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BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 300 A, 250 V AC, 250 V DC - Time-Delay Blade Fuses
BUSSMANNTime-Delay Blade Fuses

BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 300 A, 250 V AC, 250 V DC

SKU 3G-OTH-26969

Brand
BUSSMANN
Item
Fuse: Class RK5, FRN-R Series, Time-Delay, 300 A, 250 V AC, 250 V DC
Category
Time-Delay Blade Fuses
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Technical Specifications

BUSSMANN
Manufacturer Part Number
FRN-R-300
Series
FRN-R
Type
FRN-R Series, Time-Delay, 300 A, Non-Indicating
AC
250 V
DC
250 V
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BUSSMANN Products
3G Electric (S) Pte. Ltd. — Singapore

Frequently Asked Questions

What is the BUSSMANN FRN-R-300 fuse used for?

The BUSSMANN FRN-R-300 is a Class RK5 time-delay fuse rated 300 A at 250 V AC/DC. It protects motors, transformers, and other inductive loads from short circuits and sustained overloads in industrial power distribution and control panels.

What are the specifications of the BUSSMANN FRN-R-300 fuse?

The FRN-R-300 is a 300 A, 250 V AC/DC, Class RK5 time-delay fuse from the FRN-R series. It is non-indicating and designed for branch-circuit protection where high inrush currents occur. BUSSMANN is the manufacturer (MPN FRN-R-300).

Where to buy the BUSSMANN FRN-R-300 fuse worldwide?

3G Electric supplies the BUSSMANN FRN-R-300 fuse to customers worldwide. As a global industrial sourcing partner, we handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this Class RK5 time-delay fuse.

How to select the correct BUSSMANN FRN-R series fuse for a motor circuit?

Select the FRN-R series fuse based on motor full-load current and starting characteristics. The time-delay feature allows temporary inrush without nuisance opening. Verify voltage rating (250 V AC/DC) and ensure the amp rating (e.g., 300 A) exceeds continuous load. Consult NEC Article 430 for sizing.

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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