Have a small number of parts or want to add parts manually? Request Quote manually

Search across all market segments

RUEF400 PTC resettable fuse from Littelfuse with 4A hold current, 30V maximum voltage, and 50 mΩ initial resistance. Through-hole radial package.
Mfr Part #:

RUEF400

Available from 2 distributors
Mfr Name: Littelfuse Inc.
Littelfuse Inc.
PTC resettable fuse from Littelfuse with 4A hold current, 30V maximum voltage, and 50 mΩ initial resistance. Through-hole radial package.
Total Stock: 1,555 pcs
$ Price Range: $0.28 - $0.61

RUEF400 Available from 2 distributors

Authorised
Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Non-Authorised Inventory information
1,500 pcs
1500 pcs On Request 1 On Request On Request On Request On Request On Request
Non-Authorised Inventory information
55 pcs
55 pcs On Request 1 On Request On Request On Request On Request On Request

RUEF400 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
Height
Lead Spacing
Length
Mounting Type
Operating Temperature
Resistance
Tape & Reel
Time to Trip
Type
Voltage
Width

RUEF400 Description

Short technical summary and product information.

The RUEF400 is a polymeric PTC resettable fuse from Littelfuse designed for overcurrent protection. It has a hold current of 4 A and a maximum voltage rating of 30 V. The initial resistance is 50 mΩ, ensuring low power loss during normal operation. Under fault conditions, the typical trip time is 12.7 seconds (at rated fault current). The device operates over a wide temperature range of -40°C to 85°C.

 

Packaged in a radial disc format, the RUEF400 features through-hole mounting with a lead spacing of 5.05 mm. Its dimensions are 14.00 mm in length, 3.00 mm in width, and 19.30 mm in height. The polymeric PTC technology provides resettable protection, making it suitable for applications where overcurrent conditions may occur.

RUEF400 Quick Information

Product Type: PTC Resettable Fuse
Series: RUEF
Canonical Name: PTC Resettable Fuse 4A 30V Radial
Subcategory: Polymeric PTC

RUEF400 Compliance

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

RUEF400 Estimated Pricing

Qty Low High
1+ $0.61 $0.61
10+ $0.55 $0.55
50+ $0.47 $0.47
100+ $0.43 $0.43
250+ $0.39 $0.39
500+ $0.36 $0.36
1,000+ $0.33 $0.33
5,000+ $0.28 $0.28

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

RUEF400 Features

  • 4A hold current, 30V max voltage.
  • 50 mΩ initial resistance for low power loss.
  • 12.7s typical trip time at fault.
  • Wide operating temperature -40°C to 85°C.
  • Through-hole radial package for easy mounting.

RUEF400 Applications

  • Overcurrent protection in power supplies.
  • Used in battery charging circuits.
  • Ideal for motor control protection.
  • General purpose circuit protection.

RUEF400 FAQs

7 frequently asked questions generated from this part’s specifications.
What is the hold current of the RUEF400?

4 A.

What is the maximum voltage rating?

30 V.

What is the initial resistance?

50 mΩ.

What is the typical trip time?

12.7 seconds under specified test conditions.

What is the operating temperature range?

-40°C to 85°C.

What is the package type?

Radial, Disc, through-hole mount.

What are the dimensions?

14.00 mm x 3.00 mm x 19.30 mm.

Home
Categories
Submit RFQ
Login
Account

Categories