AGC-4-R Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The AGC-4-R is a 4 A, 250 V AC/DC fast-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This component is classified as an active product and requires a 3AB or 3AG fuse holder for installation. The fuse operates across a temperature range of -55°C to 125°C and is approved by CSA and UL standards. Equivalent and substitute parts are necessary when the primary part number is unavailable, when alternative manufacturers are preferred for supply chain optimization, or when design flexibility permits selection from multiple qualified sources meeting identical electrical and mechanical specifications.

Substiute Parts

AGC-4-R

Eaton - Electronics DivisionIn Stock: 745AGC-4-R Datasheet

Current PartRFQ

BK/AGC-4-R

Eaton - Electronics DivisionIn Stock: 2345BK/AGC-4-R Datasheet

DirectRFQ

BK/AGC-4AX

Eaton - Electronics DivisionIn Stock: 876BK/AGC-4AX Datasheet

Parametric EquivalentRFQ

0001.1030

SCHURTER Inc.In Stock: 12550001.1030 Datasheet

SimilarRFQ

0034.5138

SCHURTER Inc.In Stock: 8700034.5138 Datasheet

SimilarRFQ

0312004.VXP

Littelfuse Inc.In Stock: 11210312004.VXP Datasheet

SimilarRFQ

0312004.HXP

Littelfuse Inc.In Stock: 38230312004.HXP Datasheet

Parametric EquivalentRFQ

0312004.MXP

Littelfuse Inc.In Stock: 21100312004.MXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AGC-4-R are classified based on strict electrical and mechanical parameter alignment. All substitute candidates must satisfy the following criteria to ensure direct interchangeability:

Critical Parameters for Substitution:

• Current Rating: 4 A (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)
• Size / Dimension: 0.250" Dia x 1.250" L (exact match required)
• Breaking Capacity @ Rated Voltage: 200A (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)

Substitute Categories:

Direct Manufacturer Equivalents (Eaton - Electronics Division): BK/AGC-4-R and BK/AGC-4AX are direct equivalents from the same manufacturer, sharing identical electrical specifications and mechanical dimensions.

Parametric Equivalents (Littelfuse Inc.): 0312004.MXP, 0312004.VXP, and 0312004.HXP meet all critical electrical and mechanical parameters. These parts are from the 312 series and provide full functional equivalence.

Similar Parts (SCHURTER Inc.): 0001.1030 and 0034.5138 match the core electrical specifications and package dimensions but carry obsolete product status and different approval agency certifications. These are listed for reference only and should be evaluated against current design requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement):

BK/AGC-4-R and BK/AGC-4AX are direct equivalents manufactured by Eaton - Electronics Division. Both parts are active products with identical electrical specifications, mechanical dimensions, and approval certifications (CSA, UL) to the AGC-4-R. Selection between these three Eaton variants is based on availability and supply chain requirements.

Secondary Substitutes (Parametric Equivalents):

0312004.MXP, 0312004.VXP, and 0312004.HXP are manufactured by Littelfuse Inc. and meet all critical electrical and mechanical parameters. These parts are active products with expanded approval certifications (CE, CSA, KC, PSE, UL) and provide full functional equivalence. The Littelfuse 312 series parts are suitable for applications requiring multi-regional compliance documentation.

Reference Parts (Not Recommended for New Designs):

0001.1030 and 0034.5138 are obsolete products from SCHURTER Inc. While these parts match the core electrical specifications and package dimensions, their obsolete status and limited approval certifications make them unsuitable for new designs or long-term supply chain planning. These parts are listed for reference in legacy system documentation only.

Frequently Asked Questions (FAQ)

Q: Can BK/AGC-4-R be used as a direct replacement for AGC-4-R?

A: Yes. BK/AGC-4-R is a direct equivalent manufactured by Eaton - Electronics Division with identical current rating (4 A), voltage rating (250 V AC), fuse type (cartridge, glass), response time (fast blow), package designation (3AB, 3AG), physical dimensions (0.250" Dia x 1.250" L), breaking capacity (200A), and operating temperature range (-55°C to 125°C). Both parts carry CSA and UL approvals.

Q: Are Littelfuse 312 series parts (0312004.MXP, 0312004.VXP, 0312004.HXP) compatible with AGC-4-R applications?

A: Yes. All three Littelfuse parts meet the critical electrical and mechanical parameters required for substitution: 4 A current rating, 250 V AC voltage rating, fast-blow response, 3AB/3AG package, 0.250" Dia x 1.250" L dimensions, and 200A breaking capacity. These parts are active products with expanded approval certifications including CE, CSA, KC, PSE, and UL.

Q: What is the difference between 0312004.MXP, 0312004.VXP, and 0312004.HXP?

A: All three parts are from the Littelfuse 312 series and share identical electrical specifications, mechanical dimensions, and approval certifications. Selection between these variants is based on availability and internal Littelfuse product line differentiation. From an engineering substitution perspective, they are functionally equivalent.

Q: Why are SCHURTER parts 0001.1030 and 0034.5138 listed as reference only?

A: Both SCHURTER parts carry obsolete product status. While 0034.5138 matches the AGC-4-R in breaking capacity (200A) and operating temperature range (-55°C to 125°C), and 0001.1030 meets the core electrical specifications, their obsolete classification indicates discontinued manufacturing and limited availability. New designs should not rely on these parts for long-term supply chain continuity.

Q: Are there any differences in DC cold resistance between the AGC-4-R and Littelfuse substitutes?

A: The AGC-4-R specifies 0.024 Ohms DC cold resistance, while Littelfuse 312 series parts (0312004.MXP, 0312004.VXP, 0312004.HXP) specify 0.0293 Ohms. This difference is within acceptable tolerance for cartridge fuse applications and does not affect functional interchangeability in standard circuit protection applications.

Q: What holder types are required for these fuse cartridges?

A: All listed parts require a 3AB or 3AG fuse holder. The physical dimensions (0.250" Dia x 1.250" L or 6.35mm x 31.75mm) are standardized across all substitutes, ensuring mechanical compatibility with existing holder installations.

Q: Can AGC-4-R be used in applications requiring DC voltage?

A: The AGC-4-R is rated for 250 V AC. The detailed description indicates "4 A 250 V AC DC," which refers to the fuse's capability to interrupt both AC and DC circuits at the specified voltage rating. Consult application-specific requirements and holder specifications for DC circuit applications.

Q: Which substitute offers the broadest international compliance?

A: The Littelfuse 312 series parts (0312004.MXP, 0312004.VXP, 0312004.HXP) carry the most comprehensive approval certifications: CE, CSA, KC, PSE, and UL. These certifications support applications requiring multi-regional compliance documentation.