WK73
wide terminal type flat chip resistors
applications and ratings
Power
Rating
@ 70°C
T.C.R.
(ppm/°C)
Max.
Resistance Range
Maximum
Working
Voltage
Maximum
Overload
Voltage
Operating
Temperature
Range
Part
Designation
E-24
E-24
(J 5ꢀ)
(F 1ꢀ)
—
10m - 27m
800
WK73S2B
200
100
100
30m - 390m
430m - 9.1
10 - 3.3k
30m - 390m
430m - 9.1
10 - 3.3k
0.75W
200V
400V
WK73R2B
WK73R2B*
100
800
200
100
100
3.6k - 1M
—
3.6k - 1M
10m - 24m
27m - 200m
220m - 9.1
27m - 200m
220m - 9.1
WK73S2H
WK73R2H
1.0W
1.0W
200V
200V
400V
400V
10 - 430k
470k - 1M
—
10 - 430k
470k - 1M
10m - 30m
-55°C
to
+155°C
200
800
200
33m - 220m
240m - 9.1
10 - 510k
560k - 1M
—
33m - 220m
240m - 9.1
10 - 510k
1.0W
1.0W
WK73S2J
WK73R2J
100
100
560k - 1M
10m - 20m
200
800
300
22m - 30m
33m - 330m
360m - 9.1
10 - 330k
22m - 30m
33m - 330m
360m - 9.1
10 - 330k
1.5W
1.5W
WK73S3A
200
100
100
200
200V
400V
WK73R3A
360k - 1M
360k - 1M
* Under Development.
environmental applications
Performance Characteristics
Requirement ∆ R
Parameter
Resistance
Limit
Typical
Test Method
Within specified
tolerance
—
25°C
+25°C/-55°C and +25°C/+125°C
Within specified
T.C.R.
T.C.R.
—
Overload (Short time)
Resistance to Solder Heat
Bending Test
2%
1%
0.2%
0.2%
0.1%
0.1%
0.2%
0.2%
Rated Voltage x 2.5 for 5 seconds
260°C 5°C, 10 seconds 1 second
1%
Holding point 90mm, Bending 1 time, Bending 5mm
-55°C (30 minutes), +155°C (30 minutes), 5 cycles
Rapid Change of Temperature
Moisture Resistance
Endurance at 70°C
0.5%
2%
40°C 2°C, 90%-95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
70°C 2°C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
2%
High Temperature
Exposure
1%
0.2%
+155°C, 1000 hours
Additional environmental applications can also be found at www.koaspeer.com
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
12/16/08
31
KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
KOA [ KOA SPEER ELECTRONICS, INC. ]
