P-20 Datasheet, PDF (2/4 Pages) –

Type P20/25/30 Specifications
NTC Types
P20/25/30
dimensions
Thermal and Electrical Properties (All Def initions and Test Methods are Per MIL-PRF-23648)
Body
Dimensions:
Thermistor Type:
P20
Minimum Diameter:
.020 in (.51 mm)
Standard
code “AA”
.063 in (1.6 mm)
Body
“L”
code “A”
.125 in (3.2 mm)
Lengths
code “B”
.250 in (6.3 mm)**
Lead-wires:
Nom. Diameter:
.0011 in (.03 mm)
Minimum Lead Length:
.250 in (6.3 mm)
Lead Material:
Platinum Alloy
Material System:
Nominal
Resistance
Code
Letter
R-vs-T
Curve
25/125
Ratio
Range @
77°F (25°C)
E
0
5.0
—
A
1
11.8
300 Ω to 680 Ω
A
2
12.5
680 Ω to 1.6 kΩ
A
3
14.0
1.6 kΩ to 3.6 kΩ
A
4
16.9
3.6 kΩ to 6.8 kΩ
A
5
19.8
6.8 kΩ to 27 kΩ
A
6
22.1
–
A
7
22.7
27 kΩ to 75 kΩ
B
8
29.4
75 kΩ to 130 kΩ
B
9
30.8
130 kΩ to 240 kΩ
B
10
32.3
240 kΩ to 360 kΩ
B
11
35.7
360 kΩ to 820 kΩ
B
12
38.1
820 kΩ to 1.3 MΩ
B
13
45.0
1.3 MΩ to 3.3 MΩ
B
14
48.1
3.3 MΩ to 6.8 MΩ
B
15
56.5
6.8 MΩ to 10 MΩ
D
16
75.6
—
D
16
81.0
—
Thermal Time Constant:
Still Air at 77°F (25°C):
1.6 sec
Plunge into Water:
18 msec
Dissipation Constant:
Still Air at 77°F (25°C):
.14 mW/°C
Still Water at 77°F (25°C):
.70 mW/°C
Power Rating: (in air)
Maximum Power Rating:
.020 Watts
100% Max. Power to:
302 (150°C)
Derated to 0% at:
572°F (300°C)
P25
.025 in (.64 mm)
—
.125 in (3.2 mm)
.250 in (6.3 mm)
.002 in (.05 mm)
.250 in (6.3 mm)
Platinum Alloy
Nominal
Resistance
Range @
77°F (25°C)
—
300 Ω to 680 Ω
680 Ω to 1.6 kΩ
1.6 kΩ to 3.6 kΩ
3.6 kΩ to 6.8 kΩ
6.8 kΩ to 27 kΩ
–
27 kΩ to 75 kΩ
75 kΩ to 130 kΩ
130 kΩ to 240 kΩ
240 kΩ to 360 kΩ
360 kΩ to 820 kΩ
820 kΩ to 1.3 MΩ
1.3 MΩ to 3.3 MΩ
3.3 MΩ to 6.8 MΩ
6.8 MΩ to 10 MΩ
—
—
2.0 sec
23 msec
.16 mW/°C
.80 mW/°C
.025 Watts
302 (150°C)
572°F (300°C)
P30
030 in (.76 mm)
—
.125 in (3.2 mm)
.250 in (6.3 mm)
.003 in (.08 mm)
.250 in (6.3 mm)
Platinum Alloy
Resistance
Range @
77°F (25°C)
—
100 Ω to 300 Ω
300 Ω to 750 Ω
750 Ω to 1.5 kΩ
1.5 kΩ to 3.0 kΩ
.0 kΩ to 6.8 kΩ
6.8 kΩ to 13 kΩ
13 kΩ to 18 kΩ
18 kΩ to 51 kΩ
51 kΩ to 82 kΩ
82 kΩ to 150 kΩ
150 kΩ to 330 kΩ
330 kΩ to 680 kΩ
680 kΩ to 1.5 MΩ
1.5 MΩ to 3.0 MΩ
3.0 MΩ to 6.2 MΩ
6.2 MΩ to 10 MΩ
—
3.0 sec
60 msec
.30 mW/°C
1.50 mW/°C
.035 Watts
302 (150°C)
572°F (300°C)
Resistance vs temperature characterstics: The nominal resistance range for the zero-power resistance at 77°F (25°C) is shown for each miniature bead-in-glass thermoprobe type and each
available material system. Each material system is denoted by an ordering code letter, a referenced curve number and the nominal 77°F/257°F (25°C/125°C) resistance ratio.
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