MF-USMD005 Datasheet, PDF (1/4 Pages) Bourns Electronic Solutions – PTC Resettable Fuses

Electrical Characteristics
Model
MF-USMD005
MF-USMD010
MF-USMD020
MF-USMD035
MF-USMD050
MF-USMD075
MF-USMD110
V max.
Volts
30.0
30.0
30.0
6.0
13.2
6.0
6.0
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:
®
®
TÜV Rheinland
Product Safety
Applications
■ 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
I max.
Amps
10
10
10
40
40
40
40
Ihold
Itrip
Amperes
at 23 °C
Hold
Trip
0.05
0.15
0.10
0.30
0.20
0.40
0.35
0.75
0.50
1.00
0.75
1.50
1.10
2.20
Resistance
Ohms
at 23 °C
RMin.
R1Max.
2.80
50.0
0.80
15.0
0.40
5.00
0.20
1.30
0.18
0.90
0.07
0.450
0.05
0.210
Max. Time
To Trip
Amperes Seconds
at 23 °C at 23 °C
0.25
1.5
0.5
0.6
8.0
0.02
8.0
0.2
8.0
0.1
8.0
0.1
5.0
1.0
Tripped
Power
Dissipation
Watts
at 23 °C
Typ.
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)
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
Specifications are subject to change without notice.
0 ˚C
0.06
0.12
0.24
0.40
0.58
0.86
1.26
Ambient Operating Temperature
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