The STACO E501VA is a 500 VA variable autotransformer (Variac) that delivers adjustable AC voltage output through manual control. Engineered for panel mounting, this unit accepts 120 VAC input and produces 0–120 VAC or 0–140 VAC output depending on configuration. With a laminated silicon steel toroidal core and precision ground commutator, the E501VA suits testing, experimentation, prototyping, and laboratory voltage adjustment applications.
Technical Specifications
• Power Rating: 500 VA
• Input Voltage: 120 VAC
• Output Voltage: 0–120 VAC or 0–140 VAC (model-dependent)
• Maximum Current Load: 5 A
• Core: Laminated silicon steel toroidal
• Winding: Single layer, magnet wire
• Commutator: Precision ground, plated track
• Brush: Carbon tap element
• Dimensions: 4.380″ L × 3.750″ W × 3.000″ H (111.25 mm × 95.25 mm × 76.20 mm)
– Key Features
• Manual voltage adjustment via carbon brush contact
• High-temperature foundation material for superior heat dissipation at brush contact area
• Enhanced thermal transfer to core assembly improves transient and short-term overload tolerance
• Panel-mount design with adjustable shaft for variable panel thickness
• Available in cased or uncased configurations
• Single-phase or three-phase variants supported
• Includes dial plate, knob, lockwashers, and mounting hardware
– Typical Applications
• Voltage control and adjustment in electrical test circuits
• Equipment prototyping and development
• Industrial and commercial testing environments
• Laboratory experimentation and research
• Educational demonstration systems
– Compatibility & Integration
Terminal-based input and output connections enable straightforward integration into test benches and control panels. Stacked unit configurations require aligned brush assemblies. The 501 Series design accommodates manual operation with provisions for future motor-drive upgrade paths.
