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.
MM 112, ML104
MM 125, ML114
MM 152, ML124
MM177, ML131
N
Model
No.
Caddock's
Non-Inductive
Design
MM215, ML181
Watt-
age
Max.
Voltage
Oper.
Temp.
(Max.)
Dielect.
Strength
Resistance
Min.
Max.
Dimensions in inches and (millimeters)
A
.160
±.010
(4.06
±.26)
.26)
.188
±.020
(4.78
±.51)
.51)
.250
±.020
(6.35
±.51)
.51)
.400
±.020
(10.16
±.51)
.160
±.010
(4.06
±.26)
.313
±.020
(7.95
±.51)
.51)
B
.065
±.010
(1.65
±.26)
.26)
.070
±.015
(1.78
±.38)
.38)
.094
±.006
(2.39
±.15)
.15)
.150
±.010
(3.81
±.26)
.065
±.010
(1.65
±.26)
.094
±.006
(2.39
±.15)
.15)
C
.018
±.004
(.48
±.10)
.10)
.020
±.002
(.51
±.05)
.05)
.025
±.002
(.64
±.05)
.05)
.025
±.002
(.64
±.05)
.05)
.025
±.002
(.64
±.05)
.018
±.004
(.48
±.10)
Specifications:
Resistance Tolerance:
±1% (tolerances to 0.1%
on special order).
Temperature Coefficient:
50 ppm/°C referenced
to +25°C,
ΔR
taken at -15°C and +105°C.
MM112
MM125
MM152
MM177
MM215
ML104
ML114
ML124
ML131
ML181
0.12
0.25
0.4
0.6
1.0
0.08
0.15
0.25
0.4
0.6
200
200
300
500
800
200
200
300
500
600
275°C
275°C
275°C
275°C
275°C
175°C
175°C
175°C
175°C
175°C
400
500
750
750
1,000
400
500
750
750
750
45
Ω
30
Ω
30
Ω
45
Ω
45
Ω
50
Ω
50
Ω
50
Ω
50
Ω
50
Ω
500 K
1 Meg
2 Meg
5 Meg
10 Meg
300 K
500 K
600 K
1 Meg
5 Meg
.188
±.020
(4.78
±.51)
.250
±.020
(6.35
±.51)
.400
±.020
(10.16
±.51)
.313
±.020
(7.95
±.51)
.51)
.070
±.015
(1.78
±.38)
.094
±.006
(2.39
±.15)
.094
±.006
(2.39
±.15)
.15)
.150
±.010
(3.81
±.26)
.020
±.002
(.51
±.05)
.025
±.002
(.64
±.05)
.025
±.002
(.64
±.05)
.05)
.025
±.002
(.64
±.05)
Insulation Resistance:
10,000 Megohms, min.
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.
Thermal Shock:
Mil-Std-202, Method 107,
Cond. F,
ΔR
0.2% max. or 0.5 ohm max.,
whichever is greater.
Moisture Resistance:
Mil-Std-202, Method 106,
ΔR
0.5% max. or 0.5 ohm max., whichever is
greater.
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.
Solderable leads
Encapsulation:
Transfer Molded.
1.500
±
.125
(38.10
±
3.18)
A
B
C
Models with low inductance construction are in shaded areas.
Models with Caddock's Non-Inductive Resistance Pattern are in non-shaded areas.
Replacement Notes:
Model
Model
Model
Model
Model
MM216
MM217
MM224
MM225
MM236
replaced
replaced
replaced
replaced
replaced
by
by
by
by
by
MS221
MS223
MS244
MS245
MS260
Model
Model
Model
Model
Model
ML212
ML213
ML218
ML219
ML226
replaced
replaced
replaced
replaced
replaced
by
by
by
by
by
MS221
MS223
MS244
MS245
MS260
Ordering Information
:
Model Number:
ML124 - 20.0K - 1%
DIMENSIONS IN INCHES AND (MILLIMETERS)
Resistor Value:
Tolerance
Derating Curve:
RATED POWER OR 60
RATED VOLTAGE, % 40
0
100
80
A
B
A - ML
B - MM
225
275
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.
Applications Engineering
17271 North Umpqua Hwy.
Roseburg, Oregon 97470-9422
Phone: (541) 496-0700
Fax: (541) 496-0408
© 2006 Caddock Electronics, Inc.
20
25
AMBIENT TEMPERATURE,
°C
75
125
175
e-mail: caddock@caddock.com • web: www.caddock.com
For Caddock Distributors listed by country see caddock.com/contact/dist.html
Sales and Corporate Office
1717 Chicago Avenue
Riverside, California 92507-2364
Phone: (951) 788-1700
Fax: (951) 369-1151
IL-124.1206
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