Small, compact and very tough, the model MN185 is designed for measurements from 50mA to 120AAC. The "clothes pin" shape makes it ideal for use in tight areas, such as breaker panels, controller panels or outlets. It is an excellent companions to all DMMs. The model MN185 works as a traditional current transformer (with 1000:1) and provides current outputs (mA) for use with DMMs, recorders or instruments with current ranges. The model MN185 permits true RMS measurements when used with a True RMS instrument. The model MN185 uses special magnetic cores to provide higher accuracy and lower phase shift. Applications: electrical utility, HVAC, industrial maintenance, laboratory, plant maintenance. 150A Nominal range. 50mA to 150A Measurement range. 1000:1 Transformation ratio. 1mAAC/AAC (120mA at 120A) Output signal. 170A continuous Overload. 30Hz to 10kHz Frequency range. 5 Ohms max Load impedance. 250VAC/30VAC Working/Common mode voltage. Jack Output termination. 0.78" Jaw opening. 0.47" Diameter maximum conductor size. Dimensions: 1-33/128" width by 4-67/128" height by 111/128" depth. Weight 5.6oz. Operating temperature: 13 degree to 122 degree F. Storage temperature: -40 degree to 176 degree F.