Current Clamp

Expand your diagnostic capabilities with the TOPDON AC/DC Current Clamp. Engineered for non-intrusive automotive electrical troubleshooting, this high-precision current probe allows technicians to measure current flow from 20mA up to 650A without disconnecting wires or interrupting vehicle circuits.

Featuring a standard BNC output connector, the TOPDON Current Clamp integrates seamlessly with automotive oscilloscopes, lab scopes, and advanced diagnostic scope tools (including the TOPDON Phoenix Scope). Whether diagnosing stubborn parasitic battery drains, capturing fuel injector current waveforms, or testing starter motor draw, the CCLAMP provides real-time, high-speed signal transmission for fast, accurate electrical diagnostics.

Key Features & Benefits

• Non-Intrusive Testing: Clamps directly around isolated conductors to measure AC and DC current without cutting wires or opening the circuit.
• Dual Measurement Ranges: Features selectable measurement modes to handle both low-current precision work (1mV/10mA range up to 65A) and heavy-duty current testing (1mV/1A range up to 650A).
• Universal BNC Connection: Standard BNC connector plugs directly into oscilloscopes and lab scope accessories for live waveform analysis.
• Zero-Adjustment Button: One-touch zero/tare button eliminates residual magnetic offset prior to low-amperage testing.
• LED Power Indicator: Built-in low battery and power status LED ensures reliable readings during extended diagnostic sessions.

Applications & Circuit Use Cases

• Parasitic Drain Testing: Pinpoint small amperage leaks causing dead batteries without resetting ECU sleep cycles.
• Fuel Injection & Ignition Diagnostics: View live current ramp-up waveforms for fuel injectors, COP ignition coils, and solenoids.
• Fuel Pump & Motor Testing: Inspect electric fuel pump motor humps and brush wear patterns.
• Starting & Charging Systems: Perform starter cranking current draw tests and verify alternator output under full load.