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BUSSMANN Fuse: Class RK5, FRN-R-ID Series, Time-Delay, 40 A, 250 V AC, 125 V DC - Time-Delay Cylindrical Fuses
BUSSMANNTime-Delay Cylindrical Fuses

BUSSMANN Fuse: Class RK5, FRN-R-ID Series, Time-Delay, 40 A, 250 V AC, 125 V DC

The BUSSMANN FRN-R-ID Series Class RK5 Time-Delay Cylindrical Fuse (MPN FRN-R-40ID) is a 40 A, indicating fuse rated for 250 V AC and 125 V DC. As a time-delay fuse, it accommodates temporary inrush currents while…

SKU 3G-OTH-25289

Also listed as: FRNR40ID · FRN R 40ID

Brand
BUSSMANN
Item
Fuse: Class RK5, FRN-R-ID Series, Time-Delay, 40 A, 250 V AC, 125 V DC
Category
Time-Delay Cylindrical Fuses
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

BUSSMANN
Manufacturer Part Number
FRN-R-40ID
Series
FRN-R-ID
Type
FRN-R-ID Series, Time-Delay, 40 A, 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-ID Series Class RK5 Time-Delay Cylindrical Fuse (MPN FRN-R-40ID) is a 40 A, indicating fuse rated for 250 V AC and 125 V DC. As a time-delay fuse, it accommodates temporary inrush currents while providing overcurrent protection. 3G Electric interprets demand and sources this genuine BUSSMANN fuse across 14 industrial departments, with specialist depth in electrical components.

Frequently Asked Questions

What is the BUSSMANN FRN-R-40ID fuse used for?

The BUSSMANN FRN-R-40ID is a Class RK5 time-delay indicating fuse used for overcurrent protection in industrial motor circuits, lighting panels, and distribution equipment. Its time-delay characteristic handles inrush currents from motors and transformers, while the indicating window shows a blown fuse for faster troubleshooting.

What are the specifications of the BUSSMANN FRN-R-40ID fuse?

The BUSSMANN FRN-R-40ID is a Class RK5 time-delay indicating fuse rated 40 A, 250 V AC and 125 V DC. It belongs to the FRN-R-ID series and has a cylindrical body with a visual indicator. The manufacturer part number is FRN-R-40ID. It is designed for branch-circuit protection in industrial applications.

Where to buy the BUSSMANN FRN-R-40ID fuse worldwide?

You can source the BUSSMANN FRN-R-40ID fuse 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. 3G Electric supplies genuine BUSSMANN fuses for industrial maintenance and OEM needs.

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

To select the correct BUSSMANN FRN-R-ID series fuse, match the voltage rating (250 V AC or 125 V DC) to your system voltage and choose an amp rating that exceeds the motor full-load current by 125-150% for time-delay characteristics. The indicating feature helps identify blown fuses quickly. Always consult the manufacturer's data sheet for coordination.

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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Compatible alternatives & equivalents

Cross-referenced by specification & description
BUSSMANN Fuse: Class RK5, FRN-R-ID Series, Time-Delay, 20 A, 250 V AC, 125 V DC, Indicating (MPN FRN-R-20ID)
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BUSSMANN Fuse: Class RK5, FRN-R-ID Series, Time-Delay, 20 A, 250 V AC, 125 V DC, Indicating (MPN FRN-R-20ID)
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BUSSMANN Fuse: Class RK5, FRN-R-ID Series, Time-Delay, 10 A, 250 V AC, 125 V DC, Indicating (MPN FRN-R-10ID)

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