SSR (Solid State Relay)
SSR (Solid State Relay) is an electronic switching device that switches electrical loads without moving parts, unlike traditional mechanical relays. It uses semiconductor components such as thyristors, triacs, or MOSFETs to control power flow.
Key Features of SSRs:
No moving parts → Longer lifespan and silent operation
Fast switching speed Ideal for high-speed applications
Low power consumption → More efficient than electromechanical relays
No contact wear Reliable operation without arcing
Types of SSRs:
1. Zero-Crossing SSR - Switches at the zero-voltage point to minimize electrical noise.
2. Random Turn-On SSR - Switches on immediately when triggered, used in phase control applications.
3. Analog-Controlled SSR - Can vary output power based on an analog signal.
Applications in Electrical Systems:
Industrial automation
Motor control
Heating elements (HVAC)
LED lighting control
AC/DC switching
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