aR Cylindrical fuse links for semiconductors

aR Cylindrical Semiconductor Fuse Links – Fast-Acting Protection for Power Electronics

DF Electric’s aR cylindrical fuse links are high-speed aR-class fuses, specifically designed to protect semiconductor components such as IGBTs, thyristors, SCRs, and diodes. These fast-acting fuses provide critical protection in circuits where conventional fuses are too slow to react to short-circuit events.

 Key Features

• aR operating class – Offers ultra-fast disconnection to protect sensitive semiconductors from damage during fault conditions

• Voltage rating – Up to 690V AC and 700V DC (L/R = 10ms)

• Breaking capacity – 200kA at 690V AC, 30kA at 700V DC

• Current ratings – 1A to 100A

• Optional striker pin – Compatible with microswitches for remote fault indication

• Construction – Ceramic tube with silver-plated contacts for high durability and conductivity

• Standards – Compliant with IEC/EN 60269-1/-4 and UL 248-1/-13

Applications

• Power semiconductor protection (IGBTs, MOSFETs, thyristors)

• DC/AC inverters and rectifiers

• Soft starters and variable speed drives (VSD/VFD)

• UPS systems, welding controls, and high-speed DC switching equipment

• Any power electronics requiring low I²t and rapid fault isolation

Why Choose DF Electric AR Fuse Links?

• Specifically engineered for semiconductor fault protection

• Fast acting with minimal energy let-through (low I²t)

• Supports both AC and DC environments with high breaking capacity

• Reliable performance in industrial automation, drive systems, and precision electronics