Littelfuse 0312005.MXP Glass Cartridge Fuse 5A 250VAC Equivalent & Substitute Parts

Part Overview

The Littelfuse 0312005.MXP is a 5A 250VAC fast-blow glass cartridge fuse in the 3AB/3AG package format (1/4" x 1-1/4"). This component is actively produced and widely used in circuit protection applications requiring fast response characteristics. Equivalent and substitute parts are necessary when the primary part is unavailable, when alternative sourcing is required for cost optimization, or when design flexibility across approved manufacturers is needed while maintaining identical electrical and mechanical specifications.

Substiute Parts

0312005.MXP

Littelfuse Inc.In Stock: 87340312005.MXP Datasheet

Current PartRFQ

0312005.HXP

Littelfuse Inc.In Stock: 39270312005.HXP Datasheet

DirectRFQ

0001.1031

SCHURTER Inc.In Stock: 9910001.1031 Datasheet

MFR RecommendedRFQ

3AG 5-R

Bel Fuse Inc.In Stock: 40763AG 5-R Datasheet

MFR RecommendedRFQ

BK/AGC-5-R

Eaton - Electronics DivisionIn Stock: 1087BK/AGC-5-R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Littelfuse 0312005.MXP is determined by strict equivalence across the following critical parameters:

• Current Rating: 5 A (exact match required)
• Voltage Rating: 250 V AC (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)
• Physical Dimensions: 0.250" Dia x 1.250" L nominal (tolerance within 0.002" acceptable)

All substitute parts listed maintain these core electrical and mechanical specifications. Variations in secondary parameters such as melting I²t, breaking capacity, and DC cold resistance do not preclude substitution when primary parameters align.

Parameter Comparison

Engineering Selection Recommendations

0312005.HXP (Littelfuse): Direct equivalent from the same manufacturer and series. Identical electrical and mechanical specifications. Active product status with 3,869 units in stock. Recommended for seamless substitution.

3AG 5-R (Bel Fuse): Meets all critical electrical and mechanical parameters. Active product status. Approval agencies include CE, CSA, cURus, and PSE. Suitable for applications requiring multi-source qualification.

BK/AGC-5-R (Eaton - Electronics Division): Meets all critical electrical and mechanical parameters. Active product status with CSA and UL approvals. Suitable for applications requiring Eaton component sourcing.

0001.1031 (SCHURTER): Meets all critical electrical and mechanical parameters but carries obsolete product status. Operating temperature range is restricted to -40°C ~ 85°C compared to -55°C ~ 125°C for active alternatives. Use only when legacy system compatibility is required and no active alternatives are available.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts interchangeably with the Littelfuse 0312005.MXP?

A: Yes, all listed substitute parts meet the critical electrical and mechanical specifications: 5A current rating, 250V AC voltage rating, fast-blow response, and 3AB/3AG package format with 1/4" x 1-1/4" dimensions. Physical dimensions are within acceptable tolerance. All are ROHS3 compliant.

Q: What is the difference between the Littelfuse 0312005.MXP and 0312005.HXP?

A: Both parts are identical in electrical and mechanical specifications and are from the same manufacturer series. The 0312005.HXP is a direct equivalent with the same performance characteristics.

Q: Why is the SCHURTER 0001.1031 marked as obsolete?

A: The SCHURTER 0001.1031 carries obsolete product status, indicating it is no longer in active production. While it meets the core electrical and mechanical requirements, active alternatives from Littelfuse, Bel Fuse, and Eaton are preferred for new designs and ongoing sourcing.

Q: Are there any temperature range limitations I should consider?

A: The SCHURTER 0001.1031 operates within -40°C ~ 85°C, which is narrower than the -55°C ~ 125°C range of other substitutes. For applications requiring the full -55°C ~ 125°C operating range, use Littelfuse 0312005.MXP, 0312005.HXP, Bel Fuse 3AG 5-R, or Eaton BK/AGC-5-R.

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

A: No. The SCHURTER 0001.1031 has a breaking capacity of 1.5kA, while Littelfuse, Bel Fuse, and Eaton parts have 200A breaking capacity. For applications requiring higher breaking capacity, the SCHURTER part provides additional margin, though all meet the rated voltage specification.

Q: Which substitute part should I choose for a new design?

A: For new designs, select from active products: Littelfuse 0312005.HXP, Bel Fuse 3AG 5-R, or Eaton BK/AGC-5-R. All three offer full -55°C ~ 125°C operating range and current production status. Selection may be based on existing supplier relationships, approval agency requirements, or cost considerations.