LUN 2458-8
Static Inverter
Description
LUN 2458-8 aircraft static inverter
LUN 2458-8 is an aircraft single-phase static inverter of Czechoslovak production, associated with Mesit / Technometra aviation equipment manufacturing. The unit converts DC power from the aircraft onboard electrical network into single-phase AC power for aircraft systems and instruments. It is used as a compact semiconductor inverter without rotating parts and is intended for stable power supply of onboard equipment requiring 115 V / 400 Hz alternating current.
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Power conversion function of LUN 2458-8
The main function of LUN 2458-8 is conversion of aircraft DC input voltage into single-phase alternating current. According to the supplied context, the inverter operates from the standard 27–29 V DC aircraft power network and provides 115 V AC at 400 Hz on the output. This output format is typical for aviation instrument, navigation and radio-electronic equipment requiring stabilized high-frequency alternating current rather than direct current from the main aircraft bus.
Application on L-410 and L-39 aircraft
The supplied context indicates that LUN 2458-8 is used on Let L-410 Turbolet regional aircraft and Aero L-39 Albatros trainer aircraft, depending on aircraft configuration and documentation. The inverter may supply indication systems, fuel quantity transmitter circuits, attitude instruments and other units within the flight-navigation and avionics complex. Since equipment fit may vary by aircraft version, modernization and wiring configuration, the exact consumer circuits should be confirmed by the aircraft electrical diagrams and maintenance documentation.
Static semiconductor design of LUN 2458-8
LUN 2458-8 is a semiconductor static converter, which means the conversion process is performed electronically without an electromechanical rotating machine. This construction reduces moving mechanical elements and allows the unit to be installed as a compact aviation power conversion block. The source context describes the unit as a monoblock metal housing with a ribbed cooling radiator. Cooling is passive by air circulation and heat dissipation through the external housing surface.
Installation and connection features
The LUN 2458-8 inverter is built as a compact rectangular aircraft unit. The housing has mounting lugs on the lower panel for bolted installation on an aircraft base, bracket or shock-mounted frame, depending on the installation scheme. The supplied context mentions a square plug connector, such as KSA or PT06 type context, for power input and output connections. During replacement or inspection, technicians should verify connector condition, mounting security, grounding, insulation and output voltage / frequency under load.
Identification and ordering of LUN 2458-8
When ordering LUN 2458-8, the full designation should be specified to avoid confusion with other LUN-series aircraft converters, including three-phase 36 V units and other inverter versions. The buyer should confirm the aircraft type, required condition, documentation package and whether the unit is needed as serviceable, overhauled, as-stored or for repair / exchange. Related checks may include input voltage compatibility, output voltage, connector type, mounting configuration and required certification documents.
LUN 2458-8: identification and purpose
LUN 2458-8 is classified as a Static Inverter and converts aircraft DC power into AC with the required parameters without a rotating motor-generator. Select it by the complete designation, series, execution, marking and approved documentation. Similar lettering, housing or connector geometry does not establish identical operating data.
This historical category contains several types of transducing devices. PT, PO and PTS products relate to electrical-power conversion, while PMI, PMT and PMM designations identify vacuum-gauge transducers. Each page therefore follows the actual product function rather than the broad category name. A suffix, series number or extra letter can indicate a materially different circuit, pressure range, rating or interface.
Function and operating circuit
The item converts aircraft DC power into AC with the required parameters without a rotating motor-generator. Exact input and output conditions depend on the execution. For a power converter, verify voltage, current type, frequency, phase arrangement, rated output, connectors and cooling. For a vacuum transducer, verify the measurement principle, pressure range, operating mode, vacuum connection and compatible measuring instrument.
Numerical values retained from the original catalogue record appear in Technical Details and must be compared with the passport for the actual unit. An aircraft platform or installation system is not assigned by analogy when a reliable source is unavailable.
Selection and compatibility checks
Before replacement, compare the primary and alternative designations, series, input and output ratings, dimensions, mass, connectors, mounting, cooling and documented environmental limits. For a vacuum sensor, additionally compare the conversion constant, emission current or heater resistance where the passport specifies those values.
Related members of one family may use different voltage, frequency, power, pressure range, mounting interface or purpose. The related links below support catalogue navigation and do not establish interchangeability. General technical background is available under Static Inverter.
Incoming inspection and installation
Check the marking and supporting records, housing, connectors, terminals, vacuum fitting, mounting points, seals and any evidence of overheating, impact or corrosion as applicable. Bench testing must follow the documentation for the exact execution; an improvised test voltage or vacuum regime can damage the product.
Install the unit only in the intended circuit with the documented polarity, supply mode, load, cooling and safety provisions. After installation, complete the prescribed functional check. External integrity alone does not demonstrate serviceability or calibration.
Related catalogue positions
Functionally related catalogue products include LUN 2456.01-8, POS-1000A, PTS-25M, PTS-250. They are selected by actual type and family for navigation and do not imply compatibility. More positions are available in the Power Transducers category.
Enquiry information
An enquiry for LUN 2458-8 should state the exact designation, quantity, required condition, marking photograph, delivery scope and required documents. When available, include the designation of the equipment and item being replaced. Price, actual availability, lead time and condition of a specific unit are confirmed separately.
Technical details
Product Type: Static Inverter
Primary Designation: LUN 2458-8
Alternative Designations: LUN 2458-8; LUN2458-8; LUN 2458 8; ЛУН 2458-8
Function: converts aircraft DC power into AC with the required parameters without a rotating motor-generator
Selection Basis: Exact designation, execution, marking and documentation for the specific equipment
Application: Only as supported by the passport, illustrated parts catalogue or approved installation documentation
Interchangeability: Not established by a related designation, matching base, housing or appearance alone
Inspection: Verify electrical ratings, contacts or connector, mounting, construction and required operating mode
Enquiry Data: Designation, quantity, condition, marking photograph, delivery scope and required documents
Documentation: Product passport and approved operating or repair documentation
Category: Power Transducers
All specificationsCollapse specifications
Retained Technical Data:
Product Type: Single-phase aircraft static inverter / DC-to-AC converter
Designation: LUN 2458-8
Alternative Designations: ЛУН 2458-8, LUN2458-8, LUN 2458.8
Function: Conversion of aircraft DC power into single-phase AC power
Application / Where Used: Aircraft onboard electrical and avionics power system
Compatible Aircraft / Equipment: Let L-410 Turbolet and Aero L-39 Albatros according to supplied context and aircraft documentation
Manufacturer Context: Mesit / Technometra, Czechoslovak aviation equipment production context
Input Current Type: Direct current
Input Voltage: 27–29 V DC, according to supplied context
Nominal Aircraft Power Network Context: 28 V DC aircraft power system
Output Current Type: Single-phase alternating current
Output Voltage: 115 V AC
Output Frequency: 400 Hz
Conversion Type: Semiconductor static conversion, without rotating parts
Cooling: Passive air cooling through ribbed radiator housing
Housing Type: Compact rectangular monoblock metal housing
Mounting: Lower mounting lugs for bolted installation on aircraft frame or base
Connector Context: Square plug connector, KSA or PT06 type context according to supplied data
Related Powered Equipment: Indication systems, fuel quantity transmitter circuits, attitude instruments, navigation and avionics equipment depending on aircraft configuration
Weight Reference: Approximately 1.5–3.2 kg for equipment of this class, depending on shielding and version
Technical Documentation: Product passport, test report, serviceability certificate, storage records and aircraft maintenance documentation if available
Payment & delivery
Orders ship from our hub in Dubai. Partner stock is first transferred to Dubai, then shipped to you.
Dubai stock: 100% before dispatch. Partner stock (Remote stock) and Pre-order: 50% advance payment to start the order and 50% before shipment from Dubai to you.
Availability, lead time, delivery cost and payment terms are confirmed for your order before payment.
Payment & delivery terms