JZC-1M RG4.553.029 27V Military Metal Sealed Relay – Direct Replacement for Russia Relay, DPDT for Aviation & Drone Systems
Product Overview
The JZC-1M RG4.553.029 is a hermetically sealed, military‑grade Metal Sealing Relay designed as a direct form‑fit‑function replacement for obsolete Russian relays (e.g., RG4.553.029 series). This Military Metal Relay features a DPDT (2 Form C) contact configuration, 8‑pin metal can package, and 27V DC coil (compatible with 28V aircraft systems). With ultra‑low coil power consumption (0.3–0.43W), fast operate/release time (≤4ms), and high dielectric strength (500Vrms), the JZC‑1M is ideal for flight control, drone power distribution, avionics, radar, and engine management systems. Its glass‑to‑metal sealed construction guarantees leakage ≤10⁻³ Pa·cm³/s, protecting internal contacts from moisture, fuel vapors, and altitude pressure changes. As a core product in YM’s Military Relay portfolio – which includes Polarized Relay, Latching Relay, PCB Board Relay, Automotive Relay, and Industrial Power Relay – the JZC‑1M delivers uncompromised reliability for legacy upgrades and new defense programs.
Technical Specifications
Coil Parameters (27V DC)
- Coil power consumption: (0.3–0.43)W – ultra‑low for a DPDT military relay
- Nominal coil voltage: 27V DC (compatible with 28V aircraft systems)
- Pick‑up voltage (max): 75% of nominal
- Drop‑out voltage (min): 10% of nominal
- Coil resistance (at 25°C): Approx. 1700–2400Ω
Contact Ratings (DPDT – 2 Form C)
- Maximum switching current (resistive): 1A at 28V DC (reference test condition)
- Low level switching capability: (10–50)μA, (10–50)mV – 1×10⁵ operations, ideal for dry circuits
- Initial contact resistance: ≤50mΩ; after life test ≤200mΩ
Timing & Isolation
- Action time (operate): ≤4ms (typical ≤3ms)
- Release time: ≤4ms
- Dielectric strength (normal atmosphere): 500Vr.m.s., 50Hz between contacts and case; under low pressure: 250Vr.m.s.
- Insulation resistance (normal atmosphere): >500MΩ at 500V DC; after high‑level life test: >50MΩ
Mechanical & Environmental (Military Grade)
- Weight: <3g – lightweight for airborne use
- Sealing (leakage rate): ≤10⁻³ Pa·cm³/s (hermetic, glass‑to‑metal seal)
- Operating temperature range: -65°C to +125°C
- Shock & vibration: Withstands 50g, 6ms half‑sine; 10‑2000Hz, 20g random vibration per MIL‑STD‑810
- Terminal style: 8‑pin metal can (gold‑plated) – matches Russian relay footprint
All parameters are validated at 25°C ambient. The JZC‑1M meets MIL‑PRF‑39016 requirements and is fully interchangeable with RG4.553.029 and equivalent Russian relays.
Key Features & Advantages – Direct Russia Relay Replacement
- Exact replacement for RG4.553.029: Same pinout, mounting dimensions, and electrical ratings – no redesign required for legacy Russian equipment.
- Hermetic metal sealing (≤10⁻³ Pa·cm³/s): Glass‑to‑metal seal protects against moisture, salt spray, fuel vapors, and altitude changes – ensures reliable operation in unpressurized aircraft bays and drone compartments.
- Ultra‑low coil power (0.3–0.43W): Reduces heat generation and power supply load – ideal for battery‑backed avionics and long‑endurance drones.
- Fast switching (≤4ms) & high isolation: 500Vrms dielectric strength and >500MΩ insulation prevent crosstalk in mixed‑signal environments.
- Wide temperature & vibration tolerance: -65°C to +125°C and 20g vibration meet RTCA/DO‑160 and MIL‑STD‑810 – suitable for fighters, drones, helicopters, and ground vehicles.
- Excellent low‑level signal switching: Gold‑plated contacts reliably switch down to 10μA / 10mV – perfect for sensor multiplexing, avionics I/O, and mission computers.
YM’s engineering advantage: The JZC‑1M leverages advanced magnetic circuit technology from our Latching relay and Polarized Relay families, ensuring consistent contact force and minimal bounce. As a true Military Metal Relay , it outperforms obsolete Russian relays in hermeticity and contact life. For complete system integration, YM also offers Aviation Microswitch, Aviation Rocker Switch, and Military Aviation Connector – a one‑stop solution for defense upgrades.
How to Use the JZC-1M (Russia Relay Replacement) – Step by Step
- Verify pinout compatibility: Compare the JZC‑1M pinout diagram with your existing RG4.553.029 socket – they are identical (DPDT, 8‑pin metal can base).
- Remove old relay: Desolder or unplug the existing Russian relay from the PCB or socket. Clean the pads/socket with isopropyl alcohol.
- Install JZC‑1M: Insert the new relay into the socket or PCB holes. Ensure correct orientation (pin 1 indicator).
- Solder (if PCB mount): Use 60/40 rosin‑core solder, iron temperature ≤260°C, duration ≤5 seconds per pin. Avoid flux ingress.
- Coil drive: Apply +27V DC to the coil pins (observe polarity). The relay will energize when voltage exceeds 20.25V (75% of nominal).
- Functional test: Energize the coil and measure contact resistance across each pole (should be ≤50mΩ). De‑energize and verify insulation >10MΩ between open contacts.
Pro tip for logistics: YM provides a full technical data package including CAGE code, NSN assignment support, and full traceability – simplifying military procurement and sustainment.
Application Scenarios & Key Buyer Benefits
Typical Military & Aerospace Applications
- Legacy aircraft modernization: Replace obsolete Russian RG4.553.029 relays in MiG, Su, Il‑series aircraft – improves reliability without wiring changes.
- Drone power distribution & flight control: Battery isolation, payload switching, and flight termination systems – lightweight and hermetically sealed.
- Radar & communication shelters: Signal routing and power switching in field‑deployable systems – withstands humidity and dust.
- Missile & weapon systems: DPDT configuration allows redundant arming circuits and guidance signal switching.
- Industrial control & railway: Drop‑in replacement for Russian relays in European and Asian industrial equipment – long‑term availability.
Direct Value to International Buyers (Defense OEMs, MROs, System Integrators)
- Eliminate obsolescence: Direct replacement for RG4.553.029 – ensures continued operation of legacy platforms without requalification.
- Reduced lifecycle cost: Hermetic sealing and low coil power reduce field failures and power consumption – lowers total ownership cost.
- Simplified logistics: One relay replaces multiple Russian relay variants – reduces spare parts inventory.
- Global compliance: Manufactured under AS9100D, RoHS/REACH compliant, with MIL‑PRF‑39016 test data – accepted by NATO and allied forces.
For large‑scale upgrades, YM offers pre‑qualified drop‑in kits including relay, socket, and mounting hardware. Engineering samples available for qualification testing.
Certifications & Compliance
- MIL-PRF-39016 (hermetic, signal relay) – qualification data available.
- RTCA/DO-160G (environmental conditions for airborne equipment): tested for temperature/altitude, vibration, humidity, and salt spray.
- MIL-STD-810G (environmental – shock, vibration, temperature extremes).
- ISO 9001:2015 & AS9100D certified manufacturing (aerospace quality management).
- RoHS 2011/65/EU & REACH (EC 1907/2006) compliant – full material declaration.
- Hermeticity: 100% tested per MIL‑STD‑883, method 1014 – leak rate ≤10⁻³ Pa·cm³/s.
Each production lot is 100% inspected for coil resistance, pick‑up/drop‑out voltage, contact resistance (each pole), dielectric strength, and insulation resistance. Sample relays undergo destructive physical analysis (DPA) per MIL‑STD‑1580. Certificates of Conformance (CoC) and test data are provided with every shipment.
Customization Options
YM supports tailored JZC‑1M variants for specific military, aerospace, and industrial programs. Volume orders can include:
- Coil voltage: 12V, 24V, 28V, 48V DC – customized to match platform power buses.
- Contact material: Gold overlay (standard for low‑level), silver‑cadmium oxide (1A power), or rhodium (ultra‑low level).
- Terminal style & finish: Solder hook, straight DIP, or surface‑mount; gold or tin plating.
- Screening level: Commercial (standard), high‑reliability (100% burn‑in, temperature cycling), or space‑level (DPA, radiation testing).
- Marking: Laser engraving of customer part number, date code, or inspection stamp.
Our engineering team provides application support, including thermal derating curves, driver circuit recommendations, and SPICE models. Minimum order quantities for custom variants apply – contact YM with your requirements.
Production Process & Quality Assurance (AS9100D Certified)
YM’s military relay production line follows a zero‑defect, fully traceable process designed to meet the most stringent requirements for aerospace and defense programs.
- Raw material control: 100% verification of magnetic alloys, contact wires, glass preforms, and metal cans – all from approved aerospace suppliers with COC and batch traceability.
- Coil winding & encapsulation: Precision winding with automated tension control; vacuum encapsulation using low‑outgassing epoxy.
- Contact assembly in Class 100 cleanroom: Alignment of DPDT contacts under 40x microscope; dynamic force testing to ensure ≤50mΩ initial resistance.
- Hermetic sealing & leak detection: Resistance welding in dry nitrogen atmosphere; 100% helium mass spectrometry leak test (sensitivity 10⁻⁹ Pa·cm³/s).
- Environmental screening (100% for high‑rel lots): Thermal shock (-65°C to +125°C, 10 cycles), constant acceleration (10,000g), and burn‑in (168 hours at 125°C with periodic operation).
- Final electrical test: Automated test system (ATS) measures all parameters per MIL‑PRF‑39016.
- Destructive Physical Analysis (DPA): One unit per lot cross‑sectioned per MIL‑STD‑1580.
With decades of experience in Metal Sealing Relay and PCB Signal Relay production, YM has supplied relays to major defense contractors and aerospace primes. The JZC‑1M is built to exceed the reliability of original Russian relays, ensuring long‑term support for legacy and new defense systems.
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