Features [Self-powered] This current sensing switch is self-powered, no external power supply is required. [Action current] Its action current is 0.5-200A AC, which can be adjusted by a potentiometer. [Direct tube working status] The LED indicator can conveniently and intuitively indicate the working status of the switch. [High Power] High-power MOS tube non-contact electronic switch. [Wide applications] This AC current sensing switch is widely used in automation industries that require current monitoring, such as substations, frequency conversion equipment, inverter equipment, electrolytic plating, street lamp monitoring, etc. SZC03 series AC current sensing switch is designed and manufactured to solve the AC current monitoring. It uses the principle of mutual inductance to sense the AC straight-through current, isolate the AC current, and output a normally open or normally closed switching signal to directly control various automation industrial equipment, such as flash, buzzer, relay, single-chip or other power load equipment. Compared with traditional mutual inductors, thermal protectors and other devices, using this device can not only get more accurate and more timely control, but can also greatly simplify the design and reduce costs. Specification: Model: SZC03-NC-AL-CH Power supply: Not required Rated load: 0.3A@135V AC/DC Input straight-through current: 0.5-200A AC Switch on minimum: 0.5±0.2A Maximum overload of straight-through current: 200% Accuracy: 10% Power consumption: ≤1W Leakage current: ≤1mA Hysteresis: ≤1% Response time: ≤200ms Working environment: -30~70℃, 0-95%RH Dimensions: 62*90*25.5mm / 2.4*3.5*1.0in Hole diameter: 20mm / 0.8in Package weight: Approx. 84g/2.96oz   Package l ist: 1 * Current Sensing Switch   Note : 1. Due to the difference between monitors and light effects, the pictures may not reflect the actual color of the item. 2. Please allow slight error due to manual measurement. Thanks for your understanding. Package List