FWA-800A Equivalent & Substitute Parts

Part Overview

The FWA-800A is an 800A cartridge fuse manufactured by Eaton - Bussmann Electrical Division, rated for 150 VAC and 150 VDC operation with bolt mount configuration. This component is designed for industrial and electrical applications requiring high-current protection in systems operating at up to 150 volts. The part maintains Active product status with 928 units in current inventory. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the specified parameter range.

Substiute Parts

FWA-800A

Eaton - Bussmann Electrical DivisionIn Stock: 964FWA-800A Datasheet

Current PartRFQ

L15S800.V

Littelfuse Inc.In Stock: 1163L15S800.V Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FWA-800A is determined by the following critical parameters:

• Current Rating: Must equal 800A
• Voltage Rating - AC: Must equal or exceed 150 VAC
• Voltage Rating - DC: Must equal or exceed 150 VDC
• 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 1.250" L envelope
• Approval Agencies: Must maintain CE and UR certifications or equivalent regulatory compliance

The L15S800.V from Littelfuse Inc. qualifies as a substitute based on matching current rating, AC voltage rating, mounting configuration, and physical envelope. The DC voltage rating of 100 VDC on the substitute is lower than the 150 VDC specification of the main part; therefore, the L15S800.V is suitable only for applications where the system DC voltage does not exceed 100 VDC.

Parameter Comparison

Engineering Selection Recommendations

The L15S800.V cartridge fuse from Littelfuse Inc. is an acceptable substitute for the FWA-800A in applications where both of the following conditions are satisfied:

1. The system DC voltage does not exceed 100 VDC (the substitute is rated for 100 VDC versus the main part's 150 VDC rating)
2. The maximum available fault current in the AC circuit does not exceed 100kA (the substitute has a 100kA AC breaking capacity versus the main part's 200kA AC breaking capacity)

Both parts maintain Active product status and carry required regulatory approvals (CE and UR). The substitute includes additional CSA certification. Both components are RoHS compliant and use identical bolt mount cylindrical configurations with compatible physical dimensions. The Littelfuse part is available in higher inventory quantity (1151 units versus 928 units for the Eaton part).

Frequently Asked Questions (FAQ)

Q: Can the L15S800.V be used as a direct replacement for the FWA-800A in all applications?

A: No. The L15S800.V has a lower DC voltage rating (100 VDC versus 150 VDC) and lower AC breaking capacity (100kA versus 200kA). Substitution is only valid when the application operates at DC voltages not exceeding 100 VDC and fault currents not exceeding 100kA AC.

Q: Are the physical dimensions compatible between these two fuses?

A: Yes. Both fuses use the same 1.500" diameter cylindrical case with bolt mount blade terminals. The length difference is 0.002" (31.75mm versus 31.80mm), which is negligible for mechanical fit.

Q: Do both fuses carry the same regulatory certifications?

A: Both fuses carry CE and UR certifications. The Littelfuse L15S800.V additionally carries CSA certification. All required approvals are maintained.

Q: What is the difference in response time between these fuses?

A: The FWA-800A response time is not specified in the available data. The L15S800.V is rated as Fast Blow. Response time characteristics should be evaluated against specific application requirements.

Q: Which fuse should be selected if the application requires 150 VDC operation?

A: The FWA-800A must be used for applications requiring 150 VDC operation, as the L15S800.V is only rated for 100 VDC maximum.

Q: What is the melting I²t value for the L15S800.V?

A: The melting I²t value for the L15S800.V is not provided in the available technical data. This parameter should be obtained from the manufacturer's detailed specification sheet if thermal energy characteristics are critical to the application.