Littelfuse 0312002.H Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0312002.H is a 2 A, 250 V AC/DC fast-blow glass cartridge fuse in 3AB/3AG package format (1/4" × 1-1/4"). This part is classified as obsolete. Due to its discontinued status, equivalent substitute parts from active product lines are necessary to maintain circuit protection functionality in applications requiring 2 A rated fuses with 250 V AC/DC voltage ratings and fast-blow response characteristics.

Substiute Parts

0312002.H

Littelfuse Inc.In Stock: 11290312002.H Datasheet

Current PartRFQ

0312002.HXP

Littelfuse Inc.In Stock: 39590312002.HXP Datasheet

DirectRFQ

0312002.MXP

Littelfuse Inc.In Stock: 88710312002.MXP Datasheet

Parametric EquivalentRFQ

0312002.VXP

LittelfuseIn Stock: 10930312002.VXP Datasheet

Parametric EquivalentRFQ

0034.5131

SCHURTER Inc.In Stock: 16900034.5131 Datasheet

MFR RecommendedRFQ

AGC-2-R

Eaton - Electronics DivisionIn Stock: 1418AGC-2-R Datasheet

Parametric EquivalentRFQ

BK-AGC-B-2-R

Eaton - Electronics DivisionIn Stock: 759BK-AGC-B-2-R Datasheet

Parametric EquivalentRFQ

BK/AGC-2-R

Eaton - Electronics DivisionIn Stock: 1555BK/AGC-2-R Datasheet

Parametric EquivalentRFQ

BK/AGC-2RR

Eaton - Electronics DivisionIn Stock: 1102BK/AGC-2RR Datasheet

Parametric EquivalentRFQ

BK/AGC-2RX

Eaton - Electronics DivisionIn Stock: 1238BK/AGC-2RX Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters:

• Current Rating: 2 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" × 1-1/4" (exact match required)
• Mounting Type: Requires Holder (exact match required)
• Operating Temperature Range: -55°C to 125°C (exact match required)

All substitute parts listed below meet these criteria. Variations in breaking capacity, melting I²t, DC cold resistance, and approval agencies do not affect functional substitutability for the specified electrical and mechanical requirements.

Parameter Comparison

Engineering Selection Recommendations

For new designs and ongoing production, select from active product status parts. The Littelfuse 0312002.HXP, 0312002.MXP, and 0312002.VXP are direct Littelfuse equivalents with active status and expanded approval certifications (CE, KC, PSE in addition to CSA and UL). These parts offer higher breaking capacity (100 A versus 35 A) while maintaining identical electrical and mechanical specifications.

The Eaton AGC series (AGC-2-R, BK-AGC-B-2-R, BK/AGC-2-R, BK/AGC-2RR, BK/AGC-2RX) are parametrically equivalent alternatives from an active manufacturer with CSA and UL certifications. All Eaton AGC variants listed are functionally interchangeable based on the specified electrical and mechanical parameters.

The SCHURTER 0034.5131 is obsolete and should not be selected for new applications despite meeting parametric requirements.

Frequently Asked Questions (FAQ)

Q: Can I substitute the obsolete 0312002.H with any of the listed parts?

A: Yes. All listed parts meet the required electrical specifications (2 A, 250 V AC/DC, fast-blow response) and mechanical package requirements (3AB/3AG, 1/4" × 1-1/4"). Physical dimensions are identical or within tolerance.

Q: What is the difference between Littelfuse 0312002.HXP, 0312002.MXP, and 0312002.VXP?

A: All three are parametrically equivalent Littelfuse parts with identical electrical and mechanical specifications. They differ in packaging (all bulk) and inventory availability. Selection among these three is based on supply chain availability.

Q: Are Eaton AGC-2-R and BK/AGC-2-R interchangeable with Littelfuse parts?

A: Yes. Both meet the specified current rating (2 A), voltage rating (250 V AC), response time (fast-blow), and package format (3AB/3AG, 1/4" × 1-1/4"). They are parametrically equivalent substitutes.

Q: Does the higher breaking capacity of substitute parts affect compatibility?

A: No. Breaking capacity is a secondary parameter that does not affect substitutability. Higher breaking capacity (100 A or 200 A versus 35 A) provides equal or greater circuit protection capability.

Q: Can I use the SCHURTER 0034.5131 as a substitute?

A: While the SCHURTER 0034.5131 meets all parametric requirements, it is classified as obsolete. For new applications, select from active product status parts.

Q: What certifications should I verify for my application?

A: The original 0312002.H carries CSA and UL certifications. Active substitutes from Littelfuse (0312002.HXP, 0312002.MXP, 0312002.VXP) include additional certifications (CE, KC, PSE). Eaton AGC variants carry CSA and UL certifications. Verify that the selected part's certifications meet your application requirements.