NTC THERMISTORS:
TYPE GC32
GLASS ENCAPSULATED CHIP THERMISTOR
DESCRIPTION:
Large glass encapsulated chip thermistors on fine diameter
platinum alloy lead-wires.
FEATURES:
•
Lower cost alternative to glass encapsulated
•
•
•
•
•
•
•
•
bead thermistors.
Suitable for high volume, low cost temperature
measurement, control or compensation applications
Fast thermal response times
Suitable for self-heated applications such as liquid level
sensing or gas flow measurement
Recommended for all applications where the customer will
perform further assembly operations
Normal operating/storage temperatures range from
-80°C to +300°C
Unaffected by severe environmental exposures, including
nuclear radiation
Intermittent operation up to 450°C is permissible,
however, stability will be degraded.
Improved beta tolerance with respect to glass
encapsulated beads
DIMENSIONS:
OPTIONS:
•
Non-standard resistance tolerances
•
Non-standard resistance values
•
Reference temperature(s) other than 25°C - specify
•
Mounting in special housings or enclosures
•
Welded or soldered extension leads - specify lead material, diameter, length and insulation, if any.
•
Leads can be pre-tinned or treated for improved soldering
•
Calibration - specify temperature(s)
•
Interchangeable pairs or sets, curve matching - specify temperature range(s) and tolerance(s)
•
Special aging and conditioning for high reliability applications
CODING:
The code number to be ordered may be specified as follows:
GC 32
K
F
513
K
Tolerance code letter (see NOTE 1 and TABLE B)
Zero-power resistance as 25°C (see NOTE 2)
Material System Code Letter (see TABLE A)
Lead configuration code letter.
“K” = adjacent leads only
Nominal Diameter in mils (.032”)
Style “GC” denotes GLASS ENCAPSULATED CHIP structure
NOTE 1:
Special tolerances are available on request. Consult factory for special resistance tolerances, non-standard
resistances and/or non-standard temperatures.
NOTE 2:
The zero-power resistance at 25°C, expressed in Ohms, is identified by a three digit code number. The first two digits
represent significant figures, and the last digit specifies the number of zeros to follow. Example: 51kOhms= “513”.
The standard resistance values are from the 24-Value series decade as specified in Military Standard MS90178.
1.0 / 1.1 / 1.2 / 1.3 / 1.5 / 1.6 / 1.8 / 2.0 / 2.2 / 2.4 / 2.7 / 3.0
3.3 / 3.6 / 3.9 / 4.3 / 4.7 / 5.1 / 5.6 / 6.2 / 6.8 / 7.5 / 8.2 / 9.1
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
NTC THERMISTORS:
GC32
THERMAL AND ELECTRICAL PROPERTIES
TABLE A: THERMAL AND ELECTRICAL PROPERTIES:
The following table lists the THERMAL and ELECTRICAL properties for all LARGE GLASS ENCAPSULATED THERMISTORS.
All definitions and test methods are per MIL-PRF-23648.
THERMISTOR SERIES:
BODY DIMENSIONS:
Nom. Diameter:
Max. Diameter:
Max. Length:
lead-wires:
Nom. Diameter:
Minimum Lead Length:
Lead Material:
Available Cuts:
GC32
.032"
.033"
.084"
(.81 mm)
(.84 mm)
(2.1 mm)
.003" (.08 mm)
.150" (3.8 mm)
Platinum Alloy
“K” adjacent only
* consult factory
for other sizes
and resistance
ranges
MATERIAL SYSTEM:
CODE
R-vs-T
LETTER
CURVE
A
A
A
F
H
G
D
D
GC1
GC2
GC3
GC4
GC5
GC6
GC7
GC8
25/125
RATIO
11.9
14.7
21.1
27.8
28.2
36.4
42.3
50.2
Nominal
Resistance
Range @ 25°C
300
1000
3000
20
100
200
600
1500
–
–
–
–
–
–
–
–
1000 OHMS
3000 OHMS
20000 OHMS
100 kOHMS
200 kOHMS
600 kOHMS
1500 kOHMS
5000 kOHMS
THERMAL TIME CONSTANT:
Still Air at 25°C:
Plunge into Water:
DISSIPATION CONSTANT:
Still Air at 25°C:
Still Water at 25°C:
POWER RATING: (in air)
Maximum Power Rating:
100% Max. Power to:
Derated to 0% at:
.035 Watts
150°C
300°C
.28 mW/°C
1.4 mW/°C
4.5 sec
90 msec
RESISTANCE -VS- TEMPERATURE CHARACTERISTICS: The nominal resistance range for the zero-power resistance at 25°C is shown
for each available Material System. Each Material System is denoted by an ordering Code Letter, a referenced Curve number and
the nominal 25°C/125°C resistance ratio. The R-vs-T Curves are found in table C.
TABLE B: STANDARD TOLERANCES:
Tolerance Code Letter
± % Tolerance at 25°C
F
1
G
2
J
5
K
10
L
15
M
20
S
Non-standard – consult factory
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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