Type MS Power Film Resistors
Page 2 of 2
MS126, MS150
MS151, MS175
MS176, MS210
MS214
MS220
MS221
MS223
MS244
Construction:
The Type MS Power
FilmResistoris constructed
®
with Micronox resistance films
bonded to a high strength solid
ceramic core. Nickel alloy end caps
and axial leads complete the assembly.
Encapsulation is provided by
temperature silicone conformal coating.
MS245
MS260
a
high
Type MS: Lead material is Nickel Clad Copper
with thin Gold Plate, solderable.
MS281
MS310
For welding applications, optional pure nickel
leads are available on Models MS126, MS150,
MS151, MS175, MS176, MS210. Contact
Caddock Applications Engineering.
MS313, MS315
MS322
Resistance
Dimensions in inches and (millimeters)
Watt-
age at
+25°C
Watt-
age at
+125°C
Model
No.
Max. Dielect.
Voltage Strength
Specifications:
Min.
20 Ω
20 Ω
20 Ω
20 Ω
45 Ω
45 Ω
45 Ω
Max.
1 Meg
2 K
A
B
C
Resistance Tolerance: ±1% (tolerances to 0.1% on
.188 ±.020 .070 ±.015 .020 ±.002
(4.78 ±.51) (1.78 ±.38) (.51 ±.05)
.188 ±.020 .070 ±.015 .020 ±.002
(4.78 ±.51) (1.78 ±.38) (.51 ±.05)
.250 ±.020 .094 ±.015 .025 ±.002
(6.35 ±.51) (2.39 ±.38) (.64 ±.05)
.250 ±.020 .094 ±.015 .025 ±.002
(6.35 ±.51) (2.39 ±.38) (.64 ±.05)
.313 ±.020 .094 ±.015 .025 ±.002
(7.95 ±.51) (2.39 ±.38) (.64 ±.05)
.313 ±.020 .094 ±.015 .025 ±.002
(7.95 ±.51) (2.39 ±.38) (.64 ±.05)
.313 ±.030 .109 ±.025 .025 ±.002
(7.95 ±.76) (2.77 ±.64) (.64 ±.05)
.400 ±.060 .140 ±.030 .025 ±.002
(10.16 ±1.52) (3.56 ±.76) (.64 ±.05)
.575 ±.050 .165 ±.030 .032 ±.002
(14.61 ±1.27) (4.19 ±.76) (.81 ±.05)
.480 ±.060 .230 ±.030 .040 ±.002
(12.19 ±1.52) (5.84 ±.76) (1.02 ±.05)
.950 ±.060 .230 ±.030 .040 ±.002
(24.13 ±1.52) (5.84 ±.76) (1.02 ±.05)
.570 ±.060 .300 ±.030 .040 ±.002
(14.48 ±1.52) (7.62 ±.76) (1.02 ±.05)
MS126 0.25
MS150 0.50
MS151 0.50
MS175 0.75
MS176 0.75
0.25
0.30
0.50
0.45
0.75
0.60
0.60
1.2
200
500
500
special order).
Temperature Coefficient: 50 ppm/°C. TC referenced
to +25°C, ΔR taken at -15°C and +105°C.
*
300
750
2 Meg
2 K
750
Insulation Resistance: 10,000 Megohms, min.
*
Overload/Overvoltage: 5 times rated power with applied
voltage not to exceed 1.5 times maximum continuous oper-
ating voltage for 5 seconds. ΔR 0.5% max. or 0.5 ohm
max., whichever is greater.
500
750
5 Meg
3 K
MS210
MS214
MS220
MS221
MS223
MS244
MS245
MS260
MS281
1.0
1.0
2.0
3.0
3.0
4.0
4.0
6.0
8.0
750
*
500
750
5 Meg
1,000
1,000
800
800
20 Ω 10 Meg
45 Ω 10 Meg
Thermal Shock: Mil-Std-202, Method 107, Cond. C, ΔR
0.5% max. or 0.5 ohm max., whichever is greater.
1.8
800
1.8
1,000
1,000
1,000
1,000
1,000
1,000
1,000
1,000
20 Ω
45 Ω 15 Meg
20 Ω 6 Meg
45 Ω 15 Meg
45 Ω 8 Meg
4 Meg
Moisture Resistance: Mil-Std-202, Method 106, ΔR 0.5%
max. or 0.5 ohm max., whichever is greater.
2.4
2,000
800
Load Life: 1,000 hours at rated power at +25°C or
+125°C (see derating curve), not to exceed rated voltage,
ΔR 0.5% max. or 0.5 ohm max., whichever is greater.
2.4
.970 ±.060
.300 ±.030 .040 ±.002
3.6
2,000
2,000
4,500
6,000
(24.64 ±1.52) (7.62 ±.76) (1.02 ±.05)
.910 ±.060 .350 ±.040 .040 ±.002
4.8
(23.11 ±1.52) (8.89 ±1.02) (1.02 ±.05)
Maximum Operating Temperature: +275°C.
1.250 ±.070 .350 ±.040 .040 ±.002
(31.75 ±1.78) (8.89 ±1.02) (1.02 ±.05)
MS310 10.0
MS313 12.5
MS315 15.0
MS322 22.0
6.0
45 Ω 20 Meg
50 Ω 30 Meg
Encapsulation: High Temperature Silicone Conformal.
2.000 ±.080 .350 ±.040 .040 ±.002
7.5
(50.80 ±2.03) (8.89 ±1.02) (1.02 ±.05)
B
2.000 ±.080 .350 ±.040 .040 ±.002
(50.80 ±2.03) (8.89 ±1.02) (1.02 ±.05)
3.000 ±.090 .350 ±.040 .040 ±.002
(76.20 ±2.29) (8.89 ±1.02) (1.02 ±.05)
1.500 ± .125
A
C
9.0
50 Ω
1 Meg
(38.10 ± 3.18)
*
*
13.2
1,000 100 Ω 1.5 Meg
Limited by power rating
.
DIMENSIONS IN INCHES AND (MILLIMETERS)
*
Models with low inductance construction are in shaded areas.
Models with Caddock's Non-Inductive Resistance Pattern are in non-shaded areas.
100
Derating Curve:
A - all MS models
except MS126,
MS151, MS176
80
B
A
60
40
20
0
RATED POWER OR
RATED VOLTAGE, %
Ordering Information:
MS220 -100K - 1%
B - MS126, MS151,
MS176
Model Number:
Resistor Value:
Tolerance
25
75
125
175
225 275
AMBIENT TEMPERATURE, °C
Applications Engineering
17271 North Umpqua Hwy.
Roseburg, Oregon 97470-9422
Phone: (541) 496-0700
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: (541) 496-0408
Fax: (951) 369-1151
© 2004 Caddock Electronics, Inc.
28_IL108.1004
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