Automotive
PolySwitch Automotive
Resettable Devices
Raychem has provided PPTC
resettable devices in the automo-
tive industry for over fifteen years.
Until recently, the products sold by
Raychem to this industry were
either custom products (TD and
Chip series devices) or our stan-
dard commercial versions of
PPTC resettable devices. With
the advent of QS-9000 and our
continued involvement in the auto-
motive industry, we were asked to
develop automotive-specific ver-
sions of our PPTC resettable
devices. The result of that work is
the four device series (AHS,
ASMD, AHR and AGR) featured in
this section. These products are
qualified and sold under our
PS400 specification which is
derived from AEC-Q200, the stan-
dard for electronic components used in the automotive industry. The key difference of these products is the
rigorous additional testing these devices have successfully passed to meet the demanding environmental
conditions that can be found in automotive applications, and the addition of new specification values which
characterize the products’ performance after being subjected to these specified environmental and electrical
stress conditions.
4
Benefits:
• Many product choices give
engineers more design flexibility
• Compatible with high volume
electronics assembly
• Assists in meeting regulatory
requirements
• Higher voltage ratings allow use
in new applications
Features:
• Wide range of resettable
devices for the automotive
industry
• Current ratings from 0.3A to 14A
• Voltage ratings from 15V to 60V
• Meets automotive industry
standards
• Fast time-to-trip
• Low resistance
Applications:
•
•
•
•
•
Automotive motors
Junction boxes
Lamp protection
Power outlet protection
CD changer
Devices in this section are grouped by:
Form Factor, Product Series, Hold Current
Raychem Circuit Protection
PolySwitch Automotive Resettable Devices
237
Selection Guide for Automotive Devices
Step 1.
Determine the circuit’s operating parameters.
Fill in the following information about the circuit:
Maximum ambient operating temperature
Normal operating current
Maximum operating voltage
(i.e. AGR400 is 16V
MAX
.)
Maximum interrupt current
Step 2.
Select the PolySwitch device that will accommodate the
circuit’s maximum ambient temperature and normal
operating current.
Look across the top of Table A2 to find the temperature that most
closely matches the circuit’s maximum operating temperature. Look
down that column to find the value equal to or greater than the circuit’s
normal operating current. Now look to the far left of that row to find the
part number for the PolySwitch device that will best accommodate the
circuit. Devices in this section are grouped by form factor, therefore
your operating current requirement may be found in more than one
product grouping.
The thermal derating curves located in Figures A1 and A2 are the
normalized representations of the data in Table A2.
4
Step 3.
Compare the selected device’s maximum electrical rat-
ings with the circuit’s maximum operating voltage and
maximum interrupt current.
Look down the first column of Table A3 to find the part number you
selected in Step 2. Look to the right in that row to find the device’s
maximum operating voltage (V
MAX
) and maximum interrupt current
(I
MAX
) Ensure that V
MAX
and I
MAX
are greater than or equal to the cir-
cuit’s maximum operating voltage and maximum interrupt current.
238
PolySwitch Automotive Resettable Devices
Raychem Circuit Protection
Automotive
Step 4.
Determine time-to-trip.
Time-to-trip is the amount of time it takes for a device to switch to a
high-resistance state once a fault current has been applied across the
device. Identifying the PolySwitch device’s time-to-trip is important in
order to provide the desired protection capabilities. If the device you
choose trips too fast, undesired or nuisance tripping will occur. If the
device trips too slowly, the components being protected may be
damaged before the device switches to a high-resistance state.
Refer to the typical time-to-trip curves for each of the PolySwitch
devices found in Figures A8-A11.
If the PolySwitch device’s time-to-trip is too fast or too slow for the cir-
cuit, go back to Step 2 and choose an alternate device.
Step 5.
Verify ambient operating conditions.
Ensure that your application’s minimum and maximum ambient
temperatures are within the operating temperature of -40°C to 85°C
(-40°C to 125°C for AHR, AHS series devices).
4
Step 6.
Verify the PolySwitch device dimensions.
Using dimensions in Table A4, compare the dimensions of the
PolySwitch device you selected with the application’s space
considerations.
Raychem Circuit Protection
PolySwitch Automotive Resettable Devices
239
Table A1. Product Series – Current Rating, Voltage Rating/Typical Resistance for Automotive Devices
AGR
Voltage Rating
Hold Current (A)
0.30
0.50
0.75
0.80
1.00
1.25
1.50
1.60
2.00
2.50
4.00
4.50
5.00
6.00
6.50
7.00
7.50
8.00
9.00
—
—
—
—
—
—
—
—
—
—
0.030Ω
—
0.020Ω
0.015Ω
—
0.011Ω
—
0.0086Ω
0.0070Ω
0.0056Ω
0.0050Ω
0.0046Ω
—
0.0040Ω
—
—
—
—
—
—
—
—
—
—
—
0.029Ω
—
0.018Ω
0.014Ω
—
0.012Ω
—
—
0.0083Ω
—
—
0.0055Ω
—
—
—
—
0.25Ω
—
—
—
0.10Ω
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.16Ω
0.16Ω
—
0.09Ω
0.06Ω
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.60Ω
—
0.30Ω
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0.23Ω
0.90Ω
16V
AHR
16V
AHS
16V
15V
ASMD
30V
60V
4
10.00
11.00
12.00
13.00
14.00
240
PolySwitch Automotive Resettable Devices
Raychem Circuit Protection
Automotive
Table A2. Thermal Derating for Automotive Devices [Hold Current (A) at Ambient Temperature (°C)]
Maximum Ambient Temperature
-40˚C
Part Number
AGR
16V—Leaded
AGR400
AGR500
AGR600
AGR700
AGR800
AGR900
AGR1000
AGR1100
AGR1200
AGR1400
AHR (High Temperature)
16V—Leaded
AHR450
AHR600
AHR650
AHR750
AHR1000
AHR1300
AHS (High Temperature)
16V—Surface-mount
AHS080-2018
AHS160
ASMD
15-60V—Surface-mount
ASMD030
ASMD050
ASMD075
ASMD100
ASMD125
ASMD150
ASMD200
ASMD250
0.35
0.59
0.91
1.37
1.58
1.93
2.63
3.00
0.31
0.53
0.81
1.22
1.40
1.70
2.34
2.66
0.27
0.46
0.71
1.06
1.23
1.50
2.04
2.32
0.23
0.39
0.60
0.90
1.04
1.27
1.73
1.97
0.22
0.37
0.58
0.86
1.00
1.22
1.66
1.89
0.19
0.33
0.50
0.76
0.87
1.07
1.45
1.65
0.17
0.29
0.45
0.68
0.78
0.95
1.30
1.48
0.15
0.26
0.40
0.60
0.70
0.85
1.16
1.32
0.13
0.23
0.35
0.52
0.60
0.74
1.00
1.14
0.11
0.18
0.28
0.41
0.48
0.58
0.80
0.91
—
—
—
—
—
—
—
—
1.20
2.40
1.04
2.10
0.90
1.80
0.80
1.60
0.77
1.55
0.68
1.36
0.62
1.25
0.60
1.20
0.53
1.01
0.46
0.92
0.26
0.52
6.1
8.2
8.8
10.2
13.6
17.7
5.6
7.5
8.1
9.4
12.5
16.3
5.1
6.8
7.4
8.6
11.4
14.8
4.6
6.2
6.7
7.7
10.3
13.4
4.5
6.0
6.5
7.5
10.0
13.0
4.0
5.3
5.7
6.6
8.8
11.4
3.6
4.9
5.3
6.1
8.1
10.5
3.3
4.4
4.8
5.6
7.4
9.6
3.0
4.0
4.3
5.0
6.6
8.6
2.5
3.3
3.6
4.1
5.5
7.2
1.1
1.5
1.6
1.9
2.5
3.3
5.9
7.3
8.8
10.3
11.7
13.2
14.7
16.1
17.6
20.5
5.3
6.6
8.0
9.3
10.7
11.9
13.3
14.6
16.0
18.7
4.8
6.0
7.2
8.4
9.6
10.7
12.0
13.1
14.4
16.8
4.1
5.2
6.2
7.3
8.3
9.4
10.3
11.5
12.4
14.5
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
12.0
14.0
3.5
4.4
5.2
6.2
6.9
7.9
8.7
9.7
10.4
12.1
3.2
4.0
4.8
5.6
6.4
7.2
8.0
8.8
9.6
11.2
2.8
3.6
4.2
5.0
5.6
6.4
7.0
7.8
8.4
9.8
2.5
3.1
3.8
4.4
5.1
5.6
6.3
6.9
7.6
8.9
1.9
2.4
2.8
3.3
3.7
4.2
4.7
5.2
5.6
6.5
—
—
—
—
—
—
—
—
—
—
-20˚C
0˚C
20˚C
25˚C
40˚C
50˚C
60˚C
70˚C
85˚C
125˚C
4
Raychem Circuit Protection
PolySwitch Automotive Resettable Devices
241
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