WK73-RT Datasheet, PDF (1/2 Pages) KOA Speer Electronics, Inc. – wide terminal type flat chip resistors

WK73-RT
wide terminal type flat chip resistors
(anti sulfuration)
EU
features
• Anti-sulfuration type, wide-side termination
(reverse-geometry)type flat chip resistor
• Excellent anti-sulfuration characteristic due to using
high sulfuration-proof inner top electrode material
• Suitable for both flow and reflow solderings
• Marking: Black coating color
• This products meet EU RoHS requirements.
EU RoHS regulation is not intended for Pb-glass
contained in electrode, resistor element and glass.
• AEC-Q200 Qualified
dimensions and construction
L
c
c
W
Ceramic Substrate
Sn Plating
t
Ni Plating
d
Protective
Coating
Resistive
Film
Inner
Electrode
Type
Dimensions inches (mm)
(Inch Size Code)
L
W
c
d
t
2B
(0612)
2H
(1020)
+.004
+.004
.063±-.008 .126± -.012 .012±.008 .018±.006
(1.6± -+00.2.1⁾ (3.2±^+-00..31)
(0.3±0.2) (0.45±0.15)
.024±.004
+.004
+.004
.098± -.008 .197± -.008 .016±.008 .030±.006
(0.6±0.1)
(2.5±^+-00..21) (5.0±^{+-00..21) (0.4±0.2) (0.75±0.15)}
2J
(1218)
3A
(1225)
+.004
+.004
.122±-.008 .181± -.008 .016±.008 .030±.006
(3.1± -+00.2.1⁾ (4.6±^+-00..21)
(0.4±0.2) (0.75±0.15)
.024±.004
+.008
.122± -.004 .248±.006 .018±.008 .030±.006
(0.6±0.1)
(3.1±^{+-00..12) (6.3±0.15) (0.45±0.2) (0.75±0.15)}
Derating Curve
100
80
WK73S2B (1W), WK73S/R3A (2W)
100
100
3A (90°C)
2H, 2J (100°C)
3A (90°C)
80
2B (105°C)
80
2B (105°C)
60
60
60
40
40
40
20
20
20
0
-60 -40 -20
-55
0 20 40 60 80 100 120 140 160
70
155
Ambient Temperature
(°C)
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
-60 -40 -20
-55
0 20 40 60 80 100 120 140 160
90 105
155
Terminal Part Temperature
(°C)
0
-60 -40 -20
-55
0 20 40 60 80 100 120 140 160
90 105
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” on the beginning of our catalog before use.
ordering information
New Part #
WK73R
R2B
RT
TD
10R0
F
Type
Size
Termination
Material
Packaging
Nominal
Resistance*
Resistance
Tolerance
WK73S
R2B: 0.75W
RT : Sn
TD: 4mm pitch punched paper
±1%: 4 digits
F: ±1%
WK73R
S2B: 1W
TE: 4mm pitch embossed plastic
±5%: 3 digits
J: ±5%
* Resistance value, 3 digits:
1~9.1Ω, 1R0~9R1
Resistance value, 4 digits:
1~9.76Ω, 1R00~9R76
2H: 1W
NEW 2J: 1W
NEW 3A: 2W
For further information on
packaging, please refer
to Appendix A
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
8/17/15
26 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: [phone] • www.koaspeer.com