EF2 Series Zero Screw™ Connector

By Hirose Electric Co Ltd 141

EF2 Series Zero Screw™ Connector

Hirose's screwless terminal block series significantly reduces electrical wiring time and maintenance workload compared to conventional terminal blocks. The Zero Screw EF2 series features a unique single-action connection design that requires the user to simply push a ring terminal into the connector.

This series is available in five different sizes with five different amperage options including 30 A, 60 A, 150 A, 250 A, and 400 A. The EF2 series has a rated voltage of 600 VAC/DC, a contact resistance of 1 mΩ, and an operating temperature range of -25°C to +105°C. Hirose's Zero Screw connector is well-suited for a wide range of hard-to-access applications including rail, power distribution, machine tools, semiconductor manufacturing equipment, and energy storage systems.


  • Screwless design simplifies installation and maintenance by up to 40% compared to conventional terminal blocks
  • Screwless terminals do not require inspection or retightening to ensure a stable and consistent connection like traditional terminal blocks
  • Safer alternative to traditional terminal block power solutions
  • Unique single-action connection design requires the user to simply push a ring terminal into the connector