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Sales and Applications Engineering

17271 North Umpqua Hwy.

Roseburg, Oregon 97470-9422

Phone: (541) 496-0700

email: caddock@caddock.com

website: caddock.com

For Caddock Distributors listed by country see caddock.com/contact/dist.html

ELECTRONICS, INC.

28_IL108.0321

Power Film Resistor Family with Wide Resistance Range and +275°C Maximum Temperature

With power ratings to 22 Watts and voltage ratings as

high as 6,000 volts in an axial-lead resistor with values to

30 Megohms, the Type MS Power Film Resistors deliver

the performance capabilities that can simplify circuit

design and reduce equipment cost and complexity.

Type MS Power Film Resistors provide all these features in

a single resistor:

- for non-inductive performance.

- for high resistance values that extend the critical

resistance value up to 10 times.

wire size and spacing.

Tests demonstrate typical stability of 0.05% per 1,000

hours over extended life.

complex metal oxide resistance films. Produced exclusively

by Caddock Electronics, these proven complex oxide films

have been used reliably for over 30 years in Caddock's

precision power resistor products.

ceramic core at temperatures above 1400°F (760°C). These

resistance films have demonstrated outstanding stability

when exposed to a high ambient temperature, thermal shock

and high power densities.

This unique approach to precision power resistors opens

new design possibilities by providing a wider resistance

range, precise temperature characteristics, and higher

temperature and power handling capability.

The Serpentine Pattern used in this patented product

contain features which enhance high stability in

High-Power Resistor applications.

Most models are manufactured with Caddock's

Non-Inductive 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.

The result is a truly non-inductive resistor that is about as

inductive as a straight piece of wire the length of the resistor

body. This efficient design means faster settling times and

minimum distortion in all types of high frequency circuits.

Manufacturing Control

Type MS Resistors are produced under intensive

manufacturing controls with processes which include power

conditioning, overvoltage conditioning, and maximum

temperature conditioning.

Quality Control

From the certification and testing of all materials, to the

supervision of manufacturing processes, all Caddock Type

MS Power Film Resistors are produced under procedures

that have been approved for conformance to the

requirements of Mil-I-45208 in many recent surveys as

described on page 8.

Reliability Verification

Type MS resistors are included in the Caddock Reliability

Testing Program. Conformance to specification parameters

including Extended Life, Shock, Vibration, and Humidity are

verified on a periodic basis. Data from Type MS resistors

can be compared by similarity to other Caddock resistor

types, since Type ML, MM, MS, MP, MG, and MK represent

an identical combination of materials - aluminum oxide

coating.

Carefully Controlled Manufacturing and Test Procedures Assure Compliance with

Strict Quality Control Requirements.

Non-Inductive

Design

Type MS Power Film Resistors

Certain products shown in this catalog are covered by one or more patents,

there are also patents pending.

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