PRODUCT BULLETIN
WILLOW TECHNOLOGIES LTD.
SHAWLANDS COURT, NEWCHAPEL ROAD
LINGFIELD, SURREY, RH7 6BL, ENGLAND
Tel. + 44 (0) 1342 835234 Fax. + 44 (0) 1342 834306
E-mail rob@willow.co.uk
WW-SERIES
FLAMEPROOF WIREWOUND RESISTORS
Website http://www.willow.co.uk
1 TO 10 WATT
0.1% THRU 10% TOLERANCE
SILICONE COATED
HIGH PURITY CERAMIC CORE
STAINLESS STEEL END CAPS
TINNED COPPER-CLAD STEEL LEADS
WELDED CONSTRUCTION
PACKAGED TAPE & REEL OR BULK
AVAILABLE IN NON-INDUCTIVE STYLE
MEETS REQUIREMENTS FOR MIL-R-26
Specifications
PRP
Style
Wattage
Voltage
Resistance
Range
U
V
1.0
U
V
WW1/2
WW1
WW2
WW3
WW4
WW5
WW7
WW10
.75
0.1
to 5.23K
to 5.0K
to 7.2K
to 9.5K
32
44
1.0
2.0
1.5
0.1
.02
.01
0.1
.01
0.1
0.1
44
54
77
2.6
65
3.0
3.6
130
147
250
410
530
700
4.0
5.0
to 14.0K 210
to 42.0K 360
to 63.0K 490
to 92.0K 632
5.0
6.5
7.0
8.0
10.0
11.0
1.375" Min.
L
Dimensions
d
DIMENSIONS Inches
D
PRP
Style
L
D
Lead Dia. (d)
.025 *
.025 *
.032
Dimensional
Correlation
WW1/2
WW1
WW2
WW3
WW4
WW5
WW7
WW10
.266 ± .015
.400 ± .030
.460 ± .030
.490 ± .030
.550 ± .030
.910 ± .030
1.250 ± .060
1.750 ± .060
.095 ± .015
.100 ± .030
.175 ± .030
.210 ± .030
.220 ± .030
.295 ± .030
.295 ± .030
.295 ± .030
in.
mm
.032
.015
.020
.025
.030
.032
0.38
0.5
.032
0.64
0.76
0.81
.032
.032
.060
.095
1.52
2.41
.032
*
ALSO AVAILABLE IN .020
.100
.175
.210
.220
.266
.295
.400
.460
.490
.550
.910
1.25
1.75
2.54
4.45
5.33
5.59
6.76
7.49
10.2
11.7
12.4
14.0
23.1
31.8
44.5
Temperature
TC20 = ±20PPM/°C, 10 ohm and above.
TC50 = ±50PPM/°C, 1 ohm - 9.9 ohm.
TC90 = ±90PPM/°C, below 1 ohm.
How to Order
Sample Part Number
7.5K ±1%
S
WW1 TC20
S = Standard
Options
N = Non-Inductive
Resistance Tolerance
Resistance Value
Temperature Coefficient
Type
Subject to change without notice
Continued on reverse side
DEDICATION TO EXCELLENCE
