Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
BUSSMANN FRN-R-40ID Class RK5 Time-Delay Indicating Cylindrical Fuse - Time-Delay Cylindrical Fuses
BUSSMANNTime-Delay Cylindrical Fuses

BUSSMANN FRN-R-40ID Class RK5 Time-Delay Indicating Cylindrical Fuse

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
FRN-R-40ID Class RK5 Time-Delay Indicating Cylindrical Fuse
Part Number
FRN-R-40ID
Category
Time-Delay Cylindrical Fuses
Available to Order
Also known as:FRN-R-40IDBUSSMANN
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

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

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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 drives — BUSSMANN FWC series fast-acting cylindrical fuses protect power semiconductors in AC/DC drive circuits.
Control transformers — BUSSMANN FNQ-R series time-delay fuses handle inrush currents in control power circuits.
Semiconductor protection — BUSSMANN KAC series bolt-on fuses safeguard diodes, thyristors, and IGBTs in AC-only applications.
Electrical panels — BUSSMANN FP-2, FP-3, FP-4, and FP-6 fuse pullers enable safe fuse replacement in distribution panels.
Automotive electrical systems — BUSSMANN FP-A3 fuse puller removes and installs 1/4 in and 1/2 in automotive fuses.
Power supplies — BUSSMANN FWC series fuses provide overcurrent protection in AC/DC power supply circuits.
Not sure this is the right part? Photo-identify it

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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

More from BUSSMANN

View all BUSSMANN parts
Time-delay cylindrical fuse rated at 3.2 A and 250 V AC, with dimensions of 1/4 in x 1 1/4 in. Provides overcurrent protection in circuits where temporary inrush currents occur, such as motors and control circuits, preventing nuisance blowing while safeguarding against sustained faults
BUSSMANN
Time-delay cylindrical fuse rated at 3.2 A and 250 V AC, with dimensions of 1/4 in x 1 1/4 in. Provides overcurrent protection in circuits where temporary inrush currents occur, such as motors and control circuits, preventing nuisance blowing while safeguarding against sustained faults
BUSSMANN
BUSSMANN
R-rated, 2.4 kV AC, 100 A time-delay indicating fuse from the JCH Series. Provides overcurrent protection in medium-voltage industrial power distribution systems, such as motor circuits and switchgear
Time-delay cylindrical fuse rated 8 A, 250 V AC. Midget size, 13/32 x 1-1/2 in, non-indicating. Provides overcurrent protection with delayed response for inductive loads in control panels, motor circuits, and lighting systems
BUSSMANN
Time-delay cylindrical fuse rated 8 A, 250 V AC. Midget size, 13/32 x 1-1/2 in, non-indicating. Provides overcurrent protection with delayed response for inductive loads in control panels, motor circuits, and lighting systems
Time-delay cylindrical fuse rated 2.5 A at 250 V AC, 5 mm x 20 mm package. Designed for overcurrent protection in circuits with inductive loads such as motors and transformers, accommodating temporary inrush currents
BUSSMANN
Time-delay cylindrical fuse rated 2.5 A at 250 V AC, 5 mm x 20 mm package. Designed for overcurrent protection in circuits with inductive loads such as motors and transformers, accommodating temporary inrush currents
BUSSMANN
BUSSMANN
R-rated time-delay cylindrical fuse rated 4.8 kV AC and 450 A. Indicating feature provides visual blown-fuse indication. Used for overcurrent protection in medium voltage motor circuits, transformers, and switchgear where coordination with downstream devices and inrush current handling is required
Time-delay cylindrical fuse rated 1.5 A, 250 V AC, with 1/4 in x 1 1/4 in dimensions. Designed for overcurrent protection in circuits with moderate inrush currents, such as motors, transformers, and control panels
BUSSMANN
Time-delay cylindrical fuse rated 1.5 A, 250 V AC, with 1/4 in x 1 1/4 in dimensions. Designed for overcurrent protection in circuits with moderate inrush currents, such as motors, transformers, and control panels
BUSSMANN
BUSSMANN
R-Rated time-delay cylindrical fuse for medium-voltage overcurrent protection. Rated 4.8 kV AC and 700 A with indicating feature for visual blown-fuse indication. Suitable for motor circuits and transformer protection where inrush currents require time-delay characteristics
BUSSMANN
BUSSMANN
R-rated time-delay cylindrical fuse rated 4.8 kV AC and 650 A. Indicating feature provides visual blown-fuse indication. Used for overcurrent protection in medium-voltage circuits, coordinating with other protective devices and handling inrush currents from motors and transformers

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first