Littelfuse 048107.5H Indicating Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 048107.5H is a 7.5A indicating fuse rated for 125 VAC and 125 VDC operation. This fast-blow fuse is designed for telecom applications and requires an external holder for installation. The part is currently active in production with 976 units in stock. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the specified parameter range.

Substiute Parts

048107.5H

Littelfuse Inc.In Stock: 1080048107.5H Datasheet

Current PartRFQ

BK/GMT-7-1/2A

Eaton - Bussmann Electrical DivisionIn Stock: 790BK/GMT-7-1/2A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Littelfuse 048107.5H is determined by the following critical parameters:

• Current Rating: Must be 7.5A
• Voltage Rating - AC: Must be 125 VAC minimum
• Voltage Rating - DC: Must support the application requirement (125 VDC for primary part)
• Fuse Type: Must be Indicating Fuse
• Response Time: Must be Fast Blow
• Mounting Type: Must require holder (same form factor compatibility)
• Breaking Capacity: Must meet or exceed 300A at rated voltage
• RoHS Compliance: Must be ROHS3 Compliant

The Eaton Bussmann BK/GMT-7-1/2A meets the core electrical and mechanical criteria with the exception of DC voltage rating, which is specified at 60 VDC rather than 125 VDC. This difference defines the substitution boundary and application suitability.

Parameter Comparison

Engineering Selection Recommendations

Both the Littelfuse 048107.5H and Eaton Bussmann BK/GMT-7-1/2A are active production parts with ROHS3 compliance and UR approval. Selection between these parts is determined by DC voltage requirements:

• Use Littelfuse 048107.5H for applications requiring 125 VDC rating
• Use Eaton Bussmann BK/GMT-7-1/2A for applications requiring 60 VDC or lower DC operation

Both parts carry CSA or UR certification and are suitable for telecom applications. The Eaton Bussmann part provides higher breaking capacity in DC applications (450A DC vs. 300A). Physical dimensions differ slightly between the two designs, which may affect holder compatibility depending on the specific holder model in use.

Frequently Asked Questions (FAQ)

Q: Can the Eaton Bussmann BK/GMT-7-1/2A replace the Littelfuse 048107.5H in all applications?

A: No. The Eaton Bussmann part is rated for 60 VDC maximum, while the Littelfuse part is rated for 125 VDC. Substitution is only valid for applications operating at 60 VDC or lower.

Q: Are the physical dimensions compatible between these two fuses?

A: The fuses have different dimensions. Littelfuse 048107.5H measures 0.665" L x 0.228" W x 0.772" H, while the Eaton Bussmann BK/GMT-7-1/2A measures 0.688" L x 0.127" W x 0.810" H. Holder compatibility must be verified for the specific application.

Q: Do both parts have the same approval certifications?

A: The Littelfuse part carries CSA and UR approval. The Eaton Bussmann part carries UR approval only. Application requirements may dictate which certification is necessary.

Q: What is the current rating tolerance for these fuses?

A: Both parts are rated at 7.5A with fast-blow response time, meeting the same current specification.

Q: Are both parts RoHS compliant?

A: Yes, both the Littelfuse 048107.5H and Eaton Bussmann BK/GMT-7-1/2A are ROHS3 compliant.