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.
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.
®
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.
• The low temperature coefficient minimizes the self-drift
due to power dissipation warm-up.
TG931
TG940
TG950
TG980
TG985
Non-inductive
performance with
Caddock's exclusive design
N
All Type TG resistors are produced with
Caddock's Non-inductive Serpentine Pattern.
TG1010
TG1015
Resistance
Dimensions in inches and (millimeters)
Max.
Continuous
Oper. Volt.
TC
ppm/
°C
Specifications:
Resistance Tolerance: ±1% (tolerances to 0.1%
Model Watt-
age
Dielect.
Strength
-15
Min.
No.
A
B
C
Min.
Max.
1.000 ±.060
.315 ±.030 .040 ±.002
on special order).
Temperature Coefficient: 25 ppm/°C refer-
enced to +25°C, ΔR taken at -55°C and +125°C.
TG931
TG940
TG950
TG980
TG985
1.0
1.5
2.0
3.0
4.0
4,000
6,000
750
25
1 Meg 40 Meg 50 Meg
(25.40 ±1.52) (8.00 ±.76) (1.02 ±.05)
1.500 ±.060 .315 ±.030 .040 ±.002
750
25 1.5 Meg 64 Meg 100 Meg
(38.10 ±1.52) (8.00 ±.76) (1.02 ±.05)
2.125 ±.060
.315 ±.030 .040 ±.002
10,000
15,000
20,000
25,000
30,000
1,000
1,000
1,000
1,000
1,000
25
25
25
25
25
2 Meg 128 Meg 200 Meg
3 Meg 192 Meg 300 Meg
4 Meg 320 Meg 400 Meg
5 Meg 400 Meg 500 Meg
6 Meg 384 Meg 1000 Meg
Insulation Resistance: 10,000 Megohms, min.
(53.98 ±1.52) (8.00 ±.76) (1.02 ±.05)
3.125 ±.060 .315 ±.030 .040 ±.002
(79.38 ±1.52) (8.00 ±.76) (1.02 ±.05)
4.000 ±.120 .315 ±.030 .040 ±.002
(101.60 ±3.05) (8.00 ±.76) (1.02 ±.05)
Overload/Overvoltage: 5 times rated power with
applied voltage not to exceed 1.5 times maximum
continuous operating voltage for 5 seconds.
ΔR 0.20% max.
Thermal Shock: Mil-Std-202, Method 107,
Cond. B, ΔR 0.20% max.
5.000 ±.120
.315 ±.030 .040 ±.002
TG1010 5.0
TG1015 6.0
(127.00 ±3.05) (8.00 ±.76) (1.02 ±.05)
6.000 ±.120 .350 ±.040 .040 ±.002
(152.40 ±3.05) (8.89 ±1.02) (1.02 ±.05)
Moisture Resistance: Mil-Std-202, Method 106,
ΔR 0.20% max.
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."
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.
B
1.500 ± .125
A
C
(38.10 ± 3.18)
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.
DIMENSIONS IN INCHES AND (MILLIMETERS)
100
Derating Curve:
80
60
RATED POWER OR
With special matching, a Ratio TC of 10 ppm/°C can be achieved.
RATED VOLTAGE, % 40
20
The low temperature coefficient for both the Type TG
and Type TK resistors will also minimize ratio drift due
to power dissipation warm-up.
0
25
75
125
175
225 275
AMBIENT TEMPERATURE, °C
Certain products shown in this catalog are covered by one or more patents, there are also patents pending.
Applications Engineering
17271 North Umpqua Hwy.
Roseburg, Oregon 97470-9422
Phone: (541) 496-0700
Fax: (541) 496-0408
Sales and Corporate Office
1717 Chicago Avenue
Riverside, California 92507-2364
Phone: (951) 788-1700
e-mail: caddock@caddock.com • web: www.caddock.com
For Caddock Distributors listed by country see caddock.com/contact/dist.html
Fax: (951) 369-1151
© 2004 Caddock Electronics, Inc.
28_IL111.1004