GSC1 5X20MM Fuse 250V 1A Equivalent & Substitute Parts

Part Overview

The GSC1 is a 5X20MM fuse rated at 250V, 1A, manufactured by Mersen USA Newburyport-MA L.L.C. This cartridge fuse is designed for circuit protection in applications requiring slow-blow response characteristics. The part is currently active in production with ROHS3 compliance and maintains 922 units in new original stock. Equivalent substitute parts are necessary when primary sourcing is unavailable, when managing supply chain redundancy, or when design flexibility permits component standardization across manufacturing facilities.

Substiute Parts

GSC1

Mersen USA Newburyport-MA L.L.C.In Stock: 993GSC1 Datasheet

Current PartRFQ

0239001.HXP

Littelfuse Inc.In Stock: 8910239001.HXP Datasheet

SimilarRFQ

0239001.MXP

Littelfuse Inc.In Stock: 10510239001.MXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the GSC1 is determined by strict equivalence across the following parameters: current rating (1 A), voltage rating (250 V AC), physical package dimensions (5mm x 20mm), fuse type (cartridge glass), and response time (slow blow). Both identified substitute parts—0239001.HXP and 0239001.MXP, both manufactured by Littelfuse Inc.—meet all these criteria. These substitutes are functionally equivalent and mechanically compatible, requiring the same holder configuration. Substitution does not alter circuit protection performance or installation methodology.

Parameter Comparison

Engineering Selection Recommendations

All three parts—GSC1, 0239001.HXP, and 0239001.MXP—maintain active production status and ROHS3 compliance. The Littelfuse substitutes provide documented breaking capacity (35 A) and melting I²t values (11.295), supporting precise circuit protection analysis. Both substitute parts carry multiple approval agencies (CE, CSA, KC, PSE, UL) and maintain REACH unaffected status. Selection between GSC1 and either Littelfuse substitute is determined by availability and supply chain requirements, as all three parts are electrically and mechanically equivalent for the specified 1 A, 250 V application in a 5mm x 20mm form factor.

Frequently Asked Questions (FAQ)

Q: Can 0239001.HXP and 0239001.MXP be used interchangeably with GSC1? A: Yes. Both Littelfuse parts are direct equivalents, matching the 1 A current rating, 250 V voltage rating, 5mm x 20mm package, slow-blow response, and cartridge glass fuse type. No circuit modifications are required.

Q: What is the difference between 0239001.HXP and 0239001.MXP? A: Both parts are identical in electrical and mechanical specifications. The difference lies in packaging (both bulk) and inventory levels (835 units vs. 1020 units). Selection is based on supply availability.

Q: Do these fuses require a specific holder? A: Yes. All three parts require a fuse holder designed for 5mm x 20mm cartridge fuses. The holder must be rated for 250 V operation.

Q: Are all parts RoHS compliant? A: Yes. GSC1, 0239001.HXP, and 0239001.MXP are all ROHS3 compliant.

Q: What certifications apply to the substitute parts? A: The Littelfuse substitutes carry CE, CSA, KC, PSE, and UL approvals, supporting global regulatory requirements.

Q: Can these fuses operate outside the -55°C to 125°C range? A: The documented operating temperature range for the Littelfuse substitutes is -55°C to 125°C. GSC1 operating temperature is not specified in available data.