Stamford AS440 Regulator - Unused Alternator Disassembled - ORIGINAL

Stamford AS440 Regulator: Original, removed from an unused alternator

This AS440 is an original Stamford part, removed from a new, unused alternator (it is not a repaired or remanufactured part). The AS440 is a self-excited analog AVR with two-phase sensing and surface-mount technology (SMT), which replaces the older SX460/SX440. It comes standard on Stamford S4 and HC5 alternators and is optional on the UC22/UC27 models.

Technical characteristics

• Part number: RP3021369
• Manufacturer: Stamford (original), disassembled part from a new, unused alternator
• Type: Analog AVR, self-excited, 2-phase sensing, SMT technology
• Compatible alternators (original equipment): Stamford S4, HC5 (standard); UC22, UC27 (optional)
• Sensing: 100–130 V AC or 190–264 V AC, selectable via jumper, single-phase, 50–60 Hz
• Output: max. 82V DC at 200V AC input, 4A continuous, 7.5A intermittent (10s), minimum resistance 15Ω
• Regulation: ±1%
• Start-up voltage (build-up): 4 V at the AVR terminals
• Power dissipation: 12 W maximum
• Analog input: max. ±5 V DC, sensitivity 1 V = 5% generator voltage (adjustable), input resistance 1 kΩ
• Quadrature droop input: max. sensitivity 0.07 A for 5% droop at 0 PF, max. input 0.33 A
• Overexcitation protection: 75 V DC, 10- to 15-second delay (fixed)
• Low-frequency protection (UFRO): setpoint 94–981 TP4T Hz
• External voltage adjustment: ±10% with a 1 kΩ, 1 W potentiometer
• Typical response: AVR 20 ms, field current at 90% in 80 ms, machine voltage at 97% in 300 ms
• Operating temperature: -40°C to +70°C
• Storage temperature: -55°C to +80°C
• Relative humidity: up to 95% at 0–70°C
• Permissible vibration: 20–100 Hz, 50 mm/s; 100 Hz–2 kHz, 3.3 g
• Weight: 0.3 kg
• Dimensions: 14 x 10 x 5 cm
• Country of origin: United Kingdom

What does «Removed» or «disassembled» mean?
This is an original Stamford 100% part, removed from a new alternator that has never been in service (it is not a used or repaired replacement part). If you have any questions about its condition or origin, contact us at.