POPULACE
Generator Automatic Voltage Regulator Stamford AVR AS440
Model: AS440
Compatible AS440 generator AVR at factory wholesale price. 100% bench-tested, 13-month warranty, in stock. Request wiring diagram, datasheet & quote.
| Warranty | 13 months |
|---|---|
| Place of Origin | Fujian, China |
| Brand Name | POPULACE |
| Model Number | AS440 |
| Overall Size | 175×150×65mm |
| Weight | 0.4kg |
| Certification | CE,ISO9001 |
| Technical Data | 1phase or 3 phase 220V |
| Capacitor Color | Blue Capacitor, Red for option |
Applications
- Standby and prime diesel generator sets fitted with Stamford alternators in telecom, data-centre and hospital backup power
- Commercial and industrial gensets requiring stable output voltage under varying load
- Alternator rewinds and rebuilds where the original AVR is obsolete or damaged
Product Description
Generator Automatic Voltage Regulator Stamford AVR AS440
General Features
 | Generator Automatic Voltage Regulator Stamford AVR AS440 As440 is a half wave phase controlled thyristor type AVR and form part of the excitation system for a brushless generator. -The design employs Surfacce Mount Technology for high intergration of feature in a small footprint AVR. -The AVR has the facility for droop CT connection,to allow parallel running with other sinilarty equipped generators. |
 | Features *Voltage regulation < ± 1%. * Soft start voltage ramping. * Sensing voltage loss protection. * 120 or 240 Vac sensing, jumper selectable. * Under frequency roll off protection. * With under frequency LED indicator. |
| Product Name | Automatic Voltage Regulator 220 volt 1 Phase Generator AVR AS440 | |
| Sensing/Power input | Voltage | 120(95-132Vac)240(190-264Vac),1 phase 2 wire jumper selectable |
| Frequency | 50/60 Hz jumper selectable | |
| Output | Voltage | Max. 90 Vdc @ 207 Vac input |
| Current | Continuous 4A,Intermittent 6A for 10 seconds | |
| Voltage Regulation | < +/-1% (with 4% engine governing) |
Connection Diagram
There are no reviews yet.
Be the first to review “Generator Automatic Voltage Regulator Stamford AVR AS440”
Your email address will not be published. Required fields are marked *
Related Products
Compatible generator parts & matching system accessories.
Technical Guides & Troubleshooting
Engineering diagnostics, terminal wiring diagrams, and parts replacement procedures.
Stamford SX460 vs MX341 vs AS480: Which AVR Does Your Alternator Really Need? (2026 Engineering Guide)
Selecting between Stamford SX460, MX341, and AS480 AVRs depends on your alternator frame, excitation source (Shunt, PMG, or EBS), and load profile. Here is the full engineering breakdown.
Read Guide → Engineering GuideGenerator AVR Not Producing Voltage: 5 Causes and How to Test Them
A generator that runs but produces no power is most often an excitation or AVR problem. Here are the five causes we see most in the field, the multimeter check for each, and when the regulator itself needs replacing.
Read Guide →FAQ
Stamford AVR AS440 is an Compatible replacement. Send a photo of your alternator nameplate (model, voltage, frequency) and our engineers confirm the match against AS440 before dispatch.
Yes. Output voltage, stability adjustment and protection functions are bench-tested on every unit, and the test record travels with your order.
Stamford AVR AS440: overall size 175×150×65mm, shipping weight approx. 0.4kg. Send your panel or packing constraints and we confirm fit.
Stamford AVR AS440 is covered by a 13 months factory warranty. Quality issues within the term are replaced or repaired at our cost.
Stamford AVR AS440 carries CE,ISO9001 certification from our ISO9001-certified Xiamen facility.
Yes. POPULACE Electronic Co., Ltd. manufactures generator parts in Xiamen, Fujian - factory visits are welcome.
Yes. Samples are available for testing; express freight (FedEx, DHL, UPS, TNT, Aramex) typically delivers within 3-7 days.
In-stock items ship 2-3 days after payment; larger batches are produced in 3-7 days. Sea, air or express shipping is arranged to your preference.
T/T, PayPal, Western Union, MoneyGram, Alibaba order link and RMB transfer are all supported.
Yes. Detailed terminal connection wiring diagrams and user manuals for AS440 are available upon request. Contact our technical support with your generator setup to receive the documentation.
The technical datasheet and complete specification sheet for AS440 can be provided directly by our sales team. Contact [email protected] or submit an inquiry to receive the PDF specification.
20 Years Experience for Genset Parts
POPULACE has 20 years of experience supplying generator parts worldwide — reliable, OEM-compatible, and built for continuous operation.
Get a Quote