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This SPST solid-state relay module allows for safe switching of DC circuits up to 30 V and 11 A, offering galvanic isolation and low conduction resistance (approx. 30 mΩ) thanks to the use of back-to-back MOSFET transistors. It features fast switching time (up to 1 ms), low control current consumption (approx. 10 mA), and the ability to control a signal from 2.7 to 40 V. Its compact design, lack of mechanical components, and the ability to mount on 2.54 mm connectors or screw terminals make the module a durable and quiet solution for systems requiring reliable insulation and long service life. Pololu 5421
The solid-state relay (SSR) module, SPST type, is a modern solution designed for switching DC circuits on and off based on a control signal in the range of 2.7 to 40 V. Thanks to galvanic isolation between the control circuit and the output, it is safe and resistant to interference. Switching is handled by two back-to-back MOSFET transistors, providing bidirectional current flow and symmetrical output, allowing the module to be used as either a high-side or low-side switch. This version supports currents up to 11 A at voltages up to 30 V, and the total ON-state resistance is about 30 mΩ, minimizing energy losses. The switching time (on and off) is a maximum of 1 ms, ensuring a fast response in most applications.

Thanks to its solid-state design, the module eliminates typical drawbacks of mechanical relays, such as contact wear, sparking, and noise, while offering a compact form factor and silent operation. The control circuit consumes up to 10 mA and can be powered and activated through a single connection (by shorting EN and VIN). The signal pins have a 2.54 mm pitch, making it easy to use with breadboards, while the output provides solder pads for wires or the option to connect 3.5 mm or 5 mm screw terminals. The module has a small size and weight, making it ideal for projects with limited space. It is perfect for power switching in systems requiring signal isolation, as well as for hobby and professional applications where reliability and long life are critical.
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Module with 16 12 V relays with a load of up to 7 A. The board communicates via the Ethernet interface. Numato Lab 16ETHRL001
Module with 16 24 V relays with a load of up to 7 A. The board communicates via the Ethernet interface. Numato Lab 16ETHRL001-24
No product available!
Module with 16 relays 12 V with a maximum switching current of 7 A. Numato Lab RL40003
Module with 16 relays with a maximum switching current of 7 A. It communicates via the USB interface. Numato Lab RL160001
Module with 16 relays and 8 analog inputs. Communicates via the WiFi wireless interface. Numato Lab WFRL160001
No product available!
Module with 2 relays 12 V with a load of up to 7 A. The board communicates via the Bluetooth wireless interface. Numato Lab BTRL002
Module with 2 relays with a maximum switching current of 7 A. Equipped with the ATmega328P microcontroller, it can be programmed in the Arduino IDE. Numato Lab PRLY001
Module with 2 relays 12 V with a maximum switching current of 7 A. Numato Lab RL20002
Module with 2 SSR relays with a load of up to 3 A. The board is equipped with the ULN2003 system and communicates via a digital interface. Numato Lab SSRC20001-DC
Module with 2 5 V relays with a maximum switching current of 2 A. It communicates via the USB interface and does not require an additional power supply. Numato Lab USBPOWRL001
Module with 2 SSR relays with a load of up to 3 A. The board is equipped with the ULN2003 system and communicates via a digital interface. Numato Lab SSRC20001-AC
Module with 2 relays with a maximum switching current of 7 A. It communicates via the USB interface. Numato Lab RL20001
Module with 2 SSR relays with a load of up to 3 A. The board communicates via the USB interface. Numato Lab SSR20001-DC
No product available!
Module with 32 12 V relays with a load of up to 7 A. The board communicates via the Ethernet interface. Numato Lab 32ETHRL001
No product available!
Module with 32 24 V relays with a load of up to 7 A. The board communicates via the Ethernet interface. Numato Lab 32ETHRL001-24
No product available!
Module with 32 relays 12 V with a maximum switching current of 7 A. Numato Lab RL320003
No product available!
This SPST solid-state relay module allows for safe switching of DC circuits up to 30 V and 11 A, offering galvanic isolation and low conduction resistance (approx. 30 mΩ) thanks to the use of back-to-back MOSFET transistors. It features fast switching time (up to 1 ms), low control current consumption (approx. 10 mA), and the ability to control a signal from 2.7 to 40 V. Its compact design, lack of mechanical components, and the ability to mount on 2.54 mm connectors or screw terminals make the module a durable and quiet solution for systems requiring reliable insulation and long service life. Pololu 5421