PTC THERMISTORS:
TYPE PTF
OVER-CURRENT PROTECTION
DESCRIPTION:
PTC disc thermistor for overcurrent and
short-circuit protection
FEATURES:
•
Low cost solid state fuse
•
Available in a broad range of resistances,
transition temperatures and voltage ratings
•
Exhibits large positive increases in resistance
with temperature
•
Wide range of trip and non-trip currents; from
30mA to 2.3 amps
•
Resistance/temperature characteristic is
infinitely repeatable and has no hysteresis
associated with its action
•
Proven quality and reliability over many years of
manufacture
•
Standard options include protective coating and
tape and reeled to EIA RS-468A
DIMENSIONS:
Operating R25°C
Voltage (±20%)
5
12
12
12
12
12
12
12
12
12
12
25
25
25
25
25
25
25
50
50
50
50
50
50
0.5
1.0
2.5
5.0
10.0
25.0
1.0
2.5
5.0
10.0
25.0
1.5
3.0
0.5
1.0
1.5
3.0
5.0
5.0
10.0
25.0
50.0
Type
RL6505-0.5-110-5-PTF
RL5305-1.0-110-12-PTF
RL5305-2.5-110-12-PTF
RL4005-5.0-110-12-PTF
RL3005-10-110-12-PTF
RL3005-25-110-12-PTF
RL5004-1.0-120-12-PTF
RL3104-2.5-120-12-PTF
RL2204-5.0-120-12-PTF
RL1604-10-120-12-PTF
RL1004-25-120-12-PTF
RL7008-1.5-110-25-PTF
RL5008-3.0-110-25-PTF
RL6904-0.5-120-25-PTF
RL4904-1.0-120-25-PTF
RL4004-1.5-120-25-PTF
RL2804-3.0-120-25-PTF
RL2204-5.0-120-25-PTF
RL5506-5.0-110-50-PTF
RL4006-10-110-50-PTF
RL4508-25-110-50-PTF
RL4010-50-110-50-PTF
Minimum
Maximum
Switch Current No-Switch Current
0°C
25°C
25°C
55°C
“H”
D.C.
Joules/°C mW/°C
A
(max)
in.
0.70
0.60
0.60
0.45
0.35
0.35
0.59
0.41
0.29
0.23
0.17
0.75
0.55
0.75
0.55
0.46
0.34
0.28
0.60
0.45
0.50
0.45
0.42
0.40
mm.
17.8
15.2
15.2
11.4
8.9
8.9
15.0
10.4
7.4
5.8
4.3
19.1
14.0
19.1
14.0
11.7
8.6
7.1
15.2
11.4
12.7
11.4
10.7
10.2
B
(max)
in.
0.16
0.15
0.16
0.15
0.15
0.15
0.14
0.14
0.14
0.14
0.14
0.18
0.18
0.14
0.14
0.14
0.14
0.14
0.16
0.17
0.18
0.20
0.20
0.23
mm.
4.1
3.8
4.1
3.8
3.8
3.8
3.6
3.6
3.6
3.6
3.6
4.6
4.6
3.6
3.6
3.6
3.6
3.6
4.1
4.3
4.6
5.1
5.1
5.8
in.
C
ref.
mm.
8.4
8.4
8.4
6.4
6.4
6.4
6.4
3.8
2.5
2.5
1.8
8.4
8.4
8.4
8.4
6.4
3.8
3.8
8.4
6.4
8.4
8.4
6.4
6.4
0.33
0.33
0.33
0.25
0.25
0.25
0.25
0.15
0.10
0.10
0.07
0.33
0.33
0.33
0.33
0.25
0.15
0.15
0.33
0.25
0.33
0.33
0.25
0.25
AWG
No.
20
22
20
24
24
24
24
24
24
24
24
20
22
22
22
24
24
24
22
24
22
22
24
20
2.32
1.45
0.92
0.55
0.32
0.20
1.40
0.65
0.37
0.22
0.11
1.34
0.84
2.41
1.39
1.00
0.56
0.37
0.65
0.39
0.27
0.19
2.07
1.29
0.82
0.49
0.29
0.18
1.25
0.58
0.34
0.20
0.09
1.19
0.74
2.16
1.25
0.90
0.50
0.34
0.58
0.34
0.24
0.17
0.12
0.07
1.40
0.87
0.55
0.33
0.19
0.12
0.87
0.40
0.23
0.13
0.07
0.81
0.50
1.49
0.86
0.62
0.34
0.23
0.39
0.23
0.16
0.11
0.08
0.05
1.02
0.64
0.40
0.24
0.14
0.09
0.67
0.31
0.18
0.10
0.05
0.59
0.37
1.16
0.67
0.48
0.27
0.18
0.29
0.17
0.12
0.08
0.06
0.04
0.8
0.6
0.6
0.3
0.2
0.2
0.4
0.2
0.1
0.04
0.02
1.50
0.80
0.8
0.4
0.3
0.1
0.1
0.7
0.4
0.6
0.6
0.6
0.5
18
14
14
10
7
7
12.0
6.5
4.3
2.9
1.7
18
14
17.8
11.9
9.2
5.7
4.3
14
10
12
12
12
9
100.0 RL3810-100-110-50-PTF 0.13
200.0 RL3312-200-110-50-PTF 0.08
BOWTHORPE THERMOMETRICS
Crown Industrial Estate, Priorswood Road
Taunton, Somerset TA2 8QY UK
Tel +44 (0) 1823 335200
Fax +44 (0) 1823 332637
THERMOMETRICS, INC.
808 US Highway 1
Edison, New Jersey 08817-4695 USA
Tel +1 (732) 287 2870
Fax +1 (732) 287 8847
KEYSTONE THERMOMETRICS CORPORATION
967 Windfall Road
St. Marys, Pennsylvania 15857-3397 USA
Tel +1 (814) 834 9140
Fax +1 (814) 781 7969
PTC THERMISTORS:
TYPE PTF
OVER-CURRENT PROTECTION
Operating R25°C
Voltage (±20%)
50
50
50
50
50
50
50
50
120
120
120
120
120
120
120
120
120
120
240
240
240
240
240
240
240
240
240
240
480
480
480
480
1.0
2.5
5.0
10.0
25.0
50.0
100.0
200.0
10.0
20.0
50.0
100.0
2.5
5.0
10.0
20.0
50.0
100.0
50.0
100.0
250.0
2.5
5.0
10.0
20.0
50.0
100.0
250.0
25.0
50.0
100.0
200.0
Type
RL7005-1.0-120-50-PTF
RL4505-2.5-120-50-PTF
RL3205-5.0-120-50-PTF
RL2505-10-120-50-PTF
RL1605-25-120-50-PTF
RL1604-50-120-50-PTF
RL1604-100-120-50-PTF
RL1604-200-120-50-PTF
RL7510-10-110-120-PTF
RL6010-20-110-120-PTF
RL4510-50-110-120-PTF
RL3510-100-110-120-PTF
RL8908-2.5-120-120-PTF
RL6308-5.0-120-120-PTF
RL4508-10-120-120-PTF
RL3008-20-120-120-PTF
RL2008-50-120-120-PTF
RL1706-100-120-120-PTF
RL6315-50-110-240-PTF
RL6315-100-110-240-PTF
RL6315-250-110-240-PTF
RL9912-2.5-120-240-PTF
RL8311-5.0-120-240-PTF
RL6011-10-120-240-PTF
RL4211-20-120-240-PTF
RL2611-50-120-240-PTF
RL2610-100-120-240-PTF
RL2610-250-120-240-PTF
RL6017-25-120-480-PTF
RL4217-50-120-480-PTF
RL3517-100-120-480-PTF
RL3517-200-120-480-PTF
Minimum
Maximum
Switch Current No-Switch Current
0°C
25°C
25°C
55°C
“H”
D.C.
Joules/°C mW/°C
A
(max)
in.
0.75
0.50
0.37
0.30
0.21
0.21
0.21
0.21
0.80
0.65
0.50
0.40
0.94
0.68
0.50
0.35
0.25
0.23
0.65
0.65
0.65
1.04
0.88
0.65
0.47
0.31
0.31
0.31
0.65
0.47
0.41
0.41
mm.
19.1
12.7
9.4
7.6
5.3
5.3
5.3
5.3
20.3
16.5
12.7
10.2
23.9
17.3
12.7
8.9
6.4
5.8
16.5
16.5
16.5
26.4
22.4
16.5
11.9
7.9
7.9
7.9
16.5
11.9
10.4
10.4
B
(max)
in.
0.15
0.15
0.15
0.15
0.15
0.14
0.14
0.14
0.23
0.23
0.20
0.20
0.18
0.18
0.18
0.18
0.18
0.16
0.27
0.27
0.27
0.22
0.21
0.21
0.21
0.21
0.20
0.20
0.27
0.27
0.27
0.27
mm.
3.8
3.8
3.8
3.8
3.8
3.6
3.6
3.6
5.8
5.8
5.1
5.1
4.6
4.6
4.6
4.6
4.6
4.1
6.9
6.9
6.9
5.6
5.3
5.3
5.3
5.3
5.1
5.1
6.9
6.9
6.9
6.9
in.
C
ref.
mm.
8.4
8.4
6.4
3.8
3.8
3.8
3.8
3.8
8.4
8.4
8.4
6.4
8.4
8.4
8.4
6.4
3.8
3.8
8.4
8.4
8.4
8.4
8.4
8.4
8.4
6.4
6.4
6.4
8.4
8.4
6.4
6.4
0.33
0.33
0.25
0.15
0.15
0.15
0.15
0.15
0.33
0.33
0.33
0.25
0.33
0.33
0.33
0.25
0.15
0.15
0.33
0.33
0.33
0.33
0.33
0.33
0.33
0.25
0.25
0.25
0.33
0.33
0.25
0.25
AWG
No.
22
24
24
24
24
24
24
24
24
20
20
22
22
20
22
24
24
24
18
18
18
20
20
22
24
24
24
24
22
24
24
24
1.76
0.87
0.48
0.30
0.14
0.10
0.07
0.06
0.55
0.37
0.19
0.13
1.32
0.76
0.44
0.25
0.14
0.09
0.23
0.16
0.10
1.46
0.95
0.53
0.31
0.16
0.11
0.07
0.35
0.21
0.13
0.09
1.58
0.78
0.43
0.27
0.13
0.09
0.06
0.05
0.49
0.33
0.17
0.11
1.18
0.68
0.40
0.23
0.13
0.08
0.21
0.15
0.09
1.31
0.85
0.48
0.28
0.14
0.10
0.06
0.32
0.19
0.12
0.08
1.09
0.54
0.30
0.18
0.09
0.06
0.04
0.03
0.33
0.22
0.11
0.08
0.82
0.47
0.27
0.16
0.09
0.05
0.14
0.10
0.06
0.90
0.59
0.33
0.19
0.10
0.07
0.04
0.22
0.13
0.08
0.06
0.84
0.42
0.23
0.14
0.07
0.05
0.03
0.02
0.24
0.16
0.08
0.06
0.63
0.37
0.21
0.12
0.07
0.04
0.10
0.07
0.05
0.70
0.46
0.26
0.15
0.08
0.05
0.03
0.17
0.10
0.06
0.04
1.1
0.5
0.2
0.1
0.1
0.1
0.1
0.1
2.2
1.4
0.8
0.5
2.7
1.4
0.7
0.4
0.1
0.1
2.3
2.3
2.3
4.6
3.5
1.7
0.9
0.2
0.2
0.2
2.4
1.3
0.8
0.8
19.0
11.7
7.1
5.4
3.2
3.2
3.2
3.2
20
18
12
11
26.7
17.8
12.0
7.8
6.0
4.3
18
18
18
32.6
27.7
17.6
12.1
8.0
8.0
8.0
19.1
13.3
10.7
10.7
OPTIONS:
•
Protective coating, replace “PTF” suffix with “PFC”
•
Tape and reel, replace “PTF” suffix with “PFR”
•
Coated and T&R, replace “PTF” suffix with “PFCR”
•
Other resistances
•
Other tolerances, other transition temperatures
•
Alternate size and configurations
•
Other voltage ratings
BOWTHORPE THERMOMETRICS
Crown Industrial Estate, Priorswood Road
Taunton, Somerset TA2 8QY UK
Tel +44 (0) 1823 335200
Fax +44 (0) 1823 332637
THERMOMETRICS, INC.
808 US Highway 1
Edison, New Jersey 08817-4695 USA
Tel +1 (732) 287 2870
Fax +1 (732) 287 8847
KEYSTONE THERMOMETRICS CORPORATION
967 Windfall Road
St. Marys, Pennsylvania 15857-3397 USA
Tel +1 (814) 834 9140
Fax +1 (814) 781 7969
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