MTC100A — Alternator Diode / Rectifier Assembly
US$33.06 / pieceIndividual product price. Fitment and freight confirmed separately.
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Automatic voltage regulator
AS440 Compatible Open-Board AVR
SKU GEN-AVR-AS440
An AVR adjusts alternator excitation to regulate generator output voltage. Select it for the alternator and excitation system; similar circuit boards can have different sensing inputs and field ratings.
Online price$31.22 / pieceUSD · Shipping quoted separately
1–4 pieces$31.22
5–19 pieces$29.66per piece
20+ pieces$28.10per piece
Product price excludes freight, tax and import charges. Compatibility and availability are confirmed before payment.
Estimated goods subtotal
Quantity discounts apply to this same item. Freight, taxes and the final supplied version are confirmed in your quotation.Large order or regular supply? Request wholesale terms →- Fitment review before payment
- Freight confirmed by destination
- Shipment after cleared funds
Function & application
Where this type of part is used
- Alternator voltage-control repair
- Replacement of a damaged regulator board
- Workshop diagnosis of unstable or incorrect output voltage
What matters when selecting it
- Identify the alternator before selecting the AVR.
- Compare supply, sensing and field terminals.
- Check frequency and stability settings against the correct manual.
Use the complete model and the original installation details to confirm the replacement. A similar reference number alone does not establish interchangeability.
Product data
Specifications & fitment details
- Catalog reference
- AS440
- Product type
- Automatic voltage regulator
- Supplied version
- Specified in your confirmed quotation
- Package contents
- Exact unit, accessories and quantity listed in the quotation
Original-model identification data
These values identify the original reference. They do not certify a compatible supplied unit.
- Reference model
- STAMFORD AS440, A043Y697 Issue 2
- Sensing input
- 100–130 or 190–264 V AC, single phase; jumper selected
- Nominal frequency
- 50–60 Hz
- Power input
- 100–264 V AC, single phase
- Field output
- Up to 82 V DC at 200 V AC input
- Field current
- 4 A continuous; 7.5 A for 10 seconds. Derate 12% in portrait orientation.
- Field resistance
- 15 ohms minimum; 10 ohms minimum below 175 V AC power input
Details to match before ordering
- Alternator make, model and serial plate
- AVR model and board revision
- Self-excited, auxiliary winding or PMG supply
- Sensing voltage and phase arrangement
- Field output rating and field resistance
- Terminal names, mounting holes and dimensions
Installation & use
A checked installation starts with the correct part
General service guidance for this type of component. Follow the instructions for the confirmed supplied unit and the equipment manufacturer's requirements.
- Stop the set, isolate the electrical supplies and allow stored energy to discharge.
- Record every terminal and existing adjustment position.
- Fit only after the wiring, excitation type and ratings have been matched.
- A qualified technician checks voltage and frequency before applying load.
Documentation
Get the documents for your selected version
Request the matching data sheet, installation instructions, terminal or connection diagram and package list with your enquiry.
Request technical documentsIdentification references
Original manufacturer information is for model comparison. Use the supplied-unit instructions for installation.
Buying from GensetMatch
Price, delivery & after-sales information
How do I confirm the final price?
Send the complete model, quantity and destination. We confirm the supplied version, product amount, freight and any applicable charges in the quotation before payment. Quantity estimates on this page cover goods only.
What is included with the product?
The quotation lists the selected unit and included accessories. Cables, brackets, terminals, manuals and additional parts must be specified; a reference image does not establish package contents.
How much is shipping, and when can you dispatch?
Freight is checked for your destination after packed weight and dimensions are confirmed. Availability and dispatch timing are confirmed in the quotation. We do not promise a stock level or delivery date from a catalog listing.
Shipping information →What warranty and return terms apply?
Ask for the warranty coverage and return terms for the selected supplied unit before payment. Contact us with the order reference, product label and problem details if support is needed.
Returns information →When is the order released for shipment?
The supplied part and total quotation are agreed first. Shipment is released only after finance confirms that the funds have cleared.
Send the part details for a checked quotation
Include the model, old label photos, quantity and destination postcode.