The PTC heating element is also called a PTC heater, and is composed of a PTC ceramic heating element and an aluminum tube. This type of PTC heating element has the advantages of small thermal resistance and high heat exchange efficiency, an....
Most of the existing heaters are heated by conventional devices such as electric heating tubes and electric heating wires. The outer casing of the electric heating pipe is a steel pipe made of stainless steel, and has a heating element resis....
1. Scope of application: The WMZ12A PTC thermistor is mainly used for overcurrent protection of [transformer (adapter) / primary coil / charger / digital multimeter / smart meter / micro motor / transistor]. Directly connected in series in....
WMZ12A (II) is mainly used for lightning protection, communication machine over-current protection Other electrical performance parameters: Power frequency resistance: 3Arms 220Vrms 20TImes Lightning strike resistance: 10/310s 1.5KV37.5A 10....
1. Scope of application: WMZ11A PTC thermistor is used in various fluorescent electronic ballasts and electronic energy-saving lamps without changing the wiring. The appropriate thermistor can be directly connected across the resonant capac....
Rated zero power resistor R25 Zero power resistance refers to the very low power consumption added to PTC thermistor when measuring PTC thermistor value at a certain temperature, so that the change of resistance value of PTC thermistor cause....
1. PTC thermistor for temperature compensation and current limiting The shape of the thermistor is shown in the figure, and the main characteristic parameters are shown in the table. 2.MZ2 type energy-saving lamp soft starter thermistor The....
White LEDs are voltage sensitive devices. In actual work, the current is 20 mA, but the current is often increased due to various reasons in use. If no protective measures are taken, the LED will be damaged after the increased current exceed....
Working Principle of Overcurrent Protection Circuit When the circuit is in normal state, the current of PTC thermistor for over-current protection is less than the rated current, and the PTC thermistor for over-current protection is in norm....
Current Detection Using Current Sensor The working principle of the overcurrent detection sensor is shown in Figure 1. The converter secondary current obtained by the converter is converted to a voltage by I/V. After the voltage is DC, the....