SMDB3

STMicroelectronics SMDB3

Name: SMDB3
Brand: STMicroelectronics
SKU: SMDB3
Availability: InStock
Rating: 5.0 (8 reviews)
Author: Jinftry

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Part Number： SMDB3
Manufacturer： STMicroelectronics
Description:DIAC 28-36V 1A SOT23-3
Category： Thyristors - DIACs, SIDACs
Datasheet： SMDB3 Datasheet
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Package/Case： TO-236-3, SC-59, SOT-23-3
Package： Bulk
RoHS： Lead free / RoHS Compliant
Stock Quantity： 29276
Stock Resource：Spot Inventory / Athorized Dstributor / Factory Excess Stock
Quality Guarantee：1 year quality assurance 》
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What is SMDB3

STMicroelectronics Part Number SMDB3（Thyristors - DIACs, SIDACs）, developed and manufactured by STMicroelectronics, distributed globally by Jinftry. We distribute various electronic components from world-renowned brands and provide one-stop services, making us a trusted global electronic component distributor.

SMDB3 is one of the part numbers distributed by Jinftry, and you can learn about its specifications/configurations, package/case, Datasheet, and other information here. Electronic components are affected by supply and demand, and prices fluctuate frequently. If you have a demand, please do not hesitate to send us an RFQ or email us immediately [email protected] Please inquire about the real-time unit price, Data Code, Lead time, payment terms, and any other information you would like to know. We will do our best to provide you with a quotation and reply as soon as possible.

SMDB3 Specifications

Part NumberSMDB3
CategoryThyristors - DIACs, SIDACs
ManufacturerSTMicroelectronics
DescriptionDIAC 28-36V 1A SOT23-3
PackageBulk
Series-
Operating Temperature-40°C ~ 125°C (TJ)
Package / CaseTO-236-3, SC-59, SOT-23-3
Supplier Device PackageSOT-23-3
Voltage - Breakover28 ~ 36V
Current - Breakover10 µA
Current - Hold (Ih) (Max)-
Current - Peak Output1 A

Application of SMDB3

DIAC (double-ended bidirectional trigger diode) is often used in the startup circuit of SCR because of its trigger characteristics, to help SCR transition from the blocking state to the on-state, to achieve accurate control of alternating current. DIAC is also used in lighting dimming systems, motor speed control, and solid-state relays as a key trigger element. SIDAC is used in power management and temperature control system because it is used as a switch directly. For example, when the power supply is started, SIDAC (silicon bidirectional trigger diode) can sense the rise in voltage and automatically turn on the circuit, avoiding the delay and unreliability of traditional mechanical switches. At the same time, SIDAC is also used in overvoltage protection circuit, when the voltage is abnormally increased, SIDAC will quickly turn on, bypass the excess energy, and protect the subsequent circuit from damage.

SMDB3 Datasheet

SMDB3 Datasheet , Bulk,-40°C ~ 125°C (TJ),TO-236-3, SC-59, SOT-23-3,SOT-23-3,28 ~ 36V,10 µA,1 A

SMDB3 Classification

Thyristors - DIACs, SIDACs

DIAC (Double-ended bidirectional trigger diode) is a non-polar semiconductor device that has the same characteristics at forward and reverse voltages. DIAC is mainly used to trigger SCR or other phase controlled devices, when the applied voltage reaches its threshold voltage, DIAC will be switched on and make the current increase rapidly, thus triggering the phase controlled device. SIDAC (Silicon bidirectional trigger Diode) is similar to DIAC, but with added temperature compensation and higher trigger voltage stability. SIDAC is also used for triggering thyristor isopexes, but is designed to maintain consistent triggering performance at different temperatures.

FAQ about Thyristors - DIACs, SIDACs

1. What are DIACs and SIDACs used for?

DIACs and SIDACs are used as triggering devices in AC phase control applications, such as light dimmers, motor speed controls, and heater controls. They help in controlling the current flow by switching at a specific voltage threshold.
2. How do DIACs differ from SIDACs?

DIACs exhibit symmetrical voltage thresholds in both directions, while SIDACs often have higher breakover voltages and are suitable for applications requiring higher current capacities.
3. Can DIACs or SIDACs be replaced by other components?

While other semiconductor devices can sometimes be adapted, DIACs and SIDACs are optimized for their specific functions, making them difficult to replace directly in most designs.

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STMicroelectronics

Founded in 1987, STMicroelectronics is a company dedicated to the semiconductor industry formed by the merger of SGS Microelectronics from Italy and Thomson Semiconductor from France. The company is headquartered in Geneva, Switzerland and...