page_title: YASA Limited
section_title: YASA Si400 Controller
hierarchical_section_title: YASA Limited / Products and applications / Standard Motors and Controllers / YASA Si400 Controller
caption_attribution_description: English: 2-speed electric drive unit featuring up to 6000Nm and 300kW peak at wheels from 85kg. Integrated motor, motor controller, clutches, gears, actuation and cooling circuit
context_page_description: YASA is a British manufacturer of electric motors and motor controllers for use in automotive and industrial applications. The company was founded in 2009 by the CTO Dr Tim Woolmer who is also the holder of a number of related motor technology patents.
  Although initial commercial adoption was in high-performance cars, markets for YASA e-motors and generators now include the off-road, marine, industrial and aerospace sectors.
context_section_description: The Si400 controller delivers 200 kVA from a 5-litre package weighing just 5.8 kg (13 lb). The controller features innovative thermal management including dielectric oil cooling and is suitable for use with induction, permanent magnet and axial-flux electric motors. The Si400 became available for sale on 2 April 2019. YASA launches new series of motor controllers
caption: complete 2-speed electric drive unit
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