Littelfuse 0235.300H Glass Cartridge Fuse 300mA 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The Littelfuse 0235.300H is a 300mA 250VAC fast-blow glass cartridge fuse in 5x20mm form factor, designed for circuit protection in AC and DC applications. This part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications. Substitute parts must preserve the 300mA current rating, 250V voltage rating, fast-blow response characteristic, and 5x20mm physical dimensions to ensure direct functional replacement without circuit redesign.

Substiute Parts

0235.300H

Littelfuse Inc.In Stock: 8530235.300H Datasheet

Current PartRFQ

0235.300HXP

Littelfuse Inc.In Stock: 10230235.300HXP Datasheet

Parametric EquivalentRFQ

0235.300MXP

Littelfuse Inc.In Stock: 16000235.300MXP Datasheet

Parametric EquivalentRFQ

0235.300VXP

Littelfuse Inc.In Stock: 7270235.300VXP Datasheet

Parametric EquivalentRFQ

BK/GMA-300-R

Eaton - Electronics DivisionIn Stock: 1541BK/GMA-300-R Datasheet

MFR RecommendedRFQ

BK1/GMA-300-R

Eaton - Electronics DivisionIn Stock: 821BK1/GMA-300-R Datasheet

MFR RecommendedRFQ

GMA-300-R

Eaton - Electronics DivisionIn Stock: 840GMA-300-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 0235.300H is determined by strict equivalence across the following parameters: current rating (300mA), voltage rating (250V AC), fuse type (cartridge glass), response characteristic (fast blow), physical dimensions (5x20mm), and breaking capacity (35A). All substitute parts listed maintain these core electrical and mechanical specifications.

Littelfuse parametric equivalents (0235.300HXP, 0235.300MXP, 0235.300VXP) are direct replacements with identical ratings and form factor, differing only in packaging configuration and compliance certifications. Eaton GMA series parts (BK/GMA-300-R, BK1/GMA-300-R, GMA-300-R) are manufacturer-recommended alternatives from a different supplier, maintaining all critical electrical parameters and physical dimensions while offering active product status and current availability.

Parameter Comparison

Engineering Selection Recommendations

For applications requiring direct replacement of the obsolete 0235.300H, the Littelfuse 0235.300HXP, 0235.300MXP, and 0235.300VXP provide parametric equivalence with active product status. These parts maintain identical electrical ratings and physical form factor while offering enhanced compliance certifications (ROHS3, CE, KC/K-MARK) and current manufacturing availability.

The Eaton GMA series alternatives (BK/GMA-300-R, BK1/GMA-300-R, GMA-300-R) are manufacturer-recommended substitutes offering active status and full compliance certifications (CSA, PSE, UL, RoHS). These parts maintain all critical electrical and mechanical parameters required for direct circuit substitution.

Selection between Littelfuse and Eaton alternatives depends on supply chain requirements, compliance certifications needed for the target application, and inventory availability. All listed substitutes are electrically and mechanically interchangeable with the 0235.300H within the specified parameters.

Frequently Asked Questions (FAQ)

Q: Can the 0235.300HXP, 0235.300MXP, and 0235.300VXP be used interchangeably with the 0235.300H?

A: Yes. These Littelfuse parts maintain identical current rating (300mA), voltage rating (250V AC), response characteristic (fast blow), and physical dimensions (5x20mm). All three are direct functional replacements for the obsolete 0235.300H.

Q: What is the difference between 0235.300HXP, 0235.300MXP, and 0235.300VXP?

A: These parts are parametrically equivalent with identical electrical specifications. Differences exist in packaging configuration (all bulk), approval agency certifications, and melting I²t values (0.03215 for HXP/MXP/VXP versus 0.033 for the original). All three are suitable for direct substitution.

Q: Are the Eaton GMA series fuses compatible with the 0235.300H?

A: Yes. The BK/GMA-300-R, BK1/GMA-300-R, and GMA-300-R maintain the same current rating (300mA), voltage rating (250V AC), response time (fast blow), and 5x20mm form factor. These are manufacturer-recommended alternatives from Eaton.

Q: What certifications should I verify for my application?

A: The original 0235.300H carries CSA and UL approvals. Littelfuse substitutes add CE and KC/K-MARK certifications. Eaton alternatives carry CSA, PSE, and UL approvals. Verify that the selected substitute meets all regulatory requirements for your target market and application.

Q: Does the fuse holder compatibility change between these parts?

A: No. All listed parts require a holder and maintain the 5x20mm physical dimensions. Existing fuse holders designed for the 0235.300H are compatible with all substitute parts listed.

Q: What is the significance of the melting I²t value differences?

A: The melting I²t value characterizes the thermal energy required to melt the fuse element. The original 0235.300H specifies 0.033, while Littelfuse substitutes specify 0.03215, and Eaton alternatives specify 0.019. These variations remain within the fast-blow classification and do not affect functional interchangeability for standard circuit protection applications.