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
K2500E70
SIDAC 240-280V 1A TO92
K1300SRP
SIDAC 120-138V 1A DO214
NTE6412
D-DIAC 63V+-7V 2A
K2500EH70
SIDAC 240-280V 1A TO92
K2500GHURP
SIDAC 240-280V 1A DO15
K2300GURP
SIDAC UNI 220-240V 1A DO-15
K2401G
SIDAC 220-250V 1A DO15
K1300E70
SIDAC 120-138V 1A TO92
K2000GHU
SIDAC 190-215V 1A DO15
K1100GRP
SIDAC 104-118V 1A DO15
K1500GAP
SIDAC 140-170V 1A DO15
K2200GRP
SIDAC 205-230V 1A DO15
K2501GL
SIDAC MP 240-265V H.V. DO15
K2400GRP
SIDAC 220-250V 1A DO15
DB4
DIAC 35-45V 2A DO35
K1050GRP
SIDAC 95-113V 1A DO15
K2200E70RP3
SIDAC 205-230V 1A TO92
K1050S1URP
SIDAC 95-110V 1A UNI DO-214AC
K1100E70
SIDAC 104-118V 1A TO92
2N4991
SBS TO92