Dimensions of standard styles (mm) & Weight (g)

Wrap around

planar

Style

L

W

T

A

B*

C

Wt

0805

2.0 ± 0.3 1.25 ± 0.2

0.6

0.3 ± 0.15

0.9min

0.3 ± 0.1

0.009

1005

2.5 ± 0.3 1.25 ± 0.2

0.7

Not available

0.4 ± 0.15

0.015

1206

3.2 ± 0.4 1.6 ± 0.2

0.7

0.4 ± 0.2

1.7min

0.4 0.15

0.020

Precision Thick Film

Surface Mounted Resistors

PCR Series

soldering

specified range

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.

Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com

Electrical Data

Issue D · 08.04

A subsidiary of

TT electronics plc

Welwyn Components

PCR0805

PCR1005

PCR1206

Notes

Power rating at 70°C

watts

0.1

0.125

0.25

Resistance range

ohms

10R to 1M

Limiting element voltage

volts

100

150

200

TCR -55°C to +155°C

ppm/°C

100

TCR +20°C to +70°C

ppm/°C

50

Resistance tolerance

%

0.1, 0.25, 0.5, 1

Values

E24 & E96 preferred

Any value to order

Thermal impedance

°C/watt

360

290

200

For 10 devices mounted

on a 50 x 25 mm p.c.b. area

Ambient temperature range*

°C

-55 to 155

Physical Data

*See Application Notes

33

T

W

A

A

B

L

Wrap-around terminations

(3 faces)

T

W

L

Planar terminations

C

C

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

Construction

Thick film resistor material, overglaze and organic protection

are screen printed on a 96% alumina substrate.

Adjustment

The components are adjusted to final value using a specially

developed technique, which assures optimum load stability

performance.

Terminations

Planar (or single-sided) termination is gold and suitable for

wire-bonding; wrap around is suitable for soldering.

Solderability

Wrap-around terminations have an electroplated nickel barrier

and solder coating, this ensures excellent ‘leach’ resistance

properties and solderability. They will withstand immersion in

solder at 260°C for 30 seconds.

Alternative styles for surface

mounting resistors

PCR_D.qxd

8/9/04

3:54 PM

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