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Welwyn
Welwyn

MO1S Datasheet Preview

MO1S Datasheet

Power Metal Oxide Film Resistors

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MO1S pdf
Power Metal Oxide
Film Resistors
MO-S Series
Small size
www.datasheet4u.com
for
power
rating
Can replace carbon composition in many
pulse handling applications
Flameproof protection
Welwyn Components
Electrical Data
Power rating at 70°C
Restance range
Limiting element voltage
TCR
Isolation voltage
Resistance tolerance
Standard values
Thermal impedance
Ambient temperature range
Physical Data
watts
ohms
volts
ppm/°C
volts
%
MO1/2S
0.5
10R - 50K
250
350
°C/watt
°C
140
MO1S
1.0
110
Dimensions (mm) and Weight (g)
Type
MO1/2S
MO1S
MO2S
MO3S
MO5S
L max.
6.2
9.0
12.5
14.5
25.0
D max.
2.5
3.6
4.2
5.3
8.5
f min.
21.0
19.6
17.8
23.8
27.6
d nom.
0.6
0.8
0.8
0.8
0.8
pcb
mounting
centres
10.0
12.5
15.0
20.0
30.0
Min
bend
radius
0.6
1.2
1.2
1.2
1.2
Wt.
nom.
0.3
0.5
0.9
1.1
4.3
MO2S
2.0
10R - 100K
350
350
500
5, 10
E24 preferred
80
-55 to +155
MO3S
3.0
60
MO5S
5.0
10R - 100K
500
700
35
dD
L
f
Construction
The tin oxide resistance element is deposited onto a high
purity ceramic rod. End caps are force fitted and termination
wires are welded to the end caps. The element is adjusted to
the required resistance value by a helical cut; finally a cement
protection is applied to the resistor body prior to marking
with indelible ink.
Terminations
Material
Resistor sizes up to and including the MO3S
use solder coated copper terminations. MO4S
and MO5S use solder coated steel cored
terminations.
Strength
The terminations meet the requirements of
IEC 68.2.21.
Solderability The terminations meet the requirements of
IEC 115-1, Clause 4.17.3.2.
Marking
MO1/2S, MO1S, MO2S and MO3S resistors are colour coded
with four bands. IEC 62 colours are used. For larger sizes type
reference, resistance value and tolerance are legend marked.
The resistance value marking conforms to lEC 62.
Solvent Resistance
The body protection and marking are resistant to all normal
industrial cleaning solvents suitable for printed circuits.
Flammability
The resistor coating will not burn or emit incandescent
particles under any condition of applied temperature or
power overload.
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
© Welwyn Components Limited · Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email :info@welwyn-tt.com · Website: www.welwyn-tt.com
A subsidiary of
TT electronics plc
Issue C · 07.04
149



Welwyn
Welwyn

MO1S Datasheet Preview

MO1S Datasheet

Power Metal Oxide Film Resistors

No Preview Available !

MO1S pdf
Power Metal Oxide
Film Resistors
MO-S Series
Welwyn Components
Performance Data
www.datasheet4u.com
Load at rated power: 1000 hrs at 70°c
Shelf life: 12 months at room temperature
Derating
Climatic
Climatic category
Temperature rapid change
Resistance to solder heat
R%
R%
R%
R%
R%
Maximum
5
2
See derating curve
1
40/125/56
0.5
0.5
Application Notes
1. If the resistors are to dissipate full rated power, it is
recommended that the terminations should not be
soldered closer than 4mm from the body.
2. Due to operating temperature limitations imposed by some
pcb materials, derating may be necessary. An estimate of
the temperature rise to be expected can be calculated
using the thermal impedance figures given under Electrical
Data.
3. MO-S resistors can also be supplied pre-formed.
See lead form section for details.
Packaging
Our standard packaging for MO1/2S, MO1S, MO2S and MO3S
is taped and ammo packed, MO5S is taped and reeled. The
critical dimensions are shown in Figure 1.
100
90
80
70
60
50
40
30
20
10
0
60
MO-S Series Derating Curve
80 100 120 140 160 180 200 220 240
Ambient Temp
Figure 1
c
The component wires will not protrude beyond the outside
edge of the tapes.
Pre-formed resistors are supplied loose packed in plastic bags
or boxes.
f1
6
b
f2
6
Body Location f1 – f2 1.4 mm
Alternative packaging available by request.
Type
b
c
MO1/2S MO1S
52 52
55
MO2S
52
5
MO3S
67
10
MO5S
85
10
Standard Quantities Per Package
Type MO1/2S MO1S
Reel 5000 2500
Ammo pack 5000 2500
MO2S
2500
1500
MO3S
1000
1000
MO5S
700
n/a
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
150
Issue C · 07.04


Part Number MO1S
Description Power Metal Oxide Film Resistors
Maker Welwyn
Total Page 2 Pages
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