Solid State Relay SSR-40DA DC to AC Input 3-32VDC Output 24-380VAC 40A Single Phase Semi-Conductor Relay Module - Pack of 3 - Control 3-32V DC Load 24-380V AC

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
• Package Contents: 3 x SSR-40DA relays

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.