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Phone: (541) 496-0700
Fax: (541) 496-0408
e-mail: caddock@caddock.com • web: www.caddock.com
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© 2004 Caddock Electronics, Inc.
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DOC
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 geophysical instruments.
Type TG Low TC Precision High Voltage Resistors
All Type TG resistors are produced with
Caddock's Non-inductive Serpentine Pattern.
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.
TG985
TG980
TG950
TG931
TG1010
TG1015
TG940
TC of 25 ppm/°C from -55°C to +125°C, Resistance Range from 1 Megohm to 1,000 Megohms
1.500 ± .125
(38.10 ± 3.18)
A
B
C
AMBIENT TEMPERATURE, °C
100
80
60
40
20
0
25
75
125
175
225 275
RATED POWER OR
RATED VOLTAGE, %
Derating Curve:
DIMENSIONS IN INCHES AND (MILLIMETERS)
Dielect.
Strength
Max.
Continuous
Oper. Volt.
Watt-
age
Model
No.
A
B
C
Dimensions in inches and (millimeters)
Resistance
Min.
Max.
TG931
1.000 ±.060
(25.40 ±1.52)
.315 ±.030
(8.00 ±.76)
.040 ±.002
(1.02 ±.05)
TG940
1.500 ±.060
(38.10 ±1.52)
.315 ±.030
(8.00 ±.76)
.040 ±.002
(1.02 ±.05)
TG950
2.125 ±.060
(53.98 ±1.52)
.315 ±.030
(8.00 ±.76)
.040 ±.002
(1.02 ±.05)
TG980
3.125 ±.060
(79.38 ±1.52)
.315 ±.030
(8.00 ±.76)
.040 ±.002
(1.02 ±.05)
TG985
4.000 ±.120
(101.60 ±3.05)
.315 ±.030
(8.00 ±.76)
.040 ±.002
(1.02 ±.05)
TG1010
5.000 ±.120
(127.00 ±3.05)
.315 ±.030
(8.00 ±.76)
.040 ±.002
(1.02 ±.05)
TG1015
6.000 ±.120
(152.40 ±3.05)
.350 ±.040
(8.89 ±1.02)
.040 ±.002
(1.02 ±.05)
1.0
1.5
2.0
3.0
4.0
5.0
6.0
4,000
6,000
10,000
15,000
20,000
25,000
30,000
750
750
1,000
1,000
1,000
1,000
1,000
25
25
25
25
25
25
25
1 Meg
1.5 Meg
2 Meg
3 Meg
4 Meg
5 Meg
6 Meg
50 Meg
100 Meg
200 Meg
300 Meg
400 Meg
500 Meg
1000 Meg
TC
ppm/
°
C
-15
Min.
40 Meg
64 Meg
128 Meg
192 Meg
320 Meg
400 Meg
384 Meg
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.
"
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 TK133 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.
Certain products shown in this catalog are covered by one or more patents, there are also patents pending.
Specifications:
Resistance Tolerance: ±1% (tolerances to 0.1%
on special order).
Temperature Coefficient: 25 ppm/°C refer-
enced to +25°C, ΔR 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.
Δ
R 0.20% max.
Thermal Shock: Mil-Std-202, Method 107,
Cond. B, ΔR 0.20% max.
Moisture Resistance: Mil-Std-202, Method 106,
Δ
R 0.20% max.
Load Life: 1,000 hours at +125°C at rated
voltage, not to exceed rated power, ΔR 0.25%.
Solderable Leads
Encapsulation: High Temperature Silicone
Conformal.
N Non-inductive
performance with
Caddock's exclusive design
28_IL111.1004
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