Features
■ Compliant with AEC-Q200 Rev-C Stress
Test Qualifi cation for Passive Components
in Automotive Applications
■ Operating temperature range up to 125 °C
■ Low thermal derating factor
■ Higher hold currents at elevated
temperature
■ Choice of operating currents
■ RoHS compliant*
MF-SMHT Series - PTC Resettable Fuses
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
Environmental Characteristics
Operating Temperature ......................................... -40 °C to +125 °C
Storage Temperature ............................................ -40 °C to +85 °C
Passive Aging ....................................................... +125 °C, 1000 hours ............................................. ±15 % typical resistance change
Humidity Aging...................................................... +85 °C, 85 % R.H. 7 days ..................................... ±15 % typical resistance change
Thermal Shock ..................................................... MIL-STD-202F, Method 107G, .............................. ±15 % typical resistance change
+125 °C to -55 °C,10 cycles
Vibration ............................................................... MIL-STD-883C, Method 2007.1, Condition A ....... No change
Electrical Characteristics
Model V max.
Volts
I max.
Amps
Ihold Itrip Resistance Max. Time
To Trip
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-SMHT136 16 100 1.36 2.72 0.085 0.33 8.0 10.0 2.1
MF-SMHT160 16 100 1.60 3.20 0.050 0.15 8.0 10.0 2.1
Test Procedures And Requirements For Model MF-SMHT 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 .......................................................... MIL-STD-202F, Method 208F ............................... 95 % min. coverage
Thermal Derating Chart - Ihold/Itrip (Amps)
Model Ambient Operating Temperature
-40 °C -20 °C 0 °C 23 °C 40 °C 50 °C 60 °C 70 °C 85 °C 125 °C
MF-SMHT136 1.91 / 3.82 1.72 / 3.44 1.54 / 3.08 1.36 / 2.72 1.18 / 2.36 1.09 / 2.18 1.00 / 2.00 0.91 / 1.82 0.77 / 1.54 0.40 / 0.80
MF-SMHT160 2.15 / 4.30 1.96 / 3.92 1.78 / 3.56 1.60 / 3.20 1.42 / 2.48 1.33 / 2.66 1.24 / 2.48 1.15 / 3.30 1.02 / 2.04 0.64 / 1.28
4A
136
4A
136
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
*RoHS COMPLIANT
& AEC APPROVED
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
MF-SMHT Series - PTC Resettable Fuses
Product Dimensions
DIMENSIONS: MM
(INCHES)
Model ABCD E F GH
Min. Max. Max. Max. Min. Max. Min. Max Min. Max. Min. Max. Min.
MF-SMHT136 6.73
(0.265)
7.98
(0.314)
3.00
(0.118)
5.44
(0.214)
0.56
(0.022)
0.71
(0.028)
0.56
(0.022)
0.71
(0.028)
2.16
(0.085)
2.41
(0.095)
0.66
(0.026)
1.37
(0.054)
0.43
(0.017)
MF-SMHT160 8.00
(0.315)
9.50
(0.374)
3.00
(0.118)
6.71
(0.264)
0.56
(0.022)
0.71
(0.028)
0.56
(0.022)
0.71
(0.028)
3.68
(0.145)
3.94
(0.155)
0.66
(0.026)
1.37
(0.054)
0.43
(0.017)
Packaging:
TAPE & REEL: MF-SMHT136 = 2000 pcs. per reel; MF-SMHT160 = 1500 pcs. per reel.
A
D
H
E
Side View
B
F
C
End View
G
Terminal material:
Tin-plated brass
2.3 ± 0.1
(0.09 ± 0.004)
9.7 ± 0.1
(0.38 ± 0.004)
3.1 ± 0.1
(0.12 ± 0.004)
3.1 ± 0.1
(0.12 ± 0.004)
Recommended Pad Layout
MF-SMHT136
10.7 ± 0.1
(0.42 ± 0.004)
4.6 ± 0.1
(0.18 ± 0.004)
2.3 ± 0.1
(0.09 ± 0.004)
4.6 ± 0.1
(0.18 ± 0.004)
Recommended Pad Layout
MF-SMHT160
How to Order
MF - SMHT 136 - 2
Multifuse® Product
Designator
Series
SMHT = Surface Mount Component
Hold Current, Ihold
136 - 160 (1.36 - 1.60 Amps)
Packaging Options
- 2 = Tape and Reel*
*Packaged per EIA-481-2
Typical Part Marking
Represents total content. Layout may vary.
MANUFACTURER'S
TRADEMARK
PART
IDENTIFICATION
136
4A DATE CODE -
WEEK 1 OF 2004 = 4A
(YEAR & WEEK)
WEEK 27 OF 2004 = A4
(WEEK & YEAR)
Applications
■ Protection of automotive circuitry including engine control modules
■ Overcurrent surge protection of electronic equipment required to operate at high
operating temperature ranges
■ Resettable fault protection of general electronic equipment
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
MF-SMHT Series - PTC Resettable Fuses
MF-SMHT SERIES, REV. F, 02/12
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.
Solder Refl ow Recommendations
Solder refl ow
• Recommended refl ow methods: IR, vapor phase oven, hot air oven.
• Devices are not designed to be wave soldered to the bottom side of
the board.
• Gluing the devices is not recommended.
• Recommended maximum paste thickness is 0.25 mm (.010 inch).
• Devices can be cleaned using standard industry methods and
solvents.
Note:
• If refl ow temperatures exceed the recommended profi le, devices
may not meet the performance requirements.
Rework
• A device should not be reworked.
0.01
0.1
0.001
110 100
1
10
Fault Current (Amps)
Time to Trip (Seconds)
MF-SMHT136
MF-SMHT160
160–220
300
250
200
150
100
50
0
10–20
Temperature (°C)
120
Preheating Soldering Cooling
Time (seconds)
MF-SMHT136 MF-SMHT160
Tape Dimensions per EIA-481-2 per EIA 481-2
W 16.0 ± 0.3 16.0 ± 0.3
(0.630 ± 0.012) (0.630 ± 0.012)
P0 4.0 ± 0.1 4.0 ± 0.1
(0.157 ± 0.004) (0.157 ± 0.004)
P1 8.0 ± 0.1 12.0 ± 0.1
(0.315 ± 0.004) (0.472 ± 0.004)
P2 2.0 ± 0.1 2.0 ± 0.1
(0.079 ± 0.004) (0.079 ± 0.004)
A0 5.7 ± 0.1 6.9 ± 0.1
(0.224 ± 0.004) (0.272 ± 0.004)
B0 8.1 ± 0.1 9.6 ± 0.1
(0.319 ± 0.004) (0.378 ± 0.004)
B1 max. 12.1 12.1
(0.476) (0.476)
D0 1.5 + 0.1/-0.0 1.5 + 0.1/-0.0
(0.059 + 0.004/-0) (0.059 + 0.004/-0)
F 7.5 ± 0.1 7.5 ± 0.1
(0.295 + 0.004) (0.295 + 0.004)
E1 1.75 ± 0.1 1.75 ± 0.1
(0.069 ± 0.004) (0.069 ± 0.004)
E2 min. 14.25 14.25
(0.561) (0.561)
T max. 0.6 0.6
(0.024) (0.024)
T1 max. 0.1 0.1
(0.004) (0.004)
K0 3.4 ± 0.1 3.4 ± 0.1
(0.134 ± 0.004) (0.134 ± 0.004)
Leader min. 390 390
(15.35) (15.35)
Trailer min. 160 160
(6.30) (6.30)
Reel Dimensions
A max. 360 360
(14.17) (14.17)
N min. 50 50
(1.97) (1.97)
W1 16.4 + 2.0/ -0.0 16.4 + 2.0/ -0.0
(0.646 + 0.079/-0) (0.646 + 0.079/-0)
W2 max. 22.4 22.4
(0.882) (0.882)
MF-SMHT Series Tape and Reel Specifi cations
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
DIMENSIONS: MM
(INCHES)
B1
N(HUB DIA.)
(MEASURED
AT HUB)
A
T
COVER
TAPE
K0
T1A0
W2
(MEASURED
AT HUB)
W
1
P1
B0
F
D0P2
P
0
E2
E1
W
NOTE: Effective December 1, 2010 (product date code V0), the cover tape will be changed to the new 3M™ Universal Cover Tape (UCT).
