Pulse Withstanding
Chip Resistors
Welwyn Components
PWC Series
Excellent pulse withstand performance
Improved working voltage
Improved power rating
Standard chip sizes (0805 to 2512)
Custom designs available
Electrical Data
Size
0805
Power @70°C
0.125
W
Resistance range
1206
0.33
Ohms
Tolerance
ppm/°C
Operating temperature
150
1.5
200
400
500
<10R:200 10R:100
°C
Thermal Impedance
0.75
10R to 1M: 0.5, All values: 1, 5
V
TCR
2512
1R0 to 10M
%
LEV
2010
-55 to +155
°C/W
160
80
50
mm 2
Pad / trace area*
220
40
50
60
100
Values
E24 or E96 preferred other values to special order
Pulse capability
See graphs - full application note available on request
*Recommended minimum pad & adjacent trace area for each termination for rated power dissipation on FR4 PCB
Physical Data
Dimensions of PWC resistors are given below in mm and weight in g
L
0805
W
T max
A
B
C
Wt.
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
A
B
L
A
W
Wrap-around terminations
(3 faces)
Construction
Marking
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.
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.
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
07. 08
37
