5pcs PTC Heater 110V 200°C Ceramic Stone Aluminum shell 50x30x5mm

1.In consideration of thermal expansion, there should be some gap around the PTC heaters
2. For heaters of surface-electrified type, it should be aware that safety distance is necessary to keep away from body, metals and frost. Comparatively, the surface-insulation type is more reliable in safety.
3. When heaters connected to three-phase supply, the middle point should be connected with null line so that terminal voltage would not exceed due to imbalance of voltage.