Type MG Precision High Voltage Resistors
Page 1 of 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.
Preconditioning for Power and Voltage Ratings
All power ratings and maximum operating voltage ratings
are for continuous duty. These ratings are based on prestress 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.
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.
MG650
Max.
Watt- Continuous Overload Dielect.
age Oper. Volt. Rating Strength
0.5
600
Type 1
750
Resistance
Min.
200 Ω
-15
Min.
Standard
Max.
N/A
5 Meg
0.5
600
Type 1
750
200 Ω
N/A
8 Meg
N/A
MG660
0.6
1,000
Type 1
750
400 Ω
N/A
10 Meg
N/A
MG680
0.8
2,000
Type 1
750
600 Ω
N/A
20 Meg
N/A
MG710
1.0
4,000
Type 1
750
800 Ω
N/A
50 Meg
N/A
MG712
0.6
1,000
Type 2
750
800 Ω
N/A
20 Meg
N/A
MG714
1.0
1,000
Type 2
750
200 Ω
6.5 Meg
20 Meg
N/A
MG715
1.0
2,000
Type 2
750
400 Ω
26 Meg
50 Meg
N/A
MG716
1.5
4,000
Type 2
750
600 Ω
70 Meg
75 Meg
N/A
MG717
1.5
2,000
Type 2
750
600 Ω
17 Meg
75 Meg
225 M
MG720
2.0
6,000
Type 2
750
1K
150 Meg
N/A
MG721
2.0
4,000
Type 2
750
200 Ω
100 Meg
300 M
MG725
2.5
10,000
Type 2
750
1.5 K
200 Meg
N/A
MG730
3.0
6,000
Type 2
1,000
500 Ω
250 Meg
750 M
51 Meg
N/A
77 Meg
A
MG731
2.6
4,000
Type 2
1,000
200 Ω
40 Meg
150 Meg
750 M
MG735
3.6
10,000
Type 2
1,000
750 Ω 178 Meg
300 Meg
1,000 M
MG740
3.6
6,000
Type 2
1,000
300 Ω
64 Meg
300 Meg
1,500 M
MG745
5.0
15,000
Type 2
1,000
1K
288 Meg
500 Meg
1,500 M
MG750
5.0
10,000
Type 2
1,000
400 Ω 128 Meg
500 Meg
2,500 M
MG780
7.5
15,000
Type 2
1,000
600 Ω 192 Meg
750 Meg
3,750 M
MG785
8.0
20,000
Type 2
1,000
800 Ω 320 Meg 1,000 Meg
5,000 M
MG810
10.0
25,000
Type 2
1,000
1K
400 Meg 1,250 Meg
6,250 M
MG815
15.0
30,000
Type 2
1,000
1K
384 Meg 2,000 Meg 10,000 M
1.000 ±.040 .094 ±.015
(25.40 ±1.02) (2.39 ±.38)
.140 ±.030
.400 ±.060
(10.16 ±.152) (3.56 ±.76)
.150 ±.030
.562 ±.060
(14.27 ±1.52) (3.81 ±.76)
.140 ±.030
.750 ±.060
(19.05 ±1.52) (3.56 ±.76)
.140 ±.030
1.000 ±.060
(25.40 ±1.52) (3.56 ±.76)
.240 ±.030
.710 ±.050
(18.03 ±1.27) (6.10 ±.76)
.140 ±.030
1.500 ±.080
(38.10 ±2.03) (3.56 ±.76)
.240 ±.030
1.000 ±.050
(25.40 ±1.27) (6.10 ±.76)
.140 ±.030
2.000 ±.080
(50.80 ±2.03) (3.56 ±.76)
.240 ±.030
1.500 ±.080
(38.10 ±2.03) (6.10 ±.76)
1.000 ±.060 .315 ±.030
(25.40 ±1.52) (8.00 ±.76)
.240 ±.030
2.000 ±.080
(50.80 ±2.03) (6.10 ±.76)
.315 ±.030
1.500 ±.060
(38.10 ±1.52) (8.00 ±.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)
.040 ±.002
(1.02 ±.05)
6.000 ±.120 .350 ±.040 .040 ±.002
(152.40 ±3.05) (8.89 ±1.02) (1.02 ±.05)
Models with Caddock's Non-Inductive Resistance Pattern are in non-shaded areas.
© 2004 Caddock Electronics, Inc.
C
.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)
.315
±.030 .040 ±.002
3.125 ±.060
(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)
Models with low inductance construction are in shaded areas.
Applications Engineering
17271 North Umpqua Hwy.
Roseburg, Oregon 97470-9422
Phone: (541) 496-0700
Fax: (541) 496-0408
B
.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)
N/A
MG655
N/A
Dimensions in inches and (millimeters)
Extended
Max.
CADDOCK
Specifications:
Resistance Tolerance:
Resistance Range
Tolerance
Standard
±1%, ±0.5%, ±0.25%, ±0.1%
St'd with "-15" rating
±1%
Extended Range
±1%
Temperature Coefficient:
Resistance
Range
TC Specifications
Standard and
St'd with "-15"
rating
±80 ppm/°C from -15°C to +105°C,
referenced to +25°C.
Extended
Range
±80 ppm/°C from +25°C to +105°C,
-200 ppm/°C to +50 ppm/°C from
-15°C to +25°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.
Type 1: DC Voltage
Type 2: DC Voltage or VrmsAC
Resistance Range
Overload/Overvoltage, ∆R
Standard
0.5% max.
St'd with "-15" rating
N/A
Extended Range
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
Load Life, ∆R
Standard
0.5% max.
St'd with "-15" rating
0.8% max.
Extended Range
0.8% max.
Solderable Leads
Encapsulation: High Temperature Silicone Conformal.
e-mail: [email protected] • web: www.caddock.com
For Caddock Distributors listed by country see caddock.com/contact/dist.html
Sales and Corporate Office
1717 Chicago Avenue
Riverside, California 92507-2364
Phone: (951) 788-1700
Fax: (951) 369-1151
28_IL110.1004
Type MG Precision High Voltage Resistors
Page 2 of 2
MG650
MG655
MG660
MG680
MG710
MG712
MG714
MG715
MG716
N
MG720
MG725
MG717
Non-inductive
performance with
Caddock's exclusive design
Most models are available with
Caddock's Non-inductive Serpentine Pattern
MG721
MG730
MG735
MG745
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)
B
A
C
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:
Design Assistance in Developing High Voltage Resistor Sets with
Low TC Tracking.
100
80
Ordering Information:
RATED POWER OR 60
RATED VOLTAGE, % 40
Model Number:
20
0
25
75
125 175 225 275
AMBIENT TEMPERATURE, °C
Applications Engineering
17271 North Umpqua Hwy.
Roseburg, Oregon 97470-9422
Phone: (541) 496-0700
Fax: (541) 496-0408
© 2004 Caddock Electronics, Inc.
CADDOCK
MG750 -100M - 1%
Tolerance
Resistor Value:
e-mail: [email protected] • web: www.caddock.com
For Caddock Distributors listed by country see caddock.com/contact/dist.html
Sales and Corporate Office
1717 Chicago Avenue
Riverside, California 92507-2364
Phone: (951) 788-1700
Fax: (951) 369-1151
28_IL110.1004