UTP28SP20GR-Q

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UTP28SP20GR-Q is a power semiconductor device and part of Triac / control series. It is widely used in circuit design with functions like controlling, interfacing, power switching, inverting, regulating, rectifying, etc. It has an operating temperature range of -25⁰C to 100⁰C and is available in different packages like 8-Pin plastic DIP, 4-Pin SOP, and 2-Pin Faston. Its insulation resistance is minimum 2000V depending on the application. It also has a high current density and high surge current capability.

Its application field is broad, mainly used in contact heating, AC motor speed programming, fan speed regulation, water heater control, multi-wire resistance heating, environmental protection energysaving equipment, industrial control, office automation, HVAC systems, switch power supplies, home appliances, LED lighting and other related devices.

Virtually, most Triac-controlled circuits will run on UTP28SP20GR-Q since it provides high control accuracy and lower operating power. Its working principle depends on when a Triac is in the off state, it forms a diode bridge, which is controlled by an input signal voltage. AC supply applied to the diode bridge is converted into DC voltage which turns ON the gate terminal of Triac. This gate current activates the Triac, and it may switch ON/OFF the circuit at higher frequency. UTP28SP20GR-Q reduces heat generation, and current surge in case of transient circuit operation.

More precisely, UTP28SP20GR-Q works in two conduction modes: active and quiescent, depending on the device characteristic and the expected output. Activemode conduction has low current and low power dissipation, while quiescentmode conduction offers higher current and higher power dissipation. Both modes work similar to that of Thyristor. A pair of dual gate N-type MOSFET are connected in series and each one is sealed in the middle of the Triac.

Since UTP28SP20GR-Q works as a semiconductor, it eliminates the need of expensive relays, making it more energy efficient. In addition, it also allows the current to be changed proportional to the input signal, enabling its customers to control load with great precision. This feature makes it most suitable for applications that require optimal current control, as is the case of AC motor speed programming.

To sum up, UTP28SP20GR-Q is a power semiconductor device with a wide range of applications, such as contact heating, AC motor speed programming, water heater control, and LED lighting. Its main features include high control accuracy, low power dissipation, high surge current capability, and high current density. The device works in two conduction modes, active and quiescent, and it eliminates the need of expensive relays, thus making it more energy efficient.

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