CT6875A AC/DC Current Sensor


Supports Current Measurement of Inverters with High Current and High Speed


CT6875A – AC/DC Current Sensor. Cable length: 3 m (9.84 ft.)
CT6875A-1 – AC/DC Current Sensor. Cable length: 10 m (32.81 ft.)


Hioki’s pass-through type AC/DC current sensors can be connected directly to Hioki Power Analyzers and Memory HiCorders. Also, it can be connected to Power Meters, Oscilloscopes, DMMs, etc. by using an optional sensor unit.

The CT6875A has a frequency bandwidth of DC to 2 MHz (Model CT6875A-1 is DC to 1.5 MHz) and a rated current of 500 A. It is used for R&D, quality evaluation, manufacturing, and maintenance in markets such as wireless charging systems, inverter motors for industrial equipment, power conditioners for PV, and quick charging facilities for EVs.

Use with an instrument with a high input impedance of 1 MΩ or higher.

Key Features

  • High accuracy (amplitude): [DC]±0.048 %, [50 Hz/60 Hz]±0.048 %
  • High accuracy (phase): [50 Hz/60 Hz]±0.08°
  • Strengthened shield improves noise resistance to accurately measure current buried in noise
  • Flat frequency characteristics and CMRR performance to achieve high accuracy measurement
  • More enhanced environmental resistance performance than ever before with operating temperature range of -40 to 85°C
  • Good frequency characteristics over wide band of DC to 2 MHz (amplitude) and DC to 1 MHz (phase)
  • Ideal for advanced fields such as photovoltaics and fuel cells to evaluate the charge / discharge of batteries and secondary side of inverters
  • Connect with oscilloscopes or Hioki Memory HiCorders (using SENSOR UNIT) to monitor waveforms
Rated current 500 A AC/DC
Max. allowable input Within the derating range, up to ±150 A peak (design value) allowed at 40°C or less for 20 ms or less
Frequency bandwidth Amplitude: DC to 2 MHz (CT6875A), DC to 1.5 MHz (CT6875A-1)
Phase: DC to 1 MHz
Basic accuracy (DC, 45 Hz ≤ f ≤ 66 Hz) Amplitude: ±0.04 % rdg. ±0.008 % f.s., Phase: ±0.08°
Output voltage rate 4 mV/A rated (This device outputs AC+DC voltage via the Sensor Unit)
Max. rated voltage to earth 1000 V AC/DC (50/60 Hz, CAT III )
Core diameter φ 36 mm (1.42 in)
Operating temperature, humidity -40°C to +85°C (-40°F to 185°F), 80% RH or less (with no condensation)
Power supply Power suppled via the Power Analyzer PW8001, PW6001, PW3390, or Sensor Unit CT9555, CT9556, CT9557
Max. rated power 7 VA max. (at 500 A/55 Hz)
Dimensions and mass 160 mm (6.30 in)W × 112 mm (4.41 in)H × 50 mm (1.97 in)D, CT6875A: 800 g (28.2 oz), cable length 3 m (9.84 ft), CT6875A-1: 1100 g (38.8 oz), cable length 10 m (32.81 ft)
Included accessories Instruction Manual ×1, Mark bands ×6, Operating Precautions ×1

Compatible models

Compatible models CT6875A
Power Analyzer
PW8001, PW6001, PW3390
Power Analyzer
Attention (Requires CT9901)
Power HiTester
3193 series
Attention (Requires CT9901)
Current Unit
Attention (Requires the 9318, CT9901)
3CH Current Unit U8977 OK