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CAD KDOC
Type USG Ultra-Stable Precision High Voltage Resistors
Lowest TC High Voltage Resistor, 10 ppm/°C from -40°C to +85°C reference to +25°C
0.10% Tolerance, Three body sizes providing voltage ratings of 5KV, 10KV, and 15KV
The very highest performance high voltage applications require
the best possible temperature coefficient and long term stability
from the high voltage resistors that are used in these applications.
To meet these demanding requirements Caddock introduces the
Type USG Ultra-Stable Precision High Voltage Resistors. Utilizing
our proven Tetrinox® resistance film system, these Type USG
resistors were developed to optimize low temperature coefficient
performance and long term stability performance. By utilizing
specific ceramic core materials with optimum Tetrinox® processing,
we are able to control, very tightly in manufacturing, the important
ultra-stable performance parameters in operating temperatures
from -40°C to +85°C. This unique process is offered in specific
resistance values in three body sizes. The extraordinary operating
stability of the Type USG resistors will improve the performance
of your high voltage system.
The performance features of the Type USG Ultra-Stable
Precision High Voltage Resistors are:
• Temperature Coefficient: 10 ppm/°C from -40°C to +85°C.
• Tolerance: 0.10%
• Typical Load Life Stability of 0.025% per 1,000 hours
at +85°C, 0.05% per 1000 hrs. maximum.
• Three body sizes provide continuous voltage ratings of 5KV,
10KV, and 15KV.
• The specific resistances that are offered in each body size
have been selected for produceability of optimum performance.
• The Ultra Low Temperature Coefficient minimizes self
heating (warm-up) drift following the application of high
voltage or resulting from a change in the applied high voltage.
• Custom Low TC HV Strings are available: 50KV, 100KV, etc.
Part Number
(Model-Value-Tol.-TC)
USG1105 - 50M - 0.10%-10ppm
0.10%
5 KV
Tolerance
Max. Continuous
Operating Voltage
50 Meg
Dimensions in inches and (millimeters)
A
B C
Resistance (Ω)
TC ppm/°CAmbient Max.
Operating
Temperature
10 ppm/°C 85
°C
Dielectric
Strength
1,000
USG1105 - 75M - 0.10%-10ppm
USG1110 - 100M - 0.10%-10ppm
USG1110 - 150M - 0.10%-10ppm
USG1115 - 150M - 0.10%-10ppm
USG1115 - 200M - 0.10%-10ppm
5 KV
10 KV
10 KV
15 KV
15 KV
75 Meg
100 Meg
150 Meg
150 Meg
200 Meg
0.10%
0.10%
0.10%
0.10%
0.10%
10 ppm/°C
10 ppm/°C
10 ppm/°C
10 ppm/°C
10 ppm/°C
85
°C
85°C
85°C
85°C
85°C
1,000
1,000
1,000
1,000
1,000
.040 ±.002
(1.02 ±.05)
.350 ±.040
(8.89 ±1.02)
2.000 ±.080
(50.80 ±2.03)
.040 ±.002
(1.02 ±.05)
.350 ±.040
(8.89 ±1.02)
3.000 ±.090
(76.20 ±2.29)
.040 ±.002
(1.02 ±.05)
.350 ±.040
(8.89 ±1.02)
2.000 ±.080
(50.80 ±2.03)
.040 ±.002
(1.02 ±.05)
.350 ±.040
(8.89 ±1.02)
3.000 ±.090
(76.20 ±2.29)
.040 ±.002
(1.02 ±.05)
.350 ±.040
(8.89 ±1.02)
1.250 ±.070
(31.75 ±1.78)
.040 ±.002
(1.02 ±.05)
.350 ±.040
(8.89 ±1.02)
1.250 ±.070
(31.75 ±1.78)
1
2
Specifications:
(Numbers inside circles reference columns in
part number table above)
1
2
Tolerance: ±0.1% measured at room
temperature (23°C ±2°C) at 100 Vdc.
Temperature Coefficient: 10 ppm/°C, refer-
enced to +25°C. ΔR taken at -40°C and +85°C,
measured at 50% of rated voltage.
Insulation Resistance: 10,000 megohms, min.
Overvoltage: 1.5 times maximum continuous
operating voltage for 5 seconds, ΔR 0.05%
max.
Thermal Shock: Mil-Std-202, Method 107,
condition A, ΔR 0.05% max.
Moisture Resistance: Mil-Std-202, Method
106, ΔR 0.05% max.
Load Life: 1000 hours at +85°C at rated voltage,
ΔR 0.025% typical, ΔR 0.05% max.
Solderable Leads
Encapsulation: High temperature silicone
conformal.
Storage Temperature: -40°C to +105°C.
DIMENSIONS IN INCHES AND (MILLIMETERS)
1.500 ± .125
(38.10 ± 3.18)
AB
C
Precise Low TC Voltage Division
Precise Voltage Division Ratio performance can be formed using Type USG
Ultra-Stable High Voltage Resistors together with Caddock's Type USF
Ultra-Stable Precision Film Resistors, or "matched" with selected Type TK Low
TC Precision Radial-Lead Resistors. Consult Caddock Applications
Engineering to optimize voltage division ratio performance for your
application. The Low TC of the Type USG resistors minimizes temperature
related drift due to temperature gradients that may exist due to the
placement of the resistor components in the high voltage
assembly.
Low Absolute TC,
Ultra-Precision Tolerance,
with Type USF Resistors
Special Matched Resistors for
Lowest Ratio TC with Type TK Low
TC Radial Lead Resistors
28_IL135.1004
