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Relays are used to protect a circuit from a high voltage that exceeds the value of the board’s max input/output. There are different types of relays that can either create contacts, break contacts or even a combination of the two. Some examples of relay variants are solid state relays, reed relays and control relays.
Relays
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SP485EEP 1/1 Transceiver Half RS422, RS485 8-PDIPZAR 23.56 ZAR 20.49
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UDN2981A-T Power Switch/Driver 1:1 Bipolar 500mA 18-DIPZAR 57.93 ZAR 50.37
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