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

3G Electric
RFQ CartGet a QuoteSign inSign up
BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 400 A, 600 V AC, 300 V DC - Time-Delay Blade Fuses
BUSSMANNTime-Delay Blade Fuses

BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 400 A, 600 V AC, 300 V DC

The BUSSMANN FRS-R Series Fuse is a Class RK5, time-delay blade fuse rated at 400 A, 600 V AC and 300 V DC, non-indicating. This OEM-specified component provides overcurrent protection for industrial circuits…

SKU 3G-OTH-27184

Also listed as: FRSR400 · FRS R 400

Brand
BUSSMANN
Item
Fuse: Class RK5, FRS-R Series, Time-Delay, 400 A, 600 V AC, 300 V DC
Category
Time-Delay Blade Fuses
Available to Order
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
FRS-R-400
Series
FRS-R
Type
FRS-R Series, Time-Delay, 400 A, Non-Indicating
AC
600 V
DC
300 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 FRS-R Series Fuse is a Class RK5, time-delay blade fuse rated at 400 A, 600 V AC and 300 V DC, non-indicating. This OEM-specified component provides overcurrent protection for industrial circuits requiring a time-delay characteristic.

Frequently Asked Questions

What is a BUSSMANN FRS-R-400 fuse used for?

The BUSSMANN FRS-R-400 is a Class RK5 time-delay fuse rated 400 A at 600 V AC or 300 V DC. It protects motor circuits, feeders, and branch circuits against short circuits and sustained overloads in industrial power distribution, panelboards, and switchgear.

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

The BUSSMANN FRS-R-400 is a 400 A, 600 V AC / 300 V DC, Class RK5 time-delay fuse from the FRS-R series. It is non-indicating and designed for high-current industrial protection where inrush tolerance is required.

Where to buy BUSSMANN FRS-R-400 fuses worldwide?

3G Electric supplies the BUSSMANN FRS-R-400 fuse to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time on this Class RK5 time-delay fuse.

How to select the right BUSSMANN FRS-R fuse for an application?

Select the FRS-R fuse based on continuous load current (typically 125% of motor FLA), available fault current, and voltage rating (600 V AC or 300 V DC). The time-delay characteristic handles motor starting inrush without nuisance opening. Consult a qualified engineer 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 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 →

Compatible alternatives & equivalents

Cross-referenced by specification & description
BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 300 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-300)
BUSSMANN
BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 300 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-300)
BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 90 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-90)
BUSSMANN
BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 90 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-90)
BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 80 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-80)
BUSSMANN
BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 80 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-80)
BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 400 A, 250 V AC, 250 V DC, Non-Indicating (MPN FRN-R-400)
BUSSMANN
BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 400 A, 250 V AC, 250 V DC, Non-Indicating (MPN FRN-R-400)
BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 70 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-70)
BUSSMANN
BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 70 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-70)
BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 500 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-500)
BUSSMANN
BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 500 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-500)

More from BUSSMANN

View all BUSSMANN parts →
BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 150 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-150)
BUSSMANN
BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 150 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-150)
BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 225 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-225)
BUSSMANN
BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 225 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-225)
BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 100 A, 250 V AC, 125 V DC, Non-Indicating (MPN FRN-R-100)
BUSSMANN
BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 100 A, 250 V AC, 125 V DC, Non-Indicating (MPN FRN-R-100)
BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 110 A, 250 V AC, 125 V DC, Non-Indicating (MPN FRN-R-110)
BUSSMANN
BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 110 A, 250 V AC, 125 V DC, Non-Indicating (MPN FRN-R-110)
BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 300 A, 250 V AC, 250 V DC, Non-Indicating (MPN FRN-R-300)
BUSSMANN
BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 300 A, 250 V AC, 250 V DC, Non-Indicating (MPN FRN-R-300)
BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 150 A, 250 V AC, 125 V DC, Non-Indicating (MPN FRN-R-150)
BUSSMANN
BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 150 A, 250 V AC, 125 V DC, Non-Indicating (MPN FRN-R-150)
BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 450 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-450)
BUSSMANN
BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 450 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-450)
BUSSMANN Fuse: Class RK1, LPS-RK-SP Series, Time-Delay, 600 A, 600 V AC, 300 V DC, Non-Indicating (MPN LPS-RK-600SP)
BUSSMANN
BUSSMANN Fuse: Class RK1, LPS-RK-SP Series, Time-Delay, 600 A, 600 V AC, 300 V DC, Non-Indicating (MPN LPS-RK-600SP)