FWH-40A 500V FUSE

Product Description

The FWH-40A is a stud-mount, high-speed current-limiting fuse used primarily for protection of semiconductor devices such as IGBTs, SCRs, diodes, and power converters. It belongs to the Bussmann FWH series, which is engineered for extremely fast fault interruption and very low let-through energy to protect sensitive electronic equipment.

This fuse is widely used in industrial drive systems, rectifiers, inverters, UPS systems, and DC bus applications where rapid fault clearing is essential.

Key Features

• High-speed semiconductor protection fuse
• Stud-mount construction for secure installation
• Extremely fast current-limiting performance
• High interrupting capacity up to 200 kA
• Suitable for AC and DC systems (500V class)
• Ceramic body with sand-filled arc-quenching design
• Low I²t energy for semiconductor safety
• Reliable protection for power electronics
• Non-indicating design (standard variant)
• Compatible with industrial fuse holders and busbar mounting
• Stable operation under high fault current conditions
• UL recognised industrial protection device

Specifications

• Product Type: High-Speed Semiconductor Fuse
• Model: FWH-40A
• Series: Eaton Bussmann FWH
• Rated Current: 40 A
• Rated Voltage: 500 VAC / 500 VDC
• Interrupting Rating: up to 200 kA AC (typical series rating)
• Fuse Class: aR/semiconductor protection class
• Mounting Type: Stud/bolt-on connection
• Construction: Ceramic tube, sand-filled element
• Body Size: approx. 13/16 in × 3-3/16 in (≈ 20 × 81 mm)
• Application: Drives, inverters, rectifiers, UPS systems, DC link protection, industrial power converters
• Standards: UL recognised / IEC semiconductor fuse standards