MO
Metal Oxide Flame Proof Resistors
INTRODUCTION
These Metal Oxide Resistors offer excellent performance in applications where stability and uniformity
of characteristics are desired. They provide lower cost alternatives to Carbon Composition Resistors
and General Purpose Metal Films. These Metal Oxides meet overload tests in accordance with UL-
1412 specification. (UL-1412 is the standard for fusing resistors and temperature-limited resistors
without producing a fire hazard).
18
FEATURES
•
•
•
•
•
•
High power to size ratio for significant space savings.
Flameproof.
Low cost, high performance.
Excellent long term stability.
High surge/overload capability.
Lead Free
RATINGS
Type
Rated Power at 70° C
Operating Temp. Range
Derated to 0 Load at
Maximum Working
Voltage
Maximum Overload
Voltage
Resistance Range
2%, E-24
5%, E-24
Temperature Coefficient
M01/4
1/4W
MO1/2
1/2W
MO1/2S
1/2W
MO1
1W
MO1SS
1W
MO2
2W
MO2SS
2W
MO3
3W
MO3SS
3W
MO5
5W
MO5SS
5W
MO7
7W
-55° C to +200° C
+200C
200V
250V
250V
350V
350V
500V
500V
500V
500V
500V
500V
500V
400V
500V
500V
700V
700V
700V
1000V
1000V
1000V
1000V
1000V
1000V
10Ω-
100KΩ
10Ω-
100KΩ
10Ω-
100KΩ
10Ω-
100KΩ
10Ω-
100KΩ
10Ω-
100KΩ
10Ω-
100KΩ
10Ω-
100KΩ
10Ω-
100KΩ
10Ω-
100KΩ
10Ω-
100KΩ
10Ω-
100KΩ
±
350ppm/° C
DIMENSIONS
l
L
ød
øD
Type
MO1/4 / MO1/2SS
MO1/2 / MO1SS
MO1 / MO2SS
MO2 / MO3SS
MO3 / MO 5 / MO5SS
MO7
DIMENSIONS
L
6.30± 0.5
9.00± 0.5
12.00± 1.0
16.00± 1.0
25.00± 2.0
41.00± 1.0
(Millimeters)
D
2.30± 0.3
3.20± 0.5
4.50± 0.5
5.00± 0.5
8.50± 1.0
8.50± 1.0
l
28.0± 3.0
28.0± 3.0
35.0± 3.0
35.0± 3.0
38.0± 3.0
38.0± 3.0
d
0.60± 0.05
0.60± 0.05
0.80± 0.05
0.80± 0.05
0.80± 0.05
0.80± 0.05
ASJ PTE LTD
MO
Metal Oxide Flame Proof Resistors
PERFORMANCE CHARACTERISTICS
Performance Test
DC Resistance
Resistance Temperature Coefficient
Short Time Overload
Dielectric Withstanding Voltage
Insulation Resistance
Current Noise
Solderability
Resistance to Soldering Heat
Robustness of electrode
(Terminal Strength)
Resistance to Solvents
Moisture Resistance
Temperature Cycling
Low Temperature Operation
High Temperature Exposure
Flameproof
Loadlife
DERATING CURVE
100
Test Method
MIL-STD-202F, Method 303
MIL-STD-202F, Method 304
MIL-R-55342E, Sect. 4.7.5
MIL-STD-202F, Method 301
MIL-STD-202F, Method 302
MIL-STD-202F, Method 308
MIL-STD-202F, Method 208
MIL-R-55342E, Sect. 4.7.7
MIL-STD-202F, Method 211
MIL-STD-202F, Method 215
MIL-STD-202F, Method 106
MIL-STD-883F, Method 1010.7
MIL-R-55342E, Sect. 4.7.4
MIL-R-55342E, Sect. 4.7.6
UL-1412
MIL-STD-202F, Method 108
Specification
±
2%,
±
5% Tolerance
±
350ppm/ºC
±
(0.5% + 0.05Ω)
±
(0.5% + 0.05Ω)
>10
3
MΩ
<0.1µ v/v
>95% coverage
±
(0.5% + 0.05Ω)
±
(1.0% + 0.05Ω)
No Damage to lacquer & colour coding
±
(1.0% + 0.05Ω)
±
(0.5% + 0.05Ω)
±
(0.5% + 0.05Ω)
±
(1.0% + 0.05Ω)
No evidence of flame
±
(1.0% + 0.1Ω),
±
(3.0%+0.1Ω)
19
Rated Power (%)
80
60
40
20
-55ºC
70ºC
235ºC
0
-50
-25
0
25
50
75
100
125
150
175
200
225
250
Ambient Temperature (ºC)
ORDERING CODE
MO XXXXX
-
XXXX X
-
X X
Resistor
Metal
Oxide
Size
1/4
1/2SS
1/2
1SS
1
2SS
2
3SS
3
5SS
5
7
Nominal Resistance
3-
Digit
Resistors
4-
Digit
E24 Series
2.2Ω=2R2
100Ω=101
E96 Series
10.2Ω=10R2
10KΩ=1002
Resistance
Tolerance
F=± 1%
G=± 2%
J=± 5%
Packaging
A=Ammo (52MM)
S=Spool (52MM)
M=Ammo (26MM)
R=Spool (26MM)
N=Ammo (73MM)
Q=Spool (73MM)
B=Bulk
Quantity
1 = 1000 pcs
2 = 2000 pcs
3 = 3000 pcs
5 = 5000 pcs
05 = 500 pcs
ASJ PTE LTD
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