FLSR015.T Equivalent & Substitute Parts

Part Overview

The FLSR015.T is a 15A cartridge fuse manufactured by Littelfuse Inc. under the POWR-GARD® FLSR series. This slow-blow fuse is rated for 600 VAC and 300 VDC operation and is designed for electrical and industrial applications requiring RK5 class protection. The part is currently active in production with 1116 units in stock. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the same fuse class, voltage ratings, current rating, and response characteristics.

Substiute Parts

FLSR015.T

Littelfuse Inc.In Stock: 1222FLSR015.T Datasheet

Current PartRFQ

FRS-R-15

Eaton - Bussmann Electrical DivisionIn Stock: 984FRS-R-15 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FLSR015.T is determined by strict equivalence across the following critical parameters:

• Current Rating: 15A
• Voltage Rating: 600 VAC / 300 VDC
• Fuse Class: RK5
• Response Time: Slow Blow
• Breaking Capacity: 200kA AC / 20kA DC
• Mounting Configuration: Cartridge requiring holder

The FRS-R-15 manufactured by Eaton - Bussmann Electrical Division meets all electrical and functional requirements for direct substitution. Both parts maintain identical current, voltage, class, and breaking capacity specifications. Physical dimensions vary slightly (FLSR015.T: 0.811" Dia × 5.000" L; FRS-R-15: 0.810" Dia × 3.00" L), but both are non-standard cartridge packages compatible with standard RK5 holders.

Parameter Comparison

Engineering Selection Recommendations

Both the FLSR015.T and FRS-R-15 are active production components with full regulatory compliance. The FLSR015.T carries QPL approval in addition to CE, CSA, and UL certifications, making it suitable for applications requiring qualified parts lists. The FRS-R-15 holds CE, CSA, and UL certifications. Both parts maintain REACH compliance and RoHS compliance status. Selection between these parts should be based on holder compatibility, physical space constraints (noting the length difference of 2.00 inches), and specific certification requirements of the application.

Frequently Asked Questions (FAQ)

Q: Can FRS-R-15 be used as a direct replacement for FLSR015.T?

A: Yes, the FRS-R-15 is electrically and functionally equivalent. Both parts share identical current rating (15A), voltage ratings (600 VAC / 300 VDC), fuse class (RK5), response time (Slow Blow), and breaking capacity (200kA AC / 20kA DC). Verify holder compatibility before installation, as physical dimensions differ slightly.

Q: What is the significance of the RK5 fuse class?

A: RK5 is a fuse class designation indicating a cartridge fuse with specific current-limiting characteristics and breaking capacity. Both substitute parts maintain RK5 class compliance, ensuring equivalent protection performance in the circuit.

Q: Are there differences in regulatory approvals between these parts?

A: The FLSR015.T includes QPL (Qualified Products List) approval, while the FRS-R-15 does not. Both parts hold CE, CSA, and UL certifications. Applications requiring QPL-approved components must use the FLSR015.T.

Q: Does the physical dimension difference affect compatibility?

A: The FLSR015.T measures 0.811" Dia × 5.000" L, while the FRS-R-15 measures 0.810" Dia × 3.00" L. Both are cartridge fuses requiring standard RK5 holders. Verify that the holder accommodates the specific length of the selected fuse before installation.

Q: Are both parts RoHS compliant?

A: Yes. The FLSR015.T is ROHS3 compliant, and the FRS-R-15 is RoHS compliant. Both parts meet environmental compliance requirements.