Type TG Low TC Precision High Voltage Resistors
TC of 25 ppm/°C from -55°C to +125°C, Resistance Range from 1 Megohm to 1,000 Megohms
To meet the precision temperature stability requirements
of high accuracy, high voltage systems, Caddock introduces
the Type TG Low TC Precision High Voltage Resistors.
These resistors utilize our proven Tetrinox
®
resistance
system to achieve the unique combination of low temperature
coefficient with high stability performance at high operating
voltages.
The Type TG Low TC Precision High Voltage Resistors
are designed to meet the demanding stability requirements of
TWT power supplies, electron microscopes, X-ray systems,
high resolution CRT displays, and geoph ysical instruments.
TG931
The performance features of the Type TG Low TC
Precision High Voltage Resistors are:
•
Temperature
Coefficient: 25 ppm/°C from -55°C to +125°C.
•
Load Life Stability of 0.25% per 1,000 hours at +125°C.
•
Resistance Tolerance from ±1.0% to ±0.1%.
•
Resistance Range from 1 Megohm to 1,000 Megohms.
•
Maximum Continuous Operating Temperature of +225°C.
•
The low temperature coefficient minimizes the self-drift
due to power dissipation warm-up.
TG940
TG950
TG980
N
Non-inductive
performance with
Caddock's exclusive design
TG985
All Type TG resistors are produced with
Caddock's Non-inductive Serpentine Pattern.
TG1010
TG1015
Model
No.
Max.
TCp
Watt- Continuous Dielect.
age Oper. Volt. Strength pm/°
C
Resistance
-15
Min.
Max.
Min.
Dimensions in inches and (millimeters)
A
B
C
Specifications:
TG931
TG940
1.0
1.5
4,000
6,000
750
750
25
25
1 Meg
1.5 Meg
40 Meg
50 Meg
64 Meg
100 Meg
TG950
TG980
TG985
2.0
3.0
4.0
10,000
15,000
20,000
1,000
1,000
1,000
25
25
25
2 Meg 128 Meg 200 Meg
3 Meg 192 Meg 300 Meg
4 Meg
320 Meg
400 Meg
TG1010
TG1015
5.0
6.0
25,000
30,000
1,000
1,000
25
25
5 Meg 400 Meg 500 Meg
6 Meg
384 Meg
1000 Meg
1.000
±.060
(25.40
±1.52)
1.500
±.060
(38.10
±1.52)
2.125
±.060
(53.98
±1.52)
3.125
±.060
(79.38
±1.52)
4.000
±.120
(101.60
±3.05)
5.000
±.120
(127.00
±3.05)
6.000
±.120
(152.40
±3.05)
.315
±.030
(8.00
±.76)
.315
±.030
(8.00
±.76)
.315
±.030
(8.00
±.76)
.315
±.030
(8.00
±.76)
.315
±.030
(8.00
±.76)
.315
±.030
(8.00
±.76)
.350
±.040
(8.89
±1.02)
.040
±.002
(1.02
±.05)
.040
±.002
(1.02
±.05)
.040
±.002
(1.02
±.05)
.040
±.002
(1.02
±.05)
.040
±.002
(1.02
±.05)
.040
±.002
(1.02
±.05)
.040
±.002
(1.02
±.05)
Extended Maximum Continuous Operating Voltage Rating
Maximum continuous operating voltages up to 60% higher than the values listed
in the table can be achieved through special factory conditioning. To specify
maximum continuous operating voltages above the values listed in the table, add a
"-15" to the model number (Example: TG950-15). Note that the standard overload
and overvoltage ratings do not apply to the "-15" resistors. Resistance range for
"-15" resistors shown in the table are from "-15 Min." to "Max."
Resistance Tolerance:
±1% (tolerances to 0.1%
on special order).
Temperature Coefficient:
25 ppm/°C refer-
enced to +25°C,
∆R
taken at -55°C and +125°C.
Insulation Resistance:
10,000 Megohms, min.
Overload/Overvoltage:
5 times rated power with
applied voltage not to exceed 1.5 times maximum
continuous operating voltage for 5 seconds.
∆R
0.20% max.
Thermal Shock:
Mil-Std-202, Method 107,
Cond. B,
∆R
0.20% max.
Moisture Resistance:
Mil-Std-202, Method 106,
∆R
0.20% max.
Load Life:
1,000 hours at +125°C at rated
voltage, not to exceed rated power,
∆R
0.25%.
Solderable Leads
Encapsulation:
High Temperature Silicone
Conformal.
1.500
±
.125
(38.10
±
3.18)
A
B
C
Combine Type TG and Type TK Resistors for Low Ratio TC Tracking
The Type TG Low TC Precision High Voltage Resistors can be
used in combination with the low Absolute Temperature Coefficient of
the Type TK Low TC Precision Radial-Lead Film Resistors
(Model TK233 with TC of 5 ppm/°C) to achieve 30 ppm/°C Ratio
TC without special matching.
With special matching, a
Ratio TC of 10 ppm/°C
can be achieved.
The low temperature coefficient for both the Type TG
and Type TK resistors will also minimize ratio drift due
to power dissipation warm-up.
DIMENSIONS IN INCHES AND (MILLIMETERS)
Derating Curve:
100
80
60
RATED POWER OR
RATED VOLTAGE, %
40
20
0
25
AMBIENT TEMPERATURE,
°C
75
125
175
225
275
e-mail: caddock@caddock.com • web: www.caddock.com
For Caddock Distributors listed by country see caddock.com/contact/dist.html
© 2003-2017 Caddock Electronics, Inc.
ELECTRONICS, INC.
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Roseburg, Oregon 97470-9422
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