Specifications: The APY412S provides a cost-effective Normally Closed (NC) switching solution in a widely-used SOP-4 package. It is characterized by a 250mA, 60V (AC/DC) rating and a 2Ω on-state resistance, with 2500Vrms isolation ensuring circuit protection. Its operational timing involves a 500μs delay to open (turn-on) and 250μs to re-close (turn-off) the default conductive path. Engineered for consistent performance, it functions across the industrial temperature spectrum from -40°C to 85°C, activated by a 1.2-1.4VDC signal.

Application Scenarios: This relay is commonly deployed in scenarios where a circuit must remain closed for normal operation. Typical applications include maintaining a safety bypass in alarm systems until triggered, providing a default power path in modular equipment that is only interrupted during hot-swap events, and functioning as a pull-up or termination resistor switch in communication buses that are normally terminated.