28_IL113.0717

© 2003-2017 Caddock Electronics, Inc.

Sales and 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

ELECTRONICS, INC.

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.

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