Overview
The Siemens KT8500 control transformer is a Class KT industrial control power transformer designed for factory automation, machine control, and general electrical equipment applications. This single-phase step-down transformer converts higher primary voltages to 120V secondary output, providing isolated control power for panel-mounted control circuits and devices. The unit operates reliably at 50/60 Hz across a wide temperature range, making it suitable for both indoor and outdoor installations in manufacturing, production, and utility environments.
Key Features
- 500 VA power rating – Suitable for typical control circuit loads in industrial panels
- Dual primary voltage (240/480V) – Flexible connection options for standard industrial supply configurations
- 120V secondary output – Standard control voltage for relays, contactors, timers, and PLC power supplies
- Complete kit format – Includes 2-pole primary fuse block with Class CC rejection-type current-limiting fuses and 1-pole secondary K-type fuse block
- Screw terminal connections – Secure, maintenance-friendly connections for reliable panel integration
- NEMA-compliant design – Meets industrial standards for control transformer applications
Technical Specifications
The KT8500 transformer delivers dependable performance across standard industrial frequency ranges with robust thermal performance. All specifications are based on manufacturer data sheets and distributor documentation.
Typical Applications
- Control circuit power for industrial machinery and production equipment
- Panel-mounted power supply for PLC systems and industrial HMIs
- Relay and contactor control voltage in motor starter panels
- Automation system power conditioning in manufacturing facilities
- General-purpose industrial control and instrumentation applications
Compatibility & Replacements
The Siemens KT8500 is a standard Class KT control transformer widely used as both an original equipment component and a direct replacement in industrial control panels. The 500 VA, 240/480V-to-120V configuration is one of the most common control transformer sizes in North American industrial applications. When replacing an existing unit, verify primary and secondary voltage ratings match your panel’s supply and load requirements. The integral fuse blocks and Class CC rejection fuses ensure compatibility with modern control panel safety standards.
