Key Features
Works with The Pill by Shelly via 5-Terminal Add-on
Dual-channel DC load control up to 30 V/300 mA per channel
Galvanically isolated solid-state relays for reliable switching
1 configurable I/O (3.3 V logic-level)
Device identification
Device name: SSR Add-on (Accessory for The Pill by Shelly)
Device model: N/A
Short description
Dual-channel control of DC Loads up to 30V.
Controls two independent DC loads up to 30V/300mA per channel using galvanically isolated solid-state relays for enhanced usability.
Requires: 5-Terminal Add-on for connection with The Pill
Main feature
Isolate and control DC loads: Use to control two separate DC Loads, max 30V / 300 mA each.
Device electrical interfaces
Inputs
1 Configurable Digital Input/Output (logic-level 3.3V) - IO3
Outputs
2 potential-free contacts solid-state relay outputs - LOAD1 and LOAD2
Power
Optional Power terminals - 5V, GND
Addon interface
Interface connector for 5-Terminal Add-on for connection with The Pill
Detailed inputs and outputs description
Symbol | Description | Usage |
|---|---|---|
LOAD1 | Channel 1 output | max. 30 V⎓ / 300 mA |
LOAD2 | Channel 2 output | max. 30 V⎓ / 300 mA |
GND | Ground | Reference ground for connected sensors or power supply |
IO3 | Input/Output (logic-level 3.3V) | Configurable for: Digital Input or Digital Output |
5V | 5V Power | Power output for connected peripheral or 5V Power for The Pill |
Physical | |
Size (HxWxD): | 36 mm x 31mm x 11.5mm |
Weight: | 12 g |
Shell color: | Black |
Environmental | |
Ambient working temperature: | 0 to 40 °C / 32 to 105°F |
Storage temperature: | -20°C to 40°C / -5°F to 105°F |
Humidity: | 30 % to 70 % RH |
Max. altitude: | 2000 m / 6562 ft |
Electrical | |
Power consumption: | < 0.6 W |
Max. switching voltage: | 30 V⎓ |
Max. switching current: | 300 mA |
What are the differences between the different generations of Shelly products?
Each new generation adds more power, memory, and features:
Gen 1 offers basic control;
Gen 2 (Plus Series, Mini Series, Pro Series) adds Bluetooth, scripting, and better security;
Gen 3 improves performance, adds Matter (starting from firmware version 1.6.0 or newer) and advanced monitoring;
Gen 4 offers multi-protocol connectivity, featuring Wi-Fi 6, Bluetooth, Zigbee, and Matter.
Can I control the device via Bluetooth?
No, the protocol is used only for device inclusion, allowing for quick and easy setup through the Shelly Smart Control app.
For bluetooth control it is required to have another Bluetooth device such as Shelly BLU Button or Shelly BLU Motion to interact.
Additionally, Shelly devices can function as a BLE gateway, bridging Shelly BLU devices to your Wi-Fi network.
Is it possible to use the device without a hub?
Yes, Shelly devices (except for Wave devices) operate independently without the need for a hub. They connect directly to your Wi-Fi network, and you can control them via the Shelly Smart Control app, web interface, or through integrations with platforms like Google Home, Alexa, Home Assistant and Samsung SmartThings.
Use cases
Low-Voltage Device Control
When you need to switch low-voltage devices, the SSR Add-on lets you control them through The Pill by Shelly.
Automated Valves & Locks
The SSR Add-on lets you automate small solenoids used in door locks, water valves, or simple mechanical latches.
DC Fan & Ventilation Control
For ventilation and cooling setups, you can connect low-voltage DC fans to the SSR Add-on and let The Pill manage airflow automatically.