Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
KOA SPEER ELECTRONICS, INC.
4. Standard Applications
Part
Designation*
SR731H
(0201)
SR731E
(0402)
SR731J
(0603)
Power
Rating
@ 70°C
0.1W
1/6W (.166W)
1/5W (.2W)
1/3W (.33W)
SR732A
(0805)
1/2W (.5W
1
)
1/3W (.33W)
SR732B
(1206)
1/2W (.5W
1
)
1/2W (.5W)
SR732E
(1210)
2/3W (.66W )
1
SS-239 R9
Rated
Rated
T.C.R.
Ambient Terminal (ppm/°C)
Temp. Part Temp.
Max.
70°C
70°C
70°C
70°C
––
—
125°C
125°C
125°C
105°C
125°C
110°C
125°C
110°C
125°C
125°C
0 - ±400
0 - ±500
±200
±300
±500
±200
±100
±200
±500
±800
±100
±200
±500
±800
±100
±200
±500
±800
±100
±200
±500
±800
±100
±200
±500
±1000
±100
±200
±500
±800
±100
±200
±500
±800
±100
±200
±500
±800
Resistance Range
E-24, E-96 E-24, E-96
(F±1%)
(D±0.5%)
—
—
—
—
—
0.15Ω - 10Ω
—
—
—
0.15Ω - 10Ω
—
—
—
0.15Ω - 10Ω
—
—
—
0.15Ω - 10Ω
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
1Ω - 10Ω**
—
0.51Ω - 10Ω**
0.2Ω - 0.47Ω**
0.1Ω - 0.18Ω**
0.1Ω - 10Ω
0.1Ω - 10Ω
—
—
—
0.1Ω - 10Ω
—
—
—
0.1Ω - 10Ω
—
—
—
0.1Ω - 10Ω
—
—
—
0.1Ω - 10Ω
—
—
—
0.1Ω - 10Ω
—
—
—
0.1Ω - 10Ω
—
—
—
0.1Ω - 10Ω
—
—
—
E-24
(G±2%)
—
0.51Ω - 10Ω
0.2Ω - 0.47Ω
0.1Ω - 0.18Ω
0.1Ω - 10Ω
—
0.1Ω - 10Ω
—
—
—
0.1Ω - 10Ω
—
—
—
0.1Ω - 10Ω
—
—
—
0.1Ω - 10Ω
—
—
—
0.1Ω - 10Ω
—
—
—
0.1Ω - 10Ω
—
—
—
0.1Ω - 10Ω
—
—
—
0.1Ω - 10Ω
—
—
E-24
(J±5%)
0.27Ω - 10Ω
0.18Ω - 0.24Ω
0.51Ω - 10Ω
0.2Ω - 0.47Ω
0.1Ω - 0.18Ω
0.1Ω - 10Ω
—
0.1Ω - 10Ω
0.051Ω - 0.091Ω
0.030Ω - 0.047Ω
—
0.1Ω - 10Ω
0.051Ω - 0.091Ω
0.030Ω - 0.047Ω
—
0.1Ω - 10Ω
0.056Ω - 0.091Ω
0.030Ω - 0.051Ω
—
0.1Ω - 10Ω
0.056Ω - 0.091Ω
0.030Ω - 0.051Ω
—
0.047Ω - 10Ω
0.036Ω - 0.043Ω
0.024Ω - 0.033Ω
—
0.047Ω - 10Ω
0.036Ω - 0.043Ω
0.024Ω - 0.033Ω
—
0.1Ω - 10Ω
0.056Ω - 0.091Ω
0.033Ω - 0.051Ω
—
0.1Ω - 10Ω
0.056Ω - 0.091Ω
0.039Ω - 0.051Ω
Absolute Maximum
Maximum Overload
Working
Voltage
Voltage
(5 Secs. Max.)
1.0V
1.11V
1.41V
2.5V
2.79V
3.53V
1.58V
3.95V
70°C
––
70°C
––
1.81V
4.54V
2.23V
5.59V
SR732H/W2H
(2010)
SR733A/W3A
(2512)
3/4W (.75W)
1W
70°C
70°C
2.73V
3.16V
6.84V
7.90V
* Parentheses indicate EIA package size codes.
** 1H, 1E (F: ±1%) E-24 values only.
Operating Temp: -55C to +125°C (SR731H only), -55°C to +150°C
If any questions should arise whether to use the “Rated Ambient Temperature” or the “Rated Terminal Part Temperature,” please give priority to the “Rated Terminal
Part Temperature.” Prior to use and for more details refer to “Introduction of the derating curves on the terminal part temperature” in the beginning of the catalog.
1
Prior to use, refer to the “Higher Power Ratings” in the beginning of catalog.
Derating Curve
5. Rating
SR73 2A (0.5W), SR73 2B (0.5W), SR73 2E (0.66W)
For resistors operated at an ambient temperature
of 70°C or above, a power rating shall be derated
in accordance with the derating curve.
For resistors operated at a terminal part 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.
PAGE 2 OF 6
Bolivar Drive
I
P.O. Box 547
I
Bradford, PA 16701
I
USA
I
814-362-5536
I
Fax 814-362-8883
I
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.
KOA SPEER ELECTRONICS, INC.
5-2 Voltage Rating
Resistors shall have a rated direct-current (DC)
continuous working voltage or approximate
sine-wave root-mean-square (RMS) continuous
working voltage at commercial-line frequency
and waveform corresponding to the power rating,
as determined from the following formula:
Where:
E = Rated voltage (V)
P x R P = Rated power (W)
R = Nominal resistance (Ω)
SS-239 R9
E=
√
In no case shall be rated DC or R.M.S. continuous
working voltage be greater than the applicable
maximum value.
6. Body and Marking
Type
SR73
SR73
Tolerance
D (±0.5%)
F (±1%)
G (±2%)
J (±5%)
Coating
Color
Indigo
Indigo
Marking
Color
White/ 4 digit
White/ 3 digit
Marking: a effective number and a multiplier. R means a decimal point.
7. Marking Method
D, F
4 digit
This character indicate
Ω
unit and
express 4 effective numbers.
R means a decimal point.
This character indicate
Ω
unit and
express 3 effective numbers.
R means a decimal point.
3 Digit
4 Digit
R20
0.2
W
R200
G, J
3 digit
4R7
4.7
W
4R70
PAGE 3 OF 6
Bolivar Drive
I
P.O. Box 547
I
Bradford, PA 16701
I
USA
I
814-362-5536
I
Fax 814-362-8883
I
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.
Arm 生态系统正推动 AI 突破云端边界，深度融入真实物理世界 随着 CES 2026 在本周登场，一条贯穿全场的脉络迅速显现：人们所见、所触、所体验的大多数技术与产品，均已构建在 Arm 技术之上。基于 Arm 技术的平台正在为各类产品和技术演示提供核心算力支撑——从在复杂环境中自主行驶的智能汽车，到能够与人类自然交互的机器人，再到融合数字世界与现实空间的沉浸式扩展现实 (...[详细]
Waymo发布了一篇技术文章《Demonstrably Safe AI For Autonomous Driving》，随着Uber带着全球的Robtaxi探讨“能力”“规模”“商业化”的时候，Waymo 要开始重点强调“可验证的安全”？ 为什么它已经累计行驶超过 1 亿英里、并在真实运营中显著降低事故率，却依然要拆开系统、公开其 AI 架构细节？理解这些问题，其实是要解决Waymo和特斯拉...[详细]
下载中心专版
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
