Equivalent & Substitute Parts for BK/AGC-9 Glass Cartridge Fuse

Part Overview

The BK/AGC-9 is a 9 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 and operates across a temperature range of -55°C to 125°C. The part is currently classified as obsolete, which necessitates identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for continued system support and component replacement.

Substiute Parts

BK/AGC-9

Eaton - Electronics DivisionIn Stock: 931BK/AGC-9 Datasheet

Current PartRFQ

AGC-9-R

Eaton - Electronics DivisionIn Stock: 885AGC-9-R Datasheet

DirectRFQ

BK/AGC-9-R

Eaton - Electronics DivisionIn Stock: 1891BK/AGC-9-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BK/AGC-9 glass cartridge fuse is determined by strict equivalence across all electrical and mechanical parameters. The following criteria establish valid substitutes:

Critical Matching Parameters:

• Current Rating: 9 A
• Voltage Rating (AC): 250 V
• Fuse Type: Cartridge, Glass
• Response Time: Fast Blow
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4"
• Physical Dimensions: 0.250" Dia x 1.250" L
• Breaking Capacity: 200 A
• Melting I²t: 395.28
• DC Cold Resistance: 0.009 Ohms
• Operating Temperature Range: -55°C ~ 125°C
• Approval Agencies: CSA, UL

The substitute parts AGC-9-R and BK/AGC-9-R maintain complete electrical and mechanical equivalence to the main part number BK/AGC-9. Both substitutes are manufactured by Eaton - Electronics Division and share identical specifications across all parameters listed above. The primary distinction between the main part and substitutes is product status: BK/AGC-9 is obsolete, while AGC-9-R and BK/AGC-9-R are active products.

Parameter Comparison

Engineering Selection Recommendations

Both AGC-9-R and BK/AGC-9-R are direct functional equivalents to the obsolete BK/AGC-9 fuse. Selection between the two active substitutes should be based on the following factors:

RoHS Compliance: BK/AGC-9-R carries ROHS3 compliance status, while AGC-9-R carries RoHS Compliant status. Systems requiring ROHS3 certification should specify BK/AGC-9-R.

Inventory Availability: BK/AGC-9-R maintains higher inventory levels (1808 Pcs) compared to AGC-9-R (861 Pcs), supporting extended supply chain requirements.

Packaging: Both substitutes are supplied in bulk packaging. Selection should align with procurement and assembly workflow requirements.

All three part numbers maintain identical electrical performance, mechanical fit, and thermal operating characteristics. The choice between AGC-9-R and BK/AGC-9-R is determined by regulatory compliance requirements and supply chain considerations rather than technical performance differences.

Frequently Asked Questions (FAQ)

Q: Can AGC-9-R and BK/AGC-9-R be used interchangeably with BK/AGC-9?

A: Yes. Both AGC-9-R and BK/AGC-9-R are electrically and mechanically equivalent to BK/AGC-9. All three part numbers share identical current ratings (9 A), voltage ratings (250 V AC), fuse type (cartridge glass), response time (fast blow), physical dimensions (0.250" Dia x 1.250" L), and approval certifications (CSA, UL).

Q: What is the primary reason for substituting BK/AGC-9?

A: BK/AGC-9 is classified as obsolete. AGC-9-R and BK/AGC-9-R are active products from the same manufacturer that provide identical functionality and specifications, ensuring continued availability for system maintenance and component replacement.

Q: Are there any differences in holder compatibility?

A: No. All three part numbers require 3AB and 3AG holders. The physical dimensions (0.250" Dia x 1.250" L) are identical, ensuring direct mechanical compatibility with existing holder installations.

Q: What is the difference between AGC-9-R and BK/AGC-9-R?

A: Both parts are electrically and mechanically identical. The primary differences are RoHS compliance status (AGC-9-R is RoHS Compliant; BK/AGC-9-R is ROHS3 Compliant) and inventory availability (BK/AGC-9-R has higher stock levels). Selection should be based on regulatory requirements and supply chain needs.

Q: Do these fuses require any special installation procedures?

A: No special procedures are required. All three part numbers are cartridge glass fuses that require installation in compatible 3AB or 3AG holders. Installation follows standard fuse holder procedures.

Q: Are the thermal operating ranges identical?

A: Yes. All three part numbers operate across the same temperature range: -55°C to 125°C.