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| 型号： | CSR1206FKR250 |
| 厂商： | Stackpole Electronics Inc |
| 文件页数： | 6/6页 |
| 文件大小： | 0K |
| 描述： | RES 0.25OHM 1/2W 1% 1206 SMD |
| 产品培训模块： | Current Sensing Resistor |
| 产品变化通告： | Global Part Number Change 9/Aug/2010 |
| 产品目录绘图： | CSR, CSRN Series Footprint CSR, CSRN Series |
| 标准包装： | 1 |
| 系列： | CSR |
| 电阻（欧姆）： | 0.25 |
| 功率（瓦特）： | 0.5W，1/2W |
| 复合体： | 厚膜 |
| 特点： | 电流检测 |
| 温度系数： | ±100ppm/°C |
| 容差： | ±1% |
| 封装/外壳： | 1206（3216 公制） |
| 尺寸/尺寸： | 0.120" L x 0.061" W（3.05mm x 1.55mm） |
| 高度： | 0.026"（0.65mm） |
| 端子数： | 2 |
| 包装： | 标准包装 |
| 产品目录页面： | 2288 (CN2011-ZH PDF) |
| 其它名称： | CSR1/20.251%IDKR CSR1/20.251%IDKR-ND CSR1/20.25FIDKR CSR1/20.25FIDKR-ND CSR1206FKR250DKR |
CSR/CSRN Series
Thick Film Current Sensing Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
High Power Chip Resistors and Thermal Management
Stackpole has developed several surface mount resistor series in addition to our current sense resistors,
which have had higher power ratings than standard resistor chips. This has caused some uncertainty and
even confusion by users as to how to reliably use these resistors at the higher power ratings in their designs.
The data sheets for the RHC, RMCP, RNCP, CSR, CSRN, CSRF, CSS, and CSSH state that the rated
power assumes an ambient temperature of no more than 100 degrees C for the CSS / CSSH series and 70
degrees C for all other high power resistor series. In addition, IPC and UL best practices dictate that the
combined temperature on any resistor due to power dissipated and ambient air shall be no more than 105C.
At first glance this wouldn’t seem too difficult, however the graph below shows typical heat rise for the CSR
? 100 milliohm at full rated power. The heat rise for the RMCP and RNCP would be similar. The RHC with
its unique materials, design, and processes would have less heat rise and therefore would be easier to
implement for any given customer.
The 102 degrees C heat rise shown here would indicate there will be additional thermal reduction techniques
needed to keep this part under 105C total hot spot temperature if this part is to be used at 0.75 watts of
power. However, this same part at the usual power rating for this size would have a heat rise of around 72
degrees C. This additional heat rise may be dealt with using wider conductor traces, larger solder pads and
land patterns under the solder mask, heavier copper in the conductors, vias through PCB, air movement, and
heat sinks, among many other techniques. Because of the variety of methods customers can use to lower
the effective heat rise of the circuit, resistor manufacturers simply specify power ratings with the limitations
on ambient air temperature and total hot spot temperatures and leave the details of how to best accomplish
this to the design engineers. Design guidelines for products in various market segments can vary widely so
it would be unnecessarily constraining for a resistor manufacturer to recommend the use of any of these
methods over another.
Note:
The final resistance value can be affected by the board layout and assembly process, especially the size of the
mounting pads and the amount of solder used. This is especially notable for resistance values ≤ 50 m .
This should be taken into account when designing.
Rev Date: 11/05/2012
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
6
www.seielect.com
marketing@seielect.com
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| CSR1206FKR300 | 功能描述:RES 0.3OHM 1/2W 1% 1206 SMD RoHS:是 类别:电阻器 >> 芯片电阻 - 表面安装 系列:CSR 产品培训模块:RNCP Series Thin Film Resistors 产品变化通告:Global Part Number Change 9/Aug/2010 产品目录绘图:RNCP Series 特色产品:RNCP Series High Power Thin Film Resistors 标准包装:1 系列:RNCP 电阻（欧姆）:2.74k 功率（瓦特）:0.125W，1/8W 复合体:薄膜 特点:抗硫化 温度系数:±100ppm/°C 容差:±1% 封装/外壳:0603（1608 公制） 尺寸/尺寸:0.059" L x 0.031" W（1.50mm x 0.80mm） 高度:0.020"（0.50mm） 端子数:2 包装:剪切带 (CT) 产品目录页面:2287 (CN2011-ZH PDF) 其它名称:RNCP0603FTD2K74CTRNCP0603T12.74KFRCTRNCP0603T12.74KFRCT-ND |
| CSR1206FKR330 | 功能描述:RES .33OHM 1/2W 1% 1206 SMD RoHS:是 类别:电阻器 >> 芯片电阻 - 表面安装 系列:CSR 产品培训模块:RNCP Series Thin Film Resistors 产品变化通告:Global Part Number Change 9/Aug/2010 产品目录绘图:RNCP Series 特色产品:RNCP Series High Power Thin Film Resistors 标准包装:1 系列:RNCP 电阻（欧姆）:2.74k 功率（瓦特）:0.125W，1/8W 复合体:薄膜 特点:抗硫化 温度系数:±100ppm/°C 容差:±1% 封装/外壳:0603（1608 公制） 尺寸/尺寸:0.059" L x 0.031" W（1.50mm x 0.80mm） 高度:0.020"（0.50mm） 端子数:2 包装:剪切带 (CT) 产品目录页面:2287 (CN2011-ZH PDF) 其它名称:RNCP0603FTD2K74CTRNCP0603T12.74KFRCTRNCP0603T12.74KFRCT-ND |
| CSR1206FKR365 | 功能描述:RES .365 OHM 1/2W 1% 1206 SMD RoHS:是 类别:电阻器 >> 芯片电阻 - 表面安装 系列:CSR 产品变化通告:Global Part Number Change 9/Aug/2010 标准包装:5,000 系列:RNCF 电阻（欧姆）:10k 功率（瓦特）:0.1W，1/10W 复合体:薄膜 特点:- 温度系数:±25ppm/°C 容差:±0.1% 封装/外壳:0805（2012 公制） 尺寸/尺寸:0.079" L x 0.049" W（2.00mm x 1.25mm） 高度:0.026"（0.65mm） 端子数:2 包装:带卷 (TR) 其它名称:RNCF 20 T9 10K 0.1% RRNCF20T910K0.1%RRNCF20T910K0.1%R-NDRNCF20T910KBR |
| CSR1206FKR400 | 功能描述:RES .4 OHM 1/2W 1% 1206 SMD RoHS:是 类别:电阻器 >> 芯片电阻 - 表面安装 系列:CSR 产品变化通告:Global Part Number Change 9/Aug/2010 标准包装:5,000 系列:RNCF 电阻（欧姆）:10k 功率（瓦特）:0.1W，1/10W 复合体:薄膜 特点:- 温度系数:±25ppm/°C 容差:±0.1% 封装/外壳:0805（2012 公制） 尺寸/尺寸:0.079" L x 0.049" W（2.00mm x 1.25mm） 高度:0.026"（0.65mm） 端子数:2 包装:带卷 (TR) 其它名称:RNCF 20 T9 10K 0.1% RRNCF20T910K0.1%RRNCF20T910K0.1%R-NDRNCF20T910KBR |
| CSR1206FKR500 | 功能描述:RES 0.5OHM 1/2W 1% 1206 SMD RoHS:是 类别:电阻器 >> 芯片电阻 - 表面安装 系列:CSR 产品培训模块:Current Sensing Resistor 产品变化通告:Global Part Number Change 9/Aug/2010 产品目录绘图:CSR, CSRN Series Footprint CSR, CSRN Series 标准包装:1,000 系列:CSR 电阻（欧姆）:0.2 功率（瓦特）:0.25W，1/4W 复合体:厚膜 特点:电流检测 温度系数:±200ppm/°C 容差:±1% 封装/外壳:0805（2012 公制） 尺寸/尺寸:0.079" L x 0.049" W（2.00mm x 1.25mm） 高度:0.026"（0.65mm） 端子数:2 包装:带卷 (TR) 产品目录页面:2288 (CN2011-ZH PDF) 其它名称:CSR 1/4 0.2 1% ICSR0805FKR200TRCSR1/40.21%ICSR1/40.21%I-NDCSR1/40.2FICSR1/40.2FI-NDCSR1/40.2FITRCSR1/40.2FITR-ND |
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