MSMBJ85A

The MSMBJ85A is a Voltage Suppressor Diode (VSD) made by Microsemi and is classified as a Transient Voltage Suppressor (TVS). It is a component commonly used in the fields of automotive, aerospace and industrial electronics providing surge protection for sensitive systems against electrical spikes (also known as electrical transients) caused by lightning, switching or motor cycling.

The MSMBJ85A is made of NPN silicon junctions housed in a dual-exposed submount of a dual (MOS) package, with a plastic enclosure. This component has a Peak Pulse Power (PPP) rating of 8000W@10/1000μs, a Pulse Forward Peak Current (IFP) rating of 40A@10/1000μs and an operating junction temperature of -55°C to +150°C. This component is also non-polar and open-circuit in nature.

The MSMBJ85A is a voltage dependent devices that helps to protect against electrical overvoltage, overcurrent and short-circuit conditions. It is composed of a breakdown junction that can effectively limit a voltage or current spike to a safe level, thus preventing possible damage to the connected circuitry. The breakdown voltage is typically specified in either a positive or a negative direction, and the voltage dissipation varies with the degree of current it is subjected to.

The operating principle of the MSMBJ85A is very simple. When it is subjected to a voltage lower than the specified breakdown voltage, it will clamp the voltage to the specified breakdown voltage. That is, it will reduce the voltage level to a safe level and keep it constant at that level until the transient voltage spikes have passed. This action prevents the sensitive downstream circuitry from damage caused by excessive voltages.

The MSMBJ85A is commonly found in automotive, aerospace and industrial applications, with uses ranging from protecting DC-DC converters from high electrostatic discharges to protecting power tools from high transient voltages generated by unreliable power sources. This component is also used for start up protection, protecting battery chargers from inadvertent voltage overshoot anf in circuit protection against overvoltage and overcurrent.In automotive applications, the MSMBJ85A is typically used as a protection against short-circuit and circuit-horrification, protecting automotive ECUs and other electronic device against voltage spikes generated by lighting.

In conclusion, the MSMBJ85A is an effective overvoltage solution for automotive, aerospace and industrial fields, providing reliable protection against electrical surge, overvoltage and overcurrent conditions. This component is easy to integrate in many application and it\'s non-polar and open circuit design guarantees fast response times.