Anti-Failure & Superior Stability: MBR10200D Safeguards Inductive Loads

When using small home appliances, have you ever encountered a situation where the power supply suddenly fails during use, only to discover upon disassembly that the Schottky diode is damaged? Such failures occur most frequently during power-on and power-off transitions. This is precisely the challenge posed by the inductive load characteristics of internal motors!

Power supply loads are categorized into capacitive, resistive, and inductive loads. As illustrated by the current waveforms during the switching on and off of different loads in the figure below, the current waveform of an inductive load exhibits a distinct phase lag behind the voltage waveform. This occurs because switching an inductive load generates a transient current, which induces a Back Electromotive Force (Back EMF) in the circuit, causing the voltage to spike or drop instantaneously.

The switching of inductive loads generates Back Electromotive Force (Back EMF) and transient currents, imposing multiple severe impacts on switching power supplies:

1. Voltage Spikes and Surges: The Back EMF superimposes on the supply voltage, easily exceeding the voltage rating of the switching transistor and causing catastrophic damage. It can also introduce electromagnetic interference (EMI) to other equipment.

2. Current Waveform Distortion: The phase lag of the current causes the waveform to deviate from a pure sine wave. This degrades the power factor, increases power dissipation, and can even compromise grid power quality and EMC test compliance.

6. Startup Challenges: Inductive loads, such as motors, draw extremely high inrush currents during startup. If the power supply's output capacity is insufficient, it may trigger protective shutdown mechanisms or cause permanent damage to the components.


To address the critical pain points caused by the impact of inductive loads on switching power supplies, Shenzhen World Industrial Co., Ltd. offers the MBR10200D DC-DC Schottky diode. Still struggling with component burnouts during power-on transitions? The MBR10200D is engineered specifically to resolve this issue, effectively withstanding the spike voltages and Back Electromotive Force (Back EMF) generated during the switching on and off of inductive loads.