SMPC78AN-M3/I Circuit Protection

Surge protective devices (SPDs) are protective components designed to prevent intrusive surge currents from flowing through circuits and equipment. The SMPC78AN-M3/I is a bi-directional clamping transient voltage surge suppressor (TVS-Diode) specifically intended for surge protection of data lines such as 10 Mbps data lines. It provides excellent suppression performance and features a low leakage current, excellent clamping characteristics, and a high peak pulse power rating. It can also be used to protect for short-circuit protection on data lines.

Such an application makes the SMPC78AN-M3/I ideal for a variety of applications including digital audio/video interfaces, RS232/RS485 applications, portable devices, telecom systems, and video signal systems. The SMPC78AN-M3/I also features a low shell capacitance to prevent LCD screen flicker.

The working principle of the SMPC78AN-M3/I is based on the avalanche breakdown process to clamp the transient voltage. When the voltage applied to a diode reaches its breakdown voltage, a very large current flows in the device, which quickly rises to a peak value. The peak current is determined by the junction temperature and the forward current applied. The leakage current of the device is very small and does not interfere with the operation of the system.

The SMPC78AN-M3/I is a low on-resistance clamping device with typical values of 0.3 ohms in low voltage operation and 0.9 ohms in high voltage operation. The peak pulse power rating of the device is 20 kV, and the peak current rating is 400 A. The device is also designed to have a high clamping voltage during a transient surge. The breakdown voltage of the device is traditionally measured at 5V, 10V, and 15V.

The SMPC78AN-M3/I is also designed to be resistant to environmental influences. The device is ESD-protected and has a wide operating temperature range from -40°C to +85°C. The SMPC78AN-M3/I is also equipped with UL, CSA, and VDE safety approvals. The device is RoHS compliant and is also available with UL 94V-1 flame retardant construction for protection against the spread of fire.

The SMPC78AN-M3/I is a great choice for surge protection applications, and it features excellent transient suppression performance. The device is suitable for a variety of applications and can be used in high power, low voltage systems. The device is also designed to be resistant to environmental influences and is RoHS compliant.