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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

SKU 3G-OTH-27184

Brand
BUSSMANN
Item
Fuse: Class RK5, FRS-R Series, Time-Delay, 400 A, 600 V AC, 300 V DC
Category
Time-Delay Blade Fuses
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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
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BUSSMANN Products
3G Electric (S) Pte. Ltd. — Singapore

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.

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