App note from International Rectifier on various solid state relay circuits. Link here (PDF) Manufacturers of satellites, satellite launch vehicles, and tactical weapon systems face many challenges when designing electro-mechanical relays (EMR) into their systems. Some method of “cushioning” must be employed in order to prevent false relay operation when encountering shock and vibration. In […]
Tag Archives: solid state relay
App note: Design considerations on Solid-State Relays in DC configuration
Solid-state relays uses app note by Vishay in DC application with resistive, capacitive and inductive loads. Link here (PDF) A solid-state relay (SSR) is an electronic switching device in semiconductor technology. An SSR has a high efficient GaAlAs infrared emitter on the input which is optically coupled to the high performance MOSFETs at the output. […]
App note: Solid state relays input resistor selection
SSR or solid state relays input resistor recommendation app note from Vishay. Link here (PDF) Solid state relays (SSRs) are commonly driven by TTL or buffered CMOS logic gates. These gates, when used to sink current, provide adequate drive for SSRs. An open-collector output is not required to drive the SSRs, but it can be […]
App note: Solid state relay parallel and DC operation
Parallel two solid state relays for improved current handling and avoiding imbalance of load distribution are discussed in this an app note from Vishay. Link here (PDF) Vishay solid state relay (SSR) outputs can be wired in parallel enabling the user to benefit from lower on-resistance and higher load currents for AC/DC switching applications. This […]
App note: Solid-State Relays
Solid-state relays introduction from Vishay, Link here (PDF) MOSFET SSRs feature an optocoupler construction, but have a pair of MOSFETs on the output instead of a phototransistor. A pair of source-coupled MOSFETs emulate an electromechanical relay by providing bidirectional switch capability and a linear contact. No output power supply is required.