WK73
resistors
c
L
c
UNDER
DEVELOP.
wide terminal type flat chip resistors
EU
features
•
Flat chip resistors of wide terminal type
•
High reliability and performance with T.C.R.
±100 x 10
-6
/K, resistance tolerance ±1%
•
Marking: Black protective coat
•
Products with lead-free terminations meet EU RoHS
requirements. Pb located in glass material, electrode
and resistor element is exempt per Annex 1, exemption
5 of EU directive 2005/95/EC
dimensions and construction
Type
(Inch Size Code)
L
Dimensions
inches
(mm)
W
c
d
t
W
2B
(0612)
2H
(1020)
2J
(1218)
3A
(1225)
.063±.006 .126±.006 .012±.008 .018±.006
(1.6±0.15) (3.2±0.15) (0.3±0.2) (0.45±0.15)
.098±.006 .197±.006 .016±.008
(2.5±0.15) (5.0±0.15) (0.4±0.2)
.122±.006 .181±.006 .016±.008 .030±.006
(3.1±0.15) (4.6±0.15) (0.4±0.2) (0.75±0.15)
.122±.006 .252±.006 .018±.008
(3.1±0.15) (6.4±0.15) (0.45±0.2)
t
d
Inner
Resistive Electrode
Film
Solder
Plating
Ni
Plating
.024±.004
(0.6±0.1)
Protective
Coating Ceramic
Substrate
Derating Curve
100
80
% Rated Power
60
40
20
0
-60 -40 -20
-55
0
80 100 120 140 160
70
155
Ambient Temperature
(°C)
20
40
60
ordering information
New Part #
WK73S
Type
WK73S
WK73R
2J
Size
2B: 0.75W
2H: 1W
2J: 1W
3A: 1.5W
T
Termination
Material
T: Sn
TE
Packaging
TD: 0612: 7" 2mm pitch
punched paper
TDD: 0612 10" paper tape
TE: 1020, 1218, 1225:
7" punched plastic
TED: 1020, 1218, 1225:
10" punched plastic
For further information on
packaging, please refer
to Appendix A
33L0
Nominal
Resistance
±1%: 3 significant
figures + 1 multiplier
“R” indicates decimal
on value <100Ω
±5%: 2 significant
figures + 1 multiplier
“R” indicates decimal
on values <10Ω
All values less than 0.1Ω
(100mΩ) are expressed in
mΩ with “L” as decimal.
Ex: 33mΩ, 1% = 33L0
F
Resistance
Tolerance
F: ±1%
J: ±5%
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
11/07/08
30
KOA Speer Electronics, Inc.
• 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
PMS 300 neg.
Black neg.
WK73
applications and ratings
Part
Designation
Power
Rating
@ 70°C
T.C.R.
(ppm/°C)
Max.
±800
±200
wide terminal type flat chip resistors
Resistance Range
E-24
(F±1%)
—
30m - 390m
430m - 9.1
10 - 3.3k
3.6k - 1M
—
27m - 200m
220m - 9.1
10 - 430k
470k - 1M
—
33m - 220m
240m - 9.1
10 - 510k
560k - 1M
—
22m - 30m
33m - 330m
360m - 9.1
10 - 330k
360k - 1M
E-24
(J±5%)
10m - 27m
30m - 390m
430m - 9.1
10 - 3.3k
3.6k - 1M
10m - 24m
27m - 200m
220m - 9.1
10 - 430k
470k - 1M
10m - 30m
33m - 220m
240m - 9.1
10 - 510k
560k - 1M
10m - 20m
22m - 30m
33m - 330m
360m - 9.1
10 - 330k
360k - 1M
Maximum
Working
Voltage
Maximum
Overload
Voltage
Operating
Temperature
Range
WK73S2B
0.75W
WK73R2B
WK73R2B*
WK73S2H
WK73R2H
WK73S2J
WK73R2J
1.0W
1.0W
1.0W
1.0W
±100
±100
±100
±800
±200
±100
±100
±200
±800
±200
±100
±100
±200
±800
±300
±200
±100
±100
±200
200V
400V
200V
400V
-55°C
to
+155°C
200V
400V
WK73S3A
1.5W
200V
400V
WK73R3A
* Under Development.
1.5W
environmental applications
Performance Characteristics
Parameter
Resistance
T.C.R.
Overload (Short time)
Resistance to Solder Heat
Bending Test
Rapid Change of Temperature
Moisture Resistance
Endurance at 70°C
High Temperature
Exposure
Requirement
Limit
Within specified
tolerance
Within specified
T.C.R.
±2%
±1%
±1%
±0.5%
±2%
±2%
±1%
∆
R
Typical
—
—
±0.2%
±0.2%
±0.1%
±0.1%
±0.2%
±0.2%
±0.2%
25°C
+25°C/-55°C and +25°C/+125°C
Rated Voltage x 2.5 for 5 seconds
260°C ± 5°C, 10 seconds ± 1 second
Holding point 90mm, Bending 1 time, Bending 5mm
-55°C (30 minutes), +155°C (30 minutes), 5 cycles
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
+155°C, 1000 hours
Test Method
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
KOA Speer Electronics, Inc.
• 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
31
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