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Cylindrical beige fiberglass fuse with metal end caps and bolt-on terminals

Bussmann

Bussmann KAC-150 Semiconductor Fuse 150A 600V AC Fast-Acting Bolt-On

SKU CH-T4TP-690ZH

A 150 A, 600 V AC fast-acting semiconductor fuse with a 200 kA interrupt rating and bolt-on mounting for high-power circuit protection

  • Fast-acting protection for sensitive semiconductors with 150 A rating
  • High interrupt capacity of 200 kA at 600 V AC
  • Bolt-on body style simplifies installation in compatible fuse blocks
  • UL Recognised and CE marked for safety compliance
  • Fiberglass body provides durable insulation in demanding environments

Semiconductor Fuse 150A 600V AC

The Bussmann KAC-150 is a fast-acting semiconductor fuse rated for 150 A at 600 V AC. It uses a bolt-on body style for secure mounting in compatible fuse blocks. The fiberglass body houses a single element designed to protect sensitive power semiconductors. It carries CE and UL Recognized markings.

Sustained Load Behaviour

This fuse carries a 200 kA interrupt rating at 600 V AC, allowing it to clear severe fault currents without rupture. Fast-acting operation limits let-through energy to protect downstream devices during overloads. The non-indicating design means visual inspection is required after any fault event. It is built for continuous service in industrial power circuits.

Pre-Order Checks

Verify the bolt-on mounting matches your existing fuse block series such as 1BS. Confirm the physical length of 5 1/8 in and diameter of 1 1/2 in fit the available panel space. Ensure the 600 V AC rating suits your system voltage. Cross-reference equivalent series like KLC or A60X if replacing another brand.

How it compares

Measured against everything we stock in Breakers & Circuit Protection, at today’s prices. Recalculated every night.

Price $159.99
Pricier than about 79% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameEATON BUSSMANN

Questions about this item

How much heat does the 150 A fuse element dissipate during continuous all-day operation?

At full rated current the fuse runs warm; ensure the bolt-on connections are torqued to specification and the surrounding enclosure allows free airflow so the fiberglass body can shed heat without exceeding its temperature limits.

Which fuse block series must I already own to mount this bolt-on KAC-150?

The fuse is designed for the 1BS series block; the 1-1/2 in diameter body and bolt-on terminals mate directly with that block without adapters.

Will the 200 kA interrupt rating at 600 V AC coordinate with older 600 V circuit breakers I keep in the same panel?

Yes, the 200 kA rating exceeds typical legacy breaker interrupt levels, so the fuse will clear a fault before the older breaker sees the full let-through energy.

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