Littelfuse 031301.6VXP Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 031301.6VXP is a 1.6 A, 250 V AC glass cartridge fuse with slow-blow response characteristics, designed for 3AB and 3AG holder applications. This component is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, and holder compatibility to ensure direct interchangeability in circuit protection applications.

Substiute Parts

031301.6VXP

Littelfuse Inc.In Stock: 816031301.6VXP Datasheet

Current PartRFQ

031301.6HXP

Littelfuse Inc.In Stock: 866031301.6HXP Datasheet

Parametric EquivalentRFQ

031301.6MXP

Littelfuse Inc.In Stock: 1782031301.6MXP Datasheet

Parametric EquivalentRFQ

0001.2526

SCHURTER Inc.In Stock: 15500001.2526 Datasheet

MFR RecommendedRFQ

BK/MDQ-1-6/10

Eaton - Electronics DivisionIn Stock: 1193BK/MDQ-1-6/10 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 031301.6VXP are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalents (Direct Interchangeability): Parts 031301.6HXP and 031301.6MXP are manufactured by Littelfuse Inc. and share identical electrical ratings (1.6 A, 250 V AC), response characteristics (Slow Blow), mechanical dimensions (0.250" Dia x 1.250" L), holder compatibility (3AB, 3AG), breaking capacity (100A), melting I²t (49.6), DC cold resistance (0.171 Ohms), operating temperature range (-55°C ~ 125°C), and regulatory approvals (CE, CSA, PSE, UL). These parts differ only in internal construction or manufacturing process designation and are fully interchangeable.

Manufacturer Recommended Substitutes: Parts 0001.2526 (SCHURTER Inc.) and BK/MDQ-1-6/10 (Eaton - Electronics Division) are approved alternatives that maintain the core electrical specifications (1.6 A, 250 V AC) and mechanical package (3AB, 3AG, 1/4" x 1-1/4"). These parts are selected based on matching current rating, AC voltage rating, fuse type (Cartridge, Glass), response time (Slow Blow), and holder compatibility. Differences in breaking capacity, melting I²t, DC voltage rating, and operating temperature range are noted in the parameter comparison table.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: Parts 031301.6HXP and 031301.6MXP are recommended as primary substitutes. Both maintain identical electrical specifications, mechanical dimensions, and regulatory certifications (CE, CSA, PSE, UL) with ROHS3 compliance. Selection between these Littelfuse variants depends on availability and internal manufacturing process requirements.

For Extended Temperature Range Applications: The 031301.6VXP operates across -55°C to 125°C. The SCHURTER 0001.2526 operates within -40°C to 85°C, which is a narrower range. Applications requiring the full -55°C to 125°C operating window should prioritize Littelfuse variants (031301.6VXP, 031301.6HXP, or 031301.6MXP).

For DC Circuit Applications: The SCHURTER 0001.2526 includes a 63 V DC rating, making it suitable for mixed AC/DC applications. The Littelfuse 031301.6VXP and equivalents do not specify DC voltage ratings and should be evaluated for DC circuit suitability based on application requirements.

For Regulatory Compliance: The Littelfuse 313 series (031301.6VXP, 031301.6HXP, 031301.6MXP) carries CE, CSA, PSE, and UL approvals with ROHS3 compliance. The SCHURTER 0001.2526 carries cURus approval with ROHS3 compliance. The Eaton BK/MDQ-1-6/10 is RoHS non-compliant and should not be used in applications requiring RoHS compliance.

Frequently Asked Questions (FAQ)

Q: Can 031301.6HXP and 031301.6MXP be used interchangeably with 031301.6VXP?

A: Yes. Both parts are parametric equivalents manufactured by Littelfuse Inc. with identical electrical ratings (1.6 A, 250 V AC), response characteristics (Slow Blow), mechanical dimensions (0.250" Dia x 1.250" L), holder compatibility (3AB, 3AG), and regulatory approvals (CE, CSA, PSE, UL). They differ only in internal construction designation.

Q: What are the key differences between Littelfuse and SCHURTER substitutes?

A: The SCHURTER 0001.2526 includes a 63 V DC rating and cURus approval, whereas Littelfuse variants specify CE, CSA, PSE, and UL approvals. The SCHURTER part has a narrower operating temperature range (-40°C to 85°C versus -55°C to 125°C) and lower melting I²t (4.2 versus 49.6). Both maintain the same 1.6 A, 250 V AC core specifications and 3AB, 3AG holder compatibility.

Q: Is the Eaton BK/MDQ-1-6/10 suitable for new designs?

A: The Eaton BK/MDQ-1-6/10 is RoHS non-compliant, making it unsuitable for applications requiring RoHS compliance. It maintains the same 1.6 A, 250 V AC rating and 3AB, 3AG holder compatibility but lacks specified breaking capacity, melting I²t, and operating temperature data. Use only in legacy systems where RoHS compliance is not required.

Q: Are all substitute parts compatible with 3AB and 3AG holders?

A: Yes. All listed substitute parts (031301.6HXP, 031301.6MXP, 0001.2526, and BK/MDQ-1-6/10) are specified for 3AB and 3AG holder compatibility with mechanical dimensions of 0.250" Dia x 1.250" L (or 1.252" L for SCHURTER). Physical installation compatibility is confirmed across all substitutes.

Q: What is the significance of melting I²t values in fuse selection?

A: Melting I²t determines the thermal energy required to melt the fuse element and is critical for circuit protection coordination. The Littelfuse 313 series (031301.6VXP, 031301.6HXP, 031301.6MXP) have a melting I²t of 49.6, while the SCHURTER 0001.2526 has 4.2. These differences affect protection characteristics and must be evaluated against circuit requirements.

Q: Can the 031301.6VXP be used in DC circuits?

A: The 031301.6VXP does not specify a DC voltage rating. For DC circuit applications, the SCHURTER 0001.2526 with 63 V DC rating is recommended. Consult application-specific requirements before selecting a fuse for DC use.