resistors
RK73-RT
flat chip resistors (anti-sulfuration)
EU
features
• 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
• 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 Tested: 0201 (1H), 0402 (1E), 0603 (1J),
0805 (2A), 1206 (2B), 1210 (2E), 2010 (W2H), 2512 (W3A)
dimensions and construction
L
c
Type
L
1F
(01005)
.016±.001
(0.4±0.02)
.008±.001
(0.2±0.02)
.004±.001
(0.1±0.03)
.004±.001
(0.11±0.03)
1H
(0201)
.024±.001
(0.6±0.03)
.012±.001
(0.3±0.03)
.004±.002
(0.1±0.05)
.006±.002 .009±.001
(0.15±0.05) (0.23±0.03)
1E
(0402)
.039
+.004
-.002
+0.1 )
-0.05
.02±.002
(0.5±0.05)
.008±.004
(0.2±0.1)
+.002
-.004
(0.25 +0.05
-0.1 )
.014±.002
(0.35±0.05)
1J
(0603)
.063±.008
(1.6±0.2)
.031±.004
(0.8±0.1)
.012±.004
(0.3±0.1)
.012±.004
(0.3±0.1)
.018±.004
(0.45±0.1)
2A
(0805)
.079±.008
(2.0±0.2)
.049±.004
(1.25±0.1)
.016±.008
(0.4±0.2)
.012
c
W
Sn
Plating
Ni
Plating
t
d
Protective
Coating
Dimensions inches (mm)
W
c
d
(Inch Size
Code)
Resistive Inner
Film
Electrode
Ceramic
Substrate
2B
(1206)
2E
(1210)
1
(1.0
.126±.008
(3.2±0.2)
.063±.008
(1.6±0.2)
.197±.008
(5.0±0.2)
.098±.008
(2.5±0.2)
W3A/
W3A21
(2512)
.248±.008
(6.3±0.2)
.122±.008
(3.1±0.2)
(0.3
.016
(0.4
.102±.008
(2.6±0.2)
W2H
(2010)
.01
.02±.012
(0.5±0.3)
+.008
-.004
+0.2 )
-0.1
t
.005±.001
(0.13±0.02)
.02±.004
(0.5±0.1)
+.008
-.004
+0.2 )
-0.1
.026±.006
(0.65±0.15)
.024±.004
(0.6±0.1)
RK73Z exempt
ordering information
RK73H
Type
RK73B
RK73H
RK73Z
2A
Power
Rating
1F
1H
1E
1J
2A
2B
2E
W2H
W3A
W3A2
R
Characteristic
R: Anti-Sulfur
T
TD
Termination
Material
T: Sn
Packaging
TX: 4mm width - 1mm pitch plastic embossed
TBL - TCM: 2mm pitch press paper *2
TPL - TP: 2mm pitch punch paper
TD: 4mm pitch punch paper
TE: 4mm pitch plastic embossed
For further information on packaging, please refer
to Appendix A
2
1002
F
Nominal
Resistance
RK73B:
3 digits
RK73H:
4 digits
RK73Z:
None
Resistance
Tolerance
D: ±0.5%
F: ±1%
G: ±2%
J: ±5%
Standard taping specification of 1H is TCM.
Previously available “TC (10,000pcs/Reel)”
is not recommended for new designs.
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
50
5/17/23
KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
flat chip resistors (anti-sulfuration)
applications and ratings
RK73B/RK73H
Part
Designation
1F
1H
1E
1J
2A
2B
Rated
Rated
T.C.R.
Terminal
Power
(ppm/°C)
Ambient
Part
Rating
Max.
Temp.
Temp.
±200
±250
––
0.03W
0 - +300
±200
0.05W
±300
±100
0.1W
±200
±100
0.1W
±200
±100
0.125W
±200
±100
125°C
70°C
0.25W
±200
±100
0.25W
±200
2E
0.5W
W2H
0.75W
W3A
1W
W3A2
2W4
Resistance Range
Maximum Maximum Operating
RK73H
RK73B
Working Overload
Temp.
D±0.5%
G±2%
J±5%
F±1%
Voltage
Voltage
Range
3
E24, E96
E24
E24
E24, E96
100kΩ - 2MΩ2 100kΩ - 1MΩ 100kΩ - 10MΩ
-55°C
to
––
10Ω - 91kΩ2 10Ω - 91kΩ 10Ω - 91kΩ
20V
30V
+125°C
1Ω - 9.1Ω
1Ω - 9.1Ω
––
100 - 1M
100Ω - 100kΩ 100Ω - 1MΩ
25V
50V
––
––
10Ω - 91Ω
10Ω - 97.6Ω
—
—
100Ω - 1MΩ 10Ω - 1MΩ
––
1.02MΩ - 10MΩ 10Ω - 10MΩ 1Ω - 10MΩ
1.02kΩ - 1MΩ 1.02kΩ - 1MΩ
—
—
75V
100V
––
1.02MΩ - 10MΩ 1.1kΩ - 10MΩ 1.1kΩ - 10MΩ
—
—
100Ω - 1kΩ 10Ω - 1kΩ
10Ω - 1kΩ
1Ω - 1kΩ
––
––
100Ω - 1MΩ 10Ω - 1MΩ
—
—
150V
200V
—
1.02MΩ - 10MΩ 10Ω - 10MΩ 1Ω - 10MΩ
-55°C
100Ω - 1MΩ 10Ω - 1MΩ
—
—
to
—
1.02MΩ - 10MΩ 10Ω - 10MΩ 1Ω - 10MΩ
+155°C
100Ω - 1MΩ 10Ω - 1MΩ
—
—
—
—
10Ω - 1MΩ 1Ω - 1MΩ
10Ω - 1MΩ 10Ω - 1MΩ
—
—
1 - 9.76
200V
400V
—
1.02MΩ - 10MΩ 1Ω - 10MΩ 1Ω - 10MΩ
10Ω - 1MΩ 10Ω - 1MΩ
—
—
±100
±200
±100
±200
95°C
±100
±200
±100
±200
—
1.02MΩ - 10MΩ 10Ω - 10MΩ 1Ω - 10MΩ
10Ω - 1MΩ 10Ω - 1MΩ
—
—
—
1.02MΩ - 10MΩ 10Ω - 10MΩ 1Ω - 10MΩ
Rated voltage = √Power rating x resistance value or max. working voltage, whichever is lower
The nominal resistance value for RK73H1F (F:±1%) is E24
If you use at the rated power, please keep the condition that the terminal of the resistor is below the rated terminal part temperature. Please refer to
the derating curves based on the terminal temperature.
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 refer to “Introduction of the derating curves in the terminal
part temperature” in the beginning of the catalog.
While using under high power, the temperature of the product may increase depending on the condition of heat dissipation from PCB.
Be sure to check the terminal part temperature as well as precautions to use on delivery specification before use.
3
4
Derating Curve
80
1F
1H, 1E, 1J, 2A, 2B,
2E, W2H, W3A (1W),
W3A2 (2W)
60
40
20
0
-60 -40
-55
-20
0
20
40
60
80
70
Ambient Temperature
(°C)
100 120
140
125
155
For resistors operated at an ambient temperature
of 70℃ or higher, the power (for RK73B, RK73H)
or a current rating (for RK73Z) shall be derated in
accordance with the above derating curve.
100
100
80
80
1H, 1E, 1J, 2A, 2B, 2E,
W2H, W3A (1W)
60
40
60
40
20
20
0
-60 -40
-55
% Rated Power
100
RK73B-RK73H-RT
Terminal Part Temperature W3A2
RK73B-RK73H-RK73Z-RT
Terminal Part Temperature
% Rated Power for RK73B, RK73H
% Rated Current for RK73Z
% Rated Power for RK73B, RK73H
% Rated Current for RK73Z
RK73B-RK73H-RK73Z-RT
Ambient Temperature
-20
0
100 120
140 160
125
155
Terminal Part Temperature
(°C)
20
40
60
80
0
-60 -40
-55
-20
0
20
40
60
80
100 120 140 160
95
155
Terminal Part Temperature
(°C)
When the terminal part temperature of the resistor exceeds the rated terminal part temperature
shown above, the power shall be derated according to the derating curve.
Please refer to “Introduction of the derating curves based on the terminal part temperature” on
the beginning of our catalog before use.
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
5/17/23
KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
51
resistors
RK73-RT
resistors
RK73-RT
flat chip resistors (anti-sulfuration)
applications and ratings (continued)
RK73Z
Part
Designation
Rated
Ambient
Temperature
Rated
Terminal Part
Temperature
1H
1E
1J
2A
2B
2E
W2H
+70°C
Resistance
Current
Rating
Maximum
Surge
Current
100mΩ max.
0.5A
1A
1A
2A
5A
+125°C
50mΩ max.
2A
Operating
Temperature
Range
-55°C to +155°C
10A
W3A
environmental applications
Performance Characteristics
Parameter
Resistance
T.C.R.
Overload (Short time)
RK73H, RK73B Requirement Δ R
±(%+0.1Ω)
Limit
Typical
Within specified
—
tolerance
Within specified
—
T.C.R.
±2%
RK73Z Requirement
Limit
Test Method
Typical
R≤100mΩ: 1H
R≤90mΩ: 1H
R≤50mΩ: All others R≤40mΩ: All others 25°C
—
—
+25°C/-55°C and +25°C/+125°C
RK73B, RK73H Rated Voltage x 2.5 for 5 seconds
R≤100mΩ: 1H
R≤90mΩ: 1H
±1%: 1F
(1E, 2B, W3A2: Rated Voltage x 2 for 5 seconds)
±0.8%: All others R≤50mΩ: All others R≤40mΩ: All others RK73Z: Max. overload current for 5 seconds
Resistance to
Solder Heat
±1%:10Ω≤R≤1MΩ
±1%: R1MΩ
±0.5%: All others
Rapid Change
of Temperature
±1%: 1F
±0.5%: All others
Moisture Resistance
±2%: 1J, 2A, 2B
±3%: All others
Endurance at 70°C
±2%: 1J, 2A, 2B
±3%: All others
High Temperature
Exposure
±1%
Sulfuration Test
±5%
R≤100mΩ: 1H
R≤90mΩ: 1H
±0.5%: 1F
±0.3%: All others R≤50mΩ: All others R≤40mΩ: All others -55°C (30 minutes), +125°C (30 minutes), 100 cycles
±0.75%: 1J, 2A, 2B
R≤150mΩ: 1H
R≤100mΩ: 1H
40°C ± 2°C, 90%-95% RH, 1000 hours,
±1.5%: 1F
R≤100mΩ: All others R≤50mΩ: All others 1.5 hr ON, 0.5 hr OFF cycle
±1%: All others
R≤150mΩ: 1H
R≤100mΩ: 1H
±0.75%: 1J, 2A, 2B
±1%: All others R≤100mΩ: All others R≤50mΩ: All others 70°C ± 2°C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
R≤150mΩ: 1H
R≤100mΩ: 1H
+125°C, 1000 hours: 1F; +155°C, 1000 hours:
±0.5%
R≤100mΩ: All others R≤50mΩ: All others 1H, 1E, 1J, 2A, 2B, 2E, W2H, W3A
R≤100mΩ: 1H
±0.3%: 1F, 1H
Soaked in industrial oil with 3.5% sulfur
R≤150mΩ: 1H
±0.2%: All others R≤100mΩ: All others R≤50mΩ: All others concentration 105°C ± 3°C, 500 hours
Please refer to conventional products for characteristic data such as temperature rise.
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
52
11/06/19
KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com