LJ602003C Equivalent & Substitute Parts

Part Overview

The LJ602003C is a 200 A, 600V fuse block designed for Class J cartridge fuses with 3-circuit capacity and chassis mount configuration. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance, repair, and component sourcing. The primary substitute maintains identical electrical specifications while offering updated mounting flexibility and improved compliance status.

Substiute Parts

LJ602003C

Littelfuse Inc.In Stock: 1212LJ602003C Datasheet

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LFJ602003C

Littelfuse Inc.In Stock: 974LFJ602003C Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the LJ602003C is determined by strict equivalence across electrical and mechanical parameters. The substitute part LFJ602003C maintains identical specifications for current rating (200 A), voltage rating (600V), fuse type (cartridge), fuse size (1.625" Dia x 5.75" L), number of circuits (3), fuseholder type (block), and termination style (box lug). Both parts are designed for Class J fuses and share the same electrical performance envelope.

The primary difference between the main part and substitute is the mounting configuration: the LJ602003C uses chassis mount, while the LFJ602003C uses DIN rail mount. This distinction allows for flexible installation in different system architectures while preserving all electrical and mechanical compatibility with Class J cartridge fuses.

Parameter Comparison

Engineering Selection Recommendations

The LFJ602003C serves as the direct functional equivalent to the obsolete LJ602003C. Selection between these parts depends on system mounting architecture and regulatory compliance requirements.

For new designs or systems requiring updated compliance standards, the LFJ602003C is the appropriate choice. This part is classified as active product status and meets ROHS3 compliance, providing assurance of continued availability and regulatory alignment. The DIN rail mounting configuration supports modern industrial control panel designs.

For legacy system maintenance where chassis mount configuration is required, the LJ602003C remains available in current inventory (1110 pcs). However, the LFJ602003C can be adapted to chassis mount applications through appropriate mechanical mounting hardware, provided system space and electrical clearance requirements are satisfied.

Both parts share identical electrical performance characteristics and Class J fuse compatibility, ensuring equivalent circuit protection functionality across 200 A, 600V applications with 3-circuit capacity.

Frequently Asked Questions (FAQ)

Q: Can the LFJ602003C replace the LJ602003C in an existing chassis-mounted installation?

A: The LFJ602003C is electrically and mechanically equivalent to the LJ602003C. The primary difference is mounting type: DIN rail versus chassis mount. Substitution requires mechanical adaptation to accommodate the different mounting interface. Electrical performance and fuse compatibility remain identical.

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

A: The LJ602003C is RoHS non-compliant, while the LFJ602003C meets ROHS3 standards. For applications subject to RoHS regulations or requiring compliance documentation, the LFJ602003C is the appropriate selection. Both parts function identically in circuit protection applications.

Q: Are the fuse cartridges interchangeable between these two fuse blocks?

A: Yes. Both the LJ602003C and LFJ602003C accept identical Class J cartridge fuses with 1.625" diameter and 5.75" length specifications. Fuse selection is independent of the fuse block mounting type.

Q: What is the difference between the LJ and LF series designations?

A: The series designation reflects the mounting configuration and product line. LJ indicates chassis mount configuration, while LF indicates DIN rail mount configuration. Both series are manufactured by Littelfuse Inc. and share identical electrical specifications for this 200 A, 600V, 3-circuit application.

Q: Is the LJ602003C still available for purchase?

A: The LJ602003C is classified as obsolete product status. Current inventory of 1110 pieces is available. For long-term sourcing and new applications, the active-status LFJ602003C is recommended.