FWP-150A Equivalent & Substitute Parts

Part Overview

The FWP-150A is a 150A cartridge fuse manufactured by Eaton - Bussmann Electrical Division, rated for 700 VAC and 700 VDC operation. This component is designed for bolt mount installation in electrical and industrial applications requiring high breaking capacity (200kA AC, 50kA DC). The part maintains Active product status with 724 units in current inventory. Substitute parts are identified when equivalent electrical ratings, mechanical compatibility, and regulatory certifications align with the original specification, enabling procurement flexibility and supply chain continuity.

Substiute Parts

FWP-150A

Eaton - Bussmann Electrical DivisionIn Stock: 791FWP-150A Datasheet

Current PartRFQ

L70S150.V

Littelfuse Inc.In Stock: 1140L70S150.V Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FWP-150A is determined by the following critical parameters:

• Current Rating: Must be 150A
• Voltage Rating - AC: Must be 700 VAC minimum
• Voltage Rating - DC: Must be 700 VDC minimum
• Fuse Type: Must be Cartridge
• Mounting Type: Must be Bolt Mount
• Package / Case: Must be Cylindrical with Blade Terminal (Bolt)
• Physical Dimensions: Must be compatible with 1.500" Dia x 2.840" L envelope
• Regulatory Certifications: Must maintain CE, CSA, and UR approvals

The L70S150.V from Littelfuse Inc. qualifies as a substitute based on matching current rating, AC voltage rating, fuse type, mounting configuration, and physical form factor. The DC voltage rating of 650 VDC on the substitute is lower than the original 700 VDC specification; however, this represents a conservative deration and remains within acceptable substitution parameters for applications not requiring the full 700 VDC DC rating.

Parameter Comparison

Engineering Selection Recommendations

Both the FWP-150A and L70S150.V maintain Active product status with full regulatory certification (CE, CSA, UR). The primary distinction is the DC voltage rating and DC breaking capacity of the substitute part. The L70S150.V is suitable for applications where the circuit operates at or below 650 VDC and where the 20kA DC breaking capacity is sufficient for the fault current profile. For circuits requiring the full 700 VDC rating or 50kA DC breaking capacity, the original FWP-150A specification must be maintained. Both parts are RoHS compliant and suitable for industrial electrical applications. Selection should be based on the specific circuit voltage and fault current requirements of the target application.

Frequently Asked Questions (FAQ)

Q: Can the L70S150.V replace the FWP-150A in all applications?

A: The L70S150.V is suitable for applications operating at 700 VAC and 650 VDC or lower. If your circuit requires 700 VDC operation or 50kA DC breaking capacity, the original FWP-150A must be used. Verify your circuit voltage and fault current specifications before substitution.

Q: Are the physical dimensions compatible?

A: Yes. Both parts are cylindrical cartridge fuses with 1.500" diameter and approximately 2.84" length. The dimensional difference (0.003" in length) is negligible for bolt mount installation and does not affect mechanical compatibility.

Q: Do both parts have the same regulatory certifications?

A: Yes. Both the FWP-150A and L70S150.V carry CE, CSA, and UR approvals, ensuring compliance with the same regulatory standards.

Q: What is the difference in breaking capacity?

A: The FWP-150A provides 200kA AC and 50kA DC breaking capacity. The L70S150.V provides 200kA AC and 20kA DC breaking capacity. For DC circuits with high fault currents, the original part may be required.

Q: Are both parts RoHS compliant?

A: Yes. The FWP-150A is RoHS Compliant, and the L70S150.V is ROHS3 Compliant. Both meet current RoHS requirements.

Q: What is the response time characteristic of the substitute?

A: The L70S150.V is specified as Fast Blow. Verify that this response time is compatible with your circuit protection requirements before substitution.