description: Have you ever needed a simple, low-cost latch circuit? Figure 1 shows a circuit that provides power failure protection for a few dollars of components, basically a silicon controlled rectifier (SCR) that combines discrete components. Both transistors are normally off. To turn on the latch, you need to drive the PNP base low or drive the NPN base high until one of the transistors turns on. This will create a collector current that will turn on the other transistor, further turning on the initial transistor. The circuit performs a latch operation in a regenerative manner. Current is limited only by the source impedance and transistor characteristics, allowing the circuit to quickly discharge the capacitor. See the PDF for the full text! KNB1-32 Miniature Circuit Breaker
KNB1-32 Mini Circuit breakers, also named as the air switch which have a short for arc extinguishing device. It is a switch role, and also is a automatic protection of low-voltage electrical distribution. Its role is equivalent to the combination of switch. Fuse. Thermal Relay and other electrical components. It mainly used for short circuit and overload protection. Generally, According to the poles, mini Circuit breaker can be divided into 1P , 1P+N , 2P, 3P and 4P.
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