TK121 Datasheet, PDF (1/2 Pages) List of Unclassifed Manufacturers – Low TC Precision Radial-Lead Film Resistors

Type TK Low TC Precision Radial-Lead Film Resistors
Page 1 of 2
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 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:
• Low Temperature Coefficient - better than 5 ppm/°C,
10 ppm/°C, or 20 ppm/°C over the entire temperature range
from -55°C to +125°C!
• Long-Term Absolute Stability - typically better than
±0.05% per 2,000 hours of operation.
• Extended Resistance Range -
from 1 K ohm to 10 Megohm.
• Precision Tolerances - ±0.1% is
standard, and tolerances of ±1%
and ±0.05% are available.
• Wide Operating Temperature
Range - from -55°C to +175°C.
• Small Size - with four miniature
rectangular cases for maximum
packaging density and minimum
mounting area.
• High Power Density - with power
ratings of 0.2 Watt and 0.3 Watt in
molded cases, the largest of
which is a standard CK06 package.
(Photos show
resistors full size)
• Caddock's Non-Inductive Performance - provides faster
settling times and minimum distortion in all types of high
frequency circuits.
• High Density Packaging - the radial-lead mounting and
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.
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.
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.
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.
Applications Engineering
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Roseburg, Oregon 97470-9422
Phone: [phone]
Fax: [phone]
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ELECTRONICS, INC.
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