Surface Mount Resettable PTCs
R
evision October 18, 2013
1 / 4
@ UN Semiconductor Co., Ltd. 2013
Specifications are subject to change without notice.
Please refer to www.unsemi.com.tw for current information.
The SMD0805 Series PTC provides surface mount
over-current protection for applications where space is at a
premium and reset table protection is desired.
RoHS compliant, Lead-Free and Halogen-Free
Fast time-to-trip
Compact design saves board space
Agency recognition: UL
Low-profile
Almost anywhere there is a low voltage power supply, up to
16V and a load to be protected, including:
Computer mother board, Modem. USB hub
PDAs & Charger, Analog & digital line card
Digital cameras, Disk drivers, CD-ROMs
USB peripherals
Power ports
General electronics
Part Number I
hold
(A) I
trip
(A)
V
max
(Vdc)
I
max
(A)
P
dtyp.
(W)
Maximum Time
To Trip
Resistance
Current
(A)
Time
(Sec.)
R
min
(Ω)
R
max
(Ω)
SMD0805-010 0.10 0.30 15 100 0.50 0.50 1.50 1.000 6.000
SMD0805-020 0.20 0.50 9 100 0.50 8.00 0.02 0.650 3.500
SMD0805-035 0.35 0.75 6 100 0.50 8.00 0.10 0.250 1.200
SMD0805-050 0.50 1.00 6 100 0.50 8.00 0.10 0.150 0.085
SMD0805-075 0.75 1.50 6 40 0.60 8.00 0.20 0.090 0.385
SMD0805-100 1.0 1.95 6 100 0.60 8.00 0.30 0.060 0.230
I
hold
= Hold current: maximum current device will pass without tripping in 25°C still air.
I
trip
= Trip current: minimum current at which the device will trip in 25°C still air.
V
max
= Maximum voltage device can withstand without damage at rated current (I
max
)
I
max
= Maximum fault current device can withstand without damage at rated voltage (V
max
)
P
dtyp.
= Power dissipated from device when in the tripped state at 25°C still air.
R
min
= Minimum resistance of device in initial (un-soldered) state.
R
max
= Maximum resistance of device in initial (un-soldered) state.
R
1max
= Maximum resistance of device at 25°C measured one hour after tripping.
Caution: Operation beyond the specified rating may result in damage and possible arcing and flame.
Surface Mount Resettable PTCs
R
evision October 18, 2013
2 / 4
@ UN Semiconductor Co., Ltd. 2013
Specifications are subject to change without notice.
Please refer to www.unsemi.com.tw for current information.
Part Number
Ambient Operation Temperature
-40°C
-20°C
0°C
25°C
40°C
50°C
60°C
70°C
85°C
Hold Current (A)
SMD0805-010
0.14
0.12
0.11
0.1
0.8
0.7
0.6
0.5
0.3
SMD0805-020
0.28
0.25
0.23
0.20
0.17
0.14
0.12
0.10
0.07
SMD0805-035
0.47
0.44
0.39
0.35
0.30
0.27
0.24
0.20
0.14
SMD0805-050
0.68
0.62
0.55
0.50
0.40
0.37
0.33
0.29
0.23
SMD0805-075
1.00
0.90
0.79
0.75
0.63
0.57
0.53
0.41
0.34
SMD0805-100
1.35
1.25
1.15
1.00
0.82
0.74
0.65
0.55
0.42
D= SMD0805-050
E= SMD0805-075
F= SMD0805-100
Part Marking
X
Part Identification
1
Example
1= SMD0805-010
2= SMD0805-020
3= SMD0805-035
5= SMD0805-050
7= SMD0805-075
0= SMD0805-100