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STMicroelectronics DIAC 36 V 1 A 3-Pin SOT-23 Trigger Diode SMDB3

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STMicroelectronics DIAC 36 V 1 A 3-Pin SOT-23 Trigger Diode SMDB3

Name: STMicroelectronics DIAC 36 V 1 A 3-Pin SOT-23 Trigger Diode SMDB3
Brand: STMicroelectronics
SKU: 286417
Price: 0.16 USD
Availability: InStock

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Category Discrete Semiconductor Brand STMicroelectronics Condition New

Specifications

Country of Origin	India
Brand	STMicroelectronics
Height	0.95mm
Length	2.9mm
Model	SMDB3
Mount Type	Surface
Series	SMDB3
Maximum Operating Temperature	125°C
Package Type	SOT-23
Minimum Operating Temperature	-40°C
Pin Count	3
Repetitive Peak Off-State Current	0.01mA
Maximum Breakover Current IBO	0.01mA
Maximum Breakover Voltage VBO	36V
Repetitive Peak On-State Current	1A
Breakover voltage symmetry	3V
VBO	32 V and 40 V

Key Features

Offers low breakover current for precise triggering.
Designed for surface mount with compact SOT-23 package.
Breakover voltage shows symmetrical characteristic with 3V tolerance.
Operates reliably between -40°C and 125°C ambient temperatures.
Functions as a bi-directional trigger diode for AC circuits.
Allows simplified gate control of triacs and SCRs in dimmers and motor controls.
Suitable for use in fluorescent lamp ballasts and oscillators.
Provides stable breakover voltage of 32 V to 40 V range.

Product Description

STMicroelectronics SMDB3 is a DIAC (Diode for Alternating Current) designed as a trigger diode with a fixed voltage reference in a compact 3-pin SOT-23 surface mount package. The diode features a maximum breakover voltage of 36 V and supports a repetitive peak on-state current of 1 A, making it ideal for controlling the gate of triacs and SCRs in industrial and commercial electronic circuits.

This device enables simplified gate triggering and is often used in motor control applications and light dimmers, providing reliable switching performance. Additionally, it serves as a starting element in fluorescent lamp ballasts such as CFL, TL, and LED lamps, improving energy efficiency and device longevity.

With its low breakover current and symmetrical breakover voltage characteristics approximately 3 V, the SMDB3 ensures consistent and precise activation in AC applications. It operates efficiently in a wide temperature range from -40°C to 125°C, suitable for various industrial environments.

The small SOT-23 package with dimensions of 2.9 mm length and 0.95 mm height supports compact and automated PCB designs, ideal for high-volume manufacturing lines requiring surface-mount technology.

Low breakover current optimizes triggering sensitivity. Symmetrical breakover voltage improves circuit stability. Wide operating temperature range from -40°C to 125°C. Compact SOT-23 surface mount package enhances design flexibility.

Compatible with triac and SCR gate control circuits. Effective in lighting ballast trigger applications. Stable electrical parameters ensure reliable switching. Automated manufacturing friendly design.

This STMicroelectronics SMDB3 DIAC is suitable for use in industrial, commercial lighting control, HVAC, and electronic manufacturing applications. Its robust design and proven electrical characteristics provide enhanced performance in triggering and switching AC loads. Explore more STMicroelectronics components and related semiconductor devices in the Electronics & Electricals category on EnvMart.

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