HASS Open Loop Hall Effect Series by LEM

Hall effect, 50 – 600A

Product Description

The HASS series by LEM is an open loop Hall effect device designed for the electronic measurement of DC, AC and pulsed currents with galvanic separation between the primary and secondary circuits.

The HASS series has primary ratings of 50 – 600A and can measure up to ±1100A DC or AC.  A single +5Vdc power supply is required to provide power.  The HASS open loop Hall effect current transducer is 1% accurate (0.5% linearity).  It outputs 2.5V at 0A, outputs 3.125 V at the rated current (positive) and 1.875 at the rated current (negative).

The HASS open loop Hall effect series can monitor DC current and AC currents up to 240 kHz (-3 dB).  It has a fixed offset and can withstand an insulation test voltage of 3300V (1 min).  The HASS has been approved for over voltage category 3 and pollution degree 2.

Note that the HASS series (when ordered from Aim Dynamics) ships with the mating connector!  There is no need to try and specially order the connector, only to get the wrong one, delay your project, etc.


  • Open loop Hall effect measuring device
  • Easy installation
  • Small Size and space saving
  • Single design provides wide range of nominal currents
  • High immunity to external interference
  • Internal and external reference
  • DC to ~240 kHz (-3 dB) frequency range
  • 0.625V output
  • 1% Accuracy
  • 0.5% Linearity
  • Single power supply +5 V
  • Insulation test voltage of 3300 V
  • Fixed offset & sensitivity
  • Galvanic separation between primary and secondary circuit
  • Low power consumption
  • For busbar mounting
  • Aperture: 20 × 10 mm
  • Secondary connection type: Molex 5045-04A
  • Fast response
  • UL Recognized
  • Insulating plastic case recognized according to UL 94-V0

Technical Specs

 HASS Series Technical Specs
HASS 3D Drawing


  • AC variable speed and servo motor drives
  • Static converters for DC motor drives
  • Battery supplied applications
  • Uninterruptible Power Supplies (UPS)
  • Switched Mode Power Supplies (SMPS)
  • Power supplies for welding applications



ISO 9001

rohs compliant

Additional information

Weight.1 lbs
Dimensions3 x 2 x 1 in
Amp Rating

50, 100, 200, 500