26 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • 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. 4/11/16
resistors
features
WK73
high power, wide terminal type flat chip resistors
dimensions and construction
Protective
Coating
Inner
Electrode
Resistive
Film
Ceramic
Substrate
Solder
Plating
Ni
Plating
Lcc
W
t
d
D: ±0.5%
F: ±1%
J: ±5%
T: Sn
±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
2B: 0.75W, 1W
2H: 1W
2J: 1W
3A: 1.5W, 2W
WK73S
WK73R
TD: 0612: 7" 4mm pitch
punched paper
TE: 1020, 1218, 1225:
7" embossed plastic
TED: 1020, 1218, 1225:
10" embossed plastic
For further information on
packaging, please refer
to Appendix A
WK73S
Type Size Nominal
Resistance Resistance
Tolerance
Termination
Material Packaging
New Part # 2J TE 33L0 FT
Type
L
.030±.006
(0.75±0.15)
.024±.004
(0.6±0.1)
.016±.008
(0.4±0.2)
.018±.008
(0.45±0.2)
.252±.006
(6.3±0.15)
.122±.006
(3.1±0.15)
.181±.006
(4.6±0.15)
.122±.006
(3.1±0.15)
2J
(1218)
3A
(1225)
(Inch Size Code) Wc d t
Dimensions inches (mm)
.016±.008
(0.4±0.2)
.197±.006
(5.0±0.15)
.098±.006
(2.5±0.15)
2H
(1020)
.018±.006
(0.45±0.15)
.012±.008
(0.3±0.2)
.126±.006
(3.2±0.2)
.063±.006
(1.6±0.15)
2B
(0612)
ordering information
EU
Derating Curve
% Rated Power
100
80
60
40
20
-60 -40 0 40 60 80100160
70
20
Ambient Te mperature
(°C)
0
-55
120
155
-20 140
For resistors operated at an ambient temperature
of 70°C or above, a power rating shall be derated
in accordance with the above derating curve.
% Rated Power
100
80
60
40
20
-60 -40 0 40 60 80
100
160
90
20
Terminal Part Temperature
(°C)
0
-55
120
155
-20 140
105
2B (105°C)
3A (90°C) 2H, 2J (100°C)
% Rated Power
100
80
60
40
20
-60 -40 0 406080
100
160
90
20
Terminal Part Temperature
(°C)
0
-55
120
155
-20 140
105
2B (105°C)
3A (90°C)
For resistors operated terminal temperature of described for each size or above,
a power rating shall be derated in accordance with the derating curve above.
Please refer to “Introduction of the derating curve based on the terminal part
temperature” on the beginning of our catalog before use.
If you want to use at rated power (*1), use derating curves based on the
terminal part temperature on the right side graph.
• Wide-side termination (reverse-geometry)
type flat chip resistor
• 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. EU RoHS regulation is not intended for
Pb-glass contained in electrode, resistor element and glass.
• AEC-Q200 Qualified: 0612(2B), 1020(2H), 1218(2J), 1225(3A)
WK73S2B (1W), WK73S/R3A (2W)
WK73
high power, wide terminal type flat chip resistors
environmental applications
Maximum
Working
Voltage
F±1%
E-24/E-96 J±5%
E-24
Part
Designation
Maximum
Overload
Voltage
Operating
Temp.
Range
Power
Rating
WK73R2H
WK73S2J
220m - 9.76
432k - 1M
—
27m - 215m
—
200V 400V
200V 400V
200V 400V
±100
1.0W
1.0W
±200
±800
Resistance Range (Ω)
T.C.R.
(X 10-6/K)
-55°C
to
+155°C
10 - 430k
±100
±800
±200
WK73R2J
WK73S3A
240m - 9.76
200V 400V
Rated
Terminal
Part Temp.
100°C
105°C
90°C
Rated
Ambient
Temp.
70°C
100°C70°C
100°C70°C
70°C
105°C70°C
100°C70°C
105°C––
––
90°C––
90°C70°C
90°C70°C
2.0W1
2.0W
±100
33m - 237m
—
22m - 32.4m
511k - 1M
10 - 510k
360m - 9.76
33m - 357m
10 - 330k
332k - 1M
220m - 9.1
470k - 1M
10m - 24m
27m - 200m
10m - 30m
10 - 430k
240m - 9.1
33m - 220m
10m - 20m
22m - 30m
560k - 1M
10 - 510k
360m - 9.1
33m - 330m
10 - 330k
360k - 1M
±200
±800
±300
±100
±200
±200
±100
±100
±200
Performance Characteristics
Parameter
Requirement ∆ R ±(%+0.005Ω)
Limit Typical Test Method
Resistance
T.C.R.
25°C
+25°C/-55°C and +25°C/+125°C
Within specified
tolerance
Within specified
T.C.R.
—
—
Overload (Short time) WK73S2B (1W), WK73S/R3A (2W): Rated voltage x2.0 for 5 seconds
WK7S/R2B, S2H, S/R2H, S/R2J, S/R3A: Rated voltage x2.5 for 3 seconds
±2% ±0.2%
Resistance to Solder Heat 260°C ± 5°C, 10 seconds ± 1 second
±1% ±0.2%
Bending Test Holding point 90mm, Bending 1 time, Bending 5mm
±1% ±0.1%
Rapid Change of Temperature -55°C (30 minutes), +155°C (30 minutes), 5 cycles
±0.5% ±0.1%
Moisture Resistance 40°C ± 2°C, 90%-95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
±2% ±0.2%
Endurance at 70°C 70°C ± 2°C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
±2% ±0.2%
High Temperature
Exposure +155°C, 1000 hours
±2%: WK73S (±5%)
±1%: all others
±0.5%: WK73S (±5%)
±0.2%: all others
WK73S2H 1.0W
1.0W
applications and ratings
430m - 9.76
10 - 1M
±100
±100
430m - 9.1
10 - 1M
—
30m - 422m
±800
±200
10m - 27m
30m - 390m
WK73S2B
WK73R2B
1.0W1
D±0.5%
E-24/E-96
10 - 1M
Additional environmental applications can also be found at www.koaspeer.com
0.75W
—
—
430m - 9.76
430m - 9.76±100 430m - 9.1
—
30m - 422m
±800
±200
10m - 27m
30m - 390m
0.75W
—
—
430m - 9.76
—
—
—
—
—
—
—
—
—
—
1.5W
—
22m - 32.4m
360m - 9.76
33m - 357m
10m - 20m
22m - 30m
360m - 9.1
33m - 330m
±800
±300
±100
±200
—
—
—
—
—
—
WK73R3A
1.5W 10 - 330k
332k - 1M
10 - 330k
360k - 1M
±100
±200
—
—
—
—
—
—
Rated voltage = √Power rating x resistance value or max. working voltage, whichever is lower
1 If you want to use at rated power use derating curves based on the terminal part temperature on the right side graph located on previous page.
If any questions arise whether to use the “Rated Ambient Temperature” or the “Rated Terminal Part Temperature”, please give priority to the
“Rated Terminal Part Temperature.” For more details refer to the “Introduction of the derating curves based on the terminal part temperature”
in the beginning of the catalog
27
KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • 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. 11/03/15
resistors
Mouser Electronics
Authorized Distributor
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WK73R2HTTE20R0F WK73R2HTTE182J WK73R3ATTE220J WK73R3ATTE391J WK73R3ATTE330J
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WK73R2HTTE101J WK73R2HTTE102J WK73R2HTTE103J WK73R2HTTE104J WK73R2HTTE121J
WK73R2HTTE122J WK73R2HTTE132J WK73R2HTTE151J WK73R2HTTE152J WK73R2HTTE10R0F
WK73R3ATTE471J WK73R3ATTE750J WK73R3ATTE102J WK73R3ATTE101J WK73R3ATTE1001F
WK73R2HTTE153J WK73R3ATTE1000F WK73R3ATTE100J WK73R2HTTE202J WK73R3ATTE472J
WK73R2HTTE222J WK73R3ATTE103J WK73R3ATTE911J WK73R2HTTE331J WK73R2HTTE330J
WK73R2HTTE272J WK73R2HTTE242J WK73R3ATTE10R0F WK73R2JTTE363J WK73R2JTTE364J
WK73R2JTTE36R0F WK73R2JTTE3900F WK73R2JTTE3901F WK73R2JTTE3902F WK73R2JTTE3903F
WK73R2JTTE390J WK73R2JTTE391J WK73R2JTTE392J WK73R2JTTE393J WK73R2JTTE394J
WK73R2JTTE39R0F WK73R2JTTE4300F WK73R2JTTE4301F WK73R2JTTE4302F WK73R2JTTE4303F
WK73R2JTTE430J WK73R2JTTE431J WK73R2JTTE432J WK73R2JTTE433J WK73R2JTTE434J
WK73R2JTTE4700F WK73R2JTTE4701F WK73R2JTTE4702F WK73R2JTTE4703F WK73R2JTTE471J
WK73R2JTTE472J WK73R2JTTE473J WK73R2JTTE474J WK73R2JTTE47R0F WK73R2JTTE5100F
WK73R2JTTE5101F WK73R2JTTE5102F WK73R2JTTE5103F WK73R2JTTE510J WK73R2JTTE511J
WK73R2JTTE512J WK73R2JTTE513J WK73R2JTTE514J WK73R2JTTE51R0F WK73R2JTTE5600F
WK73R2JTTE5601F WK73R2JTTE5602F WK73R2JTTE5603F WK73R2JTTE560J WK73R2JTTE561J
WK73R2JTTE562J WK73R2JTTE563J WK73R2JTTE564J WK73R2JTTE56R0F WK73R2JTTE6200F
WK73R2JTTE6201F WK73R2JTTE6202F WK73R2JTTE6203F WK73R2JTTE620J WK73R2JTTE621J
