Befaco – ON/OFF Module & Trolley Bus – Full DIY Kit

£135.00 (Excl. VAT)

Integral 110 Watts power solution – ready to feed the hungriest Eurorack systems!

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SKU: Bundle_Befaco_Trolley_Bus Categories: , Brand: HP Size: 4 HP


ON/OFF is a power switch breakout module for connecting to the Trolley Bus power system. The Trolley Bus is an integral 110 Watts power solution, that is ready to feed the hungriest Eurorack systems out there!

The full system is composed of:

  • Power Bus: with 5A on +12V, 2,5A on -12V and 4A on +5V distributed on 28 Slots. Top and bottom connector row are independent, allowing quiet modules to be isolated from noisy modules.
  • ON/OFF 3U Breakout, with heavy duty illuminated push button, two USB Chargers and panel mounted 2.5mm DC jack IN.
  • Elegant and ultra slim AC adapter. Universal IN 100 to 240v, 135w OUT

Provided adhesive standoffs allow you to install the trolley bus on unpowered cases without drilling any holes.


  • 25 mm height over regulators grid and 15 mm height on the rest of the bus
  • Horizontal connectors to maximise space
  • 2,5mm barrel power connector
  • On/Off 4HP module
  • 2 USB-A charging ports


  • Power brick: 135W 2.5mm Barrel connector centre positive (included)
  • Current: +12V: 5A, -12V: 2,5A, 5V: 4A
  • Measurements: 423 mm x 80mm
  • Module Width 4HP

Trolley Bus – Build Document | User Manual | ON/OFF Schematic | Trolley Bus Schematic

Additional information

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