V-502 (3.215.546)

V-502 rectifier unit in KURS MP-70 equipment

The V-502 is an aircraft rectifier power supply unit used with KURS MP navigation and landing equipment. Its task is straightforward: it takes aircraft AC power and supplies DC voltage to the connected radio navigation units. In the aircraft, this is not a navigation receiver and not an indicator. It is part of the electrical support circuit for the system. The unit is usually considered together with the KURS MP-2 or KURS MP-70 equipment set, receiver blocks, cockpit indicators, wiring, and avionics rack installation.

Power conversion function of the V-502 unit

The V-502 converts AC input from the aircraft electrical system into stabilized DC output used by onboard navigation and landing equipment. This DC supply is needed for units working in course and glide path channels, where unstable power can affect system operation or lead to incorrect fault tracing during maintenance. The rectifier itself does not process radio signals. It only provides the required electrical supply for the equipment around it.

V-502 in KURS MP-2 and KURS MP-70 systems

The rectifier is associated with KURS MP-2 and KURS MP-70 instrument landing and navigation systems. These systems are used for en route radio navigation and approach tasks on aircraft equipped with Soviet and Russian avionics architecture. In such installations, V-502 works as one of the supporting electrical modules. If the system has power-related faults, technicians normally check the rectifier together with input supply, load circuits, connectors, grounding, receiver units, and the aircraft wiring diagram.

Aircraft installation of V-502 rectifier

The V-502 is installed in aircraft avionics power circuits, normally in or near avionics racks where KURS MP equipment is mounted. The exact location depends on the aircraft type and modification. Civil and military transport aircraft fitted with KURS MP-2 or KURS MP-70 may have different rack layouts, cable routes, and connector arrangements. For replacement, it is better to confirm the part number and drawing number from the aircraft documentation rather than rely only on the system name.

Identification and ordering of V-502

Before ordering a V-502 rectifier, the marking on the unit should be checked against the aircraft parts catalog, system documentation, or product passport. The unit may also be referenced by drawing number 3.215.546. If the aircraft documentation lists a different execution or a modified rack configuration, the power output and connector match should be confirmed before supply. The product is also known under alternative designations V-502 and 3.215.546.

Product Type: Aircraft rectifier power supply unit
Part Number: V-502
Drawing Number: 3.215.546
Function: Conversion of AC power to stabilized DC voltage
Application / Where Used: KURS MP-2 / KURS MP-70 systems
System / Installation Area: Aircraft avionics power circuits
Input Voltage: 109–121 V AC, 400 Hz
Output Voltage: 27 ±2.4 V DC at 0.2 A load; 27 ±1.8 V DC at 0.5 A load
Operating Current Range: 0.2–0.9 A
Weight: Not more than 2.2 kg
Technical Documentation: Manufacturer passport

All shipments are carried out from our international warehouse in Dubai (UAE), as well as from our partners’ remote warehouses.

In Stock — items available in stock at the Dubai warehouse are dispatched within 5–10 business days after receiving 100% prepayment.

Remote Stock — items available at our partners’ remote warehouses are supplied within an average of 30–45 business days after receiving 100% prepayment.

Pre-Order — made-to-order products are manufactured and delivered within an average of 45–60 business days. Payment terms: 50% advance payment to start production, with the remaining 50% paid before dispatch from the Dubai warehouse after full readiness for shipment.

Returns & Changes (Restocking Fee)
For selected items, a RESTOCKING FEE of 10% may apply in case of return, order cancellation, or changes to the order specifications. This condition applies only to certain products and is confirmed at the order approval stage.

Warranty
All products are covered by a standard 6-month warranty.
Extended warranty is available upon request and is agreed individually; it may affect the final product price.