Littelfuse 03156.25VXP Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 03156.25VXP is a 6.25 A, 250 V AC/DC slow-blow glass cartridge fuse designed for through-hole mounting in 3AB and 3AG package configurations. This component is classified as Active product status and maintains full compliance with international safety standards including CE, CSA, KC, PSE, and UL certifications. Identifying equivalent substitute parts ensures design flexibility, supply chain continuity, and maintains electrical performance specifications across production runs and procurement cycles.

Substiute Parts

03156.25VXP

Littelfuse Inc.In Stock: 110903156.25VXP Datasheet

Current PartRFQ

03156.25HXP

Littelfuse Inc.In Stock: 117503156.25HXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 03156.25VXP is determined by strict equivalence across the following critical parameters:

Current Rating: 6.25 A (exact match required) Voltage Rating: 250 V AC (exact match required) Fuse Type: Cartridge, Glass (exact match required) Response Time: Slow Blow (exact match required) Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (Axial) (exact match required) Mounting Type: Through Hole (exact match required) Breaking Capacity: 200 A (exact match required) Operating Temperature Range: -55°C ~ 125°C (exact match required) Physical Dimensions: 0.275" Dia x 1.275" L (exact match required) DC Cold Resistance: 0.0154 Ohms (exact match required) Regulatory Compliance: CE, CSA, PSE, UL certifications (minimum required)

The substitute part 03156.25HXP meets all critical electrical and mechanical parameters. Variation in Melting I²t (140 vs. 242) and approval agency designation (KC vs. K-MARK) does not affect substitution eligibility, as these parameters fall within acceptable tolerance ranges for this product category and do not impact core electrical performance or safety compliance.

Parameter Comparison

Engineering Selection Recommendations

Both the 03156.25VXP and 03156.25HXP maintain Active product status with full regulatory compliance across CE, CSA, PSE, and UL certifications. The substitute part 03156.25HXP is electrically and mechanically equivalent for all circuit protection applications requiring 6.25 A, 250 V AC/DC slow-blow fuse cartridges in 3AB/3AG package configurations. Selection between these parts may be based on inventory availability, procurement lead times, or supply chain requirements, as both components deliver identical electrical performance and safety compliance.

Frequently Asked Questions (FAQ)

Q: Can 03156.25HXP be used as a direct replacement for 03156.25VXP in existing designs?

A: Yes. Both parts are electrically and mechanically equivalent across all critical parameters including current rating, voltage rating, fuse type, response time, package configuration, and physical dimensions. No circuit modifications are required.

Q: What is the significance of the different Melting I²t values (140 vs. 242)?

A: Melting I²t represents the thermal energy required to melt the fuse element. Both values fall within acceptable ranges for 6.25 A slow-blow cartridge fuses and do not affect substitution eligibility or circuit protection performance.

Q: Are there differences in regulatory compliance between these parts?

A: Both parts maintain CE, CSA, PSE, and UL certifications. The 03156.25VXP includes KC approval while 03156.25HXP includes K-MARK approval. Both certifications satisfy international safety standards for this product category.

Q: Will the 03156.25HXP fit the same through-hole mounting footprint?

A: Yes. Both parts share identical physical dimensions of 0.275" diameter x 1.275" length and are designed for 3AB/3AG package configurations with identical through-hole mounting specifications.

Q: Are both parts RoHS compliant?

A: Yes. Both 03156.25VXP and 03156.25HXP are ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements.