SMBJ26A-QH

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TVS - Diodes: SMBJ26A-QH Application Field and Working Principle

The Transient Voltage Suppressor (TVS) diodes are commonly used in many electronic devices from computers, phones, medical equipment, automobiles, military and aerospace applications. The TVS diodes are able to rapidly detect and absorb transient voltage spikes above a threshold voltage value. This protects the delicate circuitry in a variety of electronic devices from damage.

The SMBJ26A-QH is a commercial transient voltage suppressor diode produced by Vishay Intertechnology. It is an axial-leaded device with a standoff voltage of 26 volts and a peak surge current of up to 175 Amps. It is commonly used in low voltage applications such as modems, routers, electronic timer circuits, and other sensitive circuitry.

The SMBJ26A-QH manages transient voltage spikes by carefully controlling the current and voltage levels of the circuit in which it is installed. In low voltage applications, the device’s low standoff voltage rating allows for a small voltage spike to be safely dissipated before it reaches the sensitive parts of the circuit. The diode is able to achieve this because of its “avalanche effect” phenomenon, when a large current increases rapidly as the voltage reaches its rated “breakdown potential”. This allows the TVS diode to absorb the excess energy in the form of a large current.

The SMBJ26A-QH device is designed to protect against typical low (0 – 24 Volt) transient voltage spikes and negative transients. It has a high peak pulse power rating of 975 Watts (1/10 μs), a maximum reverse stand-off voltage of 26 volts, and a maximum peak surge current of 175 Amps. Its breakdown voltage ranges from 16.7 to 27 Volts, providing excellent protection against low voltage transients. The device is also quite durable, with a maximum operating temperature rating of 175 °C.

In conclusion, the SMBJ26A-QH is a reliable and cost-effective Transient Voltage Suppressor designed to provide protection against low voltage transients. It is able to quickly absorb large amounts of energy, up to 975 Watts, in the form of a large current and help protect delicate circuitry from damage. The device is suitable for a wide variety of applications, and its low cost and durable construction make it ideal for consumer electronics.

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