Emirel E363 is a PTC thermistor protection relay designed to safeguard motors and transformers from overheating. It continuously monitors the resistance of up to six series-connected PTC sensors, tripping when the resistance exceeds approximately 3.3 kΩ. The relay includes both manual and automatic reset modes, selectable via a jumper, providing versatile protection for industrial applications.
Features
- Monitors up to 6 series-connected PTC thermistors for temperature rise
- Trip threshold: ≈3.3 kΩ; reset below ≈1.8 kΩ
- Selectable reset mode: manual or automatic (jumper configurable)
- LED indication for power (green) and fault/trip (red)
- SPDT relay output rated 5 A @ 230 VAC; high insulation strength
- Compact 17.5 mm DIN rail housing with screw terminals
Technical specifications
| Model | E363 |
| Function | PTC thermistor protection relay |
| Number of sensors | 1 to 6 PTC thermistors (series connection) |
| Trip resistance | ≈3.3 kΩ typical |
| Reset resistance | ≈1.8 kΩ typical |
| Reset mode | Manual or automatic (jumper-selectable) |
| Supply voltage | 230 VAC ±10 %, 50/60 Hz |
| Power consumption | 2 VA |
| Output | 1 relay, SPDT 5 A @ 230 VAC resistive |
| Indicators | Green LED (Power), Red LED (Trip) |
| Housing | 17.5 mm DIN rail module |
| Operating temperature | -20 to 70 °C |
| Standards | CEI-EN 61010-1; CEI-EN 61326-1 |


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