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Fluke I400 AC current clamp with 1.5 m cable and right-angle banana plugs

Fluke

Fluke I400 AC Current Clamp 400 A measurement tool

SKU CH-A3YQ-WW0YJ

AC current clamp measures up to 400 A without breaking the circuit, outputting 1 mA per amp for direct DMM reading and rated CAT IV 600 V / CAT III 1000 V

  • Measures up to 400 A AC without breaking the circuit
  • 1 mA/A output gives direct reading on any DMM
  • CAT IV 600 V / CAT III 1000 V safety rating
  • Soft non-slip overmold handle prevents accidental contact with live wiring
  • Fits conductors up to 32 mm with 1.5 m output cable

Compact AC Current Clamp for Multimeters

The Fluke I400 is an AC current clamp that connects to a digital multimeter via shrouded 4 mm right-angle banana plugs. It measures alternating current from 1 A to 400 A without breaking the circuit, delivering a 1 mA per Amp output that reads directly on the meter display. The clamp accepts conductors up to 32 mm in diameter and includes a 1.5 m output cable for flexible positioning.

Safety Rating and Handling

This model carries a CAT IV 600 V and CAT III 1000 V safety rating, the highest available for a clamp of this type. A soft, non-slip overmould handle reduces the chance of accidental contact with live wiring during use. The clamp operates from 0 °C to 50 °C and can be stored between -20 °C and 60 °C, with humidity tolerances of 95 % up to 30 °C, 75 % up to 40 °C and 45 % up to 50 °C.

For Electricians and Technicians Extending DMM Range

The I400 suits professionals who need to measure up to 400 A AC on existing Fluke or compatible multimeters without interrupting power. It is not for users who require DC current measurement, higher AC ranges beyond 400 A, or direct-reading displays that do not rely on a separate meter.

Highlights

  • Measures up to 400 A AC without breaking the circuit
  • 1 mA/A output gives direct reading on any DMM
  • CAT IV 600 V / CAT III 1000 V safety rating
  • Soft non-slip overmold handle prevents accidental contact with live wiring
  • Fits conductors up to 32 mm with 1.5 m output cable

Specifications

BrandFluke

Questions about this item

Will the 1.5 m output cable or banana plugs need periodic replacement?

The 1.5 m cable and shrouded 4 mm right-angle banana plugs have no scheduled replacement interval; inspect the insulation and connectors for damage before each use and replace only if wear or cracking is visible.

What limits continuous operation when measuring near the 400 A AC upper range?

The clamp is rated for continuous current from 1 A to 400 A AC; sustained use at the top of this range is limited by the 50 °C maximum operating temperature and the 32 mm maximum conductor size.

How much heat does the clamp generate during all-day use and does it need cooling?

The clamp produces no measurable self-heating because it draws power only from the measured conductor; keep ambient temperature below 50 °C and observe the humidity derating (95 % RH at 30 °C, 75 % at 40 °C, 45 % at 50 °C).

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