# Gravity: Magnetic Latching Relay for ESP32 / Arduino

**Type:** Product page · **SKU:** DFR0996 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/gravity-magnetic-latching-relay-for-esp32-arduino.html ([markdown](https://core-electronics.com.au/gravity-magnetic-latching-relay-for-esp32-arduino.html.md))

This DFRobot magnetic latching relay is a new type of relay. It remains in the last position it was when last powered and features noiseless and low power...

## Pricing

- **Price:** $11.85 (inc GST) — $10.77 AUD, exc GST
- **Quantity discounts:** 6+ $10.24 (exc GST) · 12+ $9.80 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 1 today, and up to 48 more in 8–12 days.

## Description

A Magnetic latching relay is a new type of relay. It features low power dissipation and noiseless. Unlike other non-latching relay, the latching relay needs two digital pulse signal to switch ON/OFF state.

This DFRobot Gravity: magnetic latching relay is compatible with most popular microcontrollers such as [ESP32](https://core-electronics.com.au/development-boards/esp32.html) / [Arduino](https://core-electronics.com.au/arduino.html) / [Raspberry Pi](https://core-electronics.com.au/raspberry-pi.html). It can be used to remake home appliances or lighting controls, like smart electricity meters, lighting, sockets, switches, and so on.

### What is magnetic latching relay?

 A latching relay is an automatic switch that stays in its last position when powered off, acting as a memory circuit. It helps reduce power consumption in applications compared to non-latching relays that consume more power. Latching relays have noiseless switching while non-latching relays hum. Magnetic latching relays are ideal for low power and high stability applications due to their low power, steady performance, long service life, and low-temperature rise.

### Latching or Non Latching Relay?

Choosing between a latching or non-latching relay depends on the specific requirements of the application. Latching relays are preferred for applications that require low power consumption and low noise levels, while non-latching relays are more economical for situations where a short time delay is needed. The decision should be made by the designer after careful consideration of the application's needs and available options

![Magnetic Latching Relay and Arduino Connection Diagram](https://core-electronics.com.au/attachments/localcontent/ConnectionDiagram_14164cd6862.png)

### Connection Diagram of Magnetic Latching Relay and Arduino

### Features

- Low power consumption, 2.6mw-3.65mw
- Noiseless
- Trigger Pulse Width: 2ms
- Holding function
- 3.3V & 5V supported Arduino / ESP32 / Raspberry Pi / LattePanda
 
### Applications

- Remaking home appliances
- Lighting controls
- Smart electricity meters
- Smart lighting
- Smart sockets
- Smart switches
 
### Specification

- Signal Level: 3.3V, 5V
- Power Voltage: 3.3V-5V DC
- Trigger Pulse Width: 2ms
- Static Current: 0.73mA - 0.8mA(@3.3V-5V)
- Coil Operating Current: 137mA(3.3V), 93mA(5V)
- Contact Resistance: =100mΩ (1A 6V DC)
- Contact Material: AgSnO2
- Contact Load: 10A 36V AC (Resistive), 15A 36V AC (Incandescent lamp)
- Max Switching Voltage: 36V AC/30V DC
- Max Switching Current: 10A
- Max Switching Power: 36VA/300W
- Coil Rated Power: 0.4W
- Relay Action Time(@Rated Voltage): =8ms
- Relay Reset Time(@Rated Voltage): =5ms
- Operating Humidity Range: 5%-85%RH
- Operating Temperature Range: -40°C - 85°C
- Product Dimension(Package Not Included): 42×32mm/1.65×1.26”
 
### Documents

- [Product wiki](https://wiki.dfrobot.com/SKU_DFR0996_Magnetic_Latching_Relay)
 
### Parts List

- Magnetic Latching Relay ×1
- 3Pin Gravity Wire ×2

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/D/F/DFR0996-1.jpg)