Power Metal Oxide

Film Resistors

MO-S Series

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Issue C · 07.04

Welwyn Components

150

b

6

6

c

≤ 1.4 mm

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

is taped and ammo packed, MO5S is taped and reeled. The

critical dimensions are shown in Figure 1.

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.

Alternative packaging available by request.

Figure 1

60

80

100

120

140

160

180

200

220

240

100

90

80

70

60

50

40

30

20

10

0

Ambient Temp

MO-S Series Derating Curve

Maximum

Load at rated power: 1000 hrs at 70°c

∆R%

5

Shelf life: 12 months at room temperature

∆R%

2

Derating

See derating curve

Climatic

∆R%

1

Climatic category

40/125/56

Temperature rapid change

∆R%

0.5

Resistance to solder heat

∆R%

0.5

Performance Data

Type

MO1S

MO2S

MO3S

MO5S

b

52

52

52

67

85

c

5

5

5

10

10

Type

MO1S

MO2S

MO3S

MO5S

Reel

5000

2500

2500

1000

700

Ammo pack

5000

2500

1500

1000

n/a

Standard Quantities Per Package

OBSOLETE