Type MK Precision Power Film Radial-Lead Resistors
Page 1 of 2
Type MK Precision Power Film Radial-Lead Resistors
provide high density packaging in circuit board applications.
These resistors are available in two compact rectangular
package configurations with standard lead spacings. Type
MK Precision Power Radial-Lead Film Resistors cover the
entire resistance range from 1 ohm to 100 Megohms, with a
standard tolerance of 1%.
Constructed with Caddock's Micronox
®
resistance films
fired onto a solid ceramic substrate, Type MK Precision Film
Resistors combine all of these outstanding advantages:
RoHS Compliant -- MK200 Series and MK700 Series Resistors
Non-Inductive with Expanded Resistance Range — 1 ohm to 100 Megohms
•
±1% Resistance Tolerance is Standard
- tolerances to
±0.1% are available on special order.
•
Operating Temperature
- from -40°C to +150°C.
•
Power Ratings at +85°C and at +125°C.
•
Temperature Coefficient is ≤ 50 ppm/°C from
•
Extended Life Stability is typically better than 0.1%
per 1,000 Hours.
5 ohms to 5 Megohms and ≤ 80 ppm/°C up to
100 Megohms
- referenced to +25°C with the
∆R
taken
at -15°C and +105°C.
settling times and minimum distortion in all types of higher
frequency circuits.
This combination of performance features in a compact
radial-lead resistor package can simplify engineering,
inventory, and production:
Selecting one compact radial-
lead resistor package can
simplify board layouts.
•
Caddock's Non-Inductive Performance
- provides faster
Using one compact radial-lead resistor package can
speed assembly procedures, simplify procurement, and
simplify inventory.
With the exceptionally wide
range of resistance values that
are available in each model of
Type MK Precision Power Film
Radial-Lead Resistors, circuits
can now be designed for greater
packaging densities without the need for leaving extra space
where resistor value changes can require larger resistors or
non-uniform lead spacings.
Recommended use:
The Type MK resistors that are shown on this data sheet
are recommended by Caddock for use in commercial and
industrial applications. These RoHS resistors have pure
matte tin (Sn) lead finish optimized for use in commercial and
industrial applications.
Presently, most military applications either prohibit the use of
a matte tin lead finish or are trending toward this prohibition.
Therefore, Caddock does not recommend and does not
support the Type MK Resistors that are shown on this data
sheet for use in military applications.
By reducing the wide variety of sizes and types of
axial-lead resistors to a single compact radial-lead resistor
package with advanced performance ratings, procurement
and inventory can be simplified. The radial leads do not
require additional bending prior to
insertion, and the standard lead
spacing can reduce the time
required for assembly. For specific
price and delivery information,
(Resistors shown full size)
contact our Sales Office.
Standard Part Number Includes:
Standard resistance value
(listed below), standard tolerance of 1%.
MK227
1.00 Ω
2.00 Ω
4.00 Ω
5.00 Ω
10.0 Ω
20.0 Ω
40.0 Ω
50.0 Ω
100 Ω
200 Ω
400 Ω
500 Ω
1.00 K
2.00 K
4.00 K
5.00 K
10.0 K
20.0 K
40.0 K
50.0 K
100 K
200 K
400 K
500 K
1.00 Meg
2.00 Meg
MK727
MK232
4.00
5.00
10.0
20.0
40.0
Meg
Meg
Meg
Meg
Meg
1.00 Ω
2.00 Ω
4.00 Ω
5.00 Ω
10.0 Ω
20.0 Ω
40.0 Ω
50.0 Ω
100 Ω
200 Ω
400 Ω
500 Ω
1.00 K
2.00
4.00
5.00
10.0
20.0
40.0
50.0
100
200
400
500
1.00
2.00
4.00
5.00
K
K
K
K
K
K
K
K
K
K
K
Meg
Meg
Meg
Meg
MK732
Meg
Meg
Meg
Meg
Meg
10.0
20.0
40.0
50.0
100
Any use of this product in a military program, against this
recommended limitation of use, must be completely supported
by the customer program design activity and component
engineering activity based on the complete evaluation and
testing by these activities, there will be no support provided
by Caddock for the military use. In this case, a military
customer drawing must clearly specify the lead material, lead
finish, and the military customer’s responsibility for use.
Non-Standard Part Number Includes:
Non-standard resistance value and/or non-standard tolerance.
Available in a minimum order quantity of 25 pcs.
Ordering Information:
Model Number
MK232 - 500K - 1%
Resistor Value
Tolerance
Type MK Precision Power Film Radial-Lead Resistors
Page 2 of 2
Type MK Precision Film Resistors - Low and Standard Resistance Ranges
Model
No.
Resistance
Low
Min.
1
Ω
1
Ω
Standard
Min.
5
Ω
5
Ω
Standard
Max.
2 Meg
5 Meg
Dimensions
Dieletric
Strength
+85°C Maximum Ratings
Max.
1000 hr
Max.
1000 hr
Wattage Working Load Stablity Wattage Working Load Stablity
Voltage ∆R less than
Voltage ∆R less than
±(0.20%
±(0.40%
200
0.20
200
0.50
+ 0.01 ohm)
+ 0.01 ohm)
±(0.20%
±(0.40%
400
0.30
400
0.75
+ 0.01 ohm)
+ 0.01 ohm)
+125°C Maximum Ratings
(see Derating Curve)
MK
227
MK
232
0.07%
Fig 1
0.07%
Fig 2
300
400
Resistance Tolerance:
±1% is standard.
(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 working
voltage for 5 seconds,
∆R
±(0.15 percent
+ 0.01 ohm) max.
Operating Temperature:
-40°C to +150°C.
Temperature Coefficient:
Resistance Range
Temp. Coef.
Thermal Shock:
MIL-STD-202, Method 107,
Cond. B, except low temperature is -40°C,
∆R
±(0.20 percent + 0.01 ohm) max.
Standard : 5
Ω
and above
Low : 1
Ω
to 4.99
Ω
50 ppm/°C
200 ppm/°C
Temperature Coefficient referenced to
+25°C,
∆R
taken at -15°C and +105°C.
Solderable Leads:
Matte Tin Plated Copper.
Moisture Resistance:
MIL-STD-202,
Method 106,
∆R
±(0.50 percent + 0.01 ohm)
max.
Insulation Resistance:
10,000 Megohms,
minimum.
Load Stability:
%∆R is shown in the table
for 1,000 hours at rated voltage not to ex-
ceed rated power.
Measurement Note:
Resistance measurement
on low resistance values shall be made at a
point within 0.2 inch (5.08 mm) of the body.
Type MK Precision Film Resistors - Extended Resistance Range
Model
No.
MK
727
MK
732
TC
ppm/°C
Resistance
Min.
2.01 Meg
5.01 Meg
Max.
40.0 Meg
100 Meg
Dieletric
Dimensions Strength
0.07%
Fig 1
Fig 2
0.07%
300
400
+85°C Maximum Ratings
Max.
1000 hr
Max.
1000 hr
Wattage Working Load Stability Wattage Working Load Stability
Voltage ∆R less than
Voltage ∆R less than
Limited
by Max.
Working
Voltage
200
400
0.20%
0.20%
Limited
by Max.
Working
Voltage
200
400
0.50%
0.50%
+125°C Maximum Ratings
(see Derating Curve)
80
80
Resistance Tolerance:
±1%
(consult factory for tighter tolerances).
Overload/Overvoltage:
1.5 times
maximum working voltage for 5 seconds,
∆R
0.50% max.
Operating Temperature:
-40°C to +150°C.
Temperature Coefficient:
See Table for TC
value. TC referenced to +25°C,
∆R
taken at
-15°C and +105°C.
Insulation Resistance:
10,000 Megohms,
minimum.
Load Stability:
%∆R is shown in the table
for 1,000 hours at rated voltage.
Fig 2
Thermal Shock:
MIL-STD-202, Method 107,
Cond. B, except low temperature is -40°C,
∆R
0.50% max.
Solderable Leads:
Matte Tin Plated Copper.
Moisture Resistance:
MIL-STD-202,
Method 106,
∆R
0.50% max.
Fig 1
Model MK227 and MK727
.095
±.005
(2.41
±.13)
MK227
10.0
1%
Model MK232 and MK732
MK732
100 MEG
1%
Derating Curve:
100
100% @ +85°C
% RATED POWER
.245
±.010
(6.22
±.26)
.250
±.050
(6.35
±1.27)
.150
±.015
(3.81
±.38)
.290
±.010
(7.37
±.26)
.250
±.050
(6.35
±1.27)
.200
±.015
(5.08
±.38)
.095
±.005
(2.41
±.13)
80
60
40
20
0
25
85
125
150
40% @ +125°C
.245
±.010
(6.22
±.26)
.290
±.010
(7.37
±.26)
.025
±.002
(.64
±.05)
DIA.,
LEADWIRE OFFSET
.012 (.31)
FROM CENTERLINE
.025
±.002
(.64
±.05)
DIA.,
LEADWIRE OFFSET
.012 (.31)
FROM CENTERLINE
AMBIENT TEMPERATURE, °C
DIMENSIONS IN INCHES AND (MILLIMETERS)
e-mail: caddock@caddock.com • web: www.caddock.com
For Caddock Distributors listed by country see caddock.com/contact/dist.html
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