Snap-On Load Detectors / Current Sensors

API Technologies
Part Number Information
Part #: Price/Availability:
LD-5 Buy Now

API’s high sensitivity series of current transformers has been specifically designed for those applications where a low value of current is to be monitored. A primary winding is supplied (pins 1 & 2) which helps increase the sensitivity of the transformer. The revolutionary LD-50 snap-on load detector mounts on pre-wired systems without disrupting existing connections.


  • Broad frequency response: 30Hz to 15 kHz
  • Measures currents up to 40 Amps RMS continuous, 120 Amps intermittent
  • High reliability long lasting magnetic device
  • Output linear to within 3% from 2A to 20A of Input
  • Excellent for low budget energy management and automation control
  • Available pre-assembled or un-assembled, to snap over existing wiring


  • Monitoring relays and lamps
  • Hi/Low current limits
  • Instrumentation
  • Solid state switchgear
  • Motor control