Customer:
We have purchased some 333023 relays. On the input side there are 4 pins: VCC, IN1, IN2, GND. What is the required voltage for VCC? Can you provide a guide for the different options of this product that may be available and the corresponding part numbers?
Originally submitted via email support on 15 March 2026. Migrated to the forum for community visibility.
Soldered Support:
The IN pins can work with 5V or 3V3: Relay - Hardware details | Soldered Documentation
Relay boards are available in:
The hardware specs are valid for the 1, 2 and 4 channel boards; they differ only in the number of input/outputs.
The “1 channel with qwiic” board is controlled via I2C or with a qwiic cable for an error-proof connection. An Arduino library is available for it, which may be easier to use in some cases.