[Lifetime Warranty] SSR-40DA DC to AC Solid State Relay | Pack of 3

SSR-40DA Solid State Relay Key Features Model: SSR-40DA Type: Single-phase solid state relay Control Input Voltage: 3-32V DC Load Output Voltage: 24-380V AC Maximum Load Current: 40A Switching Method: Electronic, for fast response and long service life Construction: Aluminum heat-dissipating base plate with screw terminals Replaces / Cross-Reference Part Numbers SSR-40DA Replaces solid state relays with matching electrical specifications (3-32V DC control, 24-380V AC load, up to 40A) Compatibility & Fitment Suitable for various AC load switching applications including PID temperature controllers, industrial automation, HVAC systems, and motor controls. Compatible with microcontrollers and PLCs that provide a 3-32V DC output signal. A heat sink is required for loads exceeding 10A to prevent thermal damage and ensure rated performance. When to Replace Relay fails to activate the load when a control signal is present. Relay remains stuck in the "ON" position, keeping the load powered without a control signal. Unit overheats under normal operating conditions (with an appropriate heat sink). Visible damage, such as a cracked housing or corroded terminals. Installation Tips Disconnect all power sources before installation or servicing. Mount the relay on a correctly sized heat sink, especially when switching loads greater than 10A. Apply a thin layer of thermal paste between the relay's metal base and the heat sink for optimal heat transfer. Connect control (input) and load (output) wiring to the correct terminals as marked on the device. Ensure all wire connections are secure to prevent arcing and overheating.