Varian 135935 4 kVA 120VAC Power Supply Regulator Board Assy Rev G

Varian 135935 4 kVA 120VAC Power Supply Regulator Board Assy Rev G

The Varian 135935 is a 4 kVA, 120 VAC power supply regulator board used in Varian scientific and industrial systems. This type of regulator board conditions and controls AC power within a larger instrument or equipment chassis, providing stable regulated power to downstream subsystems. The assembly number is 135935-68, Revision G, as silkscreened directly on the PCB.

Specifications & What's Included

• Manufacturer: Varian
• Assembly Part Number: 135935-68
• Revision: Rev G
• Power Rating: 4 kVA
• Input Voltage: 120 VAC
• Board Type: Power Supply Regulator PCB
• Form Factor: Card / PCB module
• Connectors: Three card edge / multi-pin connectors (labeled J1, J2, J3 on PCB silkscreen)
• Notable components: Multiple DIP ICs, array of blue multi-turn trim potentiometers, large electrolytic capacitor, yellow film capacitor, red LED indicators
• What's included: Board only

Applications

Varian Medical Systems and Varian Scientific Instruments have long produced a range of vacuum, semiconductor, and analytical equipment — including ion implant systems, vacuum pumping systems, and analytical instruments — that rely on internal power supply regulator boards like this one to manage and regulate AC power to internal subsystems. Regulator boards of this type control voltage levels, protect sensitive downstream electronics, and provide filtering and conditioning of the incoming AC line. The 135935 board would have been installed in a Varian system chassis and interfaced with the host system through its multi-pin card edge connectors. These boards are primarily sought as direct replacement parts for servicing Varian equipment still in use in semiconductor fab, research, and industrial environments.