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Extech MA250: 200A AC Clamp Meter + NCV

AC Clamp-on meter with Integrated Non-Contact Voltage Detector

The compact Extech MA250 200 amp AC/DC clamp meter offers maintenance technicians, electricians, and DIYers a test instrument that delivers a high level of features and value. In addition to a host of core multimeter and current measurement capabilities, it also features a built-in non-contact voltage (NCV) detector. The heart of the MA250 is a full-function digital multimeter. Measurement functions cover most types of troubleshooting over and above noninvasive current probe measurements: voltage, resistance, capacitance, frequency, duty cycle, diode and continuity tests. Even measure temperature with the supplied Type K bead wire temperature probe. MA250 comes with test leads, general-purpose Type K bead wire temperature probe, two AAA batteries, carrying case, user manual, and one-year limited warranty.



  • Built-in non-contact Voltage detector with LED alert to quickly check for the presence of live wires before testing
  • 1.2″ (30mm) jaw size for conductors up to 500MCM
  • 4,000 count LCD display
  • Multimeter functions include AC/DC Voltage, Resistance, Capacitance, Frequency, Temperature, Duty Cycle, Diode, and Continuity
  • Relative Mode for Capacitance Zero and Offset Adjustment
  • Data Hold and Auto Power Off
  • Complete with test leads, general purpose Type K bead wire temperature probe, two AAA batteries, and carrying case


Specifications Range
Display counts 4000 count LCD
Jaw size/Cable size 1.2″ (30mm); 350MCM
AC Current 20A, 200A
Max Resolution 0.01A (AC)
Basic ACA Accuracy (% rdg) ±2.5%
AC Voltage (Max Res.) 600V (0.1mV)
DC Voltage (Max Res.) 600V (0.1mV)
Resistance (Max Res.) 40.00MΩ (0.1Ω)
Capacitance (Max Res.) 100µF (0.01nF)
Frequency (Max Res.) 10kHz (1Hz)
Temperature -4 to 1400°F (-20 to 760°C)
Duty Cycle 0.1 to 99.9%
Diode/Continuity Yes
Data Hold Yes
Min/Max Min/Max
Dimensions/Weight 7.9×2.6×1.5″ (200x66x37mm)/ 7.2oz (205g)


  • 480172 – AC Line Splitter
  • TL803 – General Purpose Test Leads
  • TL805 – Double Injected Test Leads
  • TL809 – Electronic Test Lead Kit
  • TL810 – Electrical Test Lead Kit
  • TL808-KIT – Professional Test Lead Kit
  • TL900 – SafeSense™ CAT IV Fused Test Leads
  • TL831 – Master Electrical Test Lead Kit
  • TL833 – Industrial Test Lead Set
  • TL841 – Test Lead Kit
  • TL806 – Double Insulated Alligator Clips
  • TL807 – Insulated Alligator Clips
  • TL807C – Insulated Alligator Clips
  • TP873 – Bead Wire Type K Temperature Probe (-22 to 572°F)


MA250 English Datasheet

MA250 English User’s Manual

MA250 CE Declaration of Conformity