Features 【Specification】Starting Current / Frequency, Range: 0.2-30A, 40-400Hz, Startup Time: <0.1 Seconds, Switch Contact Capacity: Maximum: 0.5A@12-240VAC/DC, Overload Capacity: +100%@30A, Threading Hole Diameter: 8mm, Working Temperature: -20~55 °C, Working Humidity: 0-90%, No Condensation, IP Rating: IP30 【Ideal Choice】Compared with traditional device, thermal protectors and other devices, flameproof sensing relay has the advantages of high accuracy, stable performance and long service life. An ideal choice for automated industrial equipment and power monitoring 【Safe and Quick】The current sense switch is for safety, simple, and convenient monitoring or detection of current in the electrical equipment 【Advanced Tech】Using the principle of electromagnetic mutual inductance of current, the advanced output detection, monitoring and protection alarm products developed by the non-power supply technology are adopted 【Wide Use】This self-powerd switch is widely used in substation, frequency conversion speed control device, inverter device, electrolytic plating, electric locomotive, street lamp monitoring, coal mine and other automation industries that need current monitoring. Specification: Switch Type:Normally Open/Normally Closed(Optional) Power Supply:Self-Powered,No External Power Supply is Required. Starting Current / Frequency Range: 0.2-30A, 40-400Hz Startup Time: &lt;0.1 Seconds Switch Contact Capacity: Maximum: 0.5A@12-240VAC/DC Overload Capacity: +100%@30A Threading Hole Diameter: 8mm Indicator Light: Red and Green Installation Form: Guide Rail 35mmDIN Shell Material: Fireproof ABS Working Temperature: -10~50°C Working Humidity: 0-90%, No Condensation IP Rating: IP30 Size:52 x 68 x 25mm / 2.05 x 2.68 x 0.98in Package List: 1 x Sensing Switch 1 x Users Manual(Chinese &amp; English) Package List