In the world of semiconductor triggering devices, few components are as reliable and widely used as the DIAC (Diode for Alternating Current). Among the various DIAC models available, the DB2 (often labeled as DB2, DB3, or DB4 depending on the voltage class) stands out as a standard choice for triggering TRIACs in phase control circuits. If you have been searching for the keyword "diac db2 datasheet pdf 14 top", you likely need a deep dive into the 14 most critical parameters, where to find the official datasheet PDF, and application insights.
Without the DB2, the TRIAC would turn on gradually, leading to inefficient switching and harmonic distortion. diac db2 datasheet pdf 14 top
STMicroelectronics DB2 Datasheet
[Search ST.com for "DB2 DIAC"] → Select product → Documentation → Download PDF. Comprehensive Guide to the DIAC DB2: Datasheet, PDF,
Negative Resistance: When it reaches its limit, the DB2 doesn't just "leak" current; it undergoes a rapid internal change where its resistance actually drops as current increases. This creates the high-speed pulse needed to wake up larger power components. Without the DB2, the TRIAC would turn on
📄 The Datasheet (PDF) If you are looking for the PDF, you can usually grab the official document directly from major semiconductor distributors. Look for the "DB2" series (often manufactured by names like STMicroelectronics, ON Semiconductor, or Littlefuse).
Remember these three final takeaways:
| # | Parameter | Symbol | Value | Unit | Conditions | |---|-----------|--------|-------|------|-------------| | 1 | Breakover Voltage (Symmetrical) | VBO | 30 – 34 | V | Typically 32V | | 2 | Breakover Voltage Symmetry | ΔVBO | ±3 | V | Difference between positive & negative | | 3 | Breakover Current | IBO | 50 – 200 | µA | Max 200 µA | | 4 | On-State Voltage | VT | ~5 | V | At IT = 1A (pulse) | | 5 | On-State Current (Peak) | ITM | 2 | A | Non-repetitive, 10ms pulse | | 6 | Peak Pulse Current | IPSM | 10 | A | t = 20 µs | | 7 | Off-State Leakage Current | IDRM | 10 | µA | At V < VBO | | 8 | Holding Current | IH | 50 | mA | Typical value | | 9 | Switching Power Dissipation | PGM | 5 | W | For pulse condition | | 10 | Operating Junction Temperature | Tj | -40 to +125 | °C | Full range | | 11 | Storage Temperature | Tstg | -55 to +150 | °C | No bias | | 12 | Output Voltage Rise Rate | dv/dt | 50 | V/µs | Minimum guaranteed | | 13 | Package Options | – | DO-35, SOT-23, SOD-123 | – | Through-hole & SMD | | 14 | Lead-Free & RoHS | – | Yes | – | Compliant |