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

3G Electric
BUSSMANN FRN-R-400 Time-Delay Blade Fuse - Time-Delay Blade Fuses
BUSSMANNTime-Delay Blade Fuses

BUSSMANN FRN-R-400 Time-Delay Blade Fuse

The BUSSMANN FRN-R-400 is a Class RK5, time-delay blade fuse from the FRN-R Series, rated at 400 A with 250 V AC and 250 V DC capacity. This non-indicating fuse is designed for overcurrent protection in industrial…

SKU 3G-OTH-27146

Also listed as: FRNR400 · FRN R 400

Brand
BUSSMANN
Item
FRN-R-400 Time-Delay Blade Fuse
Part Number
FRN-R-400
Category
Time-Delay Blade Fuses
Available to Order
Also known as:FRN-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
FRN-R-400
Series
FRN-R
Type
FRN-R Series, Time-Delay, 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 FRN-R-400 is a Class RK5, time-delay blade fuse from the FRN-R Series, rated at 400 A with 250 V AC and 250 V DC capacity. This non-indicating fuse is designed for overcurrent protection in industrial electrical systems, supporting motor and equipment circuits that require a time-delay characteristic to handle inrush currents.

Frequently Asked Questions

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

The BUSSMANN FRN-R-400 is a Class RK5 time-delay fuse rated 400 A at 250 V AC/DC. It protects motors, transformers, and other inductive loads from short circuits and sustained overloads. Its time-delay characteristic prevents nuisance opening during inrush currents, making it suitable for industrial power distribution and control panels.

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

The BUSSMANN FRN-R-400 is a non-indicating, time-delay blade fuse from the FRN-R Series. It is rated 400 A at 250 V AC and 250 V DC. The manufacturer part number is FRN-R-400. It is a Class RK5 fuse designed for overcurrent protection in industrial circuits.

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

3G Electric supplies the BUSSMANN FRN-R-400 fuse worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time. We source and deliver genuine BUSSMANN components to any country.

How to select the correct BUSSMANN FRN-R-400 fuse for an application?

Select the BUSSMANN FRN-R-400 fuse by matching its 400 A rating and 250 V AC/DC voltage to your circuit's full-load current and system voltage. Ensure the Class RK5 time-delay characteristic aligns with your motor or transformer inrush requirements. Always consult the manufacturer's data sheet for coordination and interrupting rating.

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 time-delay 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

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first