Type MG Precision High Voltage Resistors
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Now with Extended Resistance Range to 10,000 Megohms and Additional Models
Temperature Coefficient as tight as 80 ppm/°C, Combined with Excellent Long-Term Stability and Precision Tolerances.
Caddock's Micronox® resistance films are the source of
the Type MG Precision High Voltage Resistors' outstanding
combination of performance features:
Preconditioning for Power and Voltage Ratings
All power ratings and maximum operating voltage ratings
are for continuous duty. These ratings are based on pre-
stress voltage levels applied during the manufacturing
process to provide for stable resistor performance even
under momentary overload conditions.
Maximum operating voltages 60% higher than the values
listed in the table may be specified by adding "-15" to the
model number (Example: MG750-15). Note that overload
and overvoltage ratings do not apply to the "-15" resistors.
Resistance ranges for "-15" resistors shown in the table are
from "-15 Min." to "Standard Max."
• Single-resistor values as high as 10,000 Megohms.
• Maximum continuous operating voltages as high as
48,000 volts ("-15" ratings).
• Overvoltage capabilities of 150% of standard working
voltages for all models and values, (except "-15" ratings).
• Resistance Tolerances from ±1.0% to ±0.1%.
• Temperature Coefficient, for standard resistance range, of
80 ppm/°C in combination with resistance tolerances as
tight as ±0.1%.
• Type MG resistors have demonstrated stability of 0.01%
per 1,000 hours in extended load life testing of standard
resistance range values.
This exceptional performance has been proven through
many years of use in equipment that demands the highest
reliability and stability, including TWT amplifiers, X-ray
systems, geophysical instruments, and medical electronics.
Non-Inductive Performance
Most models are manufactured with Caddock's
Non-Inductive Design which uses a serpentine resistive
pattern that provides for neighboring lines to carry current in
opposite directions, thereby achieving maximum cancellation
of flux fields over the entire length of the resistor. This
efficient non-inductive construction is accomplished without
derating of any performance advantages.
Resistance
Standard Extended
Dimensions in inches and (millimeters)
Specifications:
Resistance Tolerance:
Max.
Continuous
Oper. Volt.
Model Watt-
Overload Dielect.
Rating Strength
-15
No.
age
A
B
C
Min.
Max.
Max.
Min.
.094 ±.015
(2.39 ±.38)
.109 ±.025
(2.77 ±.64)
.094 ±.015
(2.39 ±.38)
.094 ±.015
(2.39 ±.38)
.094 ±.015
(2.39 ±.38)
.140 ±.030
(3.56 ±.76)
.150 ±.030
(3.81 ±.76)
.140 ±.030
(3.56 ±.76)
.140 ±.030
(3.56 ±.76)
.240 ±.030
(6.10 ±.76)
.140 ±.030
(3.56 ±.76)
.240 ±.030
(6.10 ±.76)
.140 ±.030
(3.56 ±.76)
.240 ±.030
(6.10 ±.76)
.315 ±.030
(8.00 ±.76)
.240 ±.030
(6.10 ±.76)
.313 ±.020
(7.95 ±.51)
.313 ±.030
(7.95 ±.76)
.025 ±.002
(.64 ±.05)
.025 ±.002
(.64 ±.05)
.025 ±.002
(.64 ±.05)
.025 ±.002
(.64 ±.05)
.025 ±.002
(.64 ±.05)
.025 ±.002
(.64 ±.05)
.032 ±.002
(.81 ±.05)
.025 ±.002
(.64 ±.05)
.025 ±.002
(.64 ±.05)
.040 ±.002
(1.02 ±.05)
.025 ±.002
(.64 ±.05)
.040 ±.002
(1.02 ±.05)
.025 ±.002
(.64 ±.05)
.040 ±.002
(1.02 ±.05)
.040 ±.002
(1.02 ±.05)
.040 ±.002
(1.02 ±.05)
Resistance Range
Tolerance
MG650
MG655
MG660
MG680
MG710
MG712
MG714
MG715
MG716
MG717
MG720
MG721
MG725
MG730
MG731
MG735
MG740
MG745
MG750
MG780
MG785
0.5
0.5
0.6
0.8
1.0
0.6
1.0
1.0
1.5
1.5
2.0
2.0
2.5
3.0
2.6
3.6
3.6
5.0
5.0
7.5
8.0
600
600
Type 1
Type 1
Type 1
Type 1
Type 1
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
Type 2
750
750
200
200
400
600
800
800
200
400
600
600
Ω
N/A
N/A
5 Meg
N/A
Standard
±1%, ±0.5%, ±0.25%, ±0.1%
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
8 Meg
10 Meg
20 Meg
50 Meg
20 Meg
20 Meg
50 Meg
75 Meg
75 Meg
150 Meg
100 Meg
200 Meg
250 Meg
150 Meg
N/A
N/A
St'd with "-15" rating
Extended Range
±1%
±1%
.500 ±.030
1,000
2,000
4,000
1,000
1,000
2,000
4,000
2,000
6,000
4,000
10,000
6,000
4,000
10,000
6,000
15,000
10,000
15,000
20,000
25,000
30,000
750
N/A
(12.70 ±.76)
.750 ±.030
750
N/A
N/A
(19.05 ±.76)
Temperature Coefficient:
1.000 ±.040
750
N/A
N/A
Resistance
Range
(25.40 ±1.02)
TC Specifications
.400 ±.060
750
N/A
N/A
(10.16 ±.152)
Standard and
St'd with "-15"
rating
±80 ppm/°C from -15°C to +105°C,
referenced to +25°C.
.562 ±.060
750
6.5 Meg
26 Meg
70 Meg
17 Meg
N/A
N/A
(14.27 ±1.52)
.750 ±.060
750
N/A
±80 ppm/°C from +25°C to +105°C,
-200 ppm/°C to +50 ppm/°C from
-15°C to +25°C.
(19.05 ±1.52)
Extended
Range
1.000 ±.060
750
N/A
(25.40 ±1.52)
.710 ±.050
Insulation Resistance: 10,000 Megohms, min.
750
225 M
N/A
(18.03 ±1.27)
Overload/Overvoltage: 5 times rated power
with applied voltage not to exceed 1.5 times max-
imum continuous operating voltage for 5 seconds.
Type 1: DC Voltage
1.500 ±.080
750
1 K
(38.10 ±2.03)
1.000 ±.050
750
200
Ω
51 Meg
N/A
300 M
N/A
(25.40 ±1.27)
2.000 ±.080
750
1.5 K
Type 2: DC Voltage or VrmsAC
(50.80 ±2.03)
1.500 ±.080
Resistance Range
Standard
Overload/Overvoltage, ∆R
0.5% max.
1,000
1,000
1,000
1,000
1,000
1,000
1,000
1,000
1,000
1,000
500
200
750
300
Ω
Ω
Ω
Ω
77 Meg
40 Meg
178 Meg
64 Meg
750 M
750 M
(38.10 ±2.03)
1.000
(25.40
±
±
.060
1.52)
St'd with "-15" rating
Extended Range
N/A
2.000 ±.080
300 Meg 1,000 M
300 Meg 1,500 M
500 Meg 1,500 M
500 Meg 2,500 M
750 Meg 3,750 M
(50.80 ±2.03)
0.8% max.
.315 ±.030
(8.00 ±.76)
.240 ±.030
(6.10 ±.76)
.315 ±.030
(8.00 ±.76)
.315 ±.030
(8.00 ±.76)
.315 ±.030
(8.00 ±.76)
.315 ±.030
(8.00 ±.76)
1.500 ±.060
.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)
Thermal Shock: Mil-Std-202, Method 107,
Cond. C, ΔR 0.25% max.
(38.10 ±1.52)
3.000 ±.100
1 K 288 Meg
(76.20 ±2.54)
Moisture Resistance: Mil-Std-202, Method 106,
ΔR 0.4% max.
2.125 ±.060
400
600
800
Ω
Ω
Ω
128 Meg
192 Meg
(53.98 ±1.52)
3.125 ±.060
Load Life: 1,000 hours at +125°C at rated
voltage, not to exceed rated power.
(79.38 ±1.52)
4.000 ±.120
320 Meg 1,000 Meg 5,000 M
(101.60 ±3.05)
Resistance Range
Standard
Load Life, ∆R
0.5% max.
0.8% max.
0.8% max.
5.000 ±.120
MG810 10.0
MG815 15.0
1 K 400 Meg 1,250 Meg 6,250 M
1 K 384 Meg 2,000 Meg 10,000 M
(127.00 ±3.05)
6.000 ±.120
.350 ±.040
.040 ±.002
St'd with "-15" rating
Extended Range
Solderable Leads
(152.40 ±3.05) (8.89 ±1.02) (1.02 ±.05)
Models with low inductance construction are in shaded areas.
Models with Caddock's Non-Inductive Resistance Pattern are in non-shaded areas.
Encapsulation: High Temperature Silicone Conformal.
Applications Engineering
Sales and Corporate Office
1717 Chicago Avenue
Riverside, California 92507-2364
Phone: (951) 788-1700
17271 North Umpqua Hwy.
Roseburg, Oregon 97470-9422
Phone: (541) 496-0700
Fax: (541) 496-0408
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_IL110.1004
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