Sales and Cor po rate Offi ce
1717 Chicago Av e nue
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
© 2004 Caddock Electronics, Inc.
CAD KDOC
Type MK Precision Power Film Radial-Lead Resistors
Comparison of Type MK and "RN" Ratings and Dimensions
Resistor
Type
Power
Rating
Maximum
Resistance
Mounting
Hole
Spacing
40 Megohms
0.50 W
MK120
or MK620
100 Megohms
0.75 W
MK132, MK132V,
MK632, or MK632V
Even the smallest Type MK
resistor can replace all of these
RN type resistors
1 Megohm
0.05 W
RN50
5 Megohms
0.10 W
RN55
10 Megohms
0.125 W
RN60
20 Megohms
0.25 W
RN65
40 Megohms
0.50 W
RN70
RN50
RN55
RN65
RN70
.150
(3.81)
.200
(5.08)
.400
(10.15)
.500
(12.70)
.625
(15.90)
.875
(22.20)
1.000
(25.40)
All outline drawings full size - dimensions in inches and (millimeters).
RN60
One standard resistor confi guration can simplify board
layouts.
With the exceptionally wide range of resistance values
that are available in each model of Type MK Precision Film
Resistors, circuits can now be
designed for maximum
packaging densities
without the need for
leaving extra space where
resistor value changes can
require larger resistors or non-
uniform lead spacings.
Standardization of resistor size can speed
assembly procedures and reduce procurement costs.
The standardization of resistor size can pay additional
dividends by simplifying assembly procedures. The radial
leads do not require additional bending prior to insertion, and
the standard lead spacing can reduce the time required for
assembly.
The combination of higher power ratings and smaller size
can also lower procurement costs. By reducing the wide
va ri ety of sizes and types of axial-lead resistors to a single,
standardized resistor type, unit prices can be lowered and
inventory problems simplifi ed. For specifi c price and delivery
information, contact our Sales Offi ce.
The largest Type MK - rated at .75 watt - requires less board
space than even the .05 watt RN50.
The smallest Type MK - rated at .50 watt - provides power
dis si pa tion equal to the RN70 resistor. The RN70 resistor requires a
mounting hole spacing of 1 inch and a side-to-side spacing of .25
inch, resulting in a total mounting area of .25 square inch - 10 times
the area required for a .50 Watt Type MK resistor!
Non-Inductive with Expanded Resistance Range — 1 ohm to 100 Megohms
Here are the precision radial lead resistors that provide
high density packaging in circuit board applications. Available
in three miniature rectangular package confi gurations with
standard lead spacings, Type MK Precision Power Ra di al-
Lead Film Resistors now cover the entire resistance range
from 1 ohm to 100 Megohms.
Constructed with Caddock's Micronox® resistance fi lms
fi red onto a solid ceramic substrate, Type MK Precision Film
Re sis tors combine all of these outstanding advantages:
• ±1% Resistance Tolerance is Standard - tolerances to
±0.1% are available on special order.
• Operating Temperature - from -55°C to +175°C.
• Full Power Rating at +125°C.
• Temperature Coeffi cient is ≤ 50 ppm/°C from
5 ohms to 5 Megohms and ≤ 80 ppm/°C up to
100 Megohms - referenced to +25°C with the ΔR taken
at -15°C and +105°C.
• Extended Life Stability is Typically Better Than 0.1%
per 1,000 Hours.
• Caddock's Non-Inductive Performance - provides faster
settling times and minimum distortion in all types of high
frequency circuits.
This combination of performance advantages in a small,
standardized case can simplify many engineering and
pro duc tion problems:
One size of Type MK resistor can replace many sizes of
axial-lead resistors.
This table of "RN" style axial-lead resistors shows the
many sizes and power ratings that can be replaced with one
of the three models of Type MK Precision Film Resistors,
within the maximum allowable voltage ratings.
Resistors, circuits can now be
resistor value changes can
require larger resistors or non-
Page 1 of 2
28_IL100.1004
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
© 2004 Caddock Electronics, Inc.
CAD KDOC
Temperature Coefficient:
Temperature Coefficient referenced to
+25°C, ΔR taken at -15°C and +105°C.
Insulation Resistance: 10,000 Megohms,
minimum.
Resistance Range
Temp. Coef.
200 ppm/°C
50 ppm/°C
Standard : 5 Ω and above
Low : 1 Ω to 4.99 Ω
Resistance Tolerance: ±1% (tolerances
to ±0.1% available on values of 30 ohms or
higher).
Overload/Overvoltage: 5 times rated
power with applied voltage not to
exceed 1.5 times maximum continuous
operating voltage for 5 seconds, ΔR ±(0.15
percent + 0.01 ohm) max.
Operating Temperature: -55°C to
+175°C.
Load Life: 1,000 hours at +125°C at rated
power, ΔR ±(0.4 percent +0.01 ohm)
max.
Thermal Shock: Mil-Std-202, Method 107,
Cond. B, ΔR ±(0.2 percent +0.01 ohm)
max.
Moisture Resistance: Mil-Std-202, Meth-
od 106, ΔR ±(0.5 percent + 0.01 ohm)
max.
Type MK Precision Film Resistors - Low and Standard Resistance Ranges
ALL DIMENSIONS IN INCHES AND (MILLIMETERS)
Resistance Tolerance: ±1% (consult
factory for tighter tolerances).
Overload/Overvoltage: 1.5 times max.
voltage for 5 seconds, ΔR 0.5% max.
Operating Temperature: -55°C to
+175°C.
Temperature Coefficient: See Table for
TC value. TC referenced to +25°C, ΔR
taken at -15°C and +105°C.
Insulation Resistance: 10,000 Megohms,
minimum.
Load Life: 1,000 hours at +125°C at rated
power, ΔR 0.5% max.
Thermal Shock: Mil-Std-202, Method 107,
Cond. B, ΔR 0.5% max.
Moisture Resistance: Mil-Std-202,
Method 106, ΔR 0.5% max.
Type MK Precision Film Resistors - Extended Resistance Range
Measurement Note: Resistance measurement on low resistance values shall be made at a point within 0.2 inch (5.08 mm) of the body.
Dimensions
Encapsulation
Leadwire
Ref. Case "A" Dwg.
Transfer Molded
Tinned Copper
Ref. Case "B" Dwg.
Model
No.
Watt-
age
Max.
Voltage
Oper.
Temp.
Max.
Dielect.
Strength
MK120
0.50
200
175°C
300
1 Ω
5 Ω
2 Meg
MK132
0.75
400
175°C
400
1 Ω
5 Ω
5 Meg
Resistance
Standard
Min.
Standard
Max.
Low
Min.
Transfer Molded
Tinned Copper
Ref. Case "C" Dwg.
MK132V
0.75
400
175°C
400
1 Ω
5 Ω
5 Meg
Transfer Molded
Tinned Copper With Standoff
Comments
Case "B"
Ordering Information:
MK132 - 500K - 1%
Model Number:
Resistor Value:
Tolerance
RATED LOAD, %
AMBIENT TEMPERATURE, °C
100
80
60
40
20
025 75 125 175 225
Derating Curve:
Model MK132 and MK632
1.50
+3.18)
-0.00)
+.125
-.000
(38.10
.290
±.010
(7.37
±.26)
.095 ±.005
(2.41 ±.13)
.290 ±.010
(7.37 ±.26)
.200 ±.015
(5.08 ±.38)
(CENTERED)
.025 ±.002
(.64 ±.05) DIA.,
LEADWIRE
OFFSET
.012 (.31)
FROM
CENTERLINE
100 MEG
MK632
1%
Model MK132V and MK632V
.250
±1.27)
±.050
(6.35
.290 ±.010
(7.37 ±.26)
.200 ±.015
(5.08 ±.38)
(CENTERED)
100 MEG
MK632V
1%
.090
(2.29)
.030 ±.004
(.76 ± .10)
.095 ±.005
(2.41 ±.13)
.290 ±.010
(7.37 ±.26)
.025 ±.002
(.64 ±.05) DIA.,
LEADWIRE
OFFSET
.012 (.31)
FROM
CENTERLINE
Model MK120 and MK620
1.50
+3.18)
-0.00)
+.125
-.000
.150 ±.015
(3.81 ±.38)
(CENTERED)
10.0
MK120
1%
.245
±.010
(6.22
±.26)
(38.10
.095 ±.005
(2.41 ±.13)
.245 ±.010
(6.22 ±.26)
.025 ±.002
(.64 ±.05) DIA.,
LEADWIRE
OFFSET
.012 (.31)
FROM
CENTERLINE
Case "A" Case "C"
Type MK Precision Power Film Radial-Lead Resistors
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28_IL100.1004