04371.25WR Littelfuse 04371.25WR is a 1.25A, 63V fast-acting surface mount fuse in a 1206 package. It features a 50A breaking capacity and operates from -55°C to 150°C.
Mfr Part #:

04371.25WR

Available from 1 distributors
Mfr Name: Littelfuse Inc.
Littelfuse Inc.
Littelfuse 04371.25WR is a 1.25A, 63V fast-acting surface mount fuse in a 1206 package. It features a 50A breaking capacity and operates from -55°C to 150°C.
Total Stock: 1,000 pcs

04371.25WR Available from 1 distributor

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04371.25WR Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
AEC Qualified
Approval Agency
Automotive Grade
Breaking Capacity
Breaking Capacity @ Rated Voltage
Current Rating
Current Rating (Amps)
Fuse Type
Halogen Free
Height
Industrial Grade
Length
Medical Grade
Melting I²t
Military Grade
Mounting Type
Nominal Power Dissipation
Nominal Resistance
Nominal Voltage Drop
Operating Temperature
Package / Case
Response Time
Tape & Reel
Voltage Rating
Width

04371.25WR Description

Short technical summary and product information.

The Littelfuse 04371.25WR is a 1.25A, 63V fast-acting surface mount fuse from the 437 Series. Designed for overcurrent protection in circuits that may encounter high ambient temperatures up to 150°C, this fuse offers excellent temperature stability and performance reliability.

 

Key electrical specifications include a nominal resistance of 0.318 Ω, a voltage drop of 0.4V at rated current, and a power dissipation of 0.5W. The melting I²t is 0.257 A²s, providing high inrush current withstand capability typical of Littelfuse ceramic fuses.

 

The fuse is housed in a 1206 (3216 Metric) surface mount package with dimensions 3.20mm x 1.63mm x 0.82mm. It is UL and CSA approved, 100% lead-free, halogen-free, and RoHS compliant. The operating temperature range is -55°C to 150°C.

04371.25WR Quick Information

Product Type: Surface Mount Fuse
Series: 437
Canonical Name: Littelfuse 04371.25WR 1.25A 63V Fast-Acting Surface Mount Fuse
Subcategory: Fast-Acting Fuse

04371.25WR Compliance

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

04371.25WR Features

  • 1.25A current rating at 63V AC/DC.
  • Fast-acting response time for overcurrent protection.
  • 50A breaking capacity at rated voltage.
  • Surface mount 1206 package (3216 metric).
  • Operating temperature range -55°C to 150°C.

04371.25WR Applications

  • Overcurrent protection in high-temperature circuits.
  • Board-level protection in power supplies.
  • Use in automotive and industrial electronics.
  • Protection for DC/DC converters and inverters.

04371.25WR FAQs

7 frequently asked questions generated from this part’s specifications.
What is the current rating of the 04371.25WR?

The current rating is 1.25 A.

What is the voltage rating?

The voltage rating is 63 V AC/DC.

What is the breaking capacity?

The breaking capacity is 50 A at rated voltage (63 V AC/DC).

What is the response time of this fuse?

The response time is fast blow (fast-acting).

What package is the 04371.25WR available in?

The fuse is in a 1206 (3216 Metric) surface mount package.

What is the operating temperature range?

The operating temperature range is -55°C to 150°C.

Is the 04371.25WR RoHS compliant?

Yes, it is RoHS compliant, 100% lead-free, and halogen-free.

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