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BUSSMANN Fuse: Class RK1, KTN-R Series, Fast-Acting, 400 A, 250 V AC, 250 V DC - Fast-Acting Blade Fuses
BUSSMANNFast-Acting Blade Fuses

BUSSMANN Fuse: Class RK1, KTN-R Series, Fast-Acting, 400 A, 250 V AC, 250 V DC

The BUSSMANN KTN-R Series Class RK1 Fast-Acting Blade Fuse (MPN KTN-R-400) is a 400 A, 250 V AC and 250 V DC non-indicating fuse. This industrial fuse is designed for overcurrent protection in electrical circuits.

SKU 3G-OTH-26148

Also listed as: KTNR400 · KTN R 400

Brand
BUSSMANN
Item
Fuse: Class RK1, KTN-R Series, Fast-Acting, 400 A, 250 V AC, 250 V DC
Category
Fast-Acting Blade Fuses
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Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

BUSSMANN
Manufacturer Part Number
KTN-R-400
Series
KTN-R
Type
KTN-R Series, Fast-Acting, 400 A, Non-Indicating
AC
250 V
DC
250 V

Technical Documents

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BUSSMANN Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The BUSSMANN KTN-R Series Class RK1 Fast-Acting Blade Fuse (MPN KTN-R-400) is a 400 A, 250 V AC and 250 V DC non-indicating fuse. This industrial fuse is designed for overcurrent protection in electrical circuits.

Frequently Asked Questions

What is the BUSSMANN KTN-R-400 fuse used for?

The BUSSMANN KTN-R-400 is a Class RK1 fast-acting blade fuse rated 400 A at 250 V AC/DC. It provides overcurrent protection in industrial electrical circuits, such as motor control centers, panelboards, and feeder circuits, where high interrupting capacity and current limitation are required.

What are the specifications of the BUSSMANN KTN-R-400 fuse?

The BUSSMANN KTN-R-400 is a Class RK1, fast-acting, non-indicating fuse rated 400 A, 250 V AC and 250 V DC. It belongs to the KTN-R Series and is manufactured by BUSSMANN. Its compact blade design allows for easy installation in standard fuse holders.

Where to buy the BUSSMANN KTN-R-400 fuse worldwide?

3G Electric supplies the BUSSMANN KTN-R-400 fuse to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time on this Class RK1 fast-acting fuse.

How to select the correct BUSSMANN KTN-R fuse for my application?

To select the correct BUSSMANN KTN-R fuse, match the voltage rating (250 V AC/DC) and current rating (400 A for the KTN-R-400) to your circuit requirements. Ensure the fuse is Class RK1 for high interrupting capacity. Consult a qualified electrician and refer to the manufacturer's data sheet for coordination studies.

Used in

Common applications for BUSSMANN
Industrial motor control centers — BUSSMANN LPT series Class T time-delay fuses for branch circuit protection
Semiconductor protection in variable frequency drives — BUSSMANN FWA series fast-acting bolt-on fuses rated 150 V AC/DC
Automotive auxiliary circuit protection — BUSSMANN CB222 series Type II circuit breakers in 12 V DC systems
Control panel overcurrent protection — BUSSMANN FNA series midget time-delay indicating fuses for instrumentation
Main feeder protection in power distribution — BUSSMANN KLU series Class L time-delay bolt-on fuses up to 650 A
Fuse replacement in existing panels — BUSSMANN S-8301-1-R fuse block accepting 3AG and other glass/ceramic fuses

BUSSMANN Products

3G Electric supplies BUSSMANN fast-acting blade fuses. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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