Finder 7S.14.9.012.4220 Solid State Relay, 1 NO, 12V DC Input, 3A Output

For low-power DC switching tasks that demand silent operation and long life, the Finder 7S.14.9.012.4220 solid state relay replaces mechanical contacts with an optically isolated semiconductor output. It switches up to 3 A across a 3–33 V DC load when driven by a 12 V DC control signal, making it suitable for PLC outputs, automation controllers, and other logic-level circuits.

Who is it for

Automation engineers, panel builders, and electronics designers who need a compact PCB-mount relay with fast response and no contact wear. It is particularly useful where mechanical relays would generate audible noise or fail prematurely due to frequent switching.

Main features

• Solid state output: 1 normally open (NO) contact, DC load only
• Control voltage: 12 V DC, input current 10 mA
• Rated output current: 3 A, output voltage range 3–33 V DC
• Optical isolation between input and output, dielectric strength 2500 V AC
• Turn-on and turn-off time less than 0.1 ms
• Reverse polarity protection on input
• Operating temperature range: -40 °C to +85 °C
• PCB mount, compact size

Specifications

• Type: Solid state relay
• Series: 7S.14
• Contact configuration: 1 NO
• Input type: DC
• Output type: DC
• Input voltage: 12 V DC
• Input current: 10 mA
• Output current (max): 3 A
• Output voltage range: 3–33 V DC
• Isolation: Optical
• Dielectric strength (input-output): 2500 V AC
• Turn-on time: < 0.1 ms
• Turn-off time: < 0.1 ms
• Operating temperature: -40 °C to +85 °C
• Mounting: PCB
• Protection: Reverse polarity (input)

Tips

Ensure the load current does not exceed 3 A and that the load voltage stays within 3–33 V DC. Because the output is a semiconductor, it has a small leakage current when off; verify compatibility with sensitive loads. Use a heat sink if operating near the maximum current and ambient temperature.