RUEF090 Littelfuse RUEF090 is a polymeric PTC resettable fuse with a hold current of 900 mA and maximum voltage of 30V. It is a through-hole radial leaded device with a time to trip of 5.9 seconds at 4.5A.
Mfr Part #:

RUEF090

Available from 2 distributors
Mfr Name: Littelfuse Inc.
Littelfuse Inc.
Littelfuse RUEF090 is a polymeric PTC resettable fuse with a hold current of 900 mA and maximum voltage of 30V. It is a through-hole radial leaded device with a time to trip of 5.9 seconds at 4.5A.
Total Stock: 1,485 pcs
$ Price Range: $0.19 - $0.43

RUEF090 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
1,085 pcs
1085 pcs On Request 1 On Request On Request 1821+ On Request On Request
Non-Authorised Inventory information
400 pcs
400 pcs On Request 1 On Request On Request On Request On Request On Request

RUEF090 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
Height
Lead Spacing
Lead Style
Max Fault Current (Imax)
Mounting Type
Operating Temperature
Power Dissipation (PD)
Resistance
Tape & Reel
Time to Trip
Trip Current (IT)
Type
Voltage

RUEF090 Description

Short technical summary and product information.

The RUEF090 is a polymeric PTC resettable fuse manufactured by Littelfuse. It provides overcurrent protection with a hold current of 900 mA (20°C still air) and a trip current of 1.8 A. The device can withstand a maximum voltage of 30V and a fault current of up to 100 A. Power dissipation in the tripped state is 0.9 W.

 

The initial resistance ranges from 0.22 Ω (min) to 0.45 Ω (max). The time to trip at 4.5 A is 5.9 seconds maximum. The operating temperature range is -40°C to 85°C.

 

This fuse is packaged in a through-hole radial disc package with a lead spacing of 5.05 mm. The dimensions are 0.291" diameter by 0.118" thickness (7.40 mm x 3.00 mm), with a maximum seated height of 12.20 mm. It is suitable for board-level overcurrent protection in low-voltage power supplies, battery circuits, and general electronics.

RUEF090 Quick Information

Product Type: PTC Resettable Fuse
Series: RUEF
Canonical Name: Littelfuse RUEF090 Polymeric PTC Resettable Fuse
Subcategory: Radial Leaded PTC Resettable Fuse

RUEF090 Compliance

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

RUEF090 Estimated Pricing

Qty Low High
1+ $0.43 $0.43
10+ $0.40 $0.40
50+ $0.33 $0.33
100+ $0.30 $0.30
250+ $0.27 $0.27
500+ $0.25 $0.25
1,000+ $0.23 $0.23
5,000+ $0.19 $0.19

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

RUEF090 Features

  • Polymeric PTC resettable overcurrent protection.
  • 900 mA hold current rating at 20°C.
  • 30V maximum operating voltage.
  • 100 A maximum fault current capability.
  • Through-hole radial leaded package.

RUEF090 Applications

  • Overcurrent protection for low voltage power supplies.
  • Protection in battery charging circuits.
  • Resettable fuse for automotive electronics.
  • Suitable for industrial control systems.

RUEF090 FAQs

7 frequently asked questions generated from this part’s specifications.
What is the hold current of the RUEF090?

The hold current (IH) is 900 mA at 20°C still air.

What is the maximum voltage rating?

The maximum voltage is 30V.

What is the maximum fault current?

The maximum fault current (IMAX) is 100 A.

What is the time to trip?

The time to trip at 4.5 A is 5.9 seconds maximum.

What package is the RUEF090 available in?

It is a through-hole radial disc package with 5.05 mm lead spacing.

What is the trip current?

The trip current (IT) is 1.8 A at 20°C still air.

What is the operating temperature range?

The operating temperature range is -40°C to 85°C.

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