外观
常见电阻电容值列举
在PCB项目原理图设计过程中,由于分压、谐振等各种电路组合,可能会用到许许多多不同阻值、不同容值的阻容,在选择阻容的时候,不能完全以计算值为准,同时也要考虑库存、价格、精度等因素,当遇到没有计算值时,通常会使用不同值并联或者串联来达到接近计算值的效果。
电阻
0R | 1R | 1.5R | 2R | 2.2R | 2.4R | 2.7R | 3R | 3.3R | 3.6R |
---|---|---|---|---|---|---|---|---|---|
3.9R | 4.3R | 4.7R | 5.1R | 5.6R | 6.2R | 6.8R | 7.5R | 8.2R | 9.1R |
10R | 12R | 15R | 18R | 20R | 22R | 24R | 27R | 30R | 33R |
36R | 39R | 43R | 47R | 51R | 56R | 62R | 68R | 75R | 82R |
91R | 100R | 120R | 150R | 180R | 200R | 220R | 240R | 270R | 300R |
330R | 360R | 390R | 430R | 470R | 510R | 560R | 620R | 680R | 750R |
820R | 910R | 1K | 1.2K | 1.5K | 1.8K | 2K | 2.2K | 2.4K | 2.7K |
3K | 3.3K | 3.6K | 3.9K | 4.3K | 4.7K | 5.1K | 5.6K | 6.2K | 6.8K |
7.5K | 8.2K | 9.1K | 10K | 12K | 15K | 18K | 20K | 22K | 24K |
27K | 30K | 32K | 36K | 39K | 43K | 47K | 51K | 56K | 62K |
68K | 75K | 82K | 91K | 100K | 120K | 150K | 180K | 200K | 220K |
240K | 270K | 300K | 330K | 360K | 390K | 430K | 470K | 510K | 560K |
620K | 680K | 750K | 820K | 910K | 1M | 3.3M | 4.7M | 10M | 12M |
电容
1pF | 1.2pF | 1.8pF | 2pF | 2.2pF | 2.4pF | 2.5pF | 2.7pF | 3pF | 3.3pF |
---|---|---|---|---|---|---|---|---|---|
3.6pF | 3.9pF | 4.3pF | 4.7pF | 5pF | 5.6pF | 6pF | 6.2pF | 6.8pF | 7pF |
8pF | 8.2pF | 9pF | 10pF | 11pF | 12pF | 13pF | 15pF | 16pF | 18pF |
20pF | 22pF | 24pF | 25pF | 27pF | 30pF | 33pF | 36pF | 39pF | 43pF |
47pF | 50pF | 51pF | 56pF | 68pF | 75pF | 82pF | 91pF | 100pF | 120pF |
150pF | 180pF | 200pF | 220pF | 270pF | 300pF | 330pF | 360pF | 390pF | 430pF |
470pF | 500pF | 510pF | 560pF | 680pF | 820pF | 1nF | 1.2nF | 1.5nF | 1.8nF |
2nF | 2.2nF | 2.7nF | 3nF | 3.3nF | 3.9nF | 4.7nF | 5.1nF | 5.6nF | 6.8nF |
7.5nF | 8.2nF | 9.1nF | 10nF | 12nF | 15nF | 18nF | 20nF | 22nF | 27nF |
33nF | 39nF | 47nF | 56nF | 68nF | 100nF | 150nF | 220nF | 330nF | 470nF |
680nF | 1uF | 1.5uF | 2.2uF | 3.3uF | 4.7uF | 6.8uF | 10uF | 15uF | 22uF |
33uF | 47uF | 68uF | 100uF | 150uF | 220uF | 330uF | 470uF | 680uF | 1000uF |
该表格并不完整,仅供参考,,实际使用时还需结合实际商城或供货商是否有库存进行综合参考,同时,在dcdc等反馈电阻中,部分值通常是带小数点的,这些不建议大家使用多个电阻组合,就算要用也推荐至少是百分之一精度,否则会严重影响输出精度,对于这些计算值,计算公式都大差不差,用的多了目前很多也是逐渐沦为常用料了,只要不是输出一些不寻常的值,一般都是有电阻可以直接选择使用的。