Diac Db2 Datasheet Pdf 14 May 2026
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. Diac Db2 Datasheet Pdf 14
Looking for more? You can find detailed PDF versions from manufacturers like STMicroelectronics on The Datasheet Archive. Datasheet - DB3, DB4, SMDB3 - Diac - STMicroelectronics
"Diac Db2 Datasheet Pdf 14" is a common remnant of automated spam or pirated PDF index searches rather than a real, singular electronic component. In the world of power electronics, the component you are looking for is a
(Diode for Alternating Current), and the most famous part families associated with it are the DB3, DB4, and SMDB3 series produced by manufacturers like STMicroelectronics
A complete overview of DIACs, their typical datasheet specifications, and their practical use in electronic circuits is detailed below. What is a DIAC?
is a bidirectional trigger diode designed specifically to trigger thyristors, such as TRIACs. It does not conduct current until the voltage applied across it reaches a specific threshold known as the Breakover Voltage ( cap V sub cap B cap O end-sub
. Once this threshold is crossed, the device enters a state of negative resistance, causing a sharp drop in voltage and a sudden pulse of current. Standard Specifications Found in DIAC Datasheets The DB2 is a silicon bi-directional trigger diode
While specific part numbers vary, standard DIACs (like the DB3) share highly similar electrical profiles: What is Bootstrap? - „ZBYMAR” Mariusz Błażejewicz
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
However, the part number DB2 refers to a very common component manufactured by Fuji Electric and others, which is a Diode Bridge Rectifier (specifically a Single-phase Bridge Rectifier). It is often mistakenly called a "Diac" because of the phonetic similarity or a misunderstanding of the schematic symbol.
Below is a complete technical paper analyzing the Fuji Electric DB2 (often found in datasheets as DB2S, DB2M, or DB2G), which matches the "DB2" identifier and is typically available in the PDF format you requested. If you are actually looking for a Diac component (like the DB3), please see the note at the end.
4. Key Differences Between DB2 Marking vs Real DB3/DB4/DB6
| Marking on part | Actual part | VBO range | Use case | |----------------|-------------|-----------|-----------| | DB2 | DB3 (likely) | 28–36 V | low-voltage dimmers | | DB2 | DB4 | 35–45 V | standard triac trigger | | DB2 | DB6 | 56–70 V | 220V AC phase control | If you see “DB2” on a DO-35 glass
If you see “DB2” on a DO-35 glass body, measure VBO or test in a simple relaxation oscillator with an oscilloscope.
Part 2: The Official “Diac Db2 Datasheet Pdf 14” – What’s Inside?
Your search for “Diac Db2 Datasheet Pdf 14” likely points to a technical document from IBM that consolidates all DIAC-related parameters for Db2 14. While I cannot directly embed a PDF file, I will detail the exact contents you would find in the official IBM Redbook, Knowledge Center, or Installation Guide under the Db2 14 for z/OS (or LUW) sections.
Key Parameters Found in the DIAC Datasheet (Db2 14)
Below is a datasheet-style table of the most important DIAC parameters in Db2 14. Use this as your quick reference.
| Parameter Name | Scope | Default in Db2 14 | Description |
|----------------|-------|-------------------|-------------|
| LOCKMAX | Subsystem/Table | 0 (no limit) | Maximum number of locks per plan/owner before escalation. |
| LOCKTIMEOUT | Subsystem | 30 seconds | Seconds a transaction waits for a lock before timeout. |
| CLAIM DRAIN | Object | AUTOMATIC | Mechanism to allow utility operations while maintaining concurrency. |
| SKIP LOCKED | Statement level | OFF (must enable) | Allows SELECT to skip rows locked by other transactions. |
| CURRENTDATA | Package/Bind | YES (or NO) | Controls whether cursors read committed or block-fetch sensitivity. |
| ISOLATION(CS) | Session | Cursor Stability | Default isolation level; heavily influenced by DIAC settings. |
| LOCKLIST | Subsystem | 20480 KB | Total storage for lock information. |
| MAXLOCKS | Subsystem | 10% | Percentage of LOCKLIST a single application can consume. |
Note: The official Db2 14 for z/OS Data Sharing: Planning and Administration PDF (often called the “DIAC Datasheet” informally) contains detailed graphs showing how lock contention changes with each parameter.
2.1 System Requirements for DB2 for i 7.4
- Minimum IBM i release: 7.4 TR3 (Technology Refresh 3) or higher.
- Memory recommendations: 8 GB minimum; 32 GB+ for active monitoring.
- Storage: 100 GB for historical data retention (configurable down to 30 days).
- Licensing: Per-core or per-user? The datasheet clarifies the shift to per-core for DB2 monitoring in version 14.
Abstract
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.