M121
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28815309-M121
4-CHANNEL RELAY MODULE(STM32)
The current rating of a contact is defined as the current level that creates a certain temperature rise of the contact spring — usually 20°C or 30°C. Both electrical and thermal factors govern the heat created by the current.
a group of products which fulfill a similar need for a market segment or market as a whole.
The maximum switching voltage of a relay is the maximum voltage that can be across the contacts whether the relay is open or closed. Operating a relay with high voltages present can cause arcing, and this in turn erodes the contacts and eventually degrades contact performance.
a particular group of related products.