifications to the BK/AGC-40, ensuring direct functional equivalence. The primary distinction is product status: BK/AGC-40 is obsolete, while AGC-40-R is active.

Parameter Comparison

Engineering Selection Recommendations

The AGC-40-R is the direct functional equivalent of the BK/AGC-40. Selection between these parts is determined by regulatory and compliance requirements:

For New Designs and Procurement: AGC-40-R is the appropriate selection. This part is active in production, carries ROHS3 compliance certification, and maintains REACH unaffected status. It satisfies current environmental and regulatory standards while providing identical electrical and mechanical performance.

For Legacy System Maintenance: BK/AGC-40 remains functionally equivalent for existing installations where the obsolete part is already in service. However, AGC-40-R should be substituted when inventory of BK/AGC-40 is depleted, as it provides identical performance with improved compliance posture.

Both parts are certified by CSA and UL, operate across the identical temperature range (-55°C to 125°C), and are rated for 1 kA breaking capacity at 32 V AC.

Frequently Asked Questions (FAQ)

Q: Can AGC-40-R be used as a direct replacement for BK/AGC-40?

A: Yes. AGC-40-R is electrically and mechanically identical to BK/AGC-40. Both parts share the same current rating (40 A), voltage rating (32 V AC), response time (fast blow), package configuration (3AB, 3AG, 1/4" x 1-1/4"), breaking capacity (1 kA), and operating temperature range (-55°C to 125°C).

Q: What is the primary difference between BK/AGC-40 and AGC-40-R?

A: The primary differences are product status and compliance certification. BK/AGC-40 is obsolete and RoHS non-compliant. AGC-40-R is active in production and ROHS3 compliant. Functionally, both parts are equivalent.

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

A: Yes. Both BK/AGC-40 and AGC-40-R are designed for use in 3AB and 3AG holders and share identical physical dimensions of 0.250" diameter x 1.250" length (6.35mm x 31.75mm).

Q: What certifications do these fuses carry?

A: Both BK/AGC-40 and AGC-40-R are certified by CSA and UL, meeting recognized safety standards for cartridge fuses.

Q: Is AGC-40-R suitable for applications requiring RoHS compliance?

A: Yes. AGC-40-R carries ROHS3 compliance certification and is REACH unaffected, making it suitable for applications with environmental and regulatory compliance requirements.