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

Part Overview

The BK/AGC-3YY-R 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 dimensions of 1/4" x 1-1/4" (6.35mm x 31.75mm). The part maintains active product status and is currently in stock with 983 pieces available.

Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, response characteristics, and approval certifications. These alternatives provide direct functional replacement capability while maintaining circuit protection performance.

Substiute Parts

BK/AGC-3YY-R

Eaton - Electronics DivisionIn Stock: 1051BK/AGC-3YY-R 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

Parametric EquivalentRFQ

0312003.MXP

Littelfuse Inc.In Stock: 123840312003.MXP Datasheet

Parametric EquivalentRFQ

0312003.VXP

Littelfuse Inc.In Stock: 7420312003.VXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/AGC-3YY-R is determined by the following critical parameters:

Electrical Compatibility:

• Current Rating: 3 A (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Response Time: Fast Blow (exact match required)

Mechanical Compatibility:

• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
• Size / Dimension: 0.250" Dia x 1.250" L (exact match required)
• Mounting Type: Requires Holder (exact match required)

Functional Compatibility:

• Fuse Type: Cartridge, Glass (exact match required)
• Breaking Capacity @ Rated Voltage: 100 A (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)

All identified substitute parts meet these criteria. Variations in melting I²t values and DC cold resistance do not affect substitution eligibility, as these parameters remain within acceptable operational ranges for the specified application.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts are active products with current manufacturing status. Selection among equivalent options is based on availability, compliance certifications, and supply chain considerations.

Eaton - Electronics Division Options:

• AGC-3-R and BK/AGC-3-R are direct Eaton equivalents with identical electrical and mechanical specifications to the BK/AGC-3YY-R. Both parts carry CSA and UL approvals. BK/AGC-3-R offers higher inventory availability (6,557 pieces) compared to AGC-3-R (848 pieces).

Littelfuse Inc. Options:

• 0312003.HXP, 0312003.MXP, and 0312003.VXP are functionally equivalent alternatives from Littelfuse. These parts carry expanded approval certifications including CE, CSA, KC, PSE, and UL. The 0312003.MXP variant provides the highest inventory level (12,307 pieces) among all substitute options.

All substitute parts maintain the same operating temperature range, breaking capacity, and mechanical dimensions. Littelfuse variants include RoHS3 compliance and REACH unaffected status documentation.

Frequently Asked Questions (FAQ)

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

A: Yes. AGC-3-R meets all electrical, mechanical, and functional requirements. Both parts are manufactured by Eaton - Electronics Division with identical current rating (3 A), voltage rating (250 V AC), response time (Fast Blow), package dimensions (3AB, 3AG, 1/4" x 1-1/4"), and approval certifications (CSA, UL).

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

A: Eaton options (AGC-3-R, BK/AGC-3-R) and Littelfuse options (0312003.HXP, 0312003.MXP, 0312003.VXP) are electrically and mechanically equivalent. Littelfuse variants carry additional international approvals (CE, KC, PSE) and include RoHS3 compliance documentation. All parts function identically in 3AB and 3AG fuse holders.

Q: Are there any compatibility issues when substituting between manufacturers?

A: No. All substitute parts share identical mechanical dimensions (0.250" Dia x 1.250" L), package specifications (3AB, 3AG), and electrical ratings. Physical installation in existing fuse holders and circuit protection performance remain unchanged.

Q: What does "Requires Holder" mean for mounting type?

A: These fuse cartridges are not standalone components. They must be installed in a compatible 3AB or 3AG fuse holder. The holder provides electrical contact and mechanical retention. All substitute parts require the same holder type as the original BK/AGC-3YY-R.

Q: Do all substitute parts have the same breaking capacity?

A: Yes. All substitute parts maintain a breaking capacity of 100 A at rated voltage (250 V AC). This specification is identical across all Eaton and Littelfuse options.

Q: Which substitute part offers the best availability?

A: 0312003.MXP (Littelfuse Inc.) provides the highest inventory level with 12,307 pieces in stock. BK/AGC-3-R (Eaton) offers 6,557 pieces. Both options ensure supply continuity for high-volume applications.

Q: Are there temperature range differences between substitute options?

A: No. All substitute parts operate across the identical temperature range of -55°C to 125°C. Operating temperature specifications are consistent across all Eaton and Littelfuse variants.