L50S350.V Equivalent & Substitute Parts

Part Overview

The L50S350.V is a 350A fuse cartridge manufactured by Littelfuse Inc. under the POWR-GARD® L50S series. This component is rated for 500 VAC and 450 VDC operation with bolt mount configuration and fast blow response characteristics. The part is currently active in production with 793 units in stock. Alternative components may be required due to supply constraints, application-specific requirements, or design standardization across manufacturing facilities.

Substiute Parts

L50S350.V

Littelfuse Inc.In Stock: 894L50S350.V Datasheet

Current PartRFQ

FWH-350A

Eaton - Bussmann Electrical DivisionIn Stock: 796FWH-350A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The FWH-350A from Eaton - Bussmann Electrical Division qualifies as a substitute based on the following critical parameters:

Current Rating: Both parts are rated at 350A, ensuring equivalent load protection.

Voltage Rating - AC: Both parts are rated at 500 VAC, maintaining identical AC circuit protection capability.

Voltage Rating - DC: The L50S350.V is rated at 450 VDC while the FWH-350A is rated at 500 VDC. The higher DC rating of the substitute provides equal or greater protection margin.

Fuse Type: Both are cartridge fuses, ensuring functional equivalence in circuit protection architecture.

Mounting Type: Both use bolt mount configuration, allowing direct mechanical installation compatibility.

Package / Case: Both feature cylindrical design with blade terminal (bolt) connection, supporting identical mounting hardware.

Approval Agency: Both hold CE, CSA, and UR certifications, confirming compliance with the same regulatory standards.

RoHS Status: Both are ROHS3 compliant, meeting environmental and material restriction requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the L50S350.V and FWH-350A are active production components with identical current and AC voltage ratings. The FWH-350A provides a higher DC voltage rating (500 VDC versus 450 VDC) and increased DC breaking capacity (50kA versus 20kA), offering enhanced performance margins in DC applications. Both components hold equivalent regulatory certifications (CE, CSA, UR) and meet ROHS3 compliance requirements. Selection between these parts should be based on application voltage requirements, DC breaking capacity needs, and physical space constraints related to dimensional differences.

Frequently Asked Questions (FAQ)

Q: Can the FWH-350A directly replace the L50S350.V in all applications?

A: Direct replacement is valid for applications operating at or below 450 VDC and 500 VAC. The FWH-350A's higher DC voltage rating (500 VDC) and increased DC breaking capacity (50kA) make it suitable for equivalent or more demanding DC circuit protection scenarios. Physical dimensions differ; verify mounting space compatibility.

Q: What are the key differences between these two 350A cartridge fuses?

A: The primary differences are DC voltage rating (450 VDC for L50S350.V versus 500 VDC for FWH-350A), DC breaking capacity (20kA versus 50kA), and physical length (2.094" versus 4.340"). Both maintain identical 350A current rating, 500 VAC rating, bolt mount configuration, and regulatory certifications.

Q: Are both parts RoHS compliant?

A: Yes, both the L50S350.V and FWH-350A are ROHS3 compliant and meet REACH requirements.

Q: What certifications do these fuses hold?

A: Both components are certified by CE, CSA, and UR approval agencies, ensuring compliance with international electrical safety standards.

Q: Does the difference in physical dimensions affect installation?

A: Yes. The FWH-350A is longer (4.340" L versus 2.094" L). Verify that the mounting enclosure and bolt terminal spacing accommodate the substitute part's dimensions before installation.