Stamford AS440 AVR (Genuine)

Ensure stable voltage output and dependable power generation with the Genuine Stamford AS440 Automatic Voltage Regulator (AVR). Designed by Stamford (STAMFORD | AvK), the AS440 is an analog, 2-phase sensing, half-wave phase-controlled thyristor-type AVR built specifically for brush-less AC synchronous generators.

It forms an integral part of the excitation system for Stamford alternators, maintaining precise generator output voltage despite varying loads and operating temperatures. Buying genuine Stamford guarantees factory-level reliability, full component protection, and optimal transient performance for your generator set.

Key Features & Highlights:

• 100% Genuine Stamford: Factory-original OEM component engineered for exact compatibility and performance standards.
• 2-Phase Sensing: Delivers superior voltage regulation and stability across variable loads.
• Under-Frequency Roll-Off (UFRO): Protects the generator during engine underspeed conditions (50Hz or 60Hz operation).
• Quadrature Droop Input: Supports parallel operation with other similarly equipped generators.
• Surface Mount Design: Compact, robust build designed to withstand harsh vibration and thermal environments.

Technical Specifications:

• Sensing Input: 120V (95–132V) or 240V (190–264V), 1 phase, 2 wire
• Frequency: 50–60 Hz nominal
• Power Input: 100–264V AC, 1 phase, 2 wire
• Output Voltage: Max 82V DC @ 200V AC input
• Continuous Output Current: 4A DC (7.5A transient for 10 seconds)
• Voltage Regulation: $<\,\pm 1.0\%$ (with 4% engine governing)