wide terminal type pulse power
flat chip resistors (anti surge)
EU
features
• Superior to WK73 series in pulse
withstanding voltage
• Suitable for both flow and reflow solderings
• This products meet EU RoHS requirements
• AEC-Q200 Tested
dimensions and construction
L
c
c
Type
L
2B
(0612)
+.004
.063± -.008
+0.1)
(1.6± -0.2
2H
(1020)
.098±.006 .197±.006 .016±.008 .030±.006 .024±.004
(2.5±0.15) (5.0±0.15) (0.4±0.2) (0.75±0.15) (0.6±0.1)
3A
(1225)
.122± -.004
+0.2
(3.1± -0.1 )
W
Ceramic Substrate
Sn Plating
t
Dimensions inches (mm)
W
c
d
(Inch Size Code)
+.004
.126± -.012
+0.1)
(3.2± -0.3
t
.012±.008 .018±.006 .024±.004
(0.3±0.2) (0.45±0.15) (0.6±0.1)
Ni Plating
d
Protective Resistive Inner
Electrode
Coating Film
+.008
.248±.006 .018±.008 .030±.006 .024±.004
(6.3±0.15) (0.45±0.2) (0.75±0.15) (0.6±0.1)
Derating Curve
80
80
% Rated Power
100
% Rated Power
100
60
40
20
60
40
20
0
-60 -40 -20
-55
0
0
-60 -40 -20
-55
80 100 120 140 160
155
70
Ambient Temperature
(°C)
20
40
60
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.
0
20
40
60 80
100 120 140 160
125
155
Terminal Part Temperature
(°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.
Please refer to “Introduction of the derating curve based on the terminal part
temperature” in the beginning of our catalog before use.
ordering information
WG73
Type
2H
T
Power
Rating
2B: 1W
2H: 1.5W
3A: 2W
Termination
Surface Material
T : Sn
TE
Packaging
TD: 4mm pitch punch paper
TE: 4mm pitch embossed plastic
For further information on
packaging, please refer
to Appendix A
101
K
Nominal
Resistance
3 digits
Resistance
Tolerance
K: ±10%
M:±20%
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
10/20/20
KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
35
resistors
WG73
resistors
WG73
wide terminal type pulse power
flat chip resistors (anti surge)
applications and ratings
Part
Designation
Power
Rating
Rated
Ambient
Temperature
Rated
Terminal
Part
Temperature
T.C.R.
(X 10-6/K)
WG732B
1.0W
70°C
±125°C
WG732H
1.5W
70°C
WG733A
2.0W
70°C
Resistance Range (Ω)
Maximum
Working
Voltage
Maximum
Overload
Voltage
Operating
Temperature
Range
K±10%
E-12
M±20%
E-12
±100
560m ~ 1k
560m ~ 1k
200V
400V
-55°C
to
+155°C
±125°C
±100
560m ~ 1k
560m ~ 1k
200V
400V
-55°C
to
+155°C
±125°C
±100
560m ~ 1k
560m ~ 1k
200V
400V
-55°C
to
+155°C
Rated voltage = √Power rating x resistance value or max. working voltage, whichever is lower
If any questions arise whether to use the “Rated Ambient Temperature” or the “Rated Terminal Part Temperature” in your usage conditions,
please give priority to the “Rated Terminal Part Temperature.”
Prior to use and for more details, please refer to the “Introduction of the derating curves based on the terminal part temperature” in the
beginning of our catalog.
environmental applications
Temperature Rise
One-Pulse Limiting Electric Power
WG73 2B-3A
WG73 2B-3A
3A
2H
2H
3A
2B
2B
Temperature Rise (°C)
160
140
120
100
80
Measurement condition
Room temperature: 25°C
PCB: FR-4t = 1.6mm
Cu foil thickness: 35µm
60
①: Hot spot
40
②: Terminal
20
0
20
10
30
40
50
60
70
80
90 100
Power Rating
(%)
One-Pulse Limiting Electric Power
100000
180
10000
1000
100
WG733A
10
WG732H
WG732B
1
.001
.01
.1
1
10
100
1000
Pulse Duration
(ms)
Regarding the temperature rise, the value of the
temperature varies per conditions and board for
use since the temperature is measured under our
measuring conditions.
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 ∆ R ±(%+0.005Ω)
Limit
Typical
Within specified
—
tolerance
Within specified
—
T.C.R.
±2%
±0.2%
±1%
±1%
±0.5%
±2%
±2%
±0.2%
±0.1%
±0.3%
±0.2%
±0.2%
±1%
±0.2%
Test Method
25°C
+25°C/-55°C and +25°C/+125°C
Rated voltage (DC) 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), +125°C (30 minutes), 100 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
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
36
10/20/20
KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
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