Sales and Corporate Office
1717 Chicago Avenue
Riverside, California 92507-2364
Phone: (951) 788-1700
Fax: (951) 369-1151
Applications Engineering
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
© 2004 Caddock Electronics, Inc.
CAD KDOC
Type MG Precision High Voltage Resistors
Specifications:
Resistance Tolerance:
Resistance Range
Tolerance
±1%
±1%, ±0.5%, ±0.25%, ±0.1%
Standard
St'd with "-15" rating
Extended Range
±1%
Resistance Range
Overload/Overvoltage, ∆R
N/A
0.5% max.
Standard
St'd with "-15" rating
Extended Range
0.8% max.
Models with low inductance construction are in shaded areas.
Models with Caddock's Non-Inductive Resistance Pattern are in non-shaded areas.
Standard and
St'd with "-15"
rating
±80 ppm/°C from +25°C to +105°C,
-200 ppm/°C to +50 ppm/°C from
-15°C to +25°C.
Resistance
Range
±80 ppm/°C from -15°C to +105°C,
referenced to +25°C.
TC Specifications
Extended
Range
Resistance Range
Load Life, ∆R
0.8% max.
0.5% max.
Standard
St'd with "-15" rating
Extended Range
0.8% max.
Dielect.
Strength
Max.
Continuous
Oper. Volt.
Watt-
age
Model
No. A B C
Dimensions in inches and (millimeters)
Resistance
Standard
Max.
Extended
Max.
Min.
MG650 .313 ±.020
(7.95 ±.51)
.094 ±.015
(2.39 ±.38) .025 ±.002
(.64 ±.05)
MG655
.313 ±.030
(7.95 ±.76)
.109 ±.025
(2.77 ±.64) .025 ±.002
(.64 ±.05)
MG660
.500 ±.030
(12.70 ±.76)
.094 ±.015
(2.39 ±.38) .025 ±.002
(.64 ±.05)
MG680
.750 ±.030
(19.05 ±.76)
.094 ±.015
(2.39 ±.38) .025 ±.002
(.64 ±.05)
MG710
1.000 ±.040
(25.40 ±1.02)
.094 ±.015
(2.39 ±.38) .025 ±.002
(.64 ±.05)
MG712 .400 ±.060
(10.16 ±.152)
.140 ±.030
(3.56 ±.76) .025 ±.002
(.64 ±.05)
MG714
.562 ±.060
(14.27 ±1.52)
.150 ±.030
(3.81 ±.76) .032 ±.002
(.81 ±.05)
MG715
.750 ±.060
(19.05 ±1.52)
.140 ±.030
(3.56 ±.76) .025 ±.002
(.64 ±.05)
MG716
1.000 ±.060
(25.40 ±1.52)
.140 ±.030
(3.56 ±.76) .025 ±.002
(.64 ±.05)
MG717
.710 ±.050
(18.03 ±1.27)
.240 ±.030
(6.10 ±.76) .040 ±.002
(1.02 ±.05)
MG720
1.500 ±.080
(38.10 ±2.03)
.140 ±.030
(3.56 ±.76) .025 ±.002
(.64 ±.05)
MG721
1.000 ±.050
(25.40 ±1.27)
.240 ±.030
(6.10 ±.76) .040 ±.002
(1.02 ±.05)
MG725
2.000 ±.080
(50.80 ±2.03)
.140 ±.030
(3.56 ±.76) .025 ±.002
(.64 ±.05)
MG730
1.500 ±.080
(38.10 ±2.03)
.240 ±.030
(6.10 ±.76) .040 ±.002
(1.02 ±.05)
MG731
1.000
±
.060
(25.40
±
1.52)
.315 ±.030
(8.00 ±.76) .040 ±.002
(1.02 ±.05)
MG735
2.000 ±.080
(50.80 ±2.03)
.240 ±.030
(6.10 ±.76) .040 ±.002
(1.02 ±.05)
MG740
1.500 ±.060
(38.10 ±1.52)
.315 ±.030
(8.00 ±.76) .040 ±.002
(1.02 ±.05)
MG745
3.000 ±.100
(76.20 ±2.54)
.240 ±.030
(6.10 ±.76) .040 ±.002
(1.02 ±.05)
MG750
2.125 ±.060
(53.98 ±1.52)
.315 ±.030
(8.00 ±.76) .040 ±.002
(1.02 ±.05)
MG780
3.125 ±.060
(79.38 ±1.52)
.315 ±.030
(8.00 ±.76) .040 ±.002
(1.02 ±.05)
MG785
4.000 ±.120
(101.60 ±3.05)
.315 ±.030
(8.00 ±.76) .040 ±.002
(1.02 ±.05)
MG810
5.000 ±.120
(127.00 ±3.05)
.315 ±.030
(8.00 ±.76) .040 ±.002
(1.02 ±.05)
MG815
6.000 ±.120
(152.40 ±3.05)
.350 ±.040
(8.89 ±1.02)
.040 ±.002
(1.02 ±.05)
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
10.0
15.0
600
600
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
750
750
750
750
750
750
750
750
750
750
750
750
1,000
1,000
1,000
1,000
1,000
1,000
1,000
1,000
1,000
1,000
200 Ω
200
Ω
400 Ω
600 Ω
800
Ω
800 Ω
200
Ω
400 Ω
600 Ω
600
Ω
1 K
200
Ω
1.5 K
500 Ω
200
Ω
750 Ω
300
Ω
1 K
400 Ω
600
Ω
800 Ω
1 K
1 K
5 Meg
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
300 Meg
300 Meg
500 Meg
500 Meg
750 Meg
1,000 Meg
1,250 Meg
2,000 Meg
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
225 M
N/A
300 M
N/A
750 M
750 M
1,000 M
1,500 M
1,500 M
2,500 M
3,750 M
5,000 M
6,250 M
10,000 M
-15
Min.
6.5 Meg
N/A
N/A
N/A
N/A
N/A
N/A
26 Meg
70 Meg
17 Meg
N/A
51 Meg
N/A
77 Meg
40 Meg
178 Meg
64 Meg
288 Meg
128 Meg
192 Meg
320 Meg
400 Meg
384 Meg
Overload
Rating
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
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:
• 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.
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."
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.
Insulation Resistance: 10,000 Megohms, min.
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
Type 2: DC Voltage or VrmsAC
Thermal Shock: Mil-Std-202, Method 107,
Cond. C, ΔR 0.25% max.
Moisture Resistance: Mil-Std-202, Method 106,
ΔR 0.4% max.
Load Life: 1,000 hours at +125°C at rated
voltage, not to exceed rated power.
Solderable Leads
Encapsulation: High Temperature Silicone Conformal.
Temperature Coefficient:
Page 1 of 2
28_IL110.1004
Sales and Cor po rate Offi ce
1717 Chicago Av e nue
Riverside, California 92507-2364
Phone: (951) 788-1700
Fax: (951) 369-1151
Applications Engineering
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
© 2004 Caddock Electronics, Inc.
CAD KDOC
C
B
A
1.500 ± .125
(38.10 ± 3.18)
RATED POWER OR
RATED VOLTAGE, %
AMBIENT TEMPERATURE, °C
100
80
60
40
20
0
25 75
125 175 225 275
MG680
MG712
MG714
MG715
MG725
MG720
MG660
MG716
MG721
MG745
MG810
MG815
MG735
MG730
MG717
MG785
MG731
MG740
Most models are available with
Caddock's Non-inductive Serpentine Pattern
For immediate engineering assistance in developing Low Ratio TC matched
high voltage resistor sets, contact our Applications Engineering and we will
be pleased to offer the best solution from our high voltage resistor product
capabilities.
Derating Curve:
MG650
MG710
MG750
MG780
DIMENSIONS IN INCHES AND (MILLIMETERS)
Design Assistance in Developing High Voltage Resistor Sets with
Low TC Tracking.
Ordering Information:
MG750 -100M - 1%
Model Number:
Resistor Value:
Tolerance
Certain products shown in this catalog are covered by one or more patents, there are also patents pending.
MG655
N
Non-inductive
performance with
Caddock's exclusive design
Type MG Precision High Voltage Resistors
Page 2 of 2
28_IL110.1004
