STMicroelectronics DIAC 36 V 2 A 2-Pin Through Hole DO-35 DB3

STMicroelectronics DB3 DIAC 2-Pin Through Hole DO-35 is a semiconductor device designed to act as a trigger diode with a fixed voltage reference, primarily used in AC switching applications. The device has a maximum breakover voltage of 36 V and a maximum breakover current of 50 μA, enabling it to conduct only after exceeding this threshold voltage. With a repetitive peak on-state current of 2 A, the device is well-suited for triggering triacs or silicon-controlled rectifiers (SCRs) in control circuits.

Built in a DO-35 through-hole package, the component features a compact form factor measuring 2 mm in height and 4.5 mm in length, making it compatible with traditional PCB layouts. The symmetrical 3 V breakover voltage ensures consistent and stable switching characteristics, essential for precise triggering behavior.

Operating effectively in a temperature range from -40°C to 125°C, the DB3 model is fit for use in diverse industrial and electronic control environments. It is commonly applied in circuits for motor and light dimmers, start-up triggering in fluorescent lamp ballasts such as CFL, TL, or LED lamps, and oscillator triggering devices, thus making it versatile for various power electronics applications.

This device does not carry any automotive certification but is trusted for general industrial and consumer electronics requiring reliable alternating current switching components. The DB3 series is recognised for its low breakover current and voltage symmetry, enhancing its performance in circuit control applications.

Maximum breakover current is 50 microamps ensuring low trigger current. Breakover voltage is 36 volts for controlled conduction triggering. Repetitive peak on-state current of 2 amperes enables reliable switching. Through hole mount with DO-35 package type suits traditional PCB assembly.

Operates reliably from -40°C to 125°C operating temperature range. Package dimensions include 2 mm height and 4.5 mm length for compact integration. Symmetrical breakover voltage with 3 V breakover voltage symmetry improves device stability.

Pin count of 2 pins allows straightforward circuit connection. Ideal for triggering triacs or SCRs and fluorescent lamp ballasts applications.

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