LR252001C Equivalent & Substitute Parts

Part Overview

The LR252001C is a Class R fuse holder rated for 200 A at 250V, designed for single-circuit cartridge fuses with chassis mount configuration. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance and component replacement in existing installations.

The primary reason for seeking substitutes is the obsolete product status, which limits availability through standard distribution channels. Equivalent parts must maintain identical electrical ratings and mechanical compatibility with Class R cartridge fuses while accommodating different mounting architectures.

Substiute Parts

LR252001C

Littelfuse Inc.In Stock: 1042LR252001C Datasheet

Current PartRFQ

LFR252001C

Littelfuse Inc.In Stock: 1144LFR252001C Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LR252001C is based on electrical and mechanical parameter alignment:

Critical Matching Parameters:

• Current Rating: 200 A (exact match required)
• Voltage Rating: 250V (exact match required)
• Fuse Type: Cartridge (exact match required)
• Fuse Size: 1.563" Dia x 7.126" L (exact match required)
• Number of Circuits: 1 (exact match required)
• Termination Style: Box Lug (exact match required)

Allowable Variation:

• Mounting Type: Chassis Mount (original) vs. DIN Rail (substitute) — both accommodate the same cartridge fuse form factor and electrical interface

The LFR252001C qualifies as a direct substitute based on identical electrical ratings, fuse compatibility, and mechanical dimensions. The transition from chassis mount to DIN rail mounting represents a design evolution within the same product family, enabling installation flexibility without compromising electrical performance.

Parameter Comparison

Engineering Selection Recommendations

The LFR252001C is the direct electrical and mechanical equivalent for the obsolete LR252001C. Both components accept identical Class R cartridge fuses and maintain the same 200 A / 250V electrical interface through box lug terminations.

Selection of the LFR252001C provides the additional benefit of active product status, ensuring continued availability and supply chain reliability. The component also achieves ROHS3 compliance, meeting current environmental and regulatory standards, whereas the original LR252001C does not.

The transition from chassis mount to DIN rail mounting requires mechanical redesign of the installation enclosure but does not affect electrical compatibility or fuse performance. This substitution is appropriate for new installations or system upgrades where mounting infrastructure can be adapted.

Frequently Asked Questions (FAQ)

Q: Can the LFR252001C directly replace the LR252001C without modification?

A: Electrical compatibility is complete. Mechanical installation requires adaptation of the mounting structure, as the LFR252001C uses DIN rail mounting instead of chassis mount. The fuse cartridge interface and electrical ratings are identical.

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

A: Yes. Both holders accept Class R cartridge fuses with identical dimensions (1.563" Dia x 7.126" L). Any Class R fuse rated for 200 A at 250V is compatible with both components.

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

A: The LFR252001C meets ROHS3 compliance standards, restricting hazardous substances in manufacturing. The LR252001C does not meet these standards. For applications subject to environmental regulations or customer requirements, the LFR252001C is the appropriate choice.

Q: Is the box lug termination identical on both parts?

A: Yes. Both components use box lug termination, ensuring compatible electrical connections to the same wiring infrastructure.

Q: Why is the LR252001C obsolete?

A: Product obsolescence reflects Littelfuse's transition to the LFR series, which incorporates DIN rail mounting and improved compliance standards. The LFR252001C represents the current product generation for this electrical specification.