3AG 375 Fuse Cartridge - Equivalent & Substitute Parts

Part Overview

The 3AG 375 is a 375 mA, 250 V AC/DC fast-blow glass fuse cartridge manufactured by Bel Fuse Inc. This component is classified as obsolete, requiring identification of active equivalent parts for continued system support and procurement. The 3AG form factor (1/4" x 1-1/4") with 3AB, 3AG holder compatibility remains a standard industrial fuse package. Substitute parts must maintain identical electrical ratings, mechanical dimensions, and holder compatibility to ensure direct replacement without circuit modification.

Substiute Parts

3AG 375

Bel Fuse Inc.In Stock: 7563AG 375 Datasheet

Current PartRFQ

0312.375HXP

Littelfuse Inc.In Stock: 11320312.375HXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3AG 375 is determined by the following mandatory parameters:

• Current Rating: 375 mA (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Response Time: Fast Blow (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (minimum requirement)

The substitute part 0312.375HXP (Littelfuse Inc., Series 312) meets all mandatory electrical and mechanical parameters. Both parts are glass cartridge fuses with identical current, voltage, and response characteristics, compatible with standard 3AB/3AG holders.

Parameter Comparison

Engineering Selection Recommendations

The 0312.375HXP (Littelfuse Inc.) is the direct substitute for the obsolete 3AG 375. Both parts share identical electrical specifications (375 mA, 250 V AC, fast-blow response) and mechanical compatibility with 3AB/3AG holders. The substitute part is currently in active production status, ensuring long-term availability and supply chain continuity.

The 0312.375HXP carries ROHS3 compliance, whereas the original 3AG 375 is RoHS non-compliant. Both parts maintain CE, CSA, and UL certifications. The dimensional variance (0.002" length difference) is within standard manufacturing tolerance and does not affect holder compatibility or electrical performance.

Frequently Asked Questions (FAQ)

Q: Can the 0312.375HXP replace the 3AG 375 in existing circuits?

A: Yes. Both parts are rated 375 mA, 250 V AC, fast-blow glass cartridge fuses with identical 3AB/3AG holder compatibility. No circuit modification is required.

Q: What is the significance of the RoHS compliance difference?

A: The 0312.375HXP is ROHS3 compliant, meeting current environmental regulations for new equipment designs. The original 3AG 375 is non-compliant. For systems requiring RoHS compliance, the substitute is the appropriate selection.

Q: Are there dimensional differences between these parts?

A: The 0312.375HXP measures 0.250" Dia x 1.250" L, compared to the 3AG 375 at 0.250" Dia x 1.252" L. The 0.002" length difference is within standard tolerance and does not affect mechanical fit in standard 3AB/3AG holders.

Q: What certifications apply to the substitute part?

A: The 0312.375HXP carries CE, CSA, and UL approvals. The original part includes PSE certification in addition to these agencies. Both parts meet industrial safety standards for fuse cartridges.

Q: Why is the original 3AG 375 listed as obsolete?

A: Bel Fuse Inc. has discontinued this part number. The Littelfuse 0312.375HXP provides equivalent functionality with active production status and improved compliance characteristics.