Device profile · Specifications & compatibility
Shelly 2L Gen4
Shelly · Relays · Model S4SW-0A2X4EUL
Prices and stock change often on Amazon, so we do not show them here. The button opens the current listing.
- Shelly 2L Gen4 lists Relay Channels: 2; Wet Contact Mode; Matter.
- Check whether the outputs are independently controlled and confirm the rating for each channel.
Browse more from Shelly or explore all relays in our catalog.
- Recorded year
- 2026
- Recorded warranty
- 3 years
- Dimensions
- 41.2 x 42.2 x 16 mm
- Weight
- 30g
The details that shape your choice
Shelly 2L Gen4 Quick Features
Start with these specifications, then check the full details and conditions below.
Make the differences clear
Which device fits your setup?
Choose another model to compare features, connections and requirements side by side.
From specification to decision
Shelly 2L Gen4: Capabilities And Limitations
Based on listed specifications, not hands-on testing. Manufacturer sources are linked where checked.
What it offers
Matter support is listed, making it a candidate for a compatible Matter setup after model and feature checks. Verify the exact device type, firmware and features exposed in your chosen platform. Matter support is not proof of feature parity. The knowledge base states the device is Matter compatible, running Matter over Wi-Fi.
View Matter details →A Home Assistant integration is listed, providing an integration path to verify for the exact model. Check the exact integration and firmware. A catalog integration label does not establish local control, official support or available entities. Via Matter
View Home Assistant details →Apple Home support is listed as an integration option. Check the model, firmware, exposed controls and any additional hardware requirements. Via Matter
View Apple Home details →
What to consider
No specific limitation is established here. Check installation requirements and compatibility before choosing.
Still needs verification
Confirm these details if they matter to your setup.
Questions About Shelly 2L Gen4
How many relay channels does Shelly 2L Gen4 have?
The switch has two lighting channels. A Shelly Bypass 1L/2L Gen4 must be wired in parallel with the load on the first channel. Follow the exact model wiring guide and load limits. Check whether the outputs are independently controlled and confirm the rating for each channel.
Source: Shelly 2L Gen4 manufacturer product page · Checked 2026-10-04
View Relay Channels specifications →Does Shelly 2L Gen4 support wet-contact operation?
Yes, according to the listed specifications. Powered contacts and dry contacts serve different wiring needs. Follow the exact equipment and relay instructions.
View Wet Contact Mode specifications →Does Shelly 2L Gen4 support Matter?
Matter compatibility is specified. A Shelly Bypass 1L/2L Gen4 must be wired in parallel with the load on the first channel. Follow the exact model wiring guide and load limits. Verify the exact device type, firmware and features exposed in your chosen platform. Matter support is not proof of feature parity.
Source: Shelly 2L Gen4 manufacturer product page · Checked 2026-10-04
View Matter specifications →Does Shelly 2L Gen4 work with Home Assistant?
Yes, according to the listed specifications. Check the exact integration and firmware. A catalog integration label does not establish local control, official support or available entities. Via Matter
View Home Assistant specifications →Does Shelly 2L Gen4 work with Apple Home?
Yes, according to the listed specifications. Check the model, firmware, exposed controls and any additional hardware requirements. Via Matter
View Apple Home specifications →Explore the full picture
Shelly 2L Gen4 Specifications
Recorded catalog values. Expand notes for qualifications; unknown values are not treated as missing features.
4 of 46 fields matched to manufacturer documentation. Source checks apply only to the named model and stated scope. Other fields remain catalog data. How we verify specifications →
Features12 fields
| Relay Channels | 2Manufacturer sourceThe switch has two lighting channels. Shelly 2L Gen4 manufacturer product page →
A Shelly Bypass 1L/2L Gen4 must be wired in parallel with the load on the first channel. Follow the exact model wiring guide and load limits. Document check only; not a hands-on test or verification of every regional or firmware variant. |
|---|---|
| Energy Monitoring | No |
| Power Off Memory | Not recorded |
| Wireless Switch Mode | Not recorded |
| Dry Contact Mode | No |
| Wet Contact Mode | Yes |
| Interlock Mode | No |
| Din Rail Mount | No |
| On Off Button | Yes |
| Automations | Yes |
| Zigbee Router | Yes |
| Ota | Yes |
Connectivity7 fields
| 2.4 GHz Wi-Fi | YesDetails & conditionsWi-Fi 802.11 b/g/n (2.4 GHz) |
|---|---|
| 5 GHz Wi-Fi | No |
| Bluetooth | YesManufacturer sourceBluetooth connectivity is documented. Shelly 2L Gen4 manufacturer product page →
A Shelly Bypass 1L/2L Gen4 must be wired in parallel with the load on the first channel. Follow the exact model wiring guide and load limits. Document check only; not a hands-on test or verification of every regional or firmware variant. Details & conditionsBluetooth 4.2 |
| Z Wave | No |
| Zigbee | Zigbee Hub requiredDetails & conditionsZigbee 802.15.4, also acts as a Zigbee repeater |
| Thread | No |
| Radio Frequency | No |
Integrations6 fields
| Google Home | YesDetails & conditionsListed on the official page as Google Smart Home supported (On Off). |
|---|---|
| Alexa | YesDetails & conditionsListed on the official page as Amazon Alexa supported (Toggle Controller). |
| Apple Home | YesDetails & conditionsVia Matter |
| SmartThings | YesDetails & conditionsVia Matter |
| Home Assistant | YesDetails & conditionsVia Matter |
| Matter | YesManufacturer sourceMatter compatibility is specified. Shelly 2L Gen4 manufacturer product page →
A Shelly Bypass 1L/2L Gen4 must be wired in parallel with the load on the first channel. Follow the exact model wiring guide and load limits. Document check only; not a hands-on test or verification of every regional or firmware variant. Details & conditionsThe knowledge base states the device is Matter compatible, running Matter over Wi-Fi. |
Power17 fields
| Ac Power | Yes |
|---|---|
| Ac Load Voltage | 220-240 V |
| Resistive Load | Yes |
| Resistive Maximum Load Power | 200W (O1) / 700W (O2) |
| Resistive Maximum Load Current | Not recorded |
| Inductive Load | YesDetails & conditionsOutput 2 supports fans, which are inductive loads. |
| Inductive Maximum Load Power | Not recorded |
| Inductive Maximum Load Current | Not recorded |
| Capacitive Load | YesDetails & conditionsOutput 2 supports fluorescent lights, whose electronic ballasts present a capacitive load. |
| Capacitive Maximum Load Power | Not recorded |
| Capacitive Maximum Load Current | Not recorded |
| Dc Power | No |
| Dc Maximum Load Power | Not applicable / unspecified |
| Dc Maximum Load Current | Not applicable / unspecified |
| Dc Load Voltage | Not applicable / unspecified |
| Neutral Required | NoManufacturer sourceA neutral connection at the switch is not required. Shelly 2L Gen4 manufacturer product page →
A Shelly Bypass 1L/2L Gen4 must be wired in parallel with the load on the first channel. Follow the exact model wiring guide and load limits. Document check only; not a hands-on test or verification of every regional or firmware variant. Details & conditionsNo neutral wire is needed. A Shelly Bypass for 1L/2L, included in the pack, is required in parallel with the load at the first channel (O1). |
| Idle Consumption | 1.2W |
Safety Features4 fields
| Overheating Protection | Yes |
|---|---|
| Overvoltage Protection | No |
| Overcurrent Protection | Yes |
| Overpower Protection | No |
How this device compares
Shelly 2L Gen4 vs Other Similar Models
Statistical context from 48 relays in this catalog. These figures describe our recorded data, not independent measurements.
Recorded feature coverage
2.4 GHz Wi-Fi: 24 of 48 known answers are Yes
Connectivity: 50% among explicit Yes/No answers; 0 of 48 devices have no resolved answer. Check the specifications for this model’s conditions.
Recorded feature coverage
On Off Button: 17 of 34 known answers are Yes
Features: 50% among explicit Yes/No answers; 14 of 48 devices have no resolved answer. Check the specifications for this model’s conditions.
Recorded feature coverage
Capacitive Load: 18 of 34 known answers are Yes
Power: 53% among explicit Yes/No answers; 14 of 48 devices have no resolved answer. Check the specifications for this model’s conditions.
Brand representation in this directory
17 of 48 models are from Shelly
Counts relays listed here, not sales or market share. Catalog inclusion does not imply a recommendation.
Side-by-side specification comparison
Compare Shelly 2L Gen4 vs Similar Relays
See how Shelly 2L Gen4 stacks up against other relays in this catalog. Compare specifications, compatibility and pricing.
Catalog specifications have not all been independently checked against manufacturer sources. Read our data and evidence methodology.