Shelly SSR Add-on – Accessory 2-gang relay for The Pill by Shelly multi-purpose input module

The SSR Add-on is an expansion module for The Pill by Shelly, enabling remote control and scheduling of low-voltage devices. The module features a dual-channel solid-state relay (SSR) output with galvanic isolation, ensuring safe operation in various DC control applications.

The SSR Add-on is an ideal choice for controlling low-power devices such as LEDs, fans, valves, or other DC loads below 30V. Thanks to the wear-free operation of solid-state relays, it provides long lifespan and reliable switching, making it especially suitable for frequent switching cycles.

The module integrates seamlessly into the Shelly Pill ecosystem and, when combined with Shelly platform features such as automations, scheduling, or MQTT integration, offers a flexible DIY automation solution. It is primarily recommended for advanced users or those building custom control systems.

About the Shelly brand

Shelly is one of the most well-known smart home brands, recognized for its open integration capabilities and advanced automation solutions. Its products are especially popular among Home Assistant and DIY communities.

Key product features

Dual-channel SSR relay: Two independent outputs for control
Galvanic isolation: Safe operation with external circuits
Wear-free switching: Long lifespan without mechanical relays
Low-voltage control: Ideal for DC devices
Expandability: Extends the functionality of The Pill by Shelly

Electrical features

Number of outputs: 2 (SSR)
Switching voltage: max. 30 V DC
Switching current: max. 300 mA per channel
Isolation: Galvanic
Power supply: Via The Pill by Shelly device

Technical specifications

Product name: Shelly SSR Add-on
Type: Dual-channel solid-state relay (SSR) expansion module
Size: 36 × 31 × 11.5 mm
Weight: 12 g
Color: Black
Outputs: 2 potential-free SSR outputs (LOAD1, LOAD2)
Max. switching voltage: 30 V DC
Max. switching current: 300 mA per channel
Digital I/O: 1 configurable (IO3, 3.3V logic level)
Power supply: 5V (5V, GND connectors)
Ground: GND reference point
Power consumption: < 0.6 W
Operating temperature: 0°C – +40°C
Storage temperature: -20°C – +40°C
Humidity: 30–70% RH
Max. installation altitude: 2000 m
Interface: 5-terminal add-on connector for The Pill device
Application: Control of two separate DC loads (max. 30V / 300 mA)

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