SLT-Axial Leaded Strap Lead(Pb) Free PTC Devices
SLT-Axial Leaded Strap Lead(Pb) Free PTC Devices
Description
The new SLT Axial Leaded Strap Lead(Pb) Free PTC device are designed
based on a proprietary conductive polymer material, to provide both
overcurrent and overtemperature protection for rechargeable battery cells.
The SLT Axial Leaded Strap Lead(Pb) Free devices featuring a slim, low profile
and low resistance design and are ideal to install directly on the latest
generations of battery cells for longer battery run time.
SLT products provide reliable, noncycling protection against overcharging and
short circuits events and increase the battery safety level.
Agency Approval and Environmental Compliance
File Number
Agency
E201431
R50103314
Regulation
Standard
2002/95/EC
IEC 61249-2-21:2003
Electrical Characteristics
I
hold
(A)
1.40
1.80
1.90
2.50
2.70
3.10
3.50
3.70
3.70
4.20
5.00
3.50
Part Number
SLT140GF
SLT180GWF
SLT190GF
SLT250GUF
SLT270GF
SLT310GF
SLT350GWF
SLT370GF
SLT370RF
SLT420GF
SLT500GF
SLT350GUF-AL
I
trip
(A)
3.60
5.20
4.90
6.20
6.20
7.00
7.80
8.00
8.00
9.00
10.00
7.60
V
max
(Vdc)
6
6
6
6
6
6
6
6
6
6
6
6
I
max
(A)
50
50
50
50
50
50
50
50
50
50
50
50
P
d typ
(W)
1.0
1.0
1.0
1.0
1.0
1.0
1.2
1.2
1.2
1.2
1.2
1.2
Maximum
Time To Trip
Current Time
(A)
(Sec.)
7.0
9.0
9.5
12.5
13.5
15.5
17.5
18.5
18.5
21.0
25.0
18.5
3.0
5.0
3.0
2.0
2.0
3.0
5.0
5.0
5.0
5.0
5.0
5
Resistance
R
min
(Ω)
0.010
0.007
0.007
0.006
0.006
0.006
0.007
0.005
0.005
0.004
0.003
0.005
Agency
Approval
R
max
(Ω)
0.020
0.015
0.015
0.016
0.013
0.012
0.014
0.010
0.012
0.009
0.009
0.015
R
1max
(Ω)
0.035
0.026
0.024
0.028
0.024
0.022
0.018
0.018
0.020
0.016
0.015
0.026
新竹市科學工業園區工業東四路
24-1
號
No. 24-1 Industry E. Rd. IV, Hsinchu Science Park, Hsinchu 300, Taiwan.
TEL: +886-3-5643931 FAX: +886-3-5644624
http://www.pttc.com.tw
Page: 2 of 7
2017/06/01 Revision: B
SLT-Axial Leaded Strap Lead(Pb) Free PTC Devices
How to Select a Polymer PTC fuse
(1) Determine the following operating parameters for the circuits:
(A) Normal Operating Current (I hold)
(B) Maximum Circuit Voltage (V max)
I Maximum Interrupt Current (I max)
(D) Normal Operating Temperature (min ºC /max ºC)
(2) Select the device form factor and dimension suitable for the application:
Axial Leaded Strap Device (SLT, SLD, SLH, VTD, LTD, LRD, STD, LTD Series)
Surface Mount Device (SMD Series)
Radial Leaded Device (RLD Series)
Other Custom-designed Device (Disc/Chip)
(3) Compare the maximum ratings for V max and I max of the PTC device with the circuit in
application and make sure that the circuit’s requirement does not exceed the device ratings.
(4) Check that the PTC device’s trip time (time-to-trip) will protect the circuit.
(5) Verify that the circuit operating temperatures are within the PTC device’s normal operating temperature range.
(6) Verify the performance and suitability of the chosen PTC device in the application.
新竹市科學工業園區工業東四路
24-1
號
No. 24-1 Industry E. Rd. IV, Hsinchu Science Park, Hsinchu 300, Taiwan.
TEL: +886-3-5643931 FAX: +886-3-5644624
http://www.pttc.com.tw
Page: 3 of 7
2017/06/01 Revision: B
SLT-Axial Leaded Strap Lead(Pb) Free PTC Devices
THERMAL DERATING CURVE FOR SLT SERIES
200.00
Pe r c e n t a g e o f r a t e d c u r r e n t ( %)
160.00
120.00
80.00
40.00
-40.00
0.00
40.00
80.00
Device ambient temperature(degC)
THERMAL DERATING CHART FOR SLD SERIES – Ihold (Amps)
Model
SLT140GF
SLT180GWF
SLT190GF
SLT250GWF
SLT270GF
SLT310GF
SLT350GWF
SLT370GF
SLT370RF
SLT420GF
SLT500GF
SLT350GUF-AL
Ambient Operation Temperature
-40 ºC
2.70
3.60
3.80
4.80
5.40
5.70
6.00
6.40
6.40
7.40
9.00
6.30
-20 ºC
2.30
3.00
3.20
4.20
4.60
4.70
5.15
5.60
5.60
6.40
7.80
5.50
0 ºC
1.90
2.45
2.60
3.50
3.80
4.00
4.25
4.60
4.60
5.30
6.50
4.60
25 ºC
1.40
1.80
1.90
2.50
2.70
3.10
3.50
3.70
3.70
4.20
5.00
3.50
40 ºC
1.10
1.35
1.50
2.00
2.15
2.50
2.80
2.95
2.95
3.40
4.00
2.90
50 ºC
0.90
1.05
1.20
1.65
1.80
2.10
2.30
2.40
2.40
2.90
3.40
2.40
60 ºC
0.70
0.80
0.90
1.30
1.40
1.80
1.90
2.00
2.00
2.40
2.80
2.00
70 ºC
0.50
0.55
0.60
0.95
1.00
1.40
1.50
1.60
1.60
1.80
2.10
1.60
新竹市科學工業園區工業東四路
24-1
號
No. 24-1 Industry E. Rd. IV, Hsinchu Science Park, Hsinchu 300, Taiwan.
TEL: +886-3-5643931 FAX: +886-3-5644624
http://www.pttc.com.tw
Page: 4 of 7
2017/06/01 Revision: B
SLT-Axial Leaded Strap Lead(Pb) Free PTC Devices
AVERAGE TIME-CURRENT CURVE FOR SLT SERIES
100.00
A= SLT190
B= SLT270
10.00
C= SLT310
D= SLT370
E= SLT420
Time to Trip (sec)
1.00
0.10
0.01
E
D
C
B
A
0.00
1.00
10.00
100.00
Fault Current (Amp.)
PART NUMBERING SYSTEM
SLT
□□□ □□-□□
Code
G: General Type
R: Rectangular lead
V: Vertical Lead
W: Coating
U: Unlabeled
F: Lead Free
Hold Current Rating
Axial Leaded Strap Device
新竹市科學工業園區工業東四路
24-1
號
No. 24-1 Industry E. Rd. IV, Hsinchu Science Park, Hsinchu 300, Taiwan.
TEL: +886-3-5643931 FAX: +886-3-5644624
http://www.pttc.com.tw
Page: 5 of 7
2017/06/01 Revision: B
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