Military Aviation Metal Sealed DC Russian Relay РЭС49 24V/27V

REC49/RES-49 Metal Relay

Product Overview

The РЭС49/REC49/RES-49 is a high-performance Military Aviation Metal Sealed DC Relay designed as a modern, reliable replacement and upgrade for legacy Russian aviation and military systems. Available in both 24V and 27V coil variants, this component combines the proven P3C series heritage with contemporary manufacturing excellence. As a specialized Military Metal Sealing Relay, it provides robust, environmentally protected switching for critical applications including Aircraft Engine controls, drone flight systems, military communications, and aviation maintenance operations.

P3C49 Military Aviation Metal Relay technical specifications view

P3C49 relay dimensional drawings and application information

РЭС49

RS4.569.421-00	27V	1575 - 2100Ω	8.0mA
RS4.569.421-02	12V	230 - 310Ω	22.0mA
RS4.569.421-04	24 / 27V	~1800Ω	~10.0mA

Product Features & Advantages

The P3C49 delivers enhanced performance while maintaining full compatibility with existing P3C series systems, offering distinct advantages over both original components and standard commercial relays:

Dual Voltage Compatibility: Available in 24V and 27V DC coil versions to match various legacy and modern system requirements.
Enhanced Hermetic Sealing: Advanced metal-can sealing provides superior protection against moisture, dust, and contaminants compared to aging original components.
Military-Grade Construction: Engineered to withstand extreme environmental conditions including vibration (30G+), shock, and temperature extremes from -65°C to +125°C.
Improved Electrical Performance: Lower contact resistance (≤50mΩ initial) and faster switching (≤4ms) than many legacy P3C series components.
Dual-Mode Operation: Capable of handling both power loads (1A at 28V DC) and sensitive signal circuits (10-50µA at 10-50mV) with equal reliability.
Optimized Power Efficiency: Low coil power consumption (0.3-0.43W) reduces thermal load and system power requirements.
Lightweight Design: Weight under 3 grams minimizes impact on system weight budgets in Aviation Applications.

This relay complements YM's comprehensive range of Military Electromagnetic Relay solutions, sharing manufacturing standards with our Aviation Latching Relay and Sealed magnetic Latching Relay product lines.

Technical Specifications

Complete performance parameters showing both compatibility and improvements over legacy specifications:

Electrical Specifications

Coil Voltage Options: 24V DC or 27V DC (specify when ordering)
Contact Configuration: P3C series compatible standard configuration
Contact Rating:
- Standard Load: 1A at 28V DC (minimum 100,000 cycles)
- Low-Level Signal: 10-50 µA at 10-50 mV
Coil Power Consumption: 0.3W to 0.43W
Contact Resistance:
- Initial Value: ≤ 50 mΩ
- After Life Testing: ≤ 200 mΩ

Performance Characteristics

Switching Speed:
- Action Time: ≤ 4 milliseconds
- Release Time: ≤ 4 milliseconds
Operational Life: Minimum 100,000 cycles at rated load
Dielectric Strength:
- Normal Atmospheric Pressure: 500 Vr.m.s., 50Hz
- Low Pressure Conditions: 250 Vr.m.s., 50Hz
Insulation Resistance: > 500 MΩ (initial measurement)

Physical & Environmental Specifications

Sealing Performance: Leakage Rate ≤ 1.0 × 10⁻³ Pa·cm³/s
Weight: < 3 grams
Operating Temperature Range: -65°C to +125°C (standard military grade)
Package: Military-standard metal enclosure

Replacement & Upgrade Implementation

Follow these steps for successful integration as a P3C series replacement:

System Assessment: Identify existing P3C relay specifications and operating conditions in your system.
Voltage Selection: Choose 24V or 27V coil version based on existing system voltage.
Compatibility Verification: Confirm mechanical and electrical compatibility with existing interfaces.
Performance Validation: Test under simulated operational conditions to verify performance improvements.
Documentation Update: Update system documentation to reflect upgraded component specifications.
System Qualification: Perform required qualification testing for your specific application.

Application Scenarios

The P3C49 serves critical functions across multiple military and aviation platforms:

Legacy Military System Modernization: Direct replacement in Russian/Soviet-era military equipment including aircraft, ground vehicles, and naval systems.
Aircraft Maintenance & Overhaul: Replacement component for Aircraft Engine control systems, flight instrumentation, and avionics maintenance programs.
Drone & UAV Systems: Power distribution, payload control, and flight system switching in military and industrial unmanned systems.
Military Communications Equipment: Upgrading communication systems, radar interfaces, and electronic warfare platforms while maintaining compatibility.
Industrial Control Modernization: Replacement in industrial equipment originally designed with P3C series components where continued operation is essential.

Value Proposition for Defense & Aviation

The РЭС49 delivers significant strategic value to military and aerospace organizations:

Extended System Lifecycle: Enables continued operation of legacy systems by providing reliable replacement components.
Enhanced Reliability: Modern manufacturing and materials improve reliability over aging original components.
Supply Chain Security: Provides stable sourcing alternative for components subject to geopolitical constraints.
Performance Improvement: Potential for enhanced performance while maintaining backward compatibility.
Complete Documentation: Full modern technical documentation compared to incomplete legacy specifications.
Cost-Effective Modernization: Enables system upgrades without complete redesign or replacement.