The A6303 Current Probe is a 100 A, DC to 15 MHz current probe. This probe must be used with an AM 503, AM 503A, AM 503B or AM 5030 current probe amplifier. Bandwidth DC to 15 MHz Peak Pulse 500 A Max AC p-p 200 A Derate above 20 kHz Max DC 100 A Display Range 5 mA to 50 A