Specifications are subject to change without notice.
Specifications are subject to change without notice.
Electrical Characteristics
Max. Time
Tripped
Ihold
Itrip
To Trip
Power
Resistance
Dissipation
Model
Amperes
Ohms
Amperes
Seconds
Watts
V max.
I max.
at 23 C
at 23 C
at 23 C
at 23 C
at 23 C
Volts
Amps
Hold
Trip RMin.
R1Max.
Typ.
MF-USMD005
30.0
10
0.05
0.15
2.80
50.0
0.25
1.5
0.8
MF-USMD010
30.0
10
0.10
0.30
0.80
15.0
0.5
0.6
0.8
MF-USMD020
30.0
10
0.20
0.40
0.40
5.00
8.0
0.02
0.8
MF-USMD035
6.0
40
0.35
0.75
0.20
1.30
8.0
0.2
1.0
MF-USMD050
13.2
40
0.50
1.00
0.18
0.90
8.0
0.1
1.0
MF-USMD075
6.0
40
0.75
1.50
0.07
0.450
8.0
0.1
1.2
MF-USMD110
6.0
40
1.10
2.20
0.05
0.210
5.0
1.0
1.2
Operating/Storage 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....................10 % 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
Environmental Characteristics
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 specified 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
UL File Number ..................................E174545
http://www.ul.com/ Follow link to Certifications, then UL File No., enter E174545
CSA File Number ................................CA110338
http://directories.csa-international.org/ Under "Certification Record" and "File Number" enter 110338-0-000
TV Certificate Number ......................R 02057213
http://www.tuvdotcom.com/ Follow link to "other certificates", enter File No. 2057213
Test Procedures And Requirements For Model MF-USMD Series
Thermal Derating Chart - Ihold (Amps)
Ambient Operating Temperature
Model
-40 C
-20 C
0 C
23 C
40 C
50 C
60 C
70 C
85C
MF-USMD005 0.08
0.07
0.06
0.05
0.04
0.04
0.03
0.03
0.02
MF-USMD010 0.16
0.14
0.12
0.10
0.08
0.07
0.06
0.05
0.04
MF-USMD020 0.32
0.28
0.24
0.20
0.16
0.14
0.12
0.10
0.06
MF-USMD035 0.47
0.45
0.40
0.35
0.33
0.28
0.24
0.21
0.18
MF-USMD050 0.76
0.67
0.58
0.50
0.43
0.40
0.36
0.32
0.28
MF-USMD075 1.00
0.97
0.86
0.75
0.64
0.59
0.54
0.48
0.40
MF-USMD110 1.60
1.42
1.26
1.10
0.94
0.86
0.80
0.70
0.58
MF-USMD Series -
PTC Resettable Fuses
Features
Very small size 1210 footprint - 44 %
smaller design than MF-MSMD Series
Fast tripping resettable circuit protection
Surface mount packaging for automated
assembly
Agency recognition:
Applications
PC motherboards
PC modems
USB
Analog and digital line cards
IEEE 1394
General electronics: Phones, fax machines,
televisions, printers, video equipment
TV Rheinland
Product Safety
Specifications are subject to change without notice.
Specifications are subject to change without notice.
A
B
C
Terminal material: solder-plated copper
Termination pad solderability: Meets EIA Specification RS-186-9E, ANSI/J-STD-002 Category 3.
Top and Bottom View
Side View
D
Product Dimensions
Packaging: 3000 pcs. per reel.
MF-USMD Series -
PTC Resettable Fuses
A
B
C
D
Model
Min.
Max.
Min.
Max.
Min.
Max.
Min.
MF-USMD005
3.00
3.43
2.35
2.80
0.50
0.85
0.30
(0.118)
(0.135)
(0.093)
(0.110)
(0.020)
(0.033)
(0.012)
MF-USMD010
3.00
3.43
2.35
2.80
0.50
0.85
0.30
(0.118)
(0.135)
(0.093)
(0.110)
(0.020)
(0.033)
(0.012)
MF-USMD020
3.00
3.43
2.35
2.80
0.50
0.85
0.30
(0.118)
(0.135)
(0.093)
(0.110)
(0.020)
(0.033)
(0.012)
MF-USMD035
3.00
3.43
2.35
2.80
0.38
0.62
0.30
(0.118)
(0.135)
(0.093)
(0.110)
(0.015)
(0.025)
(0.012)
MF-USMD050
3.00
3.43
2.35
2.80
0.38
0.62
0.30
(0.118)
(0.135)
(0.093)
(0.110)
(0.015)
(0.024)
(0.012)
MF-USMD075
3.00
3.43
2.35
2.80
0.38
0.62
0.30
(0.118)
(0.135)
(0.093)
(0.110)
(0.015)
(0.025)
(0.012)
MF-USMD110
3.00
3.43
2.35
2.80
0.30
0.48
0.30
(0.118)
(0.135)
(0.093)
(0.110)
(0.012)
(0.019)
(0.012)
Typical Part Marking
Represents total content. Layout may vary.
051
Z
MANUFACTURER'S
TRADEMARK
YEAR CODE -
2001 = 1
PART IDENTIFICATION
BIWEEKLY DATE CODE -
WEEK 51 & 52 = Z
160220
300
250
200
150
100
50
0
1020
Temperature (
C)
120
Preheating
Soldering
Cooling
Time (seconds)
Solder Reflow Recommendations
Additional Features
Patents pending
Note:
MF-USMD models can be wave soldered and reworked.
If reflow temperatures exceed the recommended profile, devices may not meet the performance
requirements.
Recommended Pad Layout
2.6 0.1
(.102 .004)
1.70 0.1
(.067 .004)
1.1 0.1
(.043 .004)
1.1 0.1
(.043 .004)
MM
(INCHES)
UNIT =
Specifications are subject to change without notice.
Specifications are subject to change without notice.
How to Order
MF - USMD 005 - 2
Multifuse
Product
Designator
Series
USMD = 1210 Surface Mount Component
Hold Current, Ihold
005-110 (0.05 Amps - 1.10 Amps)
Packaging
Packaged per EIA 481-1
-2 = Tape and Reel
Typical Time to Trip at 23 C
100
10
1
0.1
0.01
0.001
1
0.1
10
Fault Current (Amps)
T
ime to trip (Seconds)
MF-USMD010
MF-USMD020 MF-USMD035
MF-USMD050
MF-USMD075 MF-USMD110
MF-USMD005
MF-USMD Series -
PTC Resettable Fuses
MF-USMD SERIES, REV. M, 04/03
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