Type MG Precision High Voltage Resistors
Page 1 of 2
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.
Model
No.
Max.
Watt- Continuous
Overload
Dielect.
age Oper. Volt.
Rating
Strength
Resistance
Min.
Now with Extended Resistance Range to 10,000 Megohms and Additional Models
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.
A
B
C
-15
Min.
Standard
Max.
Extended
Max.
Dimensions in inches and (millimeters)
Specifications:
Resistance Range
MG650
MG655
0.5
0.5
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
Ω
200
Ω
N/A
N/A
5 Meg
8 Meg
N/A
N/A
MG660
MG680
MG710
0.6
0.8
1.0
1,000
2,000
4,000
750
750
750
400
Ω
600
Ω
800
Ω
N/A
N/A
N/A
10 Meg
20 Meg
50 Meg
N/A
N/A
N/A
MG712
MG714
0.6
1.0
1,000
1,000
750
750
800
Ω
200
Ω
N/A
6.5 Meg
26 Meg
70 Meg
17 Meg
20 Meg
20 Meg
N/A
N/A
MG715
MG716
MG717
1.0
1.5
1.5
2,000
4,000
2,000
750
750
750
400
Ω
600
Ω
600
Ω
50 Meg
75 Meg
75 Meg
N/A
N/A
225 M
MG720
MG721
2.0
2.0
6,000
4,000
750
750
1K
200
Ω
N/A
51 Meg
150 Meg
100 Meg
N/A
300 M
MG725
MG730
MG731
2.5
3.0
2.6
10,000
6,000
4,000
750
1,000
1,000
1.5 K
500
Ω
200
Ω
N/A
77 Meg
200 Meg
250 Meg
150 Meg
N/A
750 M
750 M
40 Meg
MG735
MG740
3.6
3.6
10,000
6,000
1,000
1,000
750
Ω
178 Meg
300
Ω
300 Meg
300 Meg
1,000 M
1,500 M
64 Meg
288 Meg
MG745
MG750
MG780
5.0
5.0
7.5
15,000
10,000
15,000
1,000
1,000
1,000
1K
500 Meg
500 Meg
750 Meg
1,500 M
2,500 M
3,750 M
400
Ω
128 Meg
600
Ω
192 Meg
MG785
MG810
8.0
10.0
20,000
25,000
1,000
1,000
800
Ω
320 Meg
1,000 Meg
1K
5,000 M
6,250 M
400 Meg
1,250 Meg
1.000
±.040
.094
±.015
.025
±.002
(25.40
±1.02)
(2.39
±.38)
(.64
±.05)
.140
±.030
.025
±.002
.400
±.060
(.64
±.05)
(10.16
±.152)
(3.56
±.76)
.150
±.030
.032
±.002
.562
±.060
(.81
±.05)
(14.27
±1.52)
(3.81
±.76)
.140
±.030
.025
±.002
.750
±.060
(19.05
±1.52)
(3.56
±.76)
(.64
±.05)
.140
±.030
.025
±.002
1.000
±.060
(.64
±.05)
(25.40
±1.52)
(3.56
±.76)
.240
±.030
.040
±.002
.710
±.050
(18.03
±1.27)
(6.10
±.76)
(1.02
±.05)
.140
±.030
.025
±.002
1.500
±.080
(.64
±.05)
(38.10
±2.03)
(3.56
±.76)
.240
±.030
.040
±.002
1.000
±.050
(25.40
±1.27)
(6.10
±.76)
(1.02
±.05)
.140
±.030
.025
±.002
2.000
±.080
(.64
±.05)
(50.80
±2.03)
(3.56
±.76)
.240
±.030
.040
±.002
1.500
±.080
(38.10
±2.03)
(6.10
±.76)
(1.02
±.05)
1.000
±.060
.315
±.030
.040
±.002
(25.40
±1.52)
(8.00
±.76)
(1.02
±.05)
.240
±.030
.040
±.002
2.000
±.080
(50.80
±2.03)
(6.10
±.76)
(1.02
±.05)
.315
±.030
.040
±.002
1.500
±.060
(38.10
±1.52)
(8.00
±.76)
(1.02
±.05)
.240
±.030
.040
±.002
3.000
±.100
(76.20
±2.54)
(6.10
±.76)
(1.02
±.05)
.315
±.030
.040
±.002
2.125
±.060
(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)
.315
±.030
.040
±.002
4.000
±.120
(101.60
±3.05)
(8.00
±.76)
(1.02
±.05)
.315
±.030
.040
±.002
5.000
±.120
(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)
.313
±.020
.094
±.015
(7.95
±.51)
(2.39
±.38)
.313
±.030
.109
±.025
(7.95
±.76)
(2.77
±.64)
.500
±.030
.094
±.015
(12.70
±.76)
(2.39
±.38)
.750
±.030
.094
±.015
(19.05
±.76)
(2.39
±.38)
Resistance Tolerance:
Tolerance
.025
±.002
(.64
±.05)
.025
±.002
(.64
±.05)
.025
±.002
(.64
±.05)
.025
±.002
(.64
±.05)
Standard
St'd with "-15" rating
Extended Range
±1%, ±0.5%, ±0.25%, ±0.1%
±1%
±1%
Temperature Coefficient:
Resistance
Range
TC Specifications
±80
ppm/°C from -15°C to +105°C,
referenced to +25°C.
±80
ppm/°C from +25°C to +105°C,
-200 ppm/°C to +50 ppm/°C from
-15°C to +25°C.
Standard and
St'd with "-15"
rating
Extended
Range
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 V
rms
AC
Resistance Range
Standard
St'd with "-15" rating
Extended Range
Overload/Overvoltage,
∆R
0.5% max.
N/A
0.8% max.
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.
Resistance Range
Standard
St'd with "-15" rating
Extended Range
Load Life,
∆R
0.5% max.
0.8% max.
0.8% max.
MG815
15.0
30,000
1,000
1K
384 Meg
2,000 Meg 10,000 M
Models with low inductance construction are in shaded areas.
Models with Caddock's Non-Inductive Resistance Pattern are in non-shaded areas.
Applications Engineering
17271 North Umpqua Hwy.
Roseburg, Oregon 97470-9422
Phone: (541) 496-0700
Fax: (541) 496-0408
© 2004 Caddock Electronics, Inc.
CADDOCK
Solderable Leads
Encapsulation:
High Temperature Silicone Conformal.
Sales and Corporate Office
1717 Chicago Avenue
Riverside, California 92507-2364
Phone: (951) 788-1700
Fax: (951) 369-1151
28_IL110.1004
e-mail: caddock@caddock.com • web: www.caddock.com
For Caddock Distributors listed by country see caddock.com/contact/dist.html
Type MG Precision High Voltage Resistors
Page 2 of 2
MG650
MG 655
MG660
MG680
MG710
MG712
MG714
MG715
MG716
MG720
MG725
MG717
MG721
MG730
MG735
MG745
N
Non-inductive
performance with
Caddock's exclusive design
Most models are available with
Caddock's Non-inductive Serpentine Pattern
MG731
MG740
MG750
MG780
MG785
MG810
MG815
Certain products shown in this catalog are covered by one or more patents, there are also patents pending.
1.500
±
.125
(38.10
±
3.18)
A
B
C
Design Assistance in Developing High Voltage Resistor Sets with
Low TC Tracking.
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.
DIMENSIONS IN INCHES AND (MILLIMETERS)
Derating Curve:
100
80
RATED POWER OR
60
RATED VOLTAGE, %
40
Ordering Information
:
Model Number:
25
75
125 175 225 275
AMBIENT TEMPERATURE,
°C
20
0
MG750 -100M - 1%
Tolerance
Resistor Value:
Sales and Corporate Office
1717 Chicago Avenue
Riverside, California 92507-2364
Phone: (951) 788-1700
Fax: (951) 369-1151
28_IL110.1004
Applications Engineering
17271 North Umpqua Hwy.
Roseburg, Oregon 97470-9422
Phone: (541) 496-0700
Fax: (541) 496-0408
© 2004 Caddock Electronics, Inc.
CADDOCK
e-mail: caddock@caddock.com • web: www.caddock.com
For Caddock Distributors listed by country see caddock.com/contact/dist.html
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