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© 2004 Caddock Electronics, Inc.
CAD KDOC
Type MX Precision High Voltage Resistors
1.500 ± .125
(38.10 ± 3.18)
AB
C
The performance features of the Type MX Precision High
Voltage Resistors are:
• Seven Models with Voltage Ratings from 7.5 KV to 48 KV.
• Temperature Coefficient: 80 ppm/°C from 0°C to +70°C.
• Load Life Stability of 0.50% per 1,000 hours.
• Resistance Tolerance from ±0.1% to ±10%.
• Non-Inductive Design.
• Resistance Range from 1 Megohm to 2,000 Megohms.
Specifications:
Resistance Tolerance: ±1%, ±2%, ±5%, or ±10%
(tolerance to ±0.5%, ±0.25%, or ±0.1% on special
order).
Temperature Coefficient: 80 ppm/°C referenced
to +25°C, ΔR taken at 0°C and +70°C.
Thermal Shock: Mil-Std-202, Method 107,
Cond. A, ΔR, 0.20% max.
Moisture Resistance: Mil-Std-202, Method 106,
ΔR, 1.0% max.
Load Life: 1,000 hours at rated voltage at +70°C,
not to exceed rated power, ΔR, 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)
MX510
4.940 ±.080
(125.48 ±2.03)
.270 ±.020
(6.86 ±.51)
.040 ±.002
(1.02 ±.05)
MX515
5.940 ±.080
(150.88 ±2.03)
.330 ±.020
(8.38 ±.51)
.040 ±.002
(1.02 ±.05)
2.0
3.5
5.0
7.5
10.0
12.5
15.0
7,500
11,000
16,000
24,000
32,000
40,000
48,000
80
80
80
80
80
80
80
1 Meg
1.5 Meg
2 Meg
3 Meg
4 Meg
5 Meg
6 Meg
150 Meg
300 Meg
500 Meg
750 Meg
1,000 Meg
1,250 Meg
2,000 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
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.
Derating Curve:
DIMENSIONS IN INCHES AND (MILLIMETERS)
MX431
MX450
MX515
MX 480
MX510
MX485
MX440
RATED POWER OR
RATED VOLTAGE, %
100
80
60
40
20
0
AMBIENT TEMPERATURE, °C
25 70
175
MX485 -100M - 1%
Model Number:
Resistor Value:
Tolerance
Ordering Information:
Certain products shown in this catalog are covered by one or more patents, there are also patents pending.
28_IL113.1004
