LSRK200.X Equivalent & Substitute Parts

Part Overview

The LSRK200.X is a 200A cartridge fuse rated for 600 VAC / 300 VDC operation, manufactured by Littelfuse Inc. under the POWR-GARD® and POWR-PRO® LLSRK series. This component is classified as RK1 and designed for electrical and industrial applications requiring slow-blow response characteristics. The part is currently active in production with 851 units in stock. Substitute parts are identified when equivalent electrical ratings, voltage specifications, current capacity, and approval certifications align with the main part's functional requirements.

Substiute Parts

LSRK200.X

Littelfuse Inc.In Stock: 902LSRK200.X Datasheet

Current PartRFQ

LPS-RK-200SP

Eaton - Bussmann Electrical DivisionIn Stock: 1181LPS-RK-200SP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LSRK200.X is determined by the following critical parameters:

• Current Rating: 200A (exact match required)
• Voltage Rating - AC: 600 VAC (exact match required)
• Voltage Rating - DC: 300 VDC (exact match required)
• Fuse Type: Cartridge (exact match required)
• Response Time: Slow Blow (exact match required)
• Class: RK1 (exact match required)
• Approval Agencies: Minimum CE, CSA, UL certification required

The LPS-RK-200SP manufactured by Eaton - Bussmann Electrical Division meets all critical electrical parameters and holds equivalent certifications (CE, CSA, UL). Both parts are RK1-class cartridge fuses with identical current and voltage ratings and slow-blow response characteristics. Mechanical differences in mounting type (Requires Holder vs. Bolt Mount) and package dimensions do not affect electrical substitutability when proper installation hardware is employed.

Parameter Comparison

Engineering Selection Recommendations

Both the LSRK200.X and LPS-RK-200SP are active production components with full regulatory compliance. The LSRK200.X holds QPL certification in addition to CE, CSA, and UL approvals. The LPS-RK-200SP provides higher breaking capacity ratings (300kA AC / 100kA DC versus 200kA AC / 20kA DC), which represents an operational advantage in high-fault-current environments. Selection between these parts should be based on holder compatibility, space constraints, and application-specific breaking capacity requirements. Both parts satisfy RK1 class specifications and identical electrical ratings for standard industrial and electrical applications.

Frequently Asked Questions (FAQ)

Q: Can the LPS-RK-200SP replace the LSRK200.X in existing installations?

A: Electrical substitution is valid when the installation holder or mounting hardware accommodates the LPS-RK-200SP's bolt-mount configuration. The LSRK200.X requires a holder, while the LPS-RK-200SP uses bolt mounting. Verify mechanical compatibility with your existing equipment before installation.

Q: What is the significance of the different breaking capacity ratings?

A: Breaking capacity indicates the maximum fault current the fuse can safely interrupt. The LPS-RK-200SP's higher breaking capacity (300kA AC / 100kA DC) provides enhanced protection in systems with higher available fault currents. The LSRK200.X's 200kA AC / 20kA DC rating is suitable for applications with lower fault current availability.

Q: Are both parts RoHS compliant?

A: Yes. The LSRK200.X is ROHS3 compliant, and the LPS-RK-200SP is RoHS compliant. Both meet environmental regulatory requirements.

Q: Do both fuses have identical response times?

A: Yes. Both the LSRK200.X and LPS-RK-200SP are slow-blow cartridge fuses, providing identical response characteristics for motor protection and transformer protection applications.

Q: What certifications must a substitute part hold?

A: A substitute must hold minimum CE, CSA, and UL certifications to ensure compatibility with the LSRK200.X's regulatory profile. Additional certifications such as QPL enhance qualification for specific applications.