IL115.0710

Sales and Corporate Office

1717 Chicago Avenue

Riverside, California 92507-2364

Phone: (951) 788-1700

Fax: (951) 369-1151

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

© 2010 Caddock Electronics, Inc.

ELECTRONICS, INC.

Type TK Low TC Precision Radial-Lead Resistors with

the Tetrinox® resistance system solve the reliability problems

related to other low TC precision resistor technologies. The

robust construction of Caddock's Type TK Resistors provides

reliable operation even in harsh temperature cycling and/or

power cycling environments.

Type TK Low TC Precision Radial-Lead Film Resistors

provide a combination of performance advantages never

before available in a resistive component:

10 ppm/°C, or 20 ppm/°C over the entire temperature range

from -55°C to +125°C!

±0.05% per 2,000 hours of operation.

from 1 K ohm to 10 Megohm.

standard, and tolerances of ±1%

and ±0.05% are available.

Range - from -55°C to +175°C.

rectangular cases for maximum

packaging density and minimum

mounting area.

ratings of 0.2 Watt and 0.3 Watt in

molded cases, the largest of

which is a standard CK06 package.

settling times and minimum distortion in all types of high

frequency circuits.

small rectangular case of the Type TK resistors permit high

packaging densities in low profile circuitry. Because the

four models of the Type TK resistors are available in an

exceptionally wide range of resistance values, lead spacing

and mounting space can be standardized in a larger

number of designs.

Low TC of 5 ppm/°C, 10 ppm/°C, or 20 ppm/°C and Resistance Range from 1 Kohm to 10 Meg

Type TK Low TC Precision Radial-Lead Film Resistors

(Photos show

resistors full size)

Page 1 of 2

The Tetrinox® Resistance System was introduced

by Caddock in 1975. Tetrinox provides a wide range of

resistivities, with the higher resistivities capable of producing

resistance values up to 100 times higher than other ultra-low

TC resistors in a similar size component. The essentially

linear TC is well within 10 ppm/°C over the entire temperature

range from -55°C to +125°C. By using

TK resistors engineers can design high precision circuits with

lower current drain and lower power requirements.

Through our R&D, Caddock has continued to improve

the Tetrinox Resistance System, building on over 40 years of

experience with our unique complex oxide resistance system

technologies.

Low TC “Matched-Pair” Voltage Dividers can be

Assembled Without Pre-Selection of Resistors.

An important application for Type TK resistors is in

“matched-pair” voltage dividers where the low 5 ppm/°C

temperature coefficient provides ratio tracking of less than 10

ppm/°C without resistor pre-selection or special testing. With

factory selection, Type TK resistor pairs can be matched to

within 1 ppm/°C.

For Military Applications, Caddock recommends the

“Pure Tin Free” design of Models TK134 and TK634, that

have Gold Plated lead finish.

Please see the “TK134 and TK634” data sheet.

Recommended Limitation of Use:

The Type TK resistors that are shown on this data sheet have

pure matte tin (Sn) lead finish which is a preferred lead finish

in commercial and industrial applications. These resistors are

recommended by Caddock for use only in commercial and

industrial applications. Any use of this product in a military

program, against this recommended limitation of use, will be

completely supported by the customer program design activity

and component engineering activity based on their complete

evaluation and testing, there will be no support provided by

Caddock for this military use.

Background regarding the “Recommended Limitation of

Use” for these Type TK resistors:

Presently, military applications either prohibit the use of a

matte tin lead finish or are trending toward this prohibition.

Therefore, Caddock no longer recommends and no longer

supports, in any way, the Type TK Resistors that are shown

on this data sheet for use in military applications.