Littelfuse 04980900S MIDI® 498 Fuse Block Equivalent & Substitute Parts

Part Overview

The Littelfuse 04980900S is a bolt-down fuse block designed for 200 A circuits at 58V, part of the MIDI® 498 series. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and new design implementations. The part serves as a single-circuit panel-mount fuseholder for applications requiring high-current protection in industrial and automotive environments.

Substiute Parts

04980900S

Littelfuse Inc.In Stock: 104604980900S Datasheet

Current PartRFQ

BLC-05-GTA

OptiFuseIn Stock: 1201BLC-05-GTA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Littelfuse 04980900S is determined by the following critical parameters:

• Current Rating Compatibility: The substitute must support the application's maximum current requirement. The original part is rated for 200 A; substitutes rated at or above this value are acceptable.
• Voltage Rating: The substitute voltage rating must equal or exceed 58V to ensure safe operation under the original design specifications.
• Circuit Configuration: Both the original and substitute must be single-circuit fuseholders to maintain electrical architecture.
• Termination Style: Bolt-down termination is required for mechanical and electrical compatibility.
• RoHS Compliance: Both parts must meet ROHS3 compliance standards for regulatory alignment.

The OptiFuse BLC-05-GTA meets these substitution criteria with a 300 A current rating (exceeding the 200 A requirement), 32V voltage rating, single-circuit configuration, bolt-down termination, and ROHS3 compliance. The difference in mounting type (chassis mount versus panel mount) and fuse size represents a design trade-off that must be evaluated within the specific application context.

Parameter Comparison

Engineering Selection Recommendations

The OptiFuse BLC-05-GTA is an active product with current manufacturing support and ROHS3 compliance, addressing the obsolescence status of the Littelfuse 04980900S. The substitute provides higher current capacity (300 A versus 200 A), which offers design margin for the original 200 A application requirement.

The voltage rating difference (32V substitute versus 58V original) requires circuit-level evaluation. If the application operates at voltages exceeding 32V, the substitute is not suitable. If the application operates at or below 32V, the substitute meets voltage requirements with margin.

Mounting type and physical dimensions differ between the parts. Panel mount versus chassis mount installation requires mechanical redesign. The smaller fuse size of the substitute (16mm length versus 41mm) may affect thermal management and mechanical fit within the original enclosure.

Both parts maintain ROHS3 compliance and bolt-down termination, ensuring regulatory alignment and electrical connection compatibility.

Frequently Asked Questions (FAQ)

Q: Can the OptiFuse BLC-05-GTA directly replace the Littelfuse 04980900S without modification?

A: Direct replacement requires evaluation of three factors: (1) application voltage must not exceed 32V, (2) mounting configuration must accommodate chassis mount instead of panel mount, and (3) physical envelope must fit the smaller fuse block dimensions. If all three conditions are met, substitution is feasible.

Q: Why does the substitute have a higher current rating (300 A versus 200 A)?

A: Higher current ratings in substitute components are acceptable and provide design margin. The application will operate within the 200 A design point, and the fuseholder will not be stressed by the higher rating capacity.

Q: What is the significance of the voltage rating difference?

A: The original part is rated for 58V operation. The substitute is rated for 32V. If the circuit operates at voltages between 32V and 58V, the substitute cannot be used. If the circuit operates at 32V or below, the substitute is suitable.

Q: Are there mechanical compatibility concerns?

A: Yes. The original part is panel-mount with dimensions 41mm x 12mm x 8.3mm. The substitute is chassis-mount with dimensions 16mm x 12mm x 8mm. The mounting method and physical size differ, requiring enclosure modification.

Q: Do both parts meet current regulatory requirements?

A: Both parts are ROHS3 compliant, meeting current environmental and hazardous substance regulations.