Equivalent & Substitute Parts for 0RLS012.T

Part Overview

The 0RLS012.T is a 12A 600VAC fast-blow fuse cartridge from Littelfuse Inc.'s POWR-GARD® RLS series, designed for electrical and industrial applications requiring holder-mounted protection. This part is classified as obsolete, making identification of compatible substitutes essential for system maintenance and component replacement in existing installations.

Substiute Parts

0RLS012.T

Littelfuse Inc.In Stock: 11570RLS012.T Datasheet

Current PartRFQ

KLSR012.T

Littelfuse Inc.In Stock: 840KLSR012.T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The KLSR012.T qualifies as a direct substitute for the 0RLS012.T based on the following critical parameters:

• Current Rating: Both parts are rated at 12A
• AC Voltage Rating: Both parts are rated at 600 VAC
• Response Time: Both parts are fast-blow
• Fuse Type: Both are cartridge-type fuses
• Mounting Type: Both require a holder
• Physical Dimensions: Identical at 0.811" Dia x 5.000" L (20.60mm x 127.00mm)
• Approval Agencies: Both carry CE, CSA, and UL certifications

The KLSR012.T represents an enhanced alternative with extended voltage capability (250 VDC) and improved breaking capacity, while maintaining full compatibility with the original part's AC specifications.

Parameter Comparison

Engineering Selection Recommendations

The KLSR012.T is the manufacturer-recommended substitute for the obsolete 0RLS012.T. Both parts maintain identical electrical specifications for AC applications at 12A and 600 VAC, ensuring direct functional compatibility in existing holder-mounted installations.

The KLSR012.T offers additional advantages: active product status ensures ongoing availability, ROHS3 compliance meets current environmental standards, and enhanced breaking capacity (200kA AC versus 10kA) provides superior fault protection. The addition of 250 VDC rating extends application flexibility without compromising AC performance.

Both parts carry identical international certifications (CE, CSA, UL) and share the same physical dimensions, confirming mechanical and electrical interchangeability.

Frequently Asked Questions (FAQ)

Q: Can the KLSR012.T be used as a direct replacement for the 0RLS012.T in existing installations?

A: Yes. Both parts are rated at 12A, 600 VAC, fast-blow response, and share identical physical dimensions (0.811" Dia x 5.000" L). They are mechanically and electrically compatible in holder-mounted applications.

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

A: Class H and Class RK1 are different fuse classifications. The KLSR012.T (Class RK1) provides higher breaking capacity (200kA AC) compared to the 0RLS012.T (Class H, 10kA), offering enhanced protection in high-fault-current environments.

Q: Does the KLSR012.T's 250 VDC rating affect its use in 600 VAC applications?

A: No. The KLSR012.T maintains full 600 VAC AC rating. The additional 250 VDC capability expands application scope without altering AC performance.

Q: Why is the 0RLS012.T listed as obsolete?

A: The 0RLS012.T has been discontinued by the manufacturer. The KLSR012.T is the active replacement, offering equivalent AC specifications with improved compliance and protection characteristics.

Q: Are both parts RoHS compliant?

A: The 0RLS012.T is RoHS non-compliant. The KLSR012.T is ROHS3 compliant, meeting current environmental and regulatory requirements for new installations and replacements.