The DB2 is a silicon bi-directional trigger diode (DIAC) commonly used in power control circuits, such as light dimmers and motor speed controllers, to trigger triacs.
Below is a technical post draft summarizing the DB2 specifications and its role in electronic design. 🔍 Tech Deep Dive: The DB2 DIAC
The DB2 DIAC is a staple in AC power switching. Unlike standard diodes, it remains non-conductive in both directions until the voltage across it reaches a specific "breakover" threshold, at which point it conducts heavily to trigger a gate. Key Technical Specifications
While you should always verify with the official DIAC DB2 Datasheet for your specific manufacturer, typical parameters include: Breakover Voltage ( VBOcap V sub cap B cap O end-sub ): Generally ranges between 28V and 36V. Breakover Current ( IBOcap I sub cap B cap O end-sub ): Typically max 50 µA. Peak Pulse Current ( ITRMcap I sub cap T cap R cap M end-sub ): Usually around 2A for a short duration ( Operating Junction Temperature ( Tjcap T sub j ): -40negative 40 +125positive 125 Common Applications
TRIAC Triggering: Providing the sharp pulse needed to turn on a TRIAC in AC dimmers. Motor Speed Control: Regulating power for inductive loads.
Fluorescent Lamp Ballasts: Assisting in the startup phase of lighting circuits. Design Pro-Tip
When using the DB2 in a circuit (like an AC motor speed control), ensure your RC network is tuned to hit the breakover voltage at the desired phase angle for smooth power variation.
Looking for more? You can find detailed PDF versions from manufacturers like STMicroelectronics on The Datasheet Archive. Datasheet - DB3, DB4, SMDB3 - Diac - STMicroelectronics
The DIAC DB2 is a bidirectional trigger diode designed specifically to operate in conjunction with Triacs and SCRs. It functions as a voltage-sensitive switch that remains non-conductive until a specific breakover voltage is reached, at which point it allows current to flow in either direction. Core Specifications of the DB2 DIAC
The DB2 is often grouped with similar models like the DB3 or DB4, but it has distinct electrical parameters optimized for triggering. Typical Value / Range Breakover Voltage ( VBOcap V sub cap B cap O end-sub ) 28V to 36V (typically 32V) Breakover Current ( IBOcap I sub cap B cap O end-sub ) Maximum 50µA to 100µA Peak Pulse Current ( ITRMcap I sub cap T cap R cap M end-sub ) Output Voltage ( VOcap V sub cap O ) Minimum 5V Rise Time ( ) Maximum 1.5µs to 2µs Operating Temperature -40°C to +125°C Key Features STMicroelectronicshttps://www.st.com Datasheet - DB3, DB4, SMDB3 - Diac - STMicroelectronics
In the quiet hum of a basement workshop, an old lamp flickered. For years, its light was either blindingly bright or non-existent—a simple binary of on and off. The craftsman, tired of the harsh glare, decided it was time for a change. He sought the "spark" that could tame the electricity: the DB2 DIAC.
He pulled a weathered, 14-page Datasheet PDF from his digital archives. Page 14 was the key—it held the final thermal derating curves and mechanical dimensions. The DB2 was a tiny thing, no larger than a grain of rice, but it possessed a unique power. Unlike standard diodes that only let current flow one way, the DB2 was a gatekeeper of balance. It waited patiently for the voltage to reach its "breakover" point—exactly 32 volts, according to the specs. Diac Db2 Datasheet Pdf 14
Only then would it snap shut, sending a pulse to trigger the TRIAC, the heavy lifter of the circuit.
As the craftsman soldered the DB2 into place, he followed the diagram meticulously. He turned the dial on the new dimmer switch. The filament didn't just jump to life; it breathed. It began as a soft, warm amber glow, slowly ascending to a brilliant white. The DB2 was the invisible conductor of this symphony, firing its pulses thousands of times a second, hidden within the shadows of the copper traces. Technical Context
If you are looking for the actual technical data, the DB2 (often cross-referenced with the TMMDB3) is typically manufactured by STMicroelectronics or other semiconductor firms. Key specs include: VBO (Breakover Voltage): Typically 28V to 36V.
Application: Used primarily in conjunction with TRIACs for AC switching. Package: Often found in DO-35 or SOD-27 glass packages. DIAC DB2 Datasheet(PDF) - TMMDB3 - STMicroelectronics DIAC DB2 Datasheet(PDF) - TMMDB3 - STMicroelectronics. ALLDATASHEET.COM DIAC DB2 DIODE Datasheet(PDF) - ALLDATASHEET.COM
DIAC DB2 DIODE Datasheet(PDF) - TMMDB3 - STMicroelectronics. ALLDATASHEET.COM DIAC DB2 Datasheet(PDF) - TMMDB3 - STMicroelectronics DIAC DB2 Datasheet(PDF) - TMMDB3 - STMicroelectronics. ALLDATASHEET.COM DIAC DB2 DIODE Datasheet(PDF) - ALLDATASHEET.COM
DIAC DB2 DIODE Datasheet(PDF) - TMMDB3 - STMicroelectronics. ALLDATASHEET.COM
The search for "Diac Db2 Datasheet Pdf 14" signals a legitimate need: you are planning to deploy, upgrade, or troubleshoot Diac’s monitoring for DB2 on IBM i 7.4. Here is your summary action plan:
By treating this datasheet not as a static file but as a technical roadmap, you will maximize your DB2 for i performance and avoid the hidden pitfalls that only proper monitoring can reveal.
Further reading: IBM Redbook “DB2 for i SQL Performance Diagnosis and Tuning” (SG24-8226) complements the Diac datasheet by explaining the underlying DB2 metrics that Diac visualizes.
Last updated: 2025
Disclaimer: Product names and version numbers are subject to change. Always consult the official vendor documentation for the most current information.
The DIAC DB2, often representing standard DB-series bidirectional trigger diodes, typically features a breakover voltage of 28V to 36V, a maximum breakover current of 50µA to 100µA, and is available in axial (DO-35) or SMD (SOD-123/SOT-23) packages. These components are primarily used to trigger TRIACs in AC power control applications like dimmers and motor speed controls. For technical specifications and PDF datasheets, visit AllDatasheet. DIAC DB2 Datasheet(PDF) - TMMDB3 - STMicroelectronics DIAC DB2 Datasheet(PDF) - TMMDB3 - STMicroelectronics. ALLDATASHEET.COM DIAC DB2 DIODE Datasheet(PDF) - TMMDB3 - ALLDATASHEET.COM The DB2 is a silicon bi-directional trigger diode
DIAC DB2 DIODE Datasheet(PDF) - TMMDB3 - STMicroelectronics. ALLDATASHEET.COM SMD TRANSISTOR W02 Search Results - The Datasheet Archive
The DB2 DIAC is a specialized bidirectional trigger diode frequently used in AC power control circuits, such as light dimmers and motor speed controllers. While modern datasheets often focus on the more common DB3 or DB4 variants, the DB2 remains a key reference for lower-voltage triggering applications. Core Technical Specifications
Based on typical DB2 technical documentation, this component acts as a solid-state switch that remains "open" until it reaches its specific breakover voltage ( VBOcap V sub cap B cap O end-sub DB2 Marking, DB2 Datasheet - ALLDATASHEET.COM
I cannot directly access external files, databases, or specific PDFs such as a “Diac DB2 Datasheet PDF 14.” My capabilities do not include real-time browsing, retrieving documents from the internet, or opening proprietary or internal datasheets.
However, I can help you develop a professional review template for a DIAC (Diode for Alternating Current) datasheet (e.g., DB2, DB3, DB4 series). If you provide the key specifications from your PDF (e.g., breakover voltage, peak current, datasheet author, part number), I can analyze them.
In the meantime, here is a structured review framework you can apply to your “Diac DB2 Datasheet PDF 14”:
Search for:
"DB2 DIAC datasheet PDF""DB2-14 DIAC datasheet" (if looking for 14V variant)⚠️ Note: Most common DB2/DB3/DB4 DIACs have VBO > 24V. If you have a 14V version, it might be a specialized part (e.g., BR100 or custom). Verify marking or measure VBO.
The DB2 is a bidirectional trigger diode (DIAC) designed to switch Triacs and SCRs in power control applications, featuring a typical breakover voltage ( cap V sub cap B cap O end-sub
) between 28V and 36V. These components are essential for phase control circuits, such as light dimmers and motor speed controllers, and are commonly available through electronic component distributors. For comprehensive technical specifications, refer to the datasheet available from AllDataSheet Mouser Electronics DB3/DC34 AND DB4/DB6 - Mouser Electronics
A guide for the DB2 DIAC (Diode for Alternating Current) is outlined below, based on standard industry datasheets for this bidirectional trigger diode. While often grouped with the more common DB3 series, the DB2 typically features a lower breakover voltage. 1. Key Specifications (Typical Values) Conclusion: Your Action Plan The search for "Diac
The DB2 is a three-layer, two-terminal device designed for triggering thyristors like TRIACs in AC power control. Breakover Voltage ( VBOcap V sub cap B cap O end-sub ): Typically 28V to 36V (varies by specific manufacturer). Breakover Current ( IBOcap I sub cap B cap O end-sub ): Max 50 A. Repetitive Peak On-State Current ( ITRMcap I sub cap T cap R cap M end-sub ): 2.0 A (at , ). Operating Junction Temperature ( Tjcap T sub j ): -40°C to +125°C.
Package Type: Usually DO-35 (axial leaded glass) or surface-mount equivalent. 2. Device Operation & Characteristics Datasheet - DB3, DB4, SMDB3 - Diac - STMicroelectronics
The DIAC DB2 is a bidirectional trigger diode designed primarily for phase control applications, such as lamp dimming and motor speed regulation. Often packaged in a hermetically sealed glass DO-35 case, it provides a stable and symmetrical trigger pulse for thyristors like TRIACs. Key Specifications and Features
Technical details for the DB2 series typically align with standard trigger diacs, focusing on breakover voltage and peak current. Breakover Voltage ( VBOcap V sub cap B cap O end-sub
): Ranges from 28V to 36V, with a typical value of approximately 32V.
Breakover Voltage Symmetry: Typically within 3V, ensuring the DIAC fires at nearly identical voltage levels in both positive and negative AC half-cycles. Repetitive Peak On-State Current ( ITRMcap I sub cap T cap R cap M end-sub ): Supports up to 2.0A for short pulses (e.g., at 120Hz).
Power Dissipation: Approximately 150mW at an ambient temperature of 50∘C50 raised to the composed with power cap C 65∘C65 raised to the composed with power cap C Operating Temperature Range: Functional between -40∘Cnegative 40 raised to the composed with power cap C
+110∘Cpositive 110 raised to the composed with power cap C .
Packaging: Standard axial lead DO-35 glass package for through-hole mounting. Operational Characteristics
The DB2 behaves like a "transistor without a base". It remains in a non-conductive state until the applied voltage exceeds its specific breakover threshold. Once triggered, its resistance drops sharply (negative resistance characteristic), allowing a pulse of current to flow to the gate of a TRIAC. Datasheet - DB3, DB4, SMDB3 - Diac - STMicroelectronics
This paper provides a comprehensive technical overview of the DB2 series component. While often confused with a Diac (Diode for Alternating Current) due to nomenclature similarities, the DB2 is a standard single-phase silicon bridge rectifier. This document analyzes its electrical characteristics, thermal properties, mechanical dimensions, and common applications in power supply circuits.
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