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

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

The BUSSMANN FRS-R Series Fuse is a Class RK5, time-delay blade fuse rated at 300 A, 600 V AC and 300 V DC, non-indicating (MPN FRS-R-300). As a time-delay fuse, it accommodates temporary inrush currents without…

SKU 3G-OTH-27036

Also listed as: FRSR300 · FRS R 300

Brand
BUSSMANN
Item
Fuse: Class RK5, FRS-R Series, Time-Delay, 300 A, 600 V AC, 300 V DC
Category
Time-Delay Blade Fuses
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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-300
Series
FRS-R
Type
FRS-R Series, Time-Delay, 300 A, Non-Indicating
AC
600 V
DC
300 V

Technical Documents

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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 300 A, 600 V AC and 300 V DC, non-indicating (MPN FRS-R-300). As a time-delay fuse, it accommodates temporary inrush currents without nuisance opening, making it suitable for motor and transformer circuits. 3G Electric interprets your demand for this OEM-specified protection component, sources it from BUSSMANN, and delivers it with technical support across 14 industrial departments — with specialist depth in combustion, pumps and controls.

Frequently Asked Questions

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

The BUSSMANN FRS-R-300 is a Class RK5 time-delay fuse rated 300 A, 600 V AC / 300 V 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 FRS-R-300 fuse?

The BUSSMANN FRS-R-300 is a non-indicating, time-delay blade fuse from the FRS-R series. It carries 300 A, 600 V AC, 300 V DC, and is Class RK5 rated. The manufacturer part number is FRS-R-300.

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

3G Electric supplies the BUSSMANN FRS-R-300 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 correct BUSSMANN FRS-R series fuse for a motor circuit?

Select the FRS-R fuse based on motor full-load current and starting characteristics. The time-delay feature handles inrush without nuisance opening. Verify voltage rating (600 V AC / 300 V DC) and ensure Class RK5 rejection clips are used in the fuse holder.

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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Compatible alternatives & equivalents

Cross-referenced by specification & description
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, 400 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-400)
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BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 400 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-400)
BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 80 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-80)
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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)
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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, 75 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-75)
BUSSMANN
BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 75 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-75)

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