Type MM and ML Precision Film Resistors
High Temperature Resistors for Geophysical, Industrial, and Military Requirements
Type MM and ML resistors have a proven performance history in industrial and military applications. Utilizing
our proven Micronox® resistance films, these resistors are available with power ratings up to 1 Watt
and resistance values to 10 Megohms. These resistors are ideal for applications requiring tolerances as close as 0.1% and
extended life stability of 0.1% per 1,000 hours.
Some models of Type MM and ML resistors are manufactured with Caddock's Non-Inductive Design that provides for
neighboring lines to carry current in opposite directions. This efficient non-inductive construction is accomplished without
derating of any performance advantages.
Type MM features:
•
Max. Operating Temperature to +275°C. • High Power Rating at +125°C.
• TC of 50 ppm/°C from -15°C to +105°C.
• Non-Inductive Performance Available.
Type ML features:
•
TC of 50 ppm/°C from -15°C to +105°C. • Non-Inductive Performance Available.
Caddock's
Non-Inductive
Design
N
Oper.
Temp.
(Max.)
Resistance
Min.
Dimensions in inches and (millimeters)
Specifications:
Model Watt-
Max.
Voltage
Dielect.
Strength
No.
age
Max.
500 K
1 Meg
2 Meg
5 Meg
10 Meg
300 K
A
B
C
Resistance Tolerance: ±1% (tolerances to 0.1%
on special order).
.160 ±.010
(4.06 ±.26)
.065 ±.010
(1.65 ±.26)
.018 ±.004
(.48 ±.10)
MM112
MM125
MM152
MM177
MM215
ML104
0.12
0.25
0.4
200
200
300
500
800
200
400
500
275°C
45 Ω
30 Ω
30 Ω
45 Ω
45 Ω
50 Ω
Temperature Coefficient: 50 ppm/°C referenced
to +25°C, ΔR taken at -15°C and +105°C.
.188 ±.020
(4.78 ±.51)
.070 ±.015
(1.78 ±.38)
.020 ±.002
(.51 ±.05)
.250 ±.020
(6.35 ±.51)
.094 ±.006
(2.39 ±.15)
.025 ±.002
(.64 ±.05)
750
Insulation Resistance: 10,000 Megohms, min.
.313 ±.020
(7.95 ±.51)
.094 ±.006
(2.39 ±.15)
.025 ±.002
(.64 ±.05)
Overload/Overvoltage: 5 times rated power
with applied voltage not to exceed 1.5 times
maximum continuous operating voltage for 5
seconds, ΔR 0.5% max. or 0.5 ohm max.,
whichever is greater.
0.6
750
.400 ±.020
(10.16 ±.51)
.150 ±.010
(3.81 ±.26)
.025 ±.002
(.64 ±.05)
1.0
1,000
400
.160 ±.010
(4.06 ±.26)
.065 ±.010
(1.65 ±.26)
.018 ±.004
(.48 ±.10)
0.08
.188 ±.020
(4.78 ±.51)
.070 ±.015
(1.78 ±.38)
.020 ±.002
(.51 ±.05)
ML114
ML124
ML131
ML181
0.15
0.25
0.4
200
300
500
600
500
750
750
750
500 K
600 K
1 Meg
5 Meg
175°C
50 Ω
50 Ω
50 Ω
50 Ω
Thermal Shock: Mil-Std-202, Method 107,
Cond. F, ΔR 0.2% max. or 0.5 ohm max.,
whichever is greater.
.250 ±.020
(6.35 ±.51)
.094 ±.006
(2.39 ±.15)
.025 ±.002
(.64 ±.05)
.313 ±.020
(7.95 ±.51)
.094 ±.006
(2.39 ±.15)
.025 ±.002
(.64 ±.05)
Moisture Resistance: Mil-Std-202, Method 106,
ΔR 0.5% max. or 0.5 ohm max., whichever is
greater.
.400 ±.020
(10.16 ±.51)
.150 ±.010
(3.81 ±.26)
.025 ±.002
(.64 ±.05)
0.6
Loadlife: 1,000 hours at +125°C at rated power,
not to exceed rated voltage, ΔR 0.5% max. or 0.5
ohm max., whichever is greater.
Models with low inductance construction are in shaded areas.
Models with Caddock's Non-Inductive Resistance Pattern are in non-shaded areas.
Solderable leads
Replacement Notes:
Encapsulation: Transfer Molded.
Model MM216 replaced by MS221
Model MM217 replaced by MS223
Model MM224 replaced by MS244
Model MM225 replaced by MS245
Model MM236 replaced by MS260
Model ML212 replaced by MS221
Model ML213 replaced by MS223
Model ML218 replaced by MS244
Model ML219 replaced by MS245
Model ML226 replaced by MS260
B
A
1.500 ± .125
C
(38.10 ± 3.18)
DIMENSIONS IN INCHES AND (MILLIMETERS)
Ordering Information:
ML124 - 20.0K - 1%
Derating Curve:
Model Number:
Resistor Value:
Tolerance
100
80
A - ML
B - MM
60
RATED POWER OR
RATED VOLTAGE, %
B
A
40
20
0
Note: The MM and ML resistors are intended for high performance electronics applications
that are outside the scope of the RoHS directive. Contact Caddock Applications Engineering
for an RoHS compliant alternative.
25
75
125
175
225 275
AMBIENT TEMPERATURE, °C
Applications Engineering
17271 North Umpqua Hwy.
Roseburg, Oregon 97470-9422
Phone: (541) 496-0700
Fax: (541) 496-0408
Sales and Corporate Office
1717 Chicago Avenue
Riverside, California 92507-2364
Phone: (951) 788-1700
e-mail: caddock@caddock.com • web: www.caddock.com
For Caddock Distributors listed by country see caddock.com/contact/dist.html
Fax: (951) 369-1151
© 2006 Caddock Electronics, Inc.
IL-124.1206
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