Littelfuse 0RLS200.X Fuse Cartridge - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0RLS200.X is a 200A, 600VAC cylindrical fuse cartridge from the POWR-GARD® RLS series, designed for electrical and industrial applications requiring fast-blow response characteristics. This part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility within the same electrical and mechanical parameters.

Substiute Parts

0RLS200.X

Littelfuse Inc.In Stock: 10340RLS200.X Datasheet

Current PartRFQ

KLSR200.X

Littelfuse Inc.In Stock: 755KLSR200.X Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The KLSR200.X qualifies as a direct substitute based on the following critical parameters:

• Current Rating: Both parts rated at 200A
• AC Voltage Rating: Both rated at 600 VAC
• Fuse Type: Both are cartridge-type fuses
• Response Time: Both exhibit fast-blow characteristics
• Mounting Configuration: Both require holder mounting with cylindrical blade terminals
• Approval Certifications: Both carry CE, CSA, and UL approvals
• Manufacturer: Both manufactured by Littelfuse Inc.

The KLSR200.X represents an active product with enhanced specifications, including DC voltage capability (300 VDC) and superior breaking capacity (200kA AC vs. 10kA AC), making it a functionally compatible and technically superior alternative.

Parameter Comparison

Engineering Selection Recommendations

The KLSR200.X is the appropriate substitute for the obsolete 0RLS200.X based on the following factors:

Product Status: The 0RLS200.X is obsolete, while the KLSR200.X maintains active product status with current manufacturing and availability.

Electrical Compatibility: Both parts share identical current (200A) and AC voltage (600 VAC) ratings, ensuring direct functional equivalence in AC applications.

Certification Alignment: Both parts carry identical approval certifications (CE, CSA, UL), maintaining compliance requirements for electrical and industrial applications.

Enhanced Specifications: The KLSR200.X provides superior breaking capacity (200kA AC versus 10kA AC) and adds DC voltage capability (300 VDC), offering improved performance margins without compromising AC circuit protection.

Regulatory Compliance: The KLSR200.X achieves ROHS3 compliance, addressing modern environmental and regulatory requirements that the non-compliant 0RLS200.X does not meet.

Physical Accommodation: The KLSR200.X has a longer physical length (9.626" versus 6.878"), requiring verification that the fuse holder accommodates the increased dimension. Diameter remains identical at 1.843".

Frequently Asked Questions (FAQ)

Q: Can the KLSR200.X directly replace the 0RLS200.X in existing installations?

A: The KLSR200.X provides electrical equivalence for 200A, 600 VAC AC applications. Physical verification is required to confirm that the fuse holder accommodates the longer cartridge length (9.626" versus 6.878"). Both parts use identical cylindrical blade terminal configurations and require holder mounting.

Q: What is the difference between Class H and Class RK1 fuses?

A: Class H and Class RK1 represent different fuse classifications with distinct breaking capacities and application characteristics. The 0RLS200.X is Class H with 10kA breaking capacity, while the KLSR200.X is Class RK1 with 200kA AC breaking capacity. Substitution is valid when the application circuit design accommodates the RK1 classification.

Q: Does the KLSR200.X add DC voltage capability that the 0RLS200.X lacks?

A: Yes. The KLSR200.X is rated for 300 VDC in addition to 600 VAC, while the 0RLS200.X specification does not include DC voltage rating. This additional capability does not affect AC-only applications but provides expanded functionality for mixed AC/DC systems.

Q: Are both parts manufactured by the same company?

A: Yes. Both the 0RLS200.X and KLSR200.X are manufactured by Littelfuse Inc., ensuring consistent quality standards and support.

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

A: The KLSR200.X is ROHS3 compliant, meeting current environmental and hazardous substance restrictions. The 0RLS200.X is non-compliant. For applications subject to RoHS regulations or environmental standards, the KLSR200.X is the required choice.

Q: Are the approval certifications identical?

A: Yes. Both parts carry CE, CSA, and UL approvals, maintaining equivalent certification status for electrical and industrial applications.