Eaton Bussmann

Bussmann FWH-125B Fuse

SKU: LL1-BSM-FWH-125B

$32.36

Available

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Eaton Bussmann

Bussmann FWH-125B Fuse

SKU: LL1-BSM-FWH-125B

PRODUCT PRICE USD

$32.36

Available to order

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PRODUCT DOCUMENTATION

Product Information

Technical specifications, features, applications and purchasing information.

Technical Specifications

Brand	Bussmann
Model Number	FWH-125B
Product Category	Fuse
Series	Eaton Bussmann FWH
Fuse Type	High Speed Cylindrical Fuse
Rated Current	125 A
Rated Voltage AC	500 V
Rated Voltage DC	500 V
Breaking Capacity (AC)	200 kAIC at 1000 VAC
Breaking Capacity (DC)	50 kAIC at 500 VDC
Utilization Category	Class aR (semiconductor protection)
Pre-arc I2t	800 A2s
Clearing I2t	3500 A2s
Power Loss	25 W
Fuse Shape	Center bolted tags, cylindrical
Connection	Blade end x blade end
Mounting	Stud, M8
Center-to-Center Distance	74.09 mm
Product Length/Depth	91 mm
Product Height	30 mm
Product Width	30 mm
Product Weight	152 g
Certifications	UL Recognized, CSA Certified, CE Marked, RoHS Compliant

Key Features

125 A High-Speed Cylindrical Fuse

Eaton Bussmann FWH series high-speed fuse with a 125 A rating, Class aR, designed for semiconductor and DC common bus protection.

500 VAC / 500 VDC Rating

Rated 500 VAC and 500 VDC for dual AC/DC protection in power conversion and drive circuits.

200 kAIC AC Breaking Capacity

200 kAIC at 1000 VAC and 50 kAIC at 500 VDC provide high fault current interruption for demanding applications.

Center Bolted Blade Terminals

Cylindrical body with center bolted tags, blade-end connections, and M8 stud mounting for secure high-current installations.

UL Recognized and CSA Certified

Carries UL Recognition, CSA Certification, and CE marking for use in North American and international equipment.

Applications

Semiconductor protection
DC common bus
DC drives
Power converters and rectifiers
Industrial power electronics
AC and DC high-energy circuits
FWH series fuse replacement
Drive and rectifier maintenance projects

Purchase Information

We support online purchase of the Bussmann FWH-125B Fuse. If you need to make bulk purchases and inquire about other products, please contact our team to inform us of your purchase requirements. We will provide you with information such as quantity quotations, delivery dates, and transportation methods.

Frequently Asked Questions

What is the Bussmann FWH-125B? The Bussmann FWH-125B is a high-speed cylindrical fuse from the Eaton Bussmann FWH series, rated 125 A at 500 VAC / 500 VDC.

What is the voltage rating of the FWH-125B? It is rated 500 VAC and 500 VDC.

What is the breaking capacity of the FWH-125B? The FWH-125B has a 200 kAIC breaking capacity at 1000 VAC and 50 kAIC at 500 VDC.

What class is the FWH-125B? It is Class aR, intended for semiconductor protection.

What is the power loss of the FWH-125B? The published power loss is 25 W.

What are the dimensions of the FWH-125B? The fuse is 91 mm long, 30 mm high, and 30 mm wide, with an M8 stud mounting and 74.09 mm center-to-center connection distance.

What certifications does the FWH-125B carry? It is UL Recognized, CSA Certified, CE Marked, and RoHS Compliant.

What is the pre-arc I2t of the FWH-125B? The pre-arc I2t is 800 A2s, and the clearing I2t is 3500 A2s.

Where is the FWH-125B typically applied? Typical applications include semiconductor protection, DC common bus, DC drives, and power converters/rectifiers.

What should be verified before ordering an FWH-125B? Confirm the catalog number, voltage and current ratings, mounting configuration, and certification requirements against the application.

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