LR256001C Equivalent & Substitute Parts

Part Overview

The LR256001C is a Class R cartridge fuse holder rated for 600 A at 250V, designed for single-circuit chassis mount applications. This component is classified as obsolete, making identification of compatible alternatives essential for system maintenance and component replacement. The part accepts Class R cartridge fuses and terminates via box lug connections, serving as a critical interface in high-current electrical distribution systems.

Substiute Parts

LR256001C

Littelfuse Inc.In Stock: 1188LR256001C Datasheet

Current PartRFQ

LFR256001C

LittelfuseIn Stock: 1010LFR256001C Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LR256001C is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Parameters: Current rating (600 A), voltage rating (250V), and fuse type (cartridge) must remain constant to ensure proper circuit protection and system safety.

Mechanical Parameters: Fuse size (2.591" Dia x 10.374" L) and number of circuits (1) must match to ensure physical fit and functional equivalence.

Functional Parameters: Termination style (box lug) and compatibility with Class R fuses establish the interface requirements.

The LFR256001C qualifies as a direct substitute based on identical electrical ratings, mechanical dimensions, fuse compatibility, and termination style. The primary distinction lies in mounting configuration: the LR256001C uses chassis mount, while the LFR256001C uses DIN rail mount. Both accept the same Class R cartridge fuses and maintain equivalent electrical performance.

Parameter Comparison

Engineering Selection Recommendations

The LFR256001C serves as the direct electrical and mechanical equivalent to the obsolete LR256001C. Both components maintain identical current and voltage ratings, accept the same Class R cartridge fuses, and provide equivalent circuit protection functionality.

Selection between these parts depends on system integration requirements. The LR256001C is suitable for applications requiring chassis mount configuration. The LFR256001C is appropriate for systems utilizing DIN rail architecture and offers the advantage of active product status with ROHS3 compliance, ensuring continued availability and regulatory alignment.

When transitioning from the obsolete LR256001C, the LFR256001C provides functional equivalence with the additional benefit of modern compliance certifications and ongoing manufacturer support.

Frequently Asked Questions (FAQ)

Q: Can the LFR256001C directly replace the LR256001C? A: The LFR256001C provides electrical and mechanical equivalence in terms of current rating, voltage rating, fuse type, and fuse dimensions. The primary difference is mounting configuration: chassis mount versus DIN rail. Substitution is valid when the installation environment supports DIN rail mounting.

Q: What Class R fuses are compatible with both parts? A: Both the LR256001C and LFR256001C accept Class R cartridge fuses with dimensions 2.591" Dia x 10.374" L (65.8mm x 264.6mm) rated for 250V operation.

Q: Why is the LR256001C listed as obsolete? A: The LR256001C has been discontinued by the manufacturer. The LFR256001C represents the active product line continuation with equivalent electrical performance and modern compliance standards.

Q: Are there compliance differences between these parts? A: The LR256001C is RoHS non-compliant. The LFR256001C is ROHS3 compliant and REACH unaffected, making it suitable for applications with regulatory compliance requirements.

Q: What is the significance of the box lug termination? A: Box lug termination provides a standardized connection interface for high-current applications. Both parts utilize this termination style, ensuring compatibility with existing wiring and connection infrastructure.

Q: Can mounting configuration be modified to use the LFR256001C in a chassis mount application? A: Mounting configuration is determined by the mechanical design of each component. Substitution requires that the installation environment accommodate the specific mounting type of the selected part.