Unbranded 120V Isolation Transformer 1:1 PRI 120V SEC 120V Ground Pin Cut

Unbranded 120V Isolation Transformer 1:1 PRI 120V SEC 120V Ground Pin Cut

This is an unbranded 120-volt isolation transformer with a 1:1 turns ratio, taking in 120V AC on the primary side and delivering 120V AC on the secondary side. Isolation transformers break the direct electrical connection between the primary and secondary circuits, providing a degree of protection against shock and noise for connected equipment. The unit is built around a laminated steel core in a compact gray metal enclosure with mounting feet/brackets for chassis or bench installation.

Specifications & What's Included

• Type: Isolation Transformer
• Primary voltage: 120V AC
• Secondary voltage: 120V AC
• Turns ratio: 1:1
• Construction: Laminated core, gray steel enclosure with mounting feet
• Input: Attached cord with 2-prong plug — ground pin has been cut; ground prong is missing
• Output: Attached cord with 3-prong NEMA-style receptacle (blade slots and ground slot present)
• Mounting: Bracket feet for chassis or surface mounting
• Brand: Unbranded (no manufacturer markings visible)

Applications

Isolation transformers like this one are used in electronics service and repair work, audio equipment, laboratory benches, and industrial settings where electrical isolation between the line supply and the load is needed. In a service bench context, they protect both the technician and the equipment under test from direct connection to the AC line — a common practice when working on equipment that lacks its own internal isolation. They are also used to reduce hum and noise in audio systems by breaking ground loops. A 1:1 120V unit is one of the most common formats for general-purpose bench use in North American AC environments.