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RUSBF120-2 Littelfuse RUSBF120-2 is a 6V, 1.2A hold current PTC resettable fuse in a radial leaded package. It features a maximum trip time of 500ms at 8A and low resistance.
Mfr Part #:

RUSBF120-2

Available from 1 distributors
Mfr Name: Littelfuse Inc.
Littelfuse Inc.
Littelfuse RUSBF120-2 is a 6V, 1.2A hold current PTC resettable fuse in a radial leaded package. It features a maximum trip time of 500ms at 8A and low resistance.
Total Stock: 1,325 pcs
$ Price Range: $0.28

RUSBF120-2 Available from 1 distributor

Authorised
Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Non-Authorised Inventory information
1,325 pcs
1325 pcs On Request 1 On Request On Request On Request On Request On Request

RUSBF120-2 Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
Halogen Free
Height
Lead Size
Lead Spacing
Lead Style
Length
Max Fault Current (Imax)
Mounting Type
Operating Temperature
Power Dissipation (PD)
Resistance
Resistance (Maximum @ One hour post trip at 20 °C)
SVHC Present
Tape & Reel
Time to Trip
Trip Current (IT)
Type
Voltage
Width

RUSBF120-2 Description

Short technical summary and product information.

The Littelfuse RUSBF120-2 is a polymeric PTC resettable fuse designed for overcurrent protection in low-voltage circuits. It has a hold current of 1.2A at 20°C still air and a trip current of 2.0A minimum. The device can withstand a maximum voltage of 6V DC and a fault current of 40A. Power dissipation in the tripped state is 0.6W typical. The maximum time to trip at 8.0A is 500ms. Resistance values are 70mΩ minimum, 97.5mΩ maximum as supplied, and 140mΩ maximum one hour after trip. The operating temperature range is -40°C to 85°C. The RUSBF120-2 comes in a radial leaded disc package with 5.08mm lead spacing and 24 AWG lead size. It is RoHS compliant, lead-free, and halogen-free. This fuse is suitable for applications requiring resettable overcurrent protection in compact through-hole designs.

RUSBF120-2 Quick Information

Product Type: PTC Resettable Fuse
Series: RUSBF
Canonical Name: Littelfuse RUSBF120-2 PTC Resettable Fuse, 6V, 1.2A Hold, Radial Leaded
Subcategory: Radial Leaded PTC Resettable Fuse

RUSBF120-2 Compliance

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

RUSBF120-2 Estimated Pricing

Qty Low High
3,000+ $0.28 $0.28

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

RUSBF120-2 Features

  • Hold current of 1.2A at 20°C still air.
  • Trip current of 2.0A minimum.
  • Maximum voltage rating of 6V DC.
  • Fast trip time of 500ms at 8A.
  • Low resistance of 70mΩ minimum.

RUSBF120-2 Applications

  • Overcurrent protection in low-voltage circuits.
  • Resettable protection for battery-powered devices.
  • Used in automotive and industrial electronics.
  • Ideal for USB and peripheral port protection.
  • Suitable for power supply output protection.

RUSBF120-2 FAQs

5 frequently asked questions generated from this part’s specifications.
What is the hold current of the RUSBF120-2?

1.2A at 20°C still air.

What is the maximum voltage rating?

6V DC.

What is the maximum fault current the RUSBF120-2 can withstand?

40A at rated voltage.

What is the time to trip at 8A?

500ms maximum.

What is the package type?

Radial, Disc through-hole package.

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