BESTEP 1-Channel 3.3V Relay Module with Optocoupler Isolation for Arduino Boards

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Description

Normally open interface maximum load: AC 250V/10A, DC 30V/10A.

SMD optocoupler isolation provides strong driving capability and stable performance; trigger current 5mA.

Fault-tolerant design ensures the relay remains inactive even if the control line is broken.

Features a power indicator (green) and a relay status indicator (red).

The user-friendly interface allows direct connection via wiring terminals for convenience.

Two Module Interface

• DC+: Connects to the power supply positive pole (voltage 3.3V).
• DC-: Connects to the power negative pole.
• IN: Low level (3.3V) control relay pull in.

Relay Output Terminal

• NO: Relay normally open, suspends before pulling in, then short-connects with the COM.
• COM: Relay common interface.
• NC: Relay normally closed, short-connected with COM before pulling in and suspended after.

Package Includes:

1 x 1 Channel 3.3V Relay Module