Pulse Withstanding

Chip Resistors

PWC 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.

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

Electrical Data

Issue G · 03.06

A subsidiary of

TT electronics plc

Size

0805

1206

2010

2512

Power @70°C

W

0.125

0.33

0.75

1.5

Resistance range

Ohms

1R0 to 10M

Tolerance

%

10R to 1M: 0.5, All values: 1, 5

LEV

V

150

200

400

500

TCR

ppm/°C

<10R:200

≥10R:100

Operating temperature

°C

-55 to +155

Thermal Impedance

°C/W

220

160

80

50

Pad / trace area*

40

50

60

100

Values

E24 or E96 preferred other values to special order

Pulse capability

See graphs - full application note available on request

37

Physical Data

Construction

Thick film resistor material, overglaze and organic protection

are screen printed on a 96% alumina substrate. Wrap-around

terminations have an electroplated nickel barrier and solder

coating, this ensures excellent ‘leach’ resistance properties

and solderability.

Marking

Components are not marked. Reels are marked with type,

value, tolerance, date code and quantity.

Solvent Resitance

The body protection is resistant to all normal industrial

cleaning solvents suitable for printed circuits.

Dimensions of PWC resistors are given below in mm and weight in g

L

W

T max

A

B

C

Wt.

0805

2.0±0.3

1.25±0.2

0.6

0.3±0.15

0.9 min

0.3±0.1

0.009

1206

3.2±0.4

1.6±0.2

0.7

0.4±0.2

1.7 min

0.4±0.15

0.020

2010

5.1±0.3

2.5±0.2

0.8

0.6±0.3

3.0 min

0.6±0.25

0.036

2512

6.5±0.3

3.2±0.2

0.8

0.6±0.3

4.4 min

0.6±0.25

0.055

T

W

A

A

B

L

Wrap-around terminations

(3 faces)

*Recommended minimum pad & adjacent trace area for each termination for rated power dissipation on FR4 PCB

Welwyn Components

Welwyn Components