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FWH-40B Eaton Bussmann 500V 40A Class aR Semiconductor Fuse
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Eaton Bussmann FWH-40B — 500V 40A Class aR semiconductor fuse, 50 kAIC at 500 Vdc 200 kAIC at 1000 Vac interrupting. Protects semiconductors in drives, rectifiers and inverters.
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FWH-40B Eaton Bussmann 500V 40A Class aR Semiconductor Fuse
At a Glance
- 500 Vac, 500 Vdc rated voltage, 40 A rated current
- 50 kAIC at 500 Vdc 200 kAIC at 1000 Vac interrupting rating
- Class aR time-current characteristic
- Blade end x blade end terminations
The Eaton Bussmann FWH-40B is a fuse with 500 Vac, 500 Vdc rated voltage, 40 A rated current, 50 kAIC at 500 Vdc 200 kAIC at 1000 Vac interrupting capacity, carrying a Class aR time-current characteristic. Construction is non indicating.
Specifications
General specifications
| Model Code | 40A 500V AC TAG HIGH SPEED FUSE |
| UPC | 051712795753 |
| EAN | 5027590499651 |
| Product Length/Depth | 108 mm |
| Product Height | 28 mm |
| Product Width | 90 mm |
| Product Weight | 63.6 g |
| Global Catalog | FWH-40B |
Product specifications
| Amperage Rating | 40 A |
| Breaking capacity | 200 kA |
| Fuse indicator | Non Indicating |
| Insulated metal gripping lugs (IMGL) | No |
| Utilization category | aR (accompanied semiconductor protection) |
| Voltage type | AC/DC |
| Rated switching capacity | 200 kA |
| Rated voltage AC | 500 V |
| Rated voltage DC | 500 V |
| Mounting dimension | M8 |
| Center-to-center distance of connections | 60.75 mm |
| Current type | AC/DC |
| Class | Class aR |
| Clearing (I2T) | 320 |
| Watt losses | 7.5 W |
| Fuse shape | Cylindrical, center bolted tags |
| Pre arc (I2T) | 76 |
| Color | None |
| Interrupt rating | 50 kAIC at 500 Vdc 200 kAIC at 1000 Vac |
| Connection | Blade end x blade end |
| Construction size | Other |
| Mounting method | Stud |
| Voltage rating | 500 Vac, 500 Vdc |
| Type | High speed fuse |
| Application | Semiconductor, DC Common bus, DC drives, Power converters/rectifiers |
| Fuse type | FWH-B |
| Fuse system (according to IEC 60269) | Other |
Series Selection Table
Applications
- Industrial equipment
Selection Notes
- Termination: Blade end x blade end. Confirm the mating clip or busbar before ordering; ferrule and blade ends are not interchangeable.
Common Questions
What are the ratings of the Eaton Bussmann FWH-40B?
500 Vac, 500 Vdc / 40 A, with a 50 kAIC at 500 Vdc 200 kAIC at 1000 Vac interrupting rating.
How much fault current can the FWH-40B interrupt?
50 kAIC at 500 Vdc 200 kAIC at 1000 Vac. The available fault current at the installation point must not exceed this value.
What does Class aR mean for the FWH-40B?
Class aR defines the fuse's time-current characteristic. E-rated fuses carry a defined melting curve so they coordinate predictably with upstream and downstream devices; mixing E and non-E ratings in one feeder defeats that coordination.
How does the FWH-40B connect?
Blade end x blade end. Confirm the mating clip, holder or busbar before ordering — ferrule and blade ends are not interchangeable.
How should I select the FWH-40B for a circuit?
Match the voltage rating to the system voltage, keep the continuous current above the load current, and check that the interrupting rating exceeds the available fault current. In medium voltage work, select on the transformer or feeder fault level rather than the load current alone.
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