THICK FILM
矩½片式电阻器
Flat Chip Resistors
(
PRECISION
)
■ 结构图
Construction
L
c
c
EU
RoHS
RK73H
矩½片式电阻器（精密级）
Flat Chip Resistors (Precision Grade)
W
t
d
外观颜色： 黑色（1F、1H）
蓝色（1E、1J、2A、2B、2E、W2H、W3A、
W3A2）
Coating color：Black（1F, 1H）,
Blue（1E, 1J, 2A, 2B, 2E, W2H, W3A,
W3A2）
Protective coating
Resistive film
Inner electrode
Ni plating
Solder plating
Ceramic substrate
■ 外½尺寸
Dimensions
型号
Type
(Inch Size Code)
1F
（01005）
1H
（0201）
1E
（0402）
1J
（0603）
2A
（0805）
2B
（1206）
2E
（1210）
W2H
※1
（2010）
W3A
※1
（2512）
W3A2
※1
（2512）
L
0.4±0.02
0.6±0.03
1.0
+0.1
–0.05
1.6±0.2
2.0±0.2
尺寸
W
0.2±0.02
0.3±0.03
0.5±0.05
0.8±0.1
1.25±0.1
1.6±0.2
3.2±0.2
2.6±0.2
5.0±0.2
2.5±0.2
0.5±0.3
0.65±0.15
6.3±0.2
3.1±0.2
37.1
0.6±0.1
0.4
+0.2
–0.1
■ 特点
Features
z
小型、½量。
z
由于电阻保护膜½用了金属釉厚膜，因此耐热性、耐
候性优异。
z
电极为三层结构，具有稳定性和高信赖性。
z
对应编带、散装箱方式等各种自动贴装机。
z
对应回流焊、波峰焊。
z
端子无铅品，符合欧盟RoHS。电极、电阻膜层、玻璃
中所含的铅玻璃不适用欧盟RoHS指令。
z
AEC-Q200相关数据已取得(除1F)。
z
Small size and light weight.
z
Excellent heat resistance and weather resistance are ensured
by the use of metal glaze thick film.
z
High stability and high reliability with the triple-layer
structure of electrode.
z
Applicable to various kinds of automatic mounters for taping, etc.
z
Suitable for both flow and reflow solderings.
z
Products with lead free termination meet EU-RoHS
requirements. EU-RoHS regulation is not intended for Pb-
glass contained in electrode, resistor element and glass.
z
AEC-Q200 qualified (Exemption 1F).
Dimensions
（mm）
c
d
0.10±0.03
0.1±0.05
0.2±0.1
0.3±0.1
0.4±0.2
0.11±0.03
0.15±0.05
0.25
+0.05
–0.1
0.3±0.1
0.3
+0.2
–0.1
t
0.13±0.02
0.23±0.03
0.35±0.05
0.45±0.1
0.5±0.1
Weight (g)
(1000pcs)
0.04
0.14
0.68
2.14
4.54
9.14
15.5
24.3
※1 也对应RK73H
2H・3A・3A2 (“d”尺寸不同。
“d”尺寸＝0.4
+0.2
mm)
–0.1
※1
RK73H 2H, 3A and 3A2 are also still available (different“d”dimensions=0.4
+0.2
mm)
–0.1
■ 品名构成
Type Designation
实例
RK73H
品种
Product
Code
■ 负荷减½特性曲线
环境温度
1002
F
阻值允许偏差
Resistance
Tolerance
D: ±0.5%
F: ±1%
Derating Curve
端子部温度
Terminal part temperature
100
Percent rated power
Example
2B
额定功率
Power
Rating
T
端子表面材质
Terminal
Surface Material
TD
二次加工
Taping
公称电阻值
Nominal
Resistance
4 digits
Ambient temperature
100
80
60
40
20
0
-60 -40
-55
Percent rated power
1F
1H,1E,1J,2A,2B
2E,W2H,W3A(1W)
端子部温度
Terminal part temperature
RK73H W3A2
100
Percent rated power
80
60
40
20
0
-60 -40
-55
80
60
40
20
0
-60 -40
-55
1H,1E,1J,2A,2B,2E,
W2H,W3A(1W)
1F: 0.03W
1H: 0.05W
1E: 0.1W
1J : 0.1W
0.125Ｗ
2A: 0.25Ｗ
2B: 0.25W
2E: 0.5W
W2H: 0.75W
W3A: 1W
W3A2: 2W
TX：4mm width-
T: Sn
1mm pitch plastic
G: Au
※2
embossed
（L:
Sn/Pb
※3
）
TBL・TC・TCM：
2mm pitch
press paper
TPL・TP：
2mm pitch
punch paper
TD：4mm pitch
punch paper
TE：4mm pitch
plastic
embossed
BK：Bulk
-20
0
20
40
60
80
100 120 140 160
125
155
-20
0
20
40
60
80
100 120 140 160
125
155
-20
0
20
40
60
80
100 120 140 160
155
70
Ambient temperature
70
Terminal part temperature
95
Terminal part temperature
※2
镀金电极，有1E、1J、2A（10Ω½1MΩ）对应
由于规格不同，请向本公司咨询。
※3
1F、1H、W2H、W3A、W3A2尺寸只对应端子表面材质T。
※2
Products with gold plated electrodes are also available with 1E, 1J
and 2A types (10Ω½1MΩ), so please consult with us.
※3
With type 1F, 1H, W2H, W3A, W3A2 only T is available as the
terminal surface material.
端子表面材质，以无铅品为准。
欲知关于此产品含有的环境负荷物质详情（除EU-RoHS以外），
请与我们联系。
编带细节参照卷末附½C。
The terminal surface material lead free is standard.
Contact us when you have control request for environmental hazardous
material other than the substance specified by EU-RoHS.
For further information on taping, please refer to APPENDIX C on the
back pages.
在环境温度70℃以上½用
时，应按照上图负荷减½特
性曲线，减小额定功率。
For resistors operated at an
ambient temperature of 70ºC or
above, a power rating shall be
derated in accordance with the
above derating curve.
超过上述端子部温度½用时，请根据负荷减½特性曲线减小额
定功率后½用。
※ 关于½用方法，请参照卷首的“端子部温度负荷减½特性曲
线的说明”。
For resistors operated terminal part temperature of described for
each size or above, a power rating shall be derated in accordance
with derating curve.
※
Please refer to“Introduction of the derating curves based on the
terminal part temperature” on the beginning of our catalog before
use.
■ 参考标准
Reference Standards
IEC 60115-8
JIS C 5201-8
EIAJ RC-2134C
Nov. 2018
本产品目½中记½½的产品规格如有变更，恕不一一奉告。订购以及½用之前，请仔细确认规格表的内容。
用于½½½设备、医疗设备、航空设备以及其它涉及人身安全、或可½引起重大损失的设备上时，请务必事先与我公司联系。这些产品在这类用途中出现故障或失灵可½导致人身事故或严重损坏。
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
Contact our sales representatives before you use our products for applications including automotives, medical equipment and aerospace equipment.
Malfunction or failure of the products in such applications may cause loss of human life or serious damage.
www.koaglobal.com
■ 额定值
Ratings
电阻值范围
额定
额定
电阻温度
额定功率
Resistance Range（Ω）
环境温度
端子部温度
系数
型 号
Power
Type
Rated Ambient Rated Terminal T.C.R.
D:±0.5%
F:±1%
Rating
Temp.
Part Temp. (×10
-6
/K) E24・E96
E24・E96
1F
0.03W
70℃
—
±200
±250
±200
±400
±100
—
最高
½用电压
Max.
Working
Voltage
最高
过½½电压
Max.
Overload
Voltage
二次加工和包装数量/卷
Packaging & Q'ty/Reel（pcs）
TX
TBL
TC • TCM TPL • TP
TD
TE
矩½片式电阻器
Flat Chip Resistors
100k½2M
※4
—
—
—
—
20V
30V
40,000 20,000
10½91k
※4
10½1M 10½10M
※4
TC
：
10,000
—
—
—
—
—
1H
0.05W
70℃
125℃
25V
50V
※4
TCM
：
15,000
—
1½9.1
10½1M
10½1M
TPL
：
20,000
—
—
—
—
—
1E
0.1W
70℃
125℃
1½9.76
TP
：
10,000
±200
—
1.02M½10M
±100
1.02k½1M 1.02k½1M
75V
100V
0.1W
±200
—
1.02M½10M
—
—
—
—
1J
70℃
125℃
TP
：
10,000 5,000
±100
10½1k
10½1k
0.125W
±200
—
1½9.76
±100
10½1M
10½1M
±200
—
—
—
1½9.76
TP
：
10,000 5,000
4,000
2A
0.25W
70℃
125℃
150V
200V
—
±400
1.02M½10M
±100
10½1M
10½1M
1½9.76
±200
—
—
—
—
2B
0.25W
70℃
125℃
5,000
4,000
1.02M½5.6M
—
±400
5.62M½10M
±100
10½1M
10½1M
1½9.76
±200
—
—
—
—
200V
400V
2E
0.5W
70℃
125℃
5,000
4,000
1.02M½5.6M
—
±400
5.62M½10M
±100
10½1M
10½1M
1½9.76
±200
—
—
—
—
—
W2H
0.75W
70℃
125℃
4,000
1.02M½5.6M
—
±400
5.62M½10M
±100
10½1M
10½1M
1½9.76
—
—
—
—
—
W3A
1W
70℃
125℃
200V
400V
4,000
±200
1.02M½5.6M
—
±400
5.62M½10M
±100
10½1M
10½1M
1½9.76
—
±200
—
—
—
—
—
W3A2
2W
95℃
200V
400V
4,000
1.02M½5.6M
—
±400
5.62M½10M
½用温度范围
Operating Temperature Range：-55℃½+125℃（1F），-55℃½+155℃（1H•1E•1J•2A•2B•2E•W2H•W3A•W3A2）
额定电压是
√
额定功率×公称电阻值所算出的值或表中最高½用电压两者中小的值为额定电压。
Rated voltage =
√
Power Rating×Resistance value or Max. working voltage, whichever is lower.
跳线片式电阻器请参照RK73Z系列。
For flat chip jumper resistor, please refer to RK73Z series.
※4
RK73H1F（F：±1％）及RK73H1H（1Ω≤R≤9.1Ω，1MΩ≤R≤10MΩ）的公称阻值为E24。
※4
The nominal resistance value for RK73H1F (F：±1%) and RK73H1H（1Ω≤R≤9.1Ω，1MΩ≤R≤10MΩ) is E24.
根据客户的½用状况，如果不清楚是该½用额定环境温度还是额定端子部温度，请以额定端子部温度为优先。
详情请参照14½17页的“端子部温度负荷特性曲线的说明”。
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”.
For more details, please refer to“Introduction of the derating curves based on the terminal part temperature”in page 14 to 17.
在高功率下½用时，根据基板散热条件的不同，部件温度可½会升高。
请务必在确认端子部温度及产品规格书、½用注意事项后½用。
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 specifications before use.
■ 性½
Performance
试验项目
Test Items
电阻值
Resistance
电阻温度系数
T.C.R.
过½½（短时间）
Overload（Short time）
耐焊接热
Resistance to soldering heat
温度突变
Rapid change of temperature
耐湿负荷
Moisture resistance
在70℃时的耐久性
Endurance at 70℃
高温放½
High temperature exposure
标准值
Performance Requirements
ΔR±（％＋0.1
Ω）
保证值
Limit
代表值
Typical
在规定的允许偏差内
–
Within specified tolerance
在规定值以内
–
Within specified T.C.R.
1：1F
2
0.5：another
1：1F½W3A（10Ω≤R≤1MΩ）
0.5：1F½W3A（10Ω≤R≤1MΩ）
3：1H½W3A（R<10Ω, R>1MΩ） 1：1H½W3A（R<10Ω, R>1MΩ）
1：1F
0.5：1F
0.5：another
0.3：another
0.75：1J, 2A, 2B
2：1J, 2A, 2B
1.5：1F
3：another
1：another
2：1J, 2A, 2B
0.75：1J, 2A, 2B
3：another
1：another
0.5：1F
1
0.3：another
试验方法
Test Methods
25℃
+25℃/-55℃ and +25℃/+125℃
额定电压×2.5倍½加5秒钟（1E,
2B, W3A2：额定电压×2倍）
Rated voltage
×2.5
for 5s（1E, 2B, W3A2：Rated voltage×2 for 5s）
260℃±5℃, 10s±1s
-55℃ (30min.) /+125℃ (30min.) 100 cycles
40℃±2℃, 90%½95%RH, 1000h
1.5小时ON、0.5小时OFF的周期 1.5h ON/0.5h OFF cycle
70℃±2℃, 1000h
1.5小时ON、0.5小时OFF的周期 1.5h ON/0.5h OFF cycle
+125℃, 1000h：1F
+155℃, 1000h：1H,1E, 1J, 2A, 2B, 2E, W2H, W3A, W3A2
■ ½用注意事项
Precautions for Use
z
片状电阻器的基材是氧化铝。由于和安装基板的热膨胀系数不同，在反复½加热循环等热应力时，接合部的焊锡（焊接部）有时会发生龟裂。特别是大型尺寸
W2H/W3A/W3A2，由于热膨胀大，而且本身发热也大，½环境温度变动有较大反复和，½½荷的ON/OFF有反复时，需要注意裂纹的发生。用环氧树脂印刷电路板
（FR-4），在½用温度范围的上、下限进行一般性的热循环试验时，1F½2E的类型不容易发生裂纹，而W2H/W3A/W3A2型则有容易发生裂纹的倾向。因热应力而发
生的龟裂，取决于所安装的焊盘的大小、焊锡量、安装基板的散热性等，因此在环境温度有很大的变化或½½荷ON/OFF的条件下½用时，请充分注意以进行设计。
z
RK73H1F电阻器会因设备组装工序中静电的产生和½加而发生损坏，敬请注意。
z
The substrate of chip resistors is alumina. Cracks may occur at the connection of solder (solder fillet portion) due to the difference of the coefficient of thermal expansion
from amounting board when heat stress like heat cycle, etc. are repeatedly given to them. Care should be taken to the occurrence of the cracks when the change in ambient
temperature or ON/OFF of load is repeated, especially when large types of W2H/W3A/W3A2 which have large thermal expansion and also self heating. By general temperature
cycle test using glass-epoxy (FR-4) boards under the maximum/minimum temperatures of operating temperature range, the crack does not occur easily in the types of 1F½2E,
but the crack tends to occur in the types of W2H/W3A/W3A2. The occurrence of the crack by heat stress may be influenced by the size of a pad, solder volume, heat radiation
of mounting board etc., so please pay careful attention todesigning when a big change in ambient temperature and conditions for use like ON/OFF of load can be assumed.
z
Care should be taken that RK73H1F may be damaged when static electricity occurs and is applied in the equipment.
本产品目½中记½½的产品规格如有变更，恕不一一奉告。订购以及½用之前，请仔细确认规格表的内容。
用于½½½设备、医疗设备、航空设备以及其它涉及人身安全、或可½引起重大损失的设备上时，请务必事先与我公司联系。这些产品在这类用途中出现故障或失灵可½导致人身事故或严重损坏。
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
Contact our sales representatives before you use our products for applications including automotives, medical equipment and aerospace equipment.
Malfunction or failure of the products in such applications may cause loss of human life or serious damage.
Nov. 2018
www.koaglobal.com
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