LPS-RK-40SPI Equivalent & Substitute Parts

Part Overview

The LPS-RK-40SPI is an indicating fuse manufactured by Eaton - Bussmann Electrical Division. This component is classified as a fuse and is currently in active product status with RoHS compliance. The need to identify equivalent and substitute parts arises from inventory availability, supply chain considerations, and application-specific requirements where alternative manufacturers' components meet identical electrical and mechanical specifications.

Substiute Parts

LPS-RK-40SPI

Eaton - Bussmann Electrical DivisionIn Stock: 859LPS-RK-40SPI Datasheet

Current PartRFQ

LSRK040.T

Littelfuse Inc.In Stock: 961LSRK040.T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LPS-RK-40SPI is determined by the following critical parameters:

• Current Rating: 40 Amperes
• Voltage Rating - AC: 600 VAC
• Voltage Rating - DC: 300 VDC
• Fuse Type: Cartridge
• Response Time: Slow Blow
• Class: RK1
• Size / Dimension: 1.063" Dia x 5.500" L (27.00mm x 139.70mm)
• Regulatory Compliance: RoHS Compliant, ECCN EAR99, HTSUS 8536.10.0040

The LSRK040.T from Littelfuse Inc. qualifies as a direct substitute based on matching electrical specifications (40A, 600 VAC / 300 VDC), identical fuse class (RK1), cartridge form factor, and slow blow response characteristics. Both components share the same HTSUS classification and ECCN designation.

Parameter Comparison

Engineering Selection Recommendations

The LSRK040.T cartridge fuse from Littelfuse Inc. is a qualified substitute for the LPS-RK-40SPI based on electrical and mechanical parameter equivalence. Both components are active products with current RoHS compliance status. The LSRK040.T carries additional regulatory approvals (CE, CSA, QPL, UL) and specified breaking capacity ratings (200kA AC, 20kA DC), which may provide enhanced documentation for applications requiring formal certification records. Selection between these components should be based on availability, packaging requirements (Bulk vs. Box), and specific application certification needs.

Frequently Asked Questions (FAQ)

Q: Can the LSRK040.T directly replace the LPS-RK-40SPI in existing installations?

A: Yes. Both components share identical current ratings (40A), voltage ratings (600 VAC / 300 VDC), fuse class (RK1), cartridge form factor, and slow blow response characteristics. Physical dimensions are equivalent (1.063" Dia x 5.500" L). Both require a compatible fuse holder for installation.

Q: What are the key electrical parameters that define substitution eligibility?

A: The critical parameters are current rating (40A), AC voltage rating (600 VAC), DC voltage rating (300 VDC), fuse class (RK1), and response time (Slow Blow). Deviation in any of these parameters disqualifies a component as a direct substitute.

Q: Are there packaging differences between these parts?

A: Yes. The LPS-RK-40SPI is supplied in Bulk packaging, while the LSRK040.T is supplied in Box packaging. This affects order quantities and storage considerations but does not impact electrical or mechanical compatibility.

Q: What compliance certifications apply to both components?

A: Both components are RoHS compliant and classified under ECCN EAR99 and HTSUS 8536.10.0040. The LSRK040.T carries additional approvals from CE, CSA, QPL, and UL.

Q: Is a fuse holder required for installation?

A: Yes. Both the LPS-RK-40SPI and LSRK040.T are cartridge fuses that require a compatible holder for installation in electrical circuits.