USF 0402  Surface Mount Fuse, 1.05 x 0.55 mm, Super-Quick-Acting FF, 32 VDC

Series: USF 0402

Surface Mount Fuse, 1.05 x 0.55 mm, Super-Quick-Acting FF, 32 VDC

Free Sample Request

14 Variants


  • UL characteristic
  • Low melting I²t-values, fast interruption
  • Marking optional
  • Impermeable to potting compound

Unique Selling Proposition

  • Space constrained applications


  • Secondary Protection
  • Circuits without inrush
  • Semiconductor protection
  • Digital Consumer Electronics

Rated Voltage

32 VDC

Rated current

0.25 - 5 A

Breaking Capacity

35 A


Super-Quick-Acting FF



Admissible Ambient Air Temp.

-55 °C to 90 °C

Climatic Category

55/125/21 acc. to IEC 60068-1

Material: Housing


Material: Terminals

Gold-Plated Copper Alloy

Unit Weight

0.004 g

Storage Conditions

0 °C to 60 °C, max. 70% r.h.

Product Marking

see table of variants

Soldering Methods

Soldering Profile


245 °C / 3 sec acc. to IEC 60068-2-58, Test Td

Resistance to Soldering Heat

260 +0/-5 °C / 30 sec acc. to IPC/JEDEC J-STD-020D, Level 1

Moisture Sensitivity Level

MSL 1, J-STD-020 

Case Resistance

acc. to EIA/IS-722, Test 4.7
>100 MΩ (between leeds and body)


min. UL 94V-1
(acc. to EIA/IS-722, Test 4.12)

Moisture Resistance Test

MIL-STD-202, Method 106
(50 cycles in a temp./mister chamber)

Resistance to Solvents

MIL-STD-202, Method 215

Terminal Strength

MIL-STD-202, Method 211A
(Deflection of board 1 mm for 1 minute)

Detailed information on product approvals, code requirements, usage instructions and detailed test conditions can be looked up in  Details about Approvals
SCHURTER products are designed for use in industrial environments. They have approvals from independent testing bodies according to national and international standards. Products with specific characteristics and requirements such as required in the automotive sector according to IATF 16949, medical technology according to ISO 13485 or in the aerospace industry can be offered exclusively with customer-specific, individual agreements by SCHURTER.


The approval mark is used by the testing authorities to certify compliance with the safety requirements placed on electronic products.

Approval Reference Type: USF 0402

Approval Logo Certificates Certification Body Description
Approval marks UR UL UR File Number:
Approval marks CSA CSA CSA Certification Record: 248899

Product standards

Product standards that are referenced

Organization Design Standard Description
Partners UL_Certification_Body Designed according to UL 248-14 Low voltage fuses - Part 14: Supplemental fuses
Partners CSA_Certification_Body Designed according to CSA22.2 No. 248.14 Low-Voltage Fuses - Part 14: Supplemental Fuses

Application standards

Application standards where the product can be used

Organization Design Standard Description
Partners IEC_Certification_Body Suitable for applications acc. IEC/UL 62368-1 Audio/video, information and communication technology equipment - Part 1: Safety requirements


The product complies with following Guide Lines

Identification Details Initiator Description
Environment_Safety RoHS_Logo_color_CMYK_tif SCHURTER AG Directive RoHS 2011/65/EU, Amendment (EU) 2015/863
Environment_Safety Halogenfrei_Logo_Farbig SCHURTER AG SCHURTER strives to offer our customers halogen free products.
Environment_Safety REACH SCHURTER AG On 1 June 2007, Regulation (EC) No 1907/2006 on the Registration, Evaluation, Authorization and Restriction of Chemicals 1 (abbreviated as "REACH") entered into force.


Dimension [mm]

Soldering pads

Derating Curves

Percentage of Rating [%]
Ambient Temperature [°C]

Pre-Arcing Time

Rated Current In 1.0 x In min 2.0 x In max 3.0 x In max
0.25 A 4 h - 5 s
0.375 A - 5 A 4 h 5 s 0.2 s


Time in Seconds
Current in Amperes

Short Table of Variants USF 0402 Open complete table USF 0402

Rated Current [A] Rated Voltage [VDC] Marking Order Number

Variant Details

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A=Most Popular

A=Most Popular

Most popular products have the following customer benefits:
- previously ordered by multiple customers
- generally in stock for immediate delivery
- early adoption or mature life cycle
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Free Sample

Free Sample

Please ask for free sample in order to check if the products meets your requirement for your application. Send your delivery adress and your specific requirements.

Distributor Stock Check

Distributor Stock Check

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0.25 32 Components Logo 3414.0111.26 ...
0.375 32 Components Logo 3414.0112.26 ...
0.5 32 Components Logo 3414.0113.26 ...
0.75 32 Components Logo 3414.0114.26 ...
1 32 Components Logo 3414.0115.26 ...
1.25 32 Components Logo 3414.0116.26 ...
1.5 32 Components Logo 3414.0117.26 ...
1.75 32 Components Logo 3414.0118.26 ...
2 32 Components Logo 3414.0119.26 ...
2.5 32 Components Logo 3414.0120.26 ...
3 32 Components Logo 3414.0121.26 ...
3.5 32 Components Logo 3414.0122.26 ...
4 32 Components Logo 3414.0123.26 ...
5 32 Components Logo 3414.0124.26 ...
1) 35 A @ 32 VDC

Packaging Unit
acc. IEC 60286-3 Type 1b
.xx = .26 10000 pcs. in tape [W: 8mm and P1: 2mm] on reel [A: 18cm]


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