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BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 4 A, 600 V AC, 300 V DC - Time-Delay Cylindrical Fuses
BUSSMANNTime-Delay Cylindrical Fuses

BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 4 A, 600 V AC, 300 V DC

The BUSSMANN Fuse: Class RK5 is a time-delay cylindrical fuse from the FRS-R Series, rated at 4 A, 600 V AC and 300 V DC, non-indicating (MPN FRS-R-4). 3G Electric interprets this demand and sources the exact OEM…

SKU 3G-OTH-25413

Also listed as: FRSR4 · FRS R 4

Brand
BUSSMANN
Item
Fuse: Class RK5, FRS-R Series, Time-Delay, 4 A, 600 V AC, 300 V DC
Category
Time-Delay Cylindrical Fuses
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Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

BUSSMANN
Manufacturer Part Number
FRS-R-4
Series
FRS-R
Type
FRS-R Series, Time-Delay, 4 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 Fuse: Class RK5 is a time-delay cylindrical fuse from the FRS-R Series, rated at 4 A, 600 V AC and 300 V DC, non-indicating (MPN FRS-R-4). 3G Electric interprets this demand and sources the exact OEM part, backed by specialist expertise in electrical components across 14 industrial departments.

Frequently Asked Questions

What is a BUSSMANN FRS-R-4 fuse used for?

The BUSSMANN FRS-R-4 is a Class RK5 time-delay fuse rated 4 A, 600 V AC / 300 V DC. It protects motor circuits, transformers, and lighting panels from overloads and short circuits. Its time-delay characteristic prevents nuisance opening during inrush currents, making it ideal for industrial equipment.

What are the specifications of the BUSSMANN FRS-R-4 fuse?

The BUSSMANN FRS-R-4 is a non-indicating, time-delay cylindrical fuse from the FRS-R series. It is rated 4 A, 600 V AC and 300 V DC. The manufacturer part number is FRS-R-4. It is a Class RK5 fuse designed for branch-circuit protection in industrial control panels and motor starters.

Where to buy BUSSMANN FRS-R-4 fuses worldwide?

3G Electric supplies BUSSMANN FRS-R-4 fuses worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this Class RK5 time-delay fuse rated 4 A, 600 V AC.

How to select the right BUSSMANN FRS-R fuse for a motor circuit?

To select the correct BUSSMANN FRS-R fuse, match the voltage rating (600 V AC or 300 V DC) and ensure the amp rating (e.g., 4 A) exceeds the motor full-load current. The time-delay feature handles startup inrush. Always consult the motor nameplate and local code for proper 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 cylindrical fuses. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Cross-referenced by specification & description
BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 3.5 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-3-1/2)
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BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 1.8 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-1-8/10)
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BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 1.8 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-1-8/10)

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