Thyristors - DIACs, SIDACs
Thyristors - DIACs, SIDACs: Precision Triggering Components for Power Control
Definition & Overview
Thyristors - DIACs (Diode for Alternating Current) and SIDACs (Silicon Diode for Alternating Current) are specialized discrete semiconductor devices designed for precise voltage-triggering applications in AC circuits. As subcategories under Discrete Semiconductor Products, these components act as bidirectional switches, enabling controlled conduction upon reaching a specific breakdown voltage. DIACs are typically used to trigger TRIACs in phase-control circuits, while SIDACs handle higher voltage/current surges, making them ideal for overvoltage protection and ignition systems.
Product Types & Variations
This classification includes:
1. DIACs: Low-power trigger devices with symmetric switching characteristics (e.g., DB3, ST2).
2. SIDACs: High-voltage variants with latching behavior (e.g., Kxxx1A series).
3. Surface-Mount (SMD) & Through-Hole Packages: Options for PCB assembly flexibility.
4. Voltage Ratings: Ranging from 20V to 250V+ for diverse circuit requirements.
Purchasing Recommendations
1. Match Voltage Ratings: Select DIACs/SIDACs with a breakdown voltage (VBO) compatible with your circuit s operational range.
2. Current Handling: Ensure the surge current (IS) meets load demands, especially for SIDACs in high-energy apps.
3. Package Compatibility: Verify footprint dimensions (e.g., DO-35 for DIACs) against your PCB design.
4. Reliability Standards: Opt for AEC-Q200 certified parts for automotive or industrial use.
Why Choose This Category?
DIACs/SIDACs deliver cost-effective, noise-resistant switching solutions for dimmers, motor controls, and protection circuits. Their simplicity and robustness make them indispensable in power electronics. Browse our catalog for industry-leading brands (STMicroelectronics, Littelfuse) and datasheet-backed inventory.
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Categories
HT36B
DIAC 34-38V 2A DO35
CT-40E BK
DIAC DO-41
K2401F1
SIDAC 220-250V 1A TO92
ST36B
DIAC 34-38V 2A DO214
HT5761
DIAC 28-36V 2A DO35
LIC01-195H
DIAC 195-230V 1.2A IPAK
HT32
DIAC 27-37V 2A DO35
K2500S
SIDAC 240-280V 1A DO214
HT40
DIAC 35-45V 2A DO35
HT5762RP
DIAC 32-40V 2A DO35
K1300S
SIDAC 120-138V 1A DO214
SODDB3 RHG
DIAC-TRIGGER DIODE, 400MW, 36V V
K0900S
SIDAC 79-97V 1A DO214
K2200S
SIDAC 205-230V 1A DO214
HT5761ARP
DIAC 30-34V 2A DO35
K1200S
SIDAC 110-125V 1A DO214
HT32BRP
DIAC 30-34V 2A DO35
HT5762
DIAC 32-40V 2A DO35
ST40RP
DIAC 35-45V 2A DO214
HT32ARP
DIAC 28-36V 2A DO35