Single Phase AC-AC High Voltage 90A Solid State Relay (SSR) is a specialized electronic component designed for controlling alternating current (AC) in a single-phase electrical system. Unlike conventional electromagnetic relays that rely on mechanical contacts, a solid-state relay uses semiconductor devices like thyristor or triacs for switching operations. The “high voltage” designation indicates that this particular relay is engineered to handle elevated voltage levels commonly found in industrial or specialized applications.
The “90A” specification denotes its maximum current-carrying capacity, meaning it can manage up to 90 amperes of electrical current. This makes it particularly suitable for controlling heavy loads in situations where precise and swift switching is essential. Solid-state relays are favoured for their durability, reliability, and the absence of arcing, which can occur in mechanical relays and lead to wear over time. They are extensively employed in applications such as industrial automation, heating systems, motor controls, and various other scenarios where accurate and robust switching of high-power AC loads is a requirement.
These headings can help you choose SSRs based on their key attributes
Model | A Rating | Input | Output | Control Voltage | Control Current Range | Pick-up Voltage | Turn-on (max) | Turn-off (max) | Drop Out Voltage | Input Resistance | Current Range with proper heat sink(IT) | Surge Current non-repetitive t = 10msecs (ITEMS) | Voltage Drop @ Current (VTM) | Voltage Range (VRMS) | Over Voltage Rating (PIV) Transient Peak | Off-state leakage current @ voltage – (IDRM) | Holding current (IH) | Dv/Dt @Voltage (out) | I2T Fusing I2t (10 ms) (Value In Square) | Frequency Range | Dielectric Strength | Galvanic Separation (Input to Output to Base) | Weight | Storage Temp. | Junction Temperature |
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