Features
■
■
■
Applications
■
■
■
■
■
■
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:
®
®
TÜV Rheinland
Product Safety
■
PC motherboards
PC modems
USB
Analog and digital line cards
IEEE 1394
General electronics: Phones, fax machines,
televisions, printers, video equipment
MF-USMD Series -
PTC Resettable Fuses
Electrical Characteristics
Tripped
Power
Dissipation
Ihold
Model
V max.
Volts
I max.
Amps
Itrip
Resistance
Ohms
at 23 °C
RMin.
R1Max.
Max. Time
To Trip
Amperes
at 23 °C
Seconds
at 23 °C
Amperes
at 23 °C
Hold
Trip
Watts
at 23 °C
Typ.
MF-USMD005
MF-USMD010
MF-USMD020
MF-USMD035
MF-USMD050
MF-USMD075
MF-USMD110
30.0
30.0
30.0
6.0
13.2
6.0
6.0
10
10
10
40
40
40
40
0.05
0.10
0.20
0.35
0.50
0.75
1.10
0.15
0.30
0.40
0.75
1.00
1.50
2.20
2.80
0.80
0.40
0.20
0.18
0.07
0.05
50.0
15.0
5.00
1.30
0.90
0.450
0.210
0.25
0.5
8.0
8.0
8.0
8.0
5.0
1.5
0.6
0.02
0.2
0.1
0.1
1.0
0.8
0.8
0.8
1.0
1.0
1.2
1.2
Environmental Characteristics
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
Test Procedures And Requirements For Model MF-USMD 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 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
TÜV Certificate Number ......................R 02057213
http://www.tuvdotcom.com/ Follow link to “other certificates”, enter File No. 2057213
Thermal Derating Chart - Ihold (Amps)
Ambient Operating Temperature
Model
MF-USMD005
MF-USMD010
MF-USMD020
MF-USMD035
MF-USMD050
MF-USMD075
MF-USMD110
-40 ˚C
0.08
0.16
0.32
0.47
0.76
1.00
1.60
-20 ˚C
0.07
0.14
0.28
0.45
0.67
0.97
1.42
0 ˚C
0.06
0.12
0.24
0.40
0.58
0.86
1.26
23 ˚C
0.05
0.10
0.20
0.35
0.50
0.75
1.10
40 ˚C
0.04
0.08
0.16
0.33
0.43
0.64
0.94
50 ˚C
0.04
0.07
0.14
0.28
0.40
0.59
0.86
60 ˚C
0.03
0.06
0.12
0.24
0.36
0.54
0.80
70 ˚C
0.03
0.05
0.10
0.21
0.32
0.48
0.70
85˚C
0.02
0.04
0.06
0.18
0.28
0.40
0.58
Specifications are subject to change without notice.
Additional Features
■
Patents pending
MF-USMD Series -
PTC Resettable Fuses
Product Dimensions
Model
MF-USMD005
MF-USMD010
MF-USMD020
MF-USMD035
MF-USMD050
MF-USMD075
MF-USMD110
Packaging: 3000 pcs. per reel.
A
Min.
3.00
(0.118)
3.00
(0.118)
3.00
(0.118)
3.00
(0.118)
3.00
(0.118)
3.00
(0.118)
3.00
(0.118)
Max.
3.43
(0.135)
3.43
(0.135)
3.43
(0.135)
3.43
(0.135)
3.43
(0.135)
3.43
(0.135)
3.43
(0.135)
Min.
2.35
(0.093)
2.35
(0.093)
2.35
(0.093)
2.35
(0.093)
2.35
(0.093)
2.35
(0.093)
2.35
(0.093)
B
Max.
2.80
(0.110)
2.80
(0.110)
2.80
(0.110)
2.80
(0.110)
2.80
(0.110)
2.80
(0.110)
2.80
(0.110)
Min.
0.50
(0.020)
0.50
(0.020)
0.50
(0.020)
0.38
(0.015)
0.38
(0.015)
0.38
(0.015)
0.30
(0.012)
C
Max.
0.85
(0.033)
0.85
(0.033)
0.85
(0.033)
0.62
(0.025)
0.62
(0.024)
0.62
(0.025)
0.48
(0.019)
D
Min.
0.30
(0.012)
0.30
(0.012)
0.30
(0.012)
0.30
(0.012)
0.30
(0.012)
0.30
(0.012)
0.30
(0.012)
UNIT =
MM
(INCHES)
Typical Part Marking
Top and Bottom View
A
Side View
C
Recommended Pad Layout
1.1
±
0.1
(.043
±
.004)
1.1
±
0.1
(.043
±
.004)
2.6
±
0.1
(.102
±
.004)
1.70
±
0.1
(.067
±
.004)
Represents total content. Layout may vary.
PART IDENTIFICATION
YEAR CODE -
2001 = 1
B
MANUFACTURER'S
TRADEMARK
051
Z
BIWEEKLY DATE CODE -
WEEK 51 & 52 = Z
D
Terminal material: solder-plated copper
Termination pad solderability: Meets EIA Specification RS-186-9E, ANSI/J-STD-002 Category 3.
Solder Reflow Recommendations
300
250
200
150
100
50
0
160–220
10–20
120
Preheating
Soldering
Cooling
Time (seconds)
Note:
• MF-USMD models can be wave soldered and reworked.
•
If reflow temperatures exceed the recommended profile, devices may not meet the performance
requirements.
Temperature (°C)
Specifications are subject to change without notice.
MF-USMD Series -
PTC Resettable Fuses
Typical Time to Trip at 23 ˚C
MF
-US
MD
010
MF
-US
MD
020
MF
-US
MD
035
MF
-US
MD
050
MF
-US
MD
075
MF
-US
MD
110
MD
005
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)
100
MF
-US
Packaging
Packaged per EIA 481-1
-2 = Tape and Reel
10
Time to trip (Seconds)
1
0.1
0.01
0.001
0.1
1
10
Fault Current (Amps)
MF-USMD SERIES, REV. M, 04/03
Specifications are subject to change without notice.
MF-MSMD, MF-USMD & MF-ESMD Series Tape and Reel Specs
MF-MSMD Series
per EIA-481-1
12.0 ± 0.30
(0.472 ± 0.012)
4.0 ± 0.10
(0.157 ± 0.004)
8.0 ± 0.10
(0.315 ± 0.004)
2.0 ± 0.05
(0.079 ± 0.002)
3.66 ± 0.15
(0.144 ± 0.006)
4.98 ± 0.10
(0.196 ± 0.004)
5.9
(0.232)
1.5 + 0.10/-0.00
(0.059 + 0.004/-0)
5.5 ± 0.05
(0.217 ± 0.002)
1.75 ± 0.10
(0.069 ± 0.004)
10.25
(0.404)
0.6
(0.024)
0.1
(0.004)
0.95 ± 0.10
(0.037 ± 0.004)
390
(15.35)
160
(6.30)
Tape Dimensions
W
P0
P1
P2
A0
B0
B1 max.
D0
F
E1
E2 min.
T max.
T1 max.
K0
Leader min.
Trailer min.
Reel Dimensions
A max.
N min.
W1
W2 max.
MF-USMD Series
per EIA 481-1
8.0 ± 0.30
(0.315 ± 0.012)
4.0 ± 0.10
(0.157 ± 0.004)
4.0 ± 0.10
(0.157 ± 0.004)
2.0 ± 0.05
(0.079 ± 0.002)
MF-USMD005,010,020:
MF-USMD035,050,075,110:
2.76 ± 0.10
2.93 ± 0.15
(0.109 ± 0.004)
(0.115 ± 0.006)
MF-USMD005,010,020:
3.5 ± 0.1
(0.138 ± 0.004)
MF-USMD035,050,075,110:
3.56 ± 0.1
(0.140 ± 0.004)
MF-ESMD Series
per EIA 481-2
24.0 ± 0.3
(0.945 ± 0.012)
4.0 ± 0.1
(0.157 ± 0.004)
8.0 ± 0.1
(0.315 ± 0.004)
2.0 ± 0.1
(0.079 ± 0.004)
5.65 ± 0.1
(0.222 ± 0.004)
11.86 ± 0.1
(0.467 ± 0.004)
20.1
(0.791)
1.5 + 0.1/-0.0
(0.059 + 0.004/-0)
11.5 ± 0.10
(0.453 ± 0.004)
1.75 ± 0.10
(0.069 ± 0.004)
22.25
(0.876)
0.6
(0.024)
0.1
(0.004)
0.85 ± 0.1
(0.033 ± 0.004)
390
(15.35)
160
(6.30)
4.35
(0.171)
1.50 + 0.1/-0.0
(0.059 + 0.004/-0)
3.5 ± 0.05
(0.138 ± 0.002)
1.75 ± 0.10
(0.069 ± 0.004)
6.25
(0.246)
0.6
(0.024)
0.1
(0.004)
MF-USMD005,010,020:
MF-USMD035,050,075,110:
0.75 ± 0.10
1.07 ± 0.10
(0.030 ± 0.004)
(0.042 ± 0.004)
390
(15.35)
160
(6.30)
185
(7.28)
50
(1.97)
12.4 + 2.0/-0.0
(0.488 + 0.079/-0.0)
18.4
(0.724)
185
(7.28)
50
(1.97)
8.4 + 1.5/-0.0
(0.331 + 0.059/-0)
14.4
(0.567)
360
(14.17)
60
(2.36)
24.4 + 2.0/ -0.0
(0.961 + 0.079/-0)
30.4
(1.20)
MM
(INCHES)
P0
T
D0
P2
E1
UNIT =
W2(MEASURED
AT HUB)
COVER
TAPE
F
B1
B0
K0
T1
P1
A0
W1(MEASURED
AT HUB)
E2 W
A
N(HUB DIA.)
Specifications are subject to change without notice.
