We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

3G Electric
BUSSMANN KTN-R-400 Fast-Acting Blade Fuse, 400 A, 250 V AC/DC, Class RK1 - Fast-Acting Blade Fuses
BUSSMANNFast-Acting Blade Fuses

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

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
KTN-R-400 Fast-Acting Blade Fuse, 400 A, 250 V AC/DC, Class RK1
Part Number
KTN-R-400
Category
Fast-Acting Blade Fuses
Available to Order
Also known as:KTN-R-400BUSSMANN
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

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

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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 drives — BUSSMANN FWC series fast-acting cylindrical fuses protect power semiconductors in AC/DC drive circuits.
Control transformers — BUSSMANN FNQ-R series time-delay fuses handle inrush currents in control power circuits.
Semiconductor protection — BUSSMANN KAC series bolt-on fuses safeguard diodes, thyristors, and IGBTs in AC-only applications.
Electrical panels — BUSSMANN FP-2, FP-3, FP-4, and FP-6 fuse pullers enable safe fuse replacement in distribution panels.
Automotive electrical systems — BUSSMANN FP-A3 fuse puller removes and installs 1/4 in and 1/2 in automotive fuses.
Power supplies — BUSSMANN FWC series fuses provide overcurrent protection in AC/DC power supply circuits.
Not sure this is the right part? Photo-identify it

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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

More from BUSSMANN

View all BUSSMANN parts
Fast-acting blade fuse rated 80 A at 170 V DC. Measures 1 in x 5 7/8 in. Part of the TPN Series. Used for overcurrent protection in DC power distribution systems
BUSSMANN
Fast-acting blade fuse rated 80 A at 170 V DC. Measures 1 in x 5 7/8 in. Part of the TPN Series. Used for overcurrent protection in DC power distribution systems

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first