The Fieldpiece ACH4 400A Amp Clamp Accessory Head is a compact HVAC testing accessory designed for fast and accurate AC amp measurements up to 400A. Built for professional technicians, the ACH4 features an angled jaw claw that helps isolate individual wires quickly for easier testing in crowded panels and tight equipment spaces.
Ideal for checking motor run amps, compressor startup current, blower performance, and general HVAC electrical diagnostics, the ACH4 converts amperage to mVAC for direct meter readings. Its compact size and remote testing capability make it especially useful for hard-to-reach applications during service calls and preventative maintenance.
Compatible with Fieldpiece Stick multimeters, EHDL1 Electronic Handle, EH4W Wireless Handle, DL3 Data Logger, HG2 and HG3 HVAC Guide analyzers, and other compatible digital multimeters with mVAC range capability, the ACH4 is a versatile addition to any HVAC technician’s tool kit.
