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FRN-R-40 Cartridge fuse rated 40A at 250VAC/125VDC with slow blow response and RK5 class. Features 200kA AC breaking capacity and requires a holder for mounting.
Mfr Part #:

FRN-R-40

Available from 1 distributors
Mfr Name: Eaton - Electronics Division
Eaton - Electronics Division
Cartridge fuse rated 40A at 250VAC/125VDC with slow blow response and RK5 class. Features 200kA AC breaking capacity and requires a holder for mounting.
✓ Total Stock: 7 pcs
$ Price Range: $34.92 - $52.10

FRN-R-40 Available from 1 distributor

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Bristol Electronics ✓
Non-Authorised Inventory information
7 pcs
On Request
7 pcs On Request 1 On Request On Request 2026-02-25 06:16:38 On Request On Request
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

FRN-R-40 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Applications
Approval Agency
Breaking Capacity @ Rated Voltage
Class
Current Rating (Amps)
Fuse Type
Mounting Type
Response Time
Tape & Reel
Voltage Rating
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FRN-R-40 Description

Short technical summary and product information.

The Eaton Bussmann FRN-R-40 is a 40A cartridge fuse designed for overcurrent protection in electrical and industrial applications. It is rated for 250VAC and 125VDC and offers a high breaking capacity of 200kA AC and 20kA DC, providing robust fault protection.

 

This fuse features a slow blow (time-delay) response characteristic, making it suitable for circuits with inrush currents. It belongs to the RK5 fuse class, which specifies dimensional and performance standards for industrial fuses. The FRN-R-40 requires a holder for mounting and is supplied in a non-standard cartridge case measuring 0.810" diameter by 3.00" length (20.57mm x 76.20mm).

 

The part is approved by CE, CSA, and UL, meeting key safety and regulatory requirements. It is intended for use in electrical distribution, feeder protection, and industrial equipment where reliable overcurrent interruption is critical.

FRN-R-40 Quick Information

Product Type: Cartridge Fuse
Series: FRN-R
Canonical Name: Cartridge Fuse 40A 250VAC/125VDC Slow Blow RK5
Subcategory: Cartridge Fuse

FRN-R-40 Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

FRN-R-40 Estimated Pricing

Qty Low High
1+ $52.10 $52.10
5+ $45.46 $45.46
10+ $38.50 $38.50
50+ $34.92 $34.92

Estimated market price range - modelled values for guidance only, not live distributor offers.

FRN-R-40 Features

  • Rated for 40A continuous current.
  • Slow blow response time.
  • RK5 fuse class.
  • 200kA AC breaking capacity.
  • CE, CSA, UL approved.

FRN-R-40 Applications

  • Overcurrent protection for industrial feeders.
  • Motor branch circuit protection.
  • Distribution panel protection.
  • Suitable for high inrush loads.

FRN-R-40 FAQs

7 frequently asked questions generated from this part’s specifications.
What is the current rating of the Eaton Bussmann FRN-R-40 fuse?

40 A.

What is the voltage rating of the FRN-R-40?

250 V AC / 125 V DC.

What is the breaking capacity of the FRN-R-40?

200 kA AC, 20 kA DC.

What is the response time of this fuse?

Slow Blow (time-delay).

What package or case type does the FRN-R-40 use?

Cartridge, Non-Standard (0.810" x 3.00").

What fuse class is the FRN-R-40?

RK5.

What agency approvals does the FRN-R-40 hold?

CE, CSA, UL.

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