| Metal Oxide Film
Flame Proof Resistors |
Print Version |
Introduction: The WMO series Metal
Oxide Film Resistors are manufactured using the latest technology
to ensure a very stabe resistive medium. The resistors are insulated
with layers of flame proof eproxy. The WMO series offer a wide
range of power rating (0.25W, 0.50 W, 1W, 2W & 3W), having
tolerance ranges from  1%,2%,5%
|
| |
|
| S
p e c i f i c a t i o n s |
| Type
No. |
WMO
25 |
WMO
50
WMO 50M |
WMO
100
WMO 100M |
WMO
200
WMO 200 |
WMO
300M |
| Rated
Power at 70oC |
0.25W |
0.5W |
1W |
2W |
3W |
| Resistance
Range |
10
E to 1 meg |
10
E to 1 meg |
10
E to 1 meg |
10
E to 1 meg |
10
E to 1 meg |
| Max.
working voltage to 70oC at |
250V |
350V |
500V |
500V |
500V |
| Operating
Temperature Range |
-40oC
+ 150oC |
-40oC
+ 150oC |
-40oC
+ 150oC |
-40oC
+ 150oC |
-40oC
+ 150oC |
| C h a r a c t e r i
s t i c s |
| Type No. |
WMO 25 |
WMO 50/WMO 50M |
WMO 100/WMO 100M |
WMO 200/WMO 200M |
WC-300M |
| Dielectric Strength |
500V No break down
 R
max. 0.5% |
700V No break down
R
max. 0.5% |
1000V No break down
R
max. 0.5% |
1000V No break down
R
max. 0.5% |
1000V No break down
R
max. 0.5% |
| Terminal Strength |
no damage
R
max. 0.5%
|
no damage
R
max. 0.5%
|
no damage
R
max. 0.5%
|
no damage
R
max. 0.5%
|
no damage
R
max. 0.5% |
| Resistance to soldering heat (350oC) |
R
max. 0.5% |
R
max. 0.5% |
R
max. 0.5% |
R
max. 0.5% |
R
max. 0.5% |
| Solderability |
good tinning
no damage |
good tinning
no damage |
good tinning
no damage |
good tinning
no damage |
good tinning
no damage |
| Temperature Cycling -40oC to 150oC |
good tinning
R
max. 0.25% |
good tinning
R
max. 0.25% |
good tinning
R
max. 0.25% |
good tinning
R
max. 0.25% |
good tinning
R
max. 0.25% |
| Life 1000 hours at rated Power |
R
max. 1% |
R
max. 1% |
R
max. 1% |
R
max. 1% |
R
max. 1% |
| Short time overloaded |
R
max. 0.5% |
R
max. 0.5% |
R
max. 0.5% |
R
max. 0.5% |
R
max. 0.5% |
| Vibration |
no damage
R
max. 0.5%
|
no damage
R
max. 0.5%
|
no damage
R
max. 0.5%
|
no damage
R
max. 0.5%
|
no damage
R
max. 0.5%
|
| Resistance to solvents |
no damage |
no damage |
no damage |
no damage |
no damage |
 |
| Standard Resistance Values |
| E 24 S e r i e s |
| 10 |
11 |
12 |
13 |
15 |
16 |
18 |
20 |
22 |
24 |
27 |
30 |
| 33 |
36 |
39 |
43 |
47 |
51 |
56 |
62 |
68 |
75 |
82 |
91 |
| D i m e n s i o n s
i n m m |
| TYPE WMO 25 |
H = 28
2 |
L = 6.0
0.4 |
D = 2.25
0.1 |
d = 0.6
0.02 |
| TYPE WMO 50/WMO 100M |
H = 28
2 |
L = 9
0.5 |
D = 3.2
0.2 |
d = 0.6
0.02 |
| TYPE WMO 100/WMO 200M |
H = 28
2 |
L = 11
1.0 |
D = 4.3
0.5 |
d = 0.8
0.02 |
| TYPE WMO 200/WMO 300M |
H = 28
2 |
L = 14.5
0.02 |
D = 4.7
0.5 |
d = 0.8
0.02 |
|
| Colour |
1st Figure |
2nd Figure |
3rd Figure |
multiplier |
Tolerance |
| Black |
0 |
0 |
0 |
0 |
|
| Brown |
1 |
1 |
1 |
10 |
1% |
| Red |
2 |
2 |
2 |
100 |
2% |
| Orange |
3 |
3 |
3 |
1,000 |
|
| Yellow |
4 |
4 |
4 |
10,000 |
|
| Green |
5 |
5 |
5 |
100,00 |
0.5% |
| Blue |
6 |
6 |
6 |
1,000,000 |
0.25% |
| Violet |
7 |
7 |
7 |
10,000,000 |
|
| Gray |
8 |
8 |
8 |
|
0.1% |
| White |
9 |
9 |
9 |
|
|
| Gold |
|
|
|
0.1 |
5% |
| Silver |
|
|
|
0.01 |
10% |
|
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