LR601003C Equivalent & Substitute Parts

Part Overview

The LR601003C is a Class R fuse holder designed for chassis mount applications, rated for 100 A at 600V with 3-circuit cartridge configuration. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance and component procurement. The LR601003C accepts standard Class R cartridge fuses and provides box lug termination for secure electrical connections in industrial power distribution systems.

Substiute Parts

LR601003C

Littelfuse Inc.In Stock: 1049LR601003C Datasheet

Current PartRFQ

LFR601003CID

Littelfuse Inc.In Stock: 750LFR601003CID Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LR601003C is determined by strict equivalence across the following critical parameters:

• Current Rating: 100 A (exact match required)
• Voltage Rating: 600V (exact match required)
• Number of Circuits: 3 (exact match required)
• Fuse Type: Cartridge (exact match required)
• Fuse Size: 1.339" Dia x 7.874" L / 34mm x 200mm (exact match required)
• Termination Style: Box Lug (exact match required)
• Compatibility with Class R Fuses (functional requirement)

The LFR601003CID meets all substitution criteria. While the mounting configuration differs (DIN Rail vs. Chassis Mount), the electrical specifications, fuse compatibility, and physical cartridge dimensions remain identical, allowing functional replacement in applications where mounting infrastructure can accommodate DIN rail installation.

Parameter Comparison

Engineering Selection Recommendations

The LFR601003CID is the direct electrical and functional equivalent to the obsolete LR601003C. Both components share identical current, voltage, circuit count, fuse type, and physical cartridge specifications. The primary distinction is mounting configuration: the LR601003C uses chassis mount while the LFR601003CID uses DIN rail mounting.

Selection of the LFR601003CID is supported by its active product status and ROHS3 compliance, ensuring continued availability and regulatory alignment with modern manufacturing standards. The LR601003C's RoHS non-compliant status and obsolete classification make the LFR601003CID the preferred choice for new installations and component replacement programs.

Frequently Asked Questions (FAQ)

Q: Can the LFR601003CID directly replace the LR601003C in existing installations?

A: Electrical compatibility is complete. The LFR601003CID accepts identical Class R cartridge fuses and maintains the same 100 A / 600V specifications. Physical installation requires DIN rail mounting infrastructure rather than chassis mounting. Mechanical integration must be evaluated for your specific enclosure design.

Q: Are the cartridge fuses interchangeable between these two models?

A: Yes. Both the LR601003C and LFR601003CID accept Class R cartridge fuses of 1.339" Dia x 7.874" L (34mm x 200mm) dimensions. Fuse selection is independent of the holder mounting type.

Q: What is the significance of the RoHS compliance difference?

A: The LR601003C is RoHS non-compliant while the LFR601003CID is ROHS3 compliant. For applications subject to RoHS regulations or procurement policies requiring compliance, the LFR601003CID is the appropriate selection.

Q: Are there any electrical performance differences between these components?

A: No. Both components are rated identically at 100 A, 600V, with 3-circuit configuration and box lug termination. Electrical performance and fuse protection characteristics are equivalent.

Q: What should be considered when transitioning from LR601003C to LFR601003CID?

A: The primary consideration is mounting infrastructure. Verify that your enclosure or panel supports DIN rail installation. Electrical connections, fuse compatibility, and current/voltage ratings require no modification.