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BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 125 A, 250 V AC, 125 V DC - Time-Delay Blade Fuses
BUSSMANNTime-Delay Blade Fuses

BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 125 A, 250 V AC, 125 V DC

The BUSSMANN FRN-R-125 is a Class RK5, time-delay blade fuse from the FRN-R Series, rated for 125 A at 250 V AC and 125 V DC. This non-indicating fuse is designed for overcurrent protection in industrial electrical…

SKU 3G-OTH-26489

Also listed as: FRNR125 · FRN R 125

Brand
BUSSMANN
Item
Fuse: Class RK5, FRN-R Series, Time-Delay, 125 A, 250 V AC, 125 V DC
Category
Time-Delay Blade Fuses
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Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

BUSSMANN
Manufacturer Part Number
FRN-R-125
Series
FRN-R
Type
FRN-R Series, Time-Delay, 125 A, Non-Indicating
AC
250 V
DC
125 V

Technical Documents

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BUSSMANN Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The BUSSMANN FRN-R-125 is a Class RK5, time-delay blade fuse from the FRN-R Series, rated for 125 A at 250 V AC and 125 V DC. This non-indicating fuse is designed for overcurrent protection in industrial electrical systems, supporting motor and equipment circuits where high inrush currents are present.

Frequently Asked Questions

What is the BUSSMANN FRN-R-125 fuse used for?

The BUSSMANN FRN-R-125 is a Class RK5 time-delay fuse designed for motor and transformer protection in industrial power distribution. It handles high inrush currents without nuisance opening, making it suitable for circuits with inductive loads up to 125 A at 250 V AC or 125 V DC.

What are the specifications of the BUSSMANN FRN-R-125 fuse?

The BUSSMANN FRN-R-125 is a Class RK5, time-delay, non-indicating fuse rated 125 A at 250 V AC and 125 V DC. It belongs to the FRN-R series and is manufactured under MPN FRN-R-125. The fuse is designed for overcurrent protection in branch circuits and motor loads.

Where to buy BUSSMANN FRN-R-125 fuses worldwide?

You can source BUSSMANN FRN-R-125 fuses through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time on this Class RK5 time-delay fuse.

How to select the correct BUSSMANN FRN-R fuse for an application?

To select the correct BUSSMANN FRN-R fuse, match the voltage rating (250 V AC or 125 V DC) and current rating (125 A) to your circuit requirements. The time-delay feature accommodates motor start-up surges. Verify the Class RK5 rejection feature prevents substitution with lower-rated fuses.

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, FRN-R Series, Time-Delay, 200 A, 250 V AC, 125 V DC, Non-Indicating (MPN FRN-R-200)
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BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 200 A, 250 V AC, 125 V DC, Non-Indicating (MPN FRN-R-200)
BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 125 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-125)
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BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 125 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-125)
BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 75 A, 250 V AC, 125 V DC, Non-Indicating (MPN FRN-R-75)
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BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 75 A, 250 V AC, 125 V DC, Non-Indicating (MPN FRN-R-75)
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BUSSMANN Fuse: Class RK5, FRN-R Series, Time-Delay, 3.5 A, 250 V AC, 125 V DC, Non-Indicating (MPN FRN-R-3-1/2)
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, 200 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-200)
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BUSSMANN Fuse: Class RK5, FRS-R Series, Time-Delay, 200 A, 600 V AC, 300 V DC, Non-Indicating (MPN FRS-R-200)

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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)
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