| CPU | ESP-Shelly-C38F |
| Flash | 8MB |
| AC power supply | 110 - 240 V~ 50/60 Hz |
| Neutral is not required | Yes or no |
| External protection | 2A |
| Maximum switching voltage | 240 V~ |
| Maximum switching current | 2 A/240 V~ |
| Voltmeter (AC) | ±2% |
| Ammeter (AC) | 0-80 A |
| Ammeter accuracy | ±2 % (2 - 50 A), ±2 % (1 - 2 A), ±5 % (0 - 1 A) |
| Compatible current transformers | CT 50A (included in the package)
Counter 80A |
| Power and energy meters | Active and apparent power
Active and apparent energy
Power factor
Fundamental active energy and fundamental reactive energy |
| Minimum channel-to-channel calibration load | 500 watts |
| No-load threshold | 30 VA per channel |
| Storage of measurement data | At least 10 data resolution days of 1 minute |
| Data export | CSV for recorded PQ values
JSON format export via RPC |
| Working temperature | -20 °C to 40 °C / -5 °F to 105 °F |
| Humidity | 30% to 70% of relative humidity |
| Device power consumption | < 1.2W |
| Intelligent on/off | Yes |
| Local and remote control | Yes |
| Intelligent scenes | Sunrise / Sunset |
| Weekly programming | Yes |
| UL Listed Option | No |
| Communication | WiFi 2.4 GHz
Bluetooth 4.2 |
| Material | Plastic |
| Internal temperature sensor | Yes |
| Schedules | Yes |
| Webhooks (URL actions | 20 with 5 URL per hook |
| Script | Yes |
| TMTQ | Yes |
| Encryption | Yes (Transport level) |
| Authentication | Yes (Application and transport level) |
| Dimensions | 37 x 42 x 16 mm |
| Weight | EM Gen3 - 23 g
CT 50A - 50 g |
| Current clamp | |
| Accuracy | 1% |
| Core | Ferrite core |
| Electric force | 3000VAC 1mA 60s |
| Inner diameter | 10 mm |
| Load resistance | 20Ω |
| Rated primary current | 50A |
| Rated secondary current | 16.67mA |
| Saturation current | ≥85A |
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