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Small green circuit board with a black rectangular relay and pin headers

Adafruit

Adafruit Latching Mini Relay FeatherWing 2A 250VAC engineering development tool

SKU CH-2X6N-BB2HB

A latching relay FeatherWing that switches up to 2 A at 30 VDC or 250 VAC using only two pulsed pins

  • TypeEngineering Development Tools
  • Control high-voltage appliances from any Feather board
  • Latching relay holds state without continuous power
  • Pulse SET or UNSET pin for 10ms to switch
  • Switches up to 2A at 30VDC or 0.3A at 250VAC
  • Fully assembled and tested for immediate development

Latching Relay FeatherWing for Feather Boards

This FeatherWing adds a latching relay to any Feather development board, allowing control of external AC or DC loads. It connects via stacking or female headers and uses only two microcontroller pins for operation. The module arrives fully assembled and tested, ready for immediate integration into prototypes.

Sustained Operation with Pulse Control

The latching mechanism requires a 10ms pulse on either the SET or UNSET pin to change state, then holds that position without continuous power. If system power is lost, the relay remains in its last setting, preserving the load state. This behaviour suits battery-powered or intermittent-duty applications where constant coil current is undesirable.

Switching Limits and Thermal Behaviour

The relay switches up to 2A resistive at 30VDC or ~40VAC, .6A at 110VDC, .5A at 120VAC, and .3A at 250VAC. Reactive or inductive loads require derating beyond these figures. The board itself draws negligible power while latched, and the relay housing dissipates minimal heat during normal switching cycles.

Points forts

  • Control high-voltage appliances from any Feather board
  • Latching relay holds state without continuous power
  • Pulse SET or UNSET pin for 10ms to switch
  • Switches up to 2A at 30VDC or 0.3A at 250VAC
  • Fully assembled and tested for immediate development

Caractéristiques

TypeEngineering Development Tools

Questions sur cet article

How much power does the latching relay draw when it stays on all day?

The latching relay only needs a 10 ms pulse on the SET or UNSET pin to change state, so it draws no coil current while holding position.

Which Feather boards and headers must I already have to use this FeatherWing?

Any Feather board works; you connect the wing with Feather Stacking Headers or Feather Female Headers and use two GPIO pins for SET and UNSET.

Can I keep my existing 120 VAC devices and switch them with this relay?

Yes, at 120 VAC the relay handles up to .5 A resistive; check the datasheet for inductive loads and derate accordingly.

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