n Slow blow thin film chip fuse for overcurrent protection
n 1005 (EIA 0402) miniature footprint
n Surface mount packaging for automated assembly
n UL listed (UL 248-14)
n RoHS compliant* and halogen free**
Electrical Characteristics
SF-0402S Series - Slow Blow Surface Mount Fuses
Model
Rated Current
(Amps)
Fusing Time
Resistance
(mΩ) Typ.***
Rated
Voltage
Breaking
Capacity
Typical
I
2
t (A
2
s) ****
SF-0402S050 0.50
Open within 5
sec. at 250 %
rated current
300
DC 32 V DC 32 V 35 A
0.00370
SF-0402S080 0.80 78 0.00947
SF-0402S100 1.00 75 0.01479
SF-0402S125 1.25 44 0.02310
SF-0402S150 1.50 34.5 0.02400
SF-0402S160 1.60 29.5 0.03734
SF-0402S200 2.00 23 0.04040
SF-0402S250 2.50 18 0.06760
SF-0402S300 3.00 15 0.09860
SF-0402S315 3.15 14 0.10868
SF-0402S400 4.00 10 0.11450
Reliability Testing
SinglFuse
™
SF-0402S Series Features
*** Resistance value was measured with less than 10 % of rated current. Tolerance ±25 %.
****Typical I
2
t value is measured at 10x rated current.
No. Test Requirement Test Condition
1 Carrying Capacity No fusing Rated current, 4 hours
2 Fusing Time Within 5 seconds 250 % of its rated current
3 Interrupting Ability No mechanical damages
After the fuse is interrupted, rated voltage applied
for 30 seconds again
4 Bending Test No mechanical damages
Distance between holding points: 90 mm,
Bending: 3 mm,1 time, 30 seconds
5 Resistance to Solder Heat ±20 % 260 °C ±5 °C,10 seconds ±1 second
6 Solderability 95 % coverage minimum
235 °C ±5 °C, 2 ±0.5 second
245 °C ±5 °C, 2 ±0.5 second (lead free)
7 Temperature Rise <75 ° C
100 % of its rated current, measure of surface
temperature
8 Resistance to Dry Heat ±20 % 105 °C ±5 °C,1000 hours
9 Resistance to Solvent
No evident damage on protective coating
and marking
23 °C ±5 °C of isopropyl alcohol, 90 seconds
10 Residual Resistance 10k ohms or more Measure DC resistance after fusing
11 Thermal Shock DR < 10 % -20 °C / +25 °C /+125 °C /+25 °C, 10 cycles
Operating Temperature .......................................-20 °C to +105 °C
Storage Conditions
Temperature .....................................................+5 °C to +35 °C
Humidity................................................................40 % to 75 %
Shelf Life................................ 2 years from manufacturing date
Moisture Sensitivity Level ............................................................. 1
ESD Classication (HBM)...................................................Class 6
Environmental Characteristics
WARNING Cancer and Reproductive Harm
www.P65Warnings.ca.gov
* RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU
June 8, 2011.
** Bourns considers a product to be “halogen free” if (a) the Bromine (Br) content is 900 ppm or
less; (b) the Chlorine (Cl) content is 900 ppm or less; and (c) the total Bromine (Br) and
Chlorine (Cl) content is 1500 ppm or less.
“SinglFuse” is a trademark of Bourns, Inc.
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth
on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
UL File Number ............................................................... E198545
Agency Recognition
n Portable memory
n LCD monitors
n Disk drives
n PDAs
n Digital cameras
n DVDs
n Cell phones
n Rechargeable battery packs
n Battery chargers
n Set top boxes
n Industrial controllers
SF-0402S Series - Slow Blow Surface Mount Fuses
Product Dimensions
Recommended Pad Layout
1.0 ± 0.1
(.039 ± .004)
0.2 ± 0.1
(.008 ± .004)
0.5 ± 0.1
(.020 ± .004)
0.2 ± 0.1
(.008 ± .004)
0.25 ± 0.1
(.010 ± .004)
0.25 ± 0.1
(.010 ± .004)
0.35 ± 0.05
(.014 ± .002)
0.52 ± 0.05
(.020 ± .002)
1.5 ± 0.1
(.059 ± .004)
0.55 ± 0.05
(.022 ± .002)
1.0 ± 0.1
(.039 ± .004)
0.2 ± 0.1
(.008 ± .004)
0.5 ± 0.1
(.020 ± .004)
0.2 ± 0.1
(.008 ± .004)
0.25 ± 0.1
(.010 ± .004)
0.25 ± 0.1
(.010 ± .004)
0.35 ± 0.05
(.014 ± .002)
0.52 ± 0.05
(.020 ± .002)
1.5 ± 0.1
(.059 ± .004)
0.55 ± 0.05
(.022 ± .002)
DIMENSIONS:
MM
(INCHES)
Thermal Derating Curve
120
110
100
90
80
-20 02040
AMBIENT TEMPERATURE (°C)
PERCENT OF RATING (%)
60 80 100 120
Construction & Material Content
OVERCOAT
Sn PLATING
CERAMIC SUBSTRATE
FUSE ELEMENT
Cu / Ni PLATING
1.0 ± 0.1
(.039 ± .004)
0.2 ± 0.1
(.008 ± .004)
0.5 ± 0.1
(.020 ± .004)
0.2 ± 0.1
(.008 ± .004)
0.25 ± 0.1
(.010 ± .004)
0.25 ± 0.1
(.010 ± .004)
0.35 ± 0.05
(.014 ± .002)
0.52 ± 0.05
(.020 ± .002)
1.5 ± 0.1
(.059 ± .004)
0.55 ± 0.05
(.022 ± .002)
SinglFuse
™
SF-0402S Series Applications
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
Typical Part Marking
Represents total content. Layout may
vary.
How to Order
SF - 0402 S 050 - 2
SinglFuse™
Product Designator
SMD Footprint
1005 (EIA 0402) size
Fuse Blow Type
S = Slow blow
Rated Current
050-400 (500 mA - 4.00 A)
Packaging Type
- 2 = Tape & Reel (10,000 pcs./reel)
RATED CURRENT (A)
D = 0.315
F = 0.50
V = 0.75
K = 0.80
L = 1.00
M = 1.25
P = 1.50
N = 1.60
S = 2.00
T = 2.50
3 = 3.00
U = 3.15
W = 4.00
10,000 pieces per 7-inch reel
Packaging Quantity