RK73-RT
flat chip resistors (anti-sulfuration)
features
EU
• Excellent anti-sulfuration characteristic
due to using high sulfuration-proof inner
top electrode material
• Excellent heat resistance and weather
resistance are ensured by the use of metal glaze thick film
• High stability and high reliability with the triple-layer
structure of electrode
• Suitable for both flow and reflow solderings
• Marking: Black protective coat on RK73B, RK73Z1J, 2A,
2B, 2E, W2H, W3A
Blue protective coat on RK73H
Green protective coat on RK73Z1E
• 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
L
c
c
Type
Dimensions inches (mm)
W
(Inch Size Code)
Solder
Plating
L
W
c
d
t
+.004
+.002
Ni
.039
.01
-.004
t
1E
(0402)
-.002
.02 .002 .008 .004
(0.5 0.05) (0.2 0.1)
.014 .002
Plating
(1.0 +0.1
)
(0.25 +0.05
)
(0.35 0.05)
-0.1
Protective
Coating
Resistive Inner
Film Electrode
d
-0.05
1J
(0603)
.063 .008 .031 .004 .012 .004 .012 .004
.018 .004
Ceramic
Substrate
(1.6 0.2)
(0.8 0.1)
(0.3 0.1)
(0.3 0.1) (0.45 0.1)
Derating Curve
100
+.008
.012
2A
(0805)
.079 .008 .049 .004 .016 .008
(2.0 0.2) (1.25 0.1) (0.4 0.2)
-.004
.02 .004
(0.5 0.1)
(0.3 +0.2
)
-0.1
80
2B
.063 .008
+.008
-.004
.016
(1206)
(1.6 0.2)
60
40
.126 .008
(0.4 +0.2
)
(3.2 0.2)
2E
(1210)
.102 .008
(2.6 0.2)
-0.1
.02 .012
(0.5 0.3)
.024 .004
(0.6 0.1)
20
0
W2H
(2010)
.197 .008 .098 .008
(5.0 0.2) (2.5 0.2)
.023 .006
(0.65 0.15)
-60 -40 -20
-55
0
20
40
60
80 100 120
140
155
70
W3A
(2512)
.248 .008 .122 .008
Ambient Temperature
(°C)
(6.3 0.2)
(3.1 0.2)
ordering information
New Part #
RK73H
2A
RT
TD
1002
F
Power
Rating
Termination
Surface Material
Nominal
Resistance
Resistance
Tolerance
Type
Packaging
TPL: 0402 only: 2mm pitch punch paper
RK73B
RK73H
1E
1J
2A
2B
2E
RT: Sn
Anti-Sulfur
RK73B:
3 digits
RK73H:
4 digits
D: 0.5%
F: 1%
G: 2%
J: 5%
TP: 0402, 0603, 0805: 7" 2mm pitch punch paper
TD: 0603, 0805, 1206, 1210:7" 2mm pitch punched paper
TDD: 0603, 0805, 1206, 1210: 10" paper tape
TE: 0805, 1206, 1210, 2010 & 2512: 7" punched plastic
TED: 0805, 1206, 1210, 2010 & 2512: 10" punched plastic
For further information on packaging, please refer to
Appendix A
W2H
W3A
New Part #
RK73Z
Type
2A
RT
TD
Current
Rating
Termination
Surface Material
Packaging
TPL: 0402 only: 2mm pitch punch paper
TP: 0402, 0603, 0805: 7" 2mm pitch punch paper
TD: 0603, 0805, 1206, 1210:7" 2mm pitch punched paper
TDD: 0603, 0805, 1206, 1210: 10" paper tape
1E, 1J: 1A
2A, 2B, 2E,
W2H, W3A
RT: Sn
Anti-Sulfur
TE: 0805, 1206, 1210, 2010 & 2512: 7" punched plastic
TED: 0805, 1206, 1210, 2010 & 2512: 10" punched plastic
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.
10/30/08
14
KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com