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High Resistance Resistors:Type TG0 pages
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
coefcient 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 performance features of the Type TG Low TC
Precision High Voltage Resistors are:
• Temperature Coefcient: 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 coefcient minimizes the self-drift
due to power dissipation warm-up.
TG931
TG940
TG950
TG980
N
TG985
Non-inductive
performance with
Caddock's exclusive design
All Type TG resistors are produced with
Caddock's Non-inductive Serpentine Pattern.
TG1010
TG1015
Model
No.
Max.
TC
Watt- Continuous Dielect.
age Oper. Volt. Strength ppm/
°C
TG 931
1.0
4,000
TG 940
1.5
TG 950
2.0
TG 980
3.0
15,000
TG 985
4.0
20,000
TG 1010
5.0
TG 1015
6.0
Min.
Resistance
-15
Max.
Min.
750
25
1 Meg
6,000
750
25
1.5 Meg
10,000
1,000
25
2 Meg 128 Meg 200 Meg
1,000
25
3 Meg 192 Meg 300 Meg
1,000
25
4 Meg 320 Meg 400 Meg
25,000
1,000
25
5 Meg 400 Meg 500 Meg
30,000
1,000
25
6 Meg 384 Meg 1000 Meg
40 Meg
50 Meg
64 Meg 100 Meg
Dimensions in inches and (millimeters)
A
B
C
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."
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 Coefcient 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 coefcient for both the Type TG
and Type TK resistors will also minimize ratio drift due
to power dissipation warm-up.
Specications:
Resistance Tolerance: ±1% (tolerances to 0.1%
on special order).
Temperature Coefficient: 25 ppm/°C referenced 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.
ΔR 0.20% max.
Thermal Shock: Mil-Std-202, Method 107,
Cond. B, ΔR 0.20% max.
Moisture Resistance: Mil-Std-202, Method 106,
ΔR 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.
1.500 ± .125
(38.10 ± 3.18)
© 2004 Caddock Electronics, Inc.
CADDOCK
C
DIMENSIONS IN INCHES AND (MILLIMETERS)
100
80
Derating Curve:
RATED POWER OR
RATED VOLTAGE, %
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
B
A
e-mail: caddock@caddock.com • web: www.caddock.com
For Caddock Distributors listed by country see caddock.com/contact/dist.html
60
40
20
0
25
75
125 175
225 275
AMBIENT TEMPERATURE, °C
Sales and Corporate Ofce
1717 Chicago Avenue
Riverside, California 92507-2364
Phone: (951) 788-1700
Fax: (951) 369-1151
28_IL111.1004
