Surface Mount Resettable PTCs
Revision 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.
SMD1210 Series
UN Semiconductor Co., Ltd. www.unsemi.com.tw
The SMD1210 Series PTC provides surface mount
over-current protection for applications where space is at a
premium and resettable protection is desired.
u RoHS compliant, Lead-Free and Halogen-Free
u Fast time-to-trip
u Compact design saves board space
u Low resistance
u Low-profile
u PC motherboard - plug and play protection
u Mobile phones - battery and port protection
u Game console port protection
u USB peripherals
u Disk drive
u PDAS / digital cameras
u Power ports
u General electronics
Hold
Current
Trip
Current
Rated
Voltage
Max
Current
Typical
Power
Maximum Time
To Trip
Resistance
Part Number
I
hold
(A) I
trip
(A)
V
max
(Vdc)
I
max
(A)
P
dtyp.
(W)
Current
(A)
Time
(Sec.)
R
min
(Ω)
R
1max
(Ω)
SMD1210-005 0.05 0.15 30 100 0.60 0.25 1.50 2.800 50.000
SMD1210-010 0.10 0.30 30 100 0.60 0.50 0.60 0.800 15.000
SMD1210-020 0.20 0.40 30 100 0.60 8.00 0.02 0.400 5.000
SMD1210-035 0.35 0.75 6 100 0.60 8.00 0.20 0.200 1.3000
SMD1210-050 0.50 1.00 13.2 100 0.60 8.00 0.10 0.180 0.900
SMD1210-075 0.75 1.50 6 100 0.60 8.00 0.10 0.070 0.400
SMD1210-110 1.10 2.20 6 100 0.60 8.00 0.30 0.050 0.210
SMD1210-150 1.50 3.00 6 100 0.60 8.00 0.50 0.030 0.110
SMD1210-175 1.75 3.50 6 100 0.80 8.00 0.60 0.020 0.080
SMD1210-200 2.00 4.00 6 100 0.80 8.00 1.00 0.015 0.070
I
hold
= Hold current: maximum current device will pass without tripping in 23°C still air.
I
trip
= Trip current: minimum current at which the device will trip in 23°C still air.
V
max
= Maximum voltage device can withstand without damage at rated c
urrent (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 23°C still air.
R
min
= Minimum resistance of device in initial (un-soldered) state.
R
1max
= Maximum resistance of device at 23°C measured one hour after tripping.
Caution: Operation beyond the specified rating may result in damage and possible arcing and flame.
Electrical Parameters
Appl
icable
Description
Features
Surface Mount Resettable PTCs
Revision 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.
SMD1210 Series
UN Semiconductor Co., Ltd. www.unsemi.com.tw
Profile Feature
Pb-Free Assembly
Average Ramp-Up Rate (T
S
max to T
P
)
3°C/second max.
Preheat :
Temperature Min (T
S
min)
Temperature Max (T
S
max)
Time (
T
S
min to
T
S
max)
150°C
200°C
60
-
180 seconds
Time maintained above:
Temperature(TL)
Time (tL)
217°C
60-150 seconds
Peak/Classification Temperature(T
P
):
260°C
Time within 5°C of actual peak:
Temperature 20-40 seconds
Ramp-down Rate:
6°C/ second max.
Time 25°C to Peak Temperature
8 minutes max.
Note: All temperatures refer to of the package, measured on the package body surface.
Solder reflow
Due to “Lead Free” nature, Temperature and Dwelling time for the
soldering zone is higher than those for Regular. This may cause
damage to other components.
1. Recommended max past thickness > 0.25mm.
2. Devices can be cleaned using standard methods and aqueous
solvent.
3. Rework use standard industry practices.
4. Storage Environment : < 30/ 60%RH℃
Caution:
1. If reflow temperatures exceed the recommended profile, devices
may not meet the performance requirements.
2. Devices are not designed to be wave soldered to the bottom side
of the board.
Terminal pad material Pure Tin
Soldering Characteristics Meets EIA specification RS 186-9E, ANSI/J-std-002 Category 3
Temperature Rerating
Chart
–
I
hold
(A)
Soldering Parameters
Temperature Rerating Curve
Average Time Current Curves
Material
Specifications
Ramp-down
Preheat
Critical Zone
T
L
to T
P
Time to peak temperature
(t 25℃ to peak)
T
P
T
L
T
S(max)
T
S(min)
25
Temperature
Ramp-up
Time
Average Time Current Curves
0.01
0.1
1
10
100
0.1 1 10
Current In Amperes
Time In Second
0.05A
0.10A
0.20A
0.30A
0.50A
0.75
1.10A
1.50A
Derating Curves for SMD1210
0
20
40
60
80
100
120
140
160
-40 -20 0 20 4 0 60 80
Temperature (°C)
Percentage of Derated
Current