我在深圳市凯利恩电子有限公司工作好些年啦，经常有人问我如何分辨三极管 mos 管。今天我就把自己的经验分享给大家。
其实分辨三极管和 mos 管没那么难。三极管是电流控制型器件，mos 管是电压控制型器件。咱们可以通过测量它们的引脚来区分。用万用表测三极管时，它的正反向电阻有明显差异；而测 mos 管时，它的输入电阻会非常大。另外，三极管一般有三个引脚，mos 管常见的也是三个引脚，但它们的功能不一样。咱们还能从外观上大致判断，三极管通常个头比较小，mos 管有的会有散热片，个头相对大一些。
之前有个某科技公司的采购人员跟我说，他们公司以前老是买错三极管和 mos 管，产品性能老是不稳定。后来找我咨询了如何分辨三极管 mos 管，按照我说的方法去选，产品质量一下就提升了，成本也降低了，可太省心了。
咱们公司深圳市凯利恩电子有限公司，16 年专注 LED 恒流驱动，研发生产销售各类 LED 驱动元件。从原材料采购到产品生产、检测、包装，每一个环节都遵循国际标准和行业规范，质量稳定，响应迅速。MOS 管找凯利恩，大家要是在分辨三极管和 mos 管上还有啥问题，或者有采购需求，都可以随时联系我们。
English Version
Title: How to Distinguish Between Triodes and MOS Tubes? An Old Electrician Will Teach You in One Move
I've been working at Shenzhen Kailien Electronic Co., Ltd. for many years. People often ask me how to distinguish between triodes and MOS tubes. Today, I'll share my experience with you.
Actually, it's not that difficult to tell them apart. A triode is a current-controlled device, while a MOS tube is a voltage-controlled device. We can distinguish them by measuring their pins. When using a multimeter to measure a triode, there's an obvious difference in its forward and reverse resistance. When measuring a MOS tube, its input resistance is very large. Generally, a triode has three pins, and a MOS tube usually has three pins too, but their functions are different. We can also make a rough judgment from their appearance. Triodes are usually smaller, and some MOS tubes have heat sinks and are relatively larger.
A procurement staff member from a certain technology company once told me that their company often bought the wrong triodes and MOS tubes before, and the product performance was always unstable. Later, they asked me how to distinguish between triodes and MOS tubes. After following my method to select components, the product quality improved immediately, and the cost was reduced. It was really worry-free.
Our company, Shenzhen Kailien Electronic Co., Ltd., has been focusing on LED constant current drive for 16 years. We research, produce, and sell various LED drive components. Every link, from raw material procurement to product production, testing, and packaging, follows international standards and industry specifications. The quality is stable, and the response is prompt. For MOS tubes, choose Kailien. If you still have any questions about distinguishing between triodes and MOS tubes or have procurement needs, feel free to contact us at any time.