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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K1300E70AP
SIDAC 120-138V 1A TO92
DB3
DIAC, 36V MAX, DO-204AH
K2000EH70RP3
SIDAC 190-215V 1A TO92
TMMDB3TG
DIAC 30-34V 2A MINIMELF
K2500GURP
SIDAC UNI 240-260V 1A DO-15
NTE6407
D-DIAC 28V+-4V 2A
K2000S1URP
SIDAC 190-210V 1A UNI DO-214AC
K1100SRP
SIDAC 104-118V 1A DO214
K0900SRP
SIDAC 79-97V 1A DO214
K1050GURP
SIDAC 95-110V 1A UNI DO-15
MKP9V160RL
SIDAC 150-170V 900MA AXIAL
MKP3V120G
SIDAC, 130V MAX
K2200E70RP2
SIDAC 205-230V 1A TO92
K2200GHURP
SIDAC 205-230V 1A DO15
SMDB3
DIAC 28-36V 1A SOT23-3
K2300G
SIDAC 230V DO15
K1800S1URP
SIDAC 180V DO214AC 2L
D32PBULK
DIAC 1.6A, CASE TYPE: DO-41
K1800GURP
SIDAC 180V DO-15
K1100E70RP2
SIDAC 104-118V 1A TO92