Nikon XN Transformer 120V Primary 3-6V 3.3A Secondary 30W Variable Voltage

Nikon XN Transformer 120V Primary 3-6V 3.3A Secondary 30W Variable Voltage

The Nikon Model XN is a compact benchtop variable voltage transformer made in Japan. It accepts a 120V AC input and delivers a continuously adjustable low-voltage AC output of 3 to 6 volts at up to 3.3 amps via a front-panel rotary dial. A toggle ON/OFF switch and a 1A/250V fuse provide basic protection, and the unit is UL listed for indoor use.

Specifications & What's Included

• Brand: Nikon
• Model: XN
• Country of Manufacture: Japan
• Manufacture Date: 1981 (per rating label: 4'81)
• Primary (Input): 120V AC, 50/60Hz, 30W
• Secondary (Output): 3–6V AC, variable
• Output Current: 3.3A
• Output Connector: 4-hole socket mounted on the bottom plate
• Voltage Control: Front-panel rotary dial (3–6V range)
• ON/OFF Switch: Front-panel toggle
• Fuse: 1A / 250V (1/4" dia. x 1-1/4")
• Certifications: UL Listed
• Input Cord: Attached gray AC power cord
• Indoor use only (per label)

Applications

The Nikon XN transformer is a low-voltage power supply designed for use with Nikon microscopes and illumination systems that require a variable 3–6V AC source — most commonly as the lamp power supply for older Nikon biological and stereo microscopes from the 1970s and 1980s. The variable output lets the user adjust lamp brightness to suit the application or extend bulb life. This type of dedicated microscope transformer was standard equipment in life science labs, university research settings, and clinical environments during the era when Nikon equipped their instruments with external transformer-based illuminators. Collectors and lab technicians maintaining vintage Nikon microscope systems continue to seek out these units today, as the XN is a direct replacement for many period Nikon stands.