LPS-RK-1-1/4SP Equivalent & Substitute Parts

Part Overview

The LPS-RK-1-1/4SP is a low-peak dual element fuse manufactured by Eaton - Bussmann Electrical Division. This component is actively produced and RoHS compliant, serving as a critical protective device in electrical and industrial applications. Identifying equivalent substitute parts ensures design flexibility, supply chain continuity, and access to alternative sourcing options when the primary part becomes unavailable or when system requirements necessitate component alternatives.

Substiute Parts

LPS-RK-1-1/4SP

Eaton - Bussmann Electrical DivisionIn Stock: 1153LPS-RK-1-1/4SP Datasheet

Current PartRFQ

LSRK1.25T

Littelfuse Inc.In Stock: 760LSRK1.25T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The LSRK1.25T from Littelfuse Inc. qualifies as an equivalent substitute based on the following critical parameters:

• Fuse Class: RK1 classification ensures mechanical and electrical compatibility within the same protective device family
• Current Rating: 1.25A nominal rating matches the primary part's electrical protection requirements
• Voltage Rating: 600 VAC / 300 VDC ratings provide equivalent electrical operating envelope
• Response Time: Slow blow characteristic maintains consistent thermal protection behavior
• Regulatory Compliance: Both parts carry RoHS compliance and EAR99 ECCN classification
• HTSUS Classification: Identical tariff code (8536.10.0040) confirms product category alignment

Parameter Comparison

Engineering Selection Recommendations

Both the LPS-RK-1-1/4SP and LSRK1.25T maintain active product status with current manufacturing support. The Littelfuse LSRK1.25T provides documented breaking capacity specifications (200kA AC / 20kA DC) and multiple approval agency certifications (CE, CSA, QPL, UL), which may be advantageous for applications requiring explicit fault current ratings or specific regulatory documentation. Both components satisfy RoHS compliance requirements and share identical electrical protection characteristics at 1.25A, 600 VAC / 300 VDC operation. Component selection should be based on availability, packaging requirements (bulk versus box), and specific approval agency mandates for the target application.

Frequently Asked Questions (FAQ)

Q: What makes LSRK1.25T a valid substitute for LPS-RK-1-1/4SP?

A: Both components share identical electrical protection parameters: 1.25A current rating, 600 VAC / 300 VDC voltage ratings, RK1 class designation, and slow blow response time. These parameters define the protective function and determine substitution eligibility.

Q: Are there packaging differences between these parts?

A: Yes. The LPS-RK-1-1/4SP is supplied in bulk packaging, while the LSRK1.25T is supplied in box packaging. Verify packaging requirements for your procurement and inventory management processes.

Q: Does the LSRK1.25T require a holder for installation?

A: Yes, the LSRK1.25T is a cartridge-type fuse that requires a compatible holder for installation. Confirm holder compatibility before substitution.

Q: Are both parts RoHS compliant?

A: Yes. The LPS-RK-1-1/4SP is RoHS compliant, and the LSRK1.25T is ROHS3 compliant. Both satisfy RoHS regulatory requirements.

Q: What approval agencies certify the LSRK1.25T?

A: The LSRK1.25T carries CE, CSA, QPL, and UL certifications. Verify that these certifications align with your application's regulatory requirements.

Q: Can I use these parts interchangeably in all applications?

A: Electrical protection characteristics are equivalent. However, mechanical installation differences (holder requirements) and packaging formats must be evaluated for your specific system design and procurement workflow.