FLSR080.V Equivalent & Substitute Parts

Part Overview

The FLSR080.V is a 80A cartridge fuse manufactured by Littelfuse, part of the POWR-GARD® FLSR series. This slow-blow fuse is rated for 600 VAC and 300 VDC applications and is designed for electrical and industrial systems requiring holder-mounted protection. The part is currently active in production with 863 units in stock. Equivalent parts are identified when they maintain identical electrical ratings, mechanical compatibility, and regulatory certifications while potentially offering different packaging or dimensional tolerances.

Substiute Parts

FLSR080.V

LittelfuseIn Stock: 914FLSR080.V Datasheet

Current PartRFQ

FRS-R-80

Eaton - Bussmann Electrical DivisionIn Stock: 816FRS-R-80 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FLSR080.V is determined by strict equivalence across the following electrical and mechanical parameters:

• Current Rating: 80A (exact match required)
• Voltage Ratings: 600 VAC and 300 VDC (both must be met)
• Fuse Class: RK5 (defines interrupting characteristics)
• Response Time: Slow Blow (thermal-magnetic behavior)
• Breaking Capacity: 200kA AC and 20kA DC (fault protection capability)
• Mounting Configuration: Holder-mounted cartridge format

The FRS-R-80 manufactured by Eaton - Bussmann Electrical Division meets all these criteria. While dimensional tolerances and packaging differ, the electrical performance and safety certifications remain equivalent for direct substitution in holder-based installations.

Parameter Comparison

Engineering Selection Recommendations

Both the FLSR080.V and FRS-R-80 are active production parts with full regulatory compliance. Selection between these parts should be based on:

• Holder compatibility: Verify that the fuse holder accommodates the specific diameter and length of the selected cartridge. The FLSR080.V has a larger diameter (33.30mm) compared to the FRS-R-80 (28.19mm).
• Regulatory requirements: Both parts carry CE, CSA, and UL certifications. The FLSR080.V includes QPL approval, which may be required for specific defense or aerospace applications.
• Inventory availability: FLSR080.V has 863 units in stock; FRS-R-80 has 713 units in stock.
• Environmental compliance: Both parts meet RoHS requirements and are REACH unaffected.

Frequently Asked Questions (FAQ)

Q: Can the FRS-R-80 be used as a direct replacement for the FLSR080.V?

A: Electrical substitution is valid when the fuse holder is designed to accept the FRS-R-80 dimensions (1.110" diameter x 7.880" length). The electrical ratings, breaking capacity, and certifications are equivalent. Physical fit must be confirmed before installation.

Q: What is the difference between RK5 class fuses and other classes?

A: RK5 class fuses are current-limiting cartridge fuses designed for industrial power distribution. They provide fast clearing at high fault currents while allowing normal inrush currents. Both the FLSR080.V and FRS-R-80 are RK5 class, ensuring identical protective characteristics.

Q: Are there dimensional compatibility issues between these two parts?

A: Yes. The FLSR080.V is 33.30mm in diameter, while the FRS-R-80 is 28.19mm in diameter. The fuse holder must be rated for the specific cartridge diameter. Length differences are minimal (200.00mm vs 200.15mm) and typically not a constraint.

Q: Do both parts have the same breaking capacity?

A: Yes. Both the FLSR080.V and FRS-R-80 have a breaking capacity of 200kA AC and 20kA DC at rated voltage, ensuring equivalent fault protection performance.

Q: Which part should I select for QPL-required applications?

A: The FLSR080.V carries QPL approval in addition to CE, CSA, and UL certifications. If QPL compliance is mandatory, the FLSR080.V is the required selection.