250 A aR Fuse
High speed aR fuse rated 250 A for semiconductor and DC link protection.
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Technical specifications, features, applications and purchasing information.
| Brand | Bussmann |
| Model Number | 170M1321 |
| Product Category | High Speed Square Body Fuse |
| Product Family | 170M Series |
| Amperage Rating | 250 A |
| Voltage Rating | 690 V (IEC) / 700 V (UL) |
| Voltage Type | AC |
| Breaking Capacity | 200 kA |
| Class | aR |
| Fuse Size | 000 |
| Clearing I²t at 660 V | 51500 A²s |
| Pre-arc I²t | 7750 A²s |
| Watt Losses | 42 W |
| Fuse Type | DIN 43653 U/80, without indicator, bolted tag |
| Mounting | Bolted tag |
| Product Length/Depth | 105 mm |
| Product Height | 46 mm |
| Product Weight | 140.3 g |
High speed aR fuse rated 250 A for semiconductor and DC link protection.
Dual voltage rating for IEC and UL applications.
Provides high fault current interruption capability.
DIN 43653 U/80 body with bolted tag terminals.
High clearing I²t at 660 V for robust short-circuit protection.
Suitable for DC common bus, DC drives, and power converters.
We support online purchase of the Bussmann 170M1321 High Speed Square Body 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.
What is the Bussmann 170M1321? The 170M1321 is a high speed square body fuse rated 250 A at 690 V AC (IEC) / 700 V AC (UL).
What is the amperage rating? 250 A.
What is the voltage rating? 690 V AC (IEC) and 700 V AC (UL).
What is the breaking capacity? 200 kA.
What is the clearing I²t at 660 V? 51500 A²s.
What is the pre-arc I²t? 7750 A²s.
What class is the fuse? aR.
What is the mounting configuration? DIN 43653 U/80, bolted tag, without indicator.
What is the watt loss? 42 W.
What are typical applications? Semiconductor protection, DC bus, DC drives, and power converters.
What should be confirmed before ordering? Check circuit voltage, continuous current, fault level, fuse size, terminal type, and indicator needs.
Send us your part number and technical requirements.