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1717 Chicago Avenue
Riverside, California 92507-2364
Phone: (951) 788-1700
Fax: (951) 369-1151
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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
© 2010 Caddock Electronics, Inc.
ELECTRONICS, INC.
28_IL113.0610
RATED POWER OR
RATED VOLTAGE, %
100
80
60
40
20
0
AMBIENT TEMPERATURE,
°
C
25
70
175
Type MX Precision High Voltage Resistors
1.500
±
.125
(38.10
±
3.18)
A
B
C
The performance features of the Type MX Precision High
Voltage Resistors are:
• Five Models with Voltage Ratings from 7.5 KV to 32 KV.
• Temperature Coefficient: 80 ppm/°C from 0°C to +70°C.
• Load Life Stability of 0.50% per 1,000 hours.
• Resistance Tolerance: 1% Standard.
• Non-Inductive Design.
• Resistance Range from 1 Megohm to 1,000 Megohms.
Specifications:
.
Temperature Coefficient: 80 ppm/°C referenced to
+25°C,
∆
R taken at 0°C and +70°C.
Thermal Shock: Mil-Std-202, Method 107,
Cond. A,
∆
R, 0.20% max.
Moisture Resistance: Mil-Std-202, Method 106,
∆
R, 1.0% max.
Load Life: 1,000 hours at rated voltage at +70°C,
not to exceed rated power,
∆
R, 0.50% max.
Lead Material: Tinned copper clad steel,
solderable.
Encapsulation: Screen printed high temperature
silicone coating over resistor element.
Max.
Continuous
Oper. Volt.
Watt-
age
Model
No.
A
B
C
Dimensions in inches and (millimeters)
Resistance
Min.
Max.
MX431
.940
±
.040
(23.88
±
1.02)
.270
±
.020
(6.86
±
.51)
.040
±
.002
(1.02
±
.05)
MX440
1.450
±
.040
(36.83
±
1.02)
.270
±
.020
(6.86
±
.51)
.040
±
.002
(1.02
±
.05)
MX450
2.080
±
.040
(52.83
±
1.02)
.270
±
.020
(6.86
±
.51)
.040
±
.002
(1.02
±
.05)
MX480
3.080
±
.050
(78.23
±
1.27)
.270
±
.020
(6.86
±
.51)
.040
±
.002
(1.02
±
.05)
MX485
3.940
±
.050
(100.08
±
1.27)
.270
±
.020
(6.86
±
.51)
.040
±
.002
(1.02
±
.05)
2.0
3.5
5.0
7.5
10.0
7,500
11,000
16,000
24,000
32,000
80
80
80
80
80
1 Meg
1.5 Meg
2 Meg
3 Meg
4 Meg
150 Meg
300 Meg
500 Meg
750 Meg
1,000 Meg
TC
ppm/
°
C
The Type MX Precision High Voltage Resistors were
specifically developed for use in industrial and general purpose
high voltage systems. These resistors combine the proven
performance of Caddock's Micronox® resistance system
with new cost efficient design elements. These resistors
are intended for the design of high voltage systems where
the system is not exposed to full military or space grade
operating conditions. For full military or space grade operating
conditions, we recommend Caddock's Type TG Low TC
Precision High Voltage Resistors or Type MG Precision
High Voltage Resistors.
Cost Effective High Voltage Resistors for Industrial and General Purpose Applications
Type MX Resistors Utilize Caddock's Patented Coating Design
Derating Curve:
DIMENSIONS IN INCHES AND (MILLIMETERS)
MX431
MX450
MX480
MX485
MX440
MX485 -100M - 1%
Model Number:
Resistor Value:
Tolerance
Ordering Information:
Standard Resistance Values:
1.00 Meg
2.00 Meg
2.50 Meg
5.00 Meg
10.0 Meg
20.0 Meg
25.0 Meg
50.0 Meg
100 Meg
200 Meg
250 Meg
500 Meg
Non-standard (custom) resistance values are
available. Please contact Caddock Applications
Engineering.
Type MX Precision High Voltage
Resistors combine Caddock’s
Non-Inductive serpentine pattern
with a patented, high thru-put
screen printed silicone coating.
The alignment of the gap in the
coating pattern with the gap
in the serpentine resistor pattern
provides a complete encapsulation
of the resistor element. The cap
and lead assemblies are pressed
onto the resistor core, finishing
the resistor and providing rugged
terminal attachment.
1% tolerance standard
1000 Meg