Features
■ Compact design to save board space -
0603 footprint
■ Small size results in very fast time to react
to fault events
■ Low profi le
■ RoHS compliant* and halogen free**
■ Agency recognition:
Applications
■ USB port protection
■ HDMI 1.4 Source protection
■ PC motherboards - Plug and Play
protection
■ Mobile phones - Battery and port
protection
■ PDAs / digital cameras
MF-FSMF Series - PTC Resettable Fuses
* RoHS Directive 2002/95/EC Jan 27, 2003 including Annex.
**Bourns follows the prevailing defi nition of “halogen free” in the industry. 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.
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
Electrical Characteristics
*RoHS COMPLIANT
Model V max.
Volts
I max.
Amps
Ihold Itrip Resistance Max. Time
To Tr i p
Tripped
Power
Dissipation
Amperes
at 23 °C
Ohms
at 23 °C
Amperes
at 23 °C
Seconds
at 23 °C
Watts
at 23 °C
Hold Trip RMin. R1Max. Typ.
MF-FSMF010X 15 40 0.10 0.30 0.900 6.000 0.50 1.00 0.5
MF-FSMF020X 9 40 0.20 0.50 0.550 3.500 1.00 0.60 0.5
MF-FSMF035X 6 40 0.35 0.75 0.200 1.400 8.00 0.10 0.5
MF-FSMF050X 6 40 0.50 1.00 0.100 0.800 8.00 0.10 0.5
Environmental Characteristics
Operating Temperature ......................................... -40 °C to +85 °C
Maximum Device Surface Temperature
in Tripped State .................................................. 125 °C
Passive Aging ....................................................... +85 °C, 1000 hours ..................................... ±5 % typical resistance change
Humidity Aging ..................................................... +85 °C, 85 % R.H. 1000 hours ................... ±5 % typical resistance change
Thermal Shock ..................................................... +85 °C to -40 °C, 20 times ......................... ±10 % typical resistance change
Solvent Resistance ............................................... MIL-STD-202, Method 215 ......................... No change
Vibration ............................................................... MIL-STD-883C, Method 2007.1, ................ No change
Condition A
Test Procedures And Requirements For Model MF-FSMF Series
Test Test Conditions Accept/Reject Criteria
Visual/Mech. ......................................................... Verify dimensions and materials ................. Per MF physical description
Resistance ............................................................ In still air @ 23 °C ........................................ Rmin ≤ R ≤ R1max
Time to Trip ........................................................... At specifi ed current, Vmax, 23 °C .............. T ≤ max. time to trip (seconds)
Hold Current ......................................................... 30 min. at Ihold ........................................... No trip
Trip Cycle Life ....................................................... Vmax, Imax, 100 cycles .............................. No arcing or burning
Trip Endurance ..................................................... Vmax, 48 hours ........................................... No arcing or burning
Solderability .......................................................... ANSI/J-STD-002 ......................................... 95 % min. coverage
UL File Number .................................................... E174545
http://www.ul.com/ Follow link to Certifi cations, then UL File No., enter E174545
TÜV Certifi cate Number ....................................... R 50171531
http://www.tuvdotcom.com/ Follow link to “other certifi cates”, enter File No. 50171531
Thermal Derating Chart - Ihold (Amps)
Model
Ambient Operating Temperature
-40 °C -20 °C 0 °C 23 °C 40 °C 50 °C 60 °C 70 °C 85 °C
MF-FSMF010X 0.13 0.12 0.11 0.10 0.08 0.07 0.06 0.05 0.03
MF-FSMF020X 0.27 0.25 0.23 0.20 0.17 0.14 0.12 0.10 0.07
MF-FSMF035X 0.47 0.41 0.38 0.35 0.29 0.26 0.24 0.20 0.14
MF-FSMF050X 0.67 0.59 0.54 0.50 0.41 0.37 0.34 0.29 0.20
“freeXpansion Design” is a trademark of Bourns, Inc.
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
MF-FSMF Series - PTC Resettable Fuses
Product Dimensions
DIMENSIONS: MM
(INCHES)
Additional Applications
■ Automotive electronic control modules
■ Game console port protection
Model ABCD
Min. Max. Min. Max. Min. Max. Min.
MF-FSMF010X 1.45
(0.057)
1.85
(0.073)
0.65
(0.026)
1.05
(0.041)
0.30
(0.012)
0.65
(0.026)
0.20
(0.008)
MF-FSMF020X 1.45
(0.057)
1.85
(0.073)
0.65
(0.026)
1.05
(0.041)
0.30
(0.012)
0.65
(0.026)
0.20
(0.008)
MF-FSMF035X 1.45
(0.057)
1.85
(0.073)
0.65
(0.026)
1.05
(0.041)
0.30
(0.012)
0.65
(0.026)
0.20
(0.008)
MF-FSMF050X 1.45
(0.057)
1.85
(0.073)
0.65
(0.026)
1.05
(0.041)
0.65
(0.026)
1.00
(0.039)
0.20
(0.008)
Packaging: MF-FSMF010X = 5000 pcs. per reel;
MF-FSMF020X & MF-FSMF035X = 6000 pcs. per reel;
MF-FSMF050X = 4000 pcs. per reel
A
B1.00 ± 0.05
(.039 ± .002)
C
Top View Bottom View Side View Recommended Pad Layout
D
I
1.00 ± 0.05
(.039 ± .002)
0.70 ± 0.05
(.028 ± .002)
Terminal material:
Nickel/gold plated.
Termination pad solderability:
Standard Au fi nish:
Meets ANSI/J-STD-002 Category 2.
Recommended Storage:
40 °C max./70 % RH max.
How To Order
MF - FSMF 020 X - 2
Multifuse® Product
Designator
Series
FSMF = 0603 Surface Mount
Component
Hold Current, Ihold
010-050 (0.10 - 0.50 Amps)
Multifuse® freeXpansion™ Design
Packaging
Packaged per EIA 481-1
-2 = Tape and Reel
Typical Part Marking
PART IDENTIFICATION:
MF-FSMF010X = II
MF-FSMF020X = I
MF-FSMF035X = •
MF-FSMF050X = —
BIWEEKLY DATE CODE WILL APPEAR ON THE PACKAGING LABEL:
WEEK 1 AND 2 = A
WEEK 51 AND 52 = Z
I
Solder Refl ow Recommendations
Notes:
• MF-FSMF models cannot be wave soldered. Please contact Bourns for hand soldering
recommendations.
• If refl ow temperatures exceed the recommended profi le, devices may not meet the
performance requirements.
• Compatible with Pb and Pb-free solder refl ow profi les.
• Excess solder may cause a short circuit, especially during hand soldering. Please refer to
the Multifuse® Polymer PTC Soldering Recommendation guidelines.
160–220
300
250
200
150
100
50
0
10–20
Temperature (°C)
120
Preheating Soldering Cooling
Time (seconds)
Typical Time to Trip at 23 °C
The Time to Trip curves represent typical performance of a device in a simulated application environment. Actual performance in specifi c
customer applications may differ from these values due to the infl uence of other variables.
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
MF-FSMF Series - PTC Resettable Fuses
MF-FSMF SERIES, REV. G, 05/11
0.001
0.01
0.1
1
10
100
0.1 1 10
Fault Current (Amps)
Time to Trip (Seconds)
MF-FSMF020X
MF-FSMF010X
MF-FSMF035X
MF-FSMF050X
Asia-Pacifi c: Tel: +886-2 2562-4117 • Fax: +886-2 2562-4116
Europe: Tel: +41-41 768 5555 • Fax: +41-41 768 5510
The Americas: Tel: +1-951 781-5500 • Fax: +1-951 781-5700
www.bourns.com
N(HUB DIA.)
(MEASURED
AT HUB)
A
T
B
D
W2
(MEASURED
AT HUB)
W
1
P00 1
0
0
0
10 P
P2P1A
E
FW
MF-FSMF Series Tape and Reel Specifi cations
Product Dimensions
MF-FSMF010X MF-FSMF020X, MF-FSMF035X MF-FSMF050X
Tape Dimensions per EIA 481-1 per EIA 481-1 per EIA 481-1
W 8.0 ± 0.1 8.0 ± 0.1 8.0 ± 0.1
(0.315 ± 0.004) (0.315 ± 0.004) (0.315 ± 0.004)
P0 4.0 ± 0.1 4.0 ± 0.1 4.0 ± 0.1
(0.157 ± 0.004) (0.157 ± 0.004) (0.157 ± 0.004)
P1 4.0 ± 0.05 4.0 ± 0.05 4.0 ± 0.05
(0.157 ± 0.002) (0.157 ± 0.002) (0.157 ± 0.002)
P2 2.0 ± 0.05 2.0 ± 0.05 2.0 ± 0.05
(0.079 ± 0.002) (0.079 ± 0.002) (0.079 ± 0.002)
A0 1.17 ± 0.05 1.17 ± 0.05 1.17 ± 0.05
(0.046 ± 0.002) (0.046 ± 0.002) (0.046 ± 0.002)
B0 2.02 ± 0.05 2.02 ± 0.05 2.02 ± 0.05
(0.079 ± 0.002) (0.079 ± 0.002) (0.079 ± 0.002)
D0 1.55 ± 0.05 1.55 ± 0.05 1.55 ± 0.05
(0.061 ± 0.002) (0.061 ± 0.002) (0.061 ± 0.002)
F 3.5 ± 0.05 3.5 ± 0.05 3.5 ± 0.05
(0.138 + 0.002) (0.138 + 0.002) (0.138 + 0.002)
E1 1.75 ± 0.1 1.75 ± 0.1 1.75 ± 0.1
(0.069 ± 0.004) (0.069 ± 0.004) (0.069 ± 0.004)
T 0.75 ± 0.05 0.60 ± 0.05 0.95 ± 0.05
(0.030 ± 0.002) (0.024 ± 0.002) (0.037 ± 0.002)
10 P0 40.0 ± 0.1 40.0 ± 0.1 40.0 ± 0.1
(1.575 ± 0.004) (1.575 ± 0.004) (1.575 ± 0.004)
Reel Dimensions
A max. 185 185 185
(7.283) (7.283) (7.283)
N min. 50 50 50
(1.97) (1.97) (1.97)
W1 8.4 + 1.5/ -0.0 8.4 + 1.5/ -0.0 8.4 + 1.5/ -0.0
(0.331 + 0.059/-0) (0.331 + 0.059/-0) (0.331 + 0.059/-0)
W2 max. 14.4 14.4 14.4
(0.567) (0.567) (0.567)
DIMENSIONS: MM
(INCHES)
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
