Surface Mounted

Thermistors

PTCR Series

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.

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Electrical Data

Issue C · 08.04

A subsidiary of

TT electronics plc

Welwyn Components

Commercial

PTCR 0805

PTCR 1206

Notes

Power rating at 70°C

watts

0.1

0.25

Resistance range

ohms

10R to 400R

10R to 800R

Limiting element voltage

volts

100

200

TCR -55°C to 155°C

ppm/°C

See table below

Resistance tolerance at 20°C

%

2, 5, 10

Ambient temperature range

°C

-55 to 155

Values

ohms

E24 & E96 preferred

Any value to order

Thermal impedance

°C/watt

360

200

For 10 devices

mounted on a

50 x 25mm p.c.b. area

37

Variation of TCR within Value Range

Value range (ohms)

TCR (ppm/°C)

10 to <25

3500 ± 10%

25 to <50

3100 ± 10%

50 to <100

2900 ± 10%

10 to <200

2700 ± 15%

200 to <400

2400 ± 15%

400 to <800

2200 ± 15%

Physical Data

10000

1000

100

10

1

-55

-15

25

65

105

145

Temperature

°C

10R

800R

Dimensions (mm) and weight (g)

Style

L

W

T max

A

B*

Wt nom

0805

2.0 ± 0.3 1.25 ± 0.2

0.6

0.3 ± 0.15

0.9 min

0.009

1206

3.2 ± 0.4

1.6 ± 0.2

0.7

0.4 ± 0.2

1.7 min

0.0090

*This dimension determines the number of conductors which may pass under the surface mounted device.

T

W

A

A

B

L

Wrap-around terminations

(3 faces)

PTCR_C.qxd

8/9/04

4:00 PM

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