EU
RoHS
本产品目录中记载的产品规格如有变更，恕不一一奉告。订购以及使用之前，请仔细确认规格表的内容。
用于车载设备、医疗设备、航空设备以及其它涉及人身安全、或可能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能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
低功率型电阻器
Low Power Type Resistors
CARBON FILM
CF 小型涂层绝缘型碳膜固定电阻器
Coat-Insulated Fixed Carbon Film Resistors
外观颜色：CFS1/4象牙白色 其他威尼斯红色
Coating color：CFS1/4-Ivory Others-venetian red
表示：颜色代码 Marking : Color code
■ 特点 Features
z通用型引线型电阻器。
z可以自动插入。
z有多种加工成型类型。
z在相同功率下，比贴片电阻更能耐受脉冲。
z同样有1/4W的小型电阻器（CFS 1/4）。
z对应欧盟RoHS的。
zGeneral-purpose lead-type resistors.
zAutomatic insertion is applicable.
zVarious types of formings are available.
zStronger in pulse resistance than chip resistors of the same power.
zThe smaller type of 1/4W(CFS 1/4) is available.
zProducts meet EU-RoHS requirements.
■ 参考标准 Reference Standards
IEC 60115-2
JIS C 5201-2
EIAJ RC-2136
■ 结构图 Construction
ʗ װ Marking ʛ ݢসġġġġġġġġġ Electrode cap
ʘ ુኒညل Insulation coating
ʙ
ʚ
ʜ ܷღġġġ Lead wire
ݲᏟღġġġġġġġġġġġġġġġġġġġ
ġġġ
Trimming line
ʝ ݢᏟಡġġġ Resistive film
࿂ۦᄣ Ceramic core
ʗ ʘ ʙ ʚ ʛ
ʜ
ʝ
D
C
L
d
TT
■ 外形尺寸 Dimensions
型号
Type
尺寸 Dimensions （mm）Weight (g)
(1000pcs)
L C Max. D d (Nominal)
※3
Standard Long
CFS1/4 3.2±0.2 3.4 1.7 +0.2
–0.1 0.45 14 min.※120 min.※280
CF1/4 6.1±0.5 7.1 2.3±0.3 0.6 160
CFS1/2 6.3±0.5 7.1 2.85±0.3 0.6 20 min. －290
CFB1/2 9.0±1.0 11.0 3.5±0.5 0.7 －520
※1 成型编码S可以对应盒装。 ※3 引线长度按照成型和编带的不同而改变。
※1
Forming code S is applied for bulk type. ※3 Lead length changes depending on taping and forming type.
※2 Long对应定制产品。
※2 Long type is custom-made.
■ 品名构成 Type Designation
实例 Example
CF 1/4 103
൰፯
Product
Code
࢞څݢᏟፎ
Nominal
Resistance
3 digits
Ꮯፎኧᅒُ
Resistance
Tolerance
G:±2%
J :±5%
߇ށ࢙ఋ
Power
Rating
S1/4 : 0.25W
1/4 : 0.25W
B1/2 : 0.5W
S1/2 : 0.5W
ߗ۫ৠ
Taping &
Forming
دጐ༧
See table
below
JT52
ޤᏊװಅإ፣
Terminal
Surface Material
C : SnCu
C
֡Ꭷ
Packaging
A :
AMMO
֡Ꭷ
A : AMMO
R :
શ
R : REEL
ૼଽ
:
ძᏊ
Nil : BOX
A
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。
编带细节请参考卷末附录C。
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.
■ 二次加工对应表 Taping & Forming Matrix
型号
Type
直型
Straight
轴向编带
Axial Taping
径向编带
Radial T
aping
U成形
U Forming
M成形
M Forming
S无符号 Nil T26 T52 VT MT MHT VTP VTE U UCL M5 M10 M12.5 M12.5
CFS 1/4 ○※1 ○※2○○○○○ – – ○– M5F – – –
CF 1/4 ○※1 ○※2○○○ – – ○ ○ –○– M10H M12.5H –
CFS 1/2 –○○○○ – – ○○○ – – M10H – –
CFB 1/2 –○–○––––––––––M12.5K
■ 额定值 Ratings
型 号
Type
额定功率
Power
Rating
电阻值范围
Resistance Range（Ω）（E24）
电阻温度系数
T.C.R.（×10-6/K）
最高使用电压
Max. Working
Voltage
最高过载电压
Max. Overload
Voltage
耐电压
Dielectric
Withstanding Voltage
编带和包装数/AMMO包装
Taping & Q'ty/AMMO (pcs)
G: ±2% J:±5%
＋350～－450
0～－700 0～－1000 0～－1300 T26A T52A
CFS 1/4 0.25W 10～330k 2.2～1M 2.2Ω～47kΩ
51kΩ～100kΩ110kΩ～330kΩ
360kΩ～1MΩ250V 500V 300V 5,000 3,000
CF 1/4 0.25W
10～1M
2.2～5.1M
2.2Ω～100kΩ110kΩ～330kΩ
360kΩ～1MΩ
1.1MΩ～5.1MΩ
300V 600V 500V 2,000 2,000CFS 1/2 0.5W 1.0～5.1M 1.0Ω～91kΩ100kΩ～1MΩ
1.1MΩ～2.2MΩ2.4MΩ～5.1MΩ
350V 700V 700V
CFB 1/2 0.5W 2.2～5.1M
2.2Ω～100kΩ
110kΩ～1MΩ
1.1MΩ～2.2MΩ2.4MΩ～5.1MΩ
400V 800V –
额定环境温度 Rated Ambient Temperature ：+70℃
使用温度范围 Operating Temperature Range：-55℃～+155℃
额定电压是
√
额定功率×公称电阻值所算出的值或表中最高使用电压两者中小的值成为额定电压。
Rated voltage =
√
Power Rating×Resistance value or Max. working voltage, whichever is lower.
Nov. 2018
本产品目录中记载的产品规格如有变更，恕不一一奉告。订购以及使用之前，请仔细确认规格表的内容。
用于车载设备、医疗设备、航空设备以及其它涉及人身安全、或可能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能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
低功率型电阻器
Low Power Type Resistors
■ 负荷减轻特性曲线 Derating Curve
-60 -40 -20 0 20 40 60 80 100 120 140 160
5510755-
100
80
60
40
20
0
Percent rated power
߇ށ࢙ఋ˄ˁ˅
ၫޡ Ambient temperature˄ŰġC˅
■ 表面温度上升 Surface Temperature Rise
60
50
40
30
20
10
0
߇ށ࢙ఋఋ Power Rating Ratio˄ˁ˅
װಅၫޡຢ໐˄Ɇ˅
Surface temp. rise
0 25 50 75
CFS1/2
CFB1/2
CF1/4
CFS1/4
100
在环境温度70℃以上使用时，应按照左图负荷减轻特性曲线，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 left derating curve.
■ 耐久性（额定负载） Load Life At 70℃1000Hr
+2
+1
0
-1
-2
ݢᏟፎ Resistance˄Ϯ˅
10 100 1k 10k 100k 1M
CFS1/4
R/R
˄ˁ˅
■ 性能 Performance
试验项目
Test Items
标准值 Performance Requirements
ΔR±（％＋0.05 Ω）试验方法
Test Methods
保证值 Limit 代表值 Typical
电阻值
Resistance
在规定的允许偏差内
Within specified tolerance –测定位置距离本体10mm±1mm
Measuring points are at 10mm±1mm from the end cap.
电阻温度系数
T.C.R.
在规定值以内
Within specified T.C.R. –＋25℃/＋125℃
过载（短时间）
Overload（Short time）1 0.5
额定电压×2.5倍或者最高过载电压，取两者中低的一方施加5秒
Rated voltage×2.5 or Max. overload vol., whichever is lower, for
5s.
耐焊接热
Resistance to soldering heat 1 0.5 260℃±5℃, 10s±1s
端子强度
Terminal strength
不应出现导线外露，端子松弛的情况
No lead-coming off and loose
terminals
– Twist 360°, 5 times
温度突变
Rapid change of temperature 1 0.5 －55℃（30min.）/＋125℃（30min.）5 cycles
耐湿负荷
Moisture resistance 5 2.5 40℃±2℃, 90%～95%RH, 1000h
1.5小时ON、0.5小时OFF的周期 1.5h ON/0.5h OFF cycle
在70℃时的耐久性
Endurance at 70℃3 1.5 70℃±2℃, 1000h
1.5小时ON、0.5小时OFF的周期 1.5h ON/0.5h OFF cycle
■ 使用注意事项 Precautions for Use
z助焊剂等在本产品和安装的印刷电路板上附着离子性杂质时，其耐湿性•耐腐蚀性将受到影响。助焊剂内有时含有氯•酸等离子性物质，为除去这
些离子性物质应进行清洗。特别是使用无铅助焊剂时，由于湿润性提高了，有时会含有大量离子性物质，所以在使用RMA系的焊锡或助焊剂时，
应充分进行清洗。并且，保管环境和安装条件、环境等，附着了汗•盐等离子性物质时，其耐湿性•耐腐蚀性也将受到影响。对于这种污染，为了
除去这些离子性物质，应当进行清洗。
zIonic impurities such as flux etc. that are attached to these products or those mounted onto a PCB, negatively affect their moisture resistance, corrosion
resistance, etc. The flux may contain ionic substances like chlorine, acid, etc. Please wash them to get rid of these ionic substances especially when using lead-
free solder that may contain much of the said substances for improving a wetting characteristic. Using RMA solder or RMA flux, or well-washing is needed.
Also, attaching ionic substances such as perspiration, salt etc. by storage environments or mounting conditions/environments negatively affects their moisture
resistance, corrosion resistance etc. Please wash them to remove the ionic substances when they are polluted.
Nov. 2018
