РусскийIn the demanding landscape of aerospace, defense, and heavy industrial automation, connectivity solutions must adhere to rigorous standards of durability and electrical integrity. The 2PM series connector (widely known by its Cyrillic designation 2РМ) represents a cornerstone of Russian-standard (GOST) engineering. Originally developed for Soviet-era military and aviation requirements, these circular connectors are prized for their rugged metal construction, threaded coupling mechanisms, and reliable performance in extreme environments.
For engineers and procurement specialists managing legacy systems or designing new equipment for specific international markets, sourcing high-quality, fully compatible 2PM Russian connectors is critical. Renhotec provides a comprehensive range of 2PM series products designed to meet or exceed original GOST specifications, ensuring seamless integration and long-term reliability.
What is the 2PM (2РМ) Series Russian Connector?
The 2РМ series is a family of low-frequency, small-sized circular connectors. Unlike many Western counterparts that follow the MIL-DTL-5015 or MIL-DTL-38999 standards, the 2PM series is built according to the Russian GOST standards (such as GE0.364.126 TU). These standards dictate specific metric dimensions, shell materials, and contact arrangements that are distinct from imperial-based Western designs.
Heritage of GOST Standards and Metric Design
The defining characteristic of the 2РМ connector is its adherence to the metric system. Every aspect, from the shell diameter to the thread pitch of the coupling nut, is measured in millimeters. This prevents direct intermating with standard US military connectors, making it essential to source exact 2PM-specified parts for repairs or system expansions.
The shell is typically manufactured from high-strength aluminum alloy with a protective finish (such as nickel or cadmium plating), providing excellent corrosion resistance and electromagnetic shielding. The internal insulators are made from heat-resistant plastics or glass (in sealed versions), allowing for stable operation across a wide temperature gradient.
Why Design Matters: Threaded Coupling
The 2PM series utilizes a threaded coupling mechanism. This choice is deliberate; while bayonet-style connectors offer faster mating, threaded connectors provide superior resistance to vibration and mechanical shock. In heavy machinery or aerospace applications where high-frequency vibration is constant, the threaded nut ensures that the electrical contact remains uninterrupted and the seal remains intact.
Product Classification: Understanding Plugs and Sockets Variations
Identifying the correct 2PM configuration requires an understanding of the nomenclature used in Russian technical documentation. The series is divided into several sub-types based on mounting style and sealing capabilities.
Plug Types: Straight (Q) vs. Angled (W)
The “Plug” (often designated by the letter Q or W in technical drawings) is the mobile part of the connection, usually attached to a cable.
- Straight Plugs (Q/К): Standard configuration for direct cable-to-panel connections.
- Angled Plugs (W/У): 90-degree configuration used in space-constrained environments where cable strain relief is a priority.
Socket Mounting: Flange (Z), Sealed (M), and Feed-through (C)
The “Socket” is the fixed part of the connection, typically mounted on a panel or bulkhead.
- Non-Sealed Flange Socket (Z/З): The most common variety for standard industrial environments. It features a four-hole flange for secure mounting.
- Sealed Flange Socket (M/М): These utilize glass-to-metal seal technology. The contacts are fused into a glass insulator, which is then soldered or bonded to the metal shell. This creates a hermetic barrier against moisture, air, and gas.
- Sealed Feed-through (C/С): Specifically designed for “through-wall” applications where a signal must pass through a pressure or vacuum barrier without compromising the seal.
Backshell Options: Shielded (A) vs. Non-Shielded (B)
The backshell (tail attachment) serves as the cable entry point and provides strain relief and shielding.
- Shielded (A/А): Provides a termination point for the cable’s braided shield to ensure EMI/RFI protection.
- Non-Shielded (B/Б): A simplified version used when electromagnetic interference is not a primary concern.
| Component Code | Description | Application Environment |
|---|---|---|
| Z (З) | Flange Socket | General Industrial |
| M (М) | Sealed Flange Socket | High Humidity / Vacuum |
| C (С) | Feed-through Socket | Bulkhead / Pressure Barrier |
| Q (К) | Straight Plug | Standard Cable Assembly |
| W (У) | Angled Plug | Tight Spaces / Cable Routing |
Technical Specifications & Environmental Performance
The 2PM Series Connector is engineered for high-reliability signal and power transmission. Its technical parameters reflect its origin in harsh-environment military applications.
Key Performance Parameters:
- Contact Count: Available in configurations ranging from 4 to 32 pins.
- Current Rating: Varies by contact diameter, typically ranging from 3A to 35A per contact.
- Operating Voltage: Rated up to 560V (AC/DC) depending on the shell size and pin density.
- Contact Resistance: 5 mΩ for silver-plated contacts; even lower for gold-plated options.
- Operating Temperature: Standard range from -60°C to +200°C.
- Mechanical Life: Guaranteed for at least 500 mating cycles without degradation of electrical performance.
The Importance of Contact Plating
In the 2PM series, contacts are usually made of copper alloy with either silver (Ag) or gold (Au) plating.
- Silver Plating: Offers the lowest electrical resistance and is cost-effective for high-power applications. However, it can tarnish over time in sulfur-rich environments.
- Gold Plating: Essential for low-voltage signal transmission where oxidation resistance is critical. Gold ensures long-term contact stability, especially in marine or high-humidity settings.
Interchangeability & Cross-Reference: Replacing Legacy 2РМ/2РМТ
A common challenge for maintenance engineers is finding replacements for older Soviet-made components. Many legacy systems use variants such as the 2РМТ (Tropic-proofed) or 2РМД (Increased contact density).
Full Compatibility with Renhotec 2PM
Renhotec’s 2PM series is engineered to meet or exceed the performance specifications of the 2РМ series. This means you can mate a Renhotec plug with an existing Russian-made socket on a piece of machinery without modification.
We offer cross-references for the following series:
- 2РМ (Standard): General-purpose low-frequency connectors.
- 2РМТ (T): Heat-resistant/Tropic-proof versions capable of withstanding higher ambient temperatures.
- 2РМД / 2РМДТ: These feature a “double” or higher density of contacts within the same shell size compared to the standard 2PM.
- 2РМГ / 2РМГД: Sealed versions with glass-to-metal seals.
Cross-Reference Table (Representative Samples)
| Russian P/N | English P/N | RENHOTEC P/N | Type |
|---|---|---|---|
| 2РМГ14Б4Ш1Е2 | 2RMG14B4Sh1E2 | 2PM14J4M3 | Sealed Socket, 4-Pin, Male |
| 2РМГ18Б7Ш1Е2 | 2RMG18B7Sh1E2 | 2PM18J7M3 | Sealed Socket, 7-Pin, Male |
| 2РМГ22Б10Ш1Е2 | 2RMG22B10Sh1E2 | 2PM22J10M3 | Sealed Socket, 10-Pin, Male |
| 2РМГ24Б19Ш1Е2 | 2RMG24B19Sh1E2 | 2PM24J19M3 | Sealed Socket, 19-Pin, Male |
| 2РМГД27Б7Ш5Е2 | 2RMGD27B7Sh5E2 | 2PM27J7M3 | Sealed High-Density Socket, 7-Pin |
| 2РМГД30Б24Ш5Е2 | 2RMGD30B24Sh5E2 | 2PM30J24M3 | Sealed High-Density Socket, 24-Pin |
| 2РМГ30Б32Ш1Е2 | 2RMG30B32Sh1E2 | 2PM30J32M3 | Sealed Socket, 32-Pin, Male |
Explore 2PM Product Range
Browse our full inventory of 2PM(T), 2PMD(T), and 2PMГ series. Designed for high-reliability signal & power transmission.
- Compatible with GOST Original Parts
- Z/M/C Socket Configurations Available
- Multiple Pin Layouts (4 – 32 Pins)
2PM Series Datasheets
Download detailed technical drawings, performance curves, and cross-reference tables for your engineering review.
- Threaded Coupling Mechanical Specs
- Shielded (A) vs Non-Shielded (B) Data
- Application-Specific Guidelines
Industrial Applications: Where Reliability is Non-Negotiable
Because the 2РМ connector was designed for mission-critical systems, it remains the preferred choice in several heavy industries today.
1. Railway and Rolling Stock
In locomotives and tramways, connectors are subjected to constant low-frequency vibrations and varying weather conditions. 2PM connectors are used in braking systems, lighting control, and driver cabin electronics due to their secure threaded coupling.
2. Oil and Gas Infrastructure
Upstream and midstream equipment often operates in explosive or corrosive atmospheres. The sealed versions (2PM-M) are ideal for sensors and control valves where gas-tight integrity is mandatory.
3. Aerospace and Avionics
Legacy aircraft and ground support equipment (GSE) utilize 2PM series for their high power-to-weight ratio and ability to function at high altitudes where air pressure drops significantly.
4. Heavy Machinery and Mining
In excavators and underground mining equipment, the metal shell of the 2PM Russian connector provides the necessary physical protection against impact and debris.
Selection Guide: How to Choose the Right 2PM Configuration
Selecting the correct 2PM series connector involves a four-step technical verification process:
- Define the Shell Size and Pin Count: Identify the diameter of the mounting hole and the number of electrical circuits required. Shell sizes usually range from 14mm to 42mm.
- Select Mounting Style: Do you need a straight plug for a cable or a flange socket for a panel? If the panel must be gas-tight, choose the M (Sealed) series.
- Determine Gender (Plug vs. Socket): In 2PM systems, the “Plug” can carry either pins (male) or sockets (female). Traditionally, the power-source side uses the female contacts for safety.
- Confirm Plating and Environment: Choose silver for high current or gold for sensitive signals. Ensure the backshell (Shielded vs. Non-shielded) matches your cable type.
Frequently Asked Questions
Are Renhotec 2PM connectors directly compatible with original Russian GOST parts?
Yes. Our connectors are precisely engineered to meet the GOST GE0.364.126 TU specifications. They utilize identical metric dimensions and threaded coupling mechanisms, ensuring 100% intermateability with original Soviet/Russian-made components.
What is the difference between 2PM and 2PMT series?
The “T” in 2PMT stands for “Tropic” (Tropic-proofed). While both series share the same physical dimensions, 2PMT versions are enhanced for extreme environments, offering superior resistance to heat and humidity, making them ideal for high-temperature industrial or tropical applications.
Can I get a customized backshell for my 2PM plug?
Yes. We offer both Shielded (Type A) and Non-Shielded (Type B) backshell configurations. Depending on your EMI/RFI protection requirements or cable routing needs (straight vs. angled), we can customize the assembly to fit your specific BOM requirements.
How do I identify an unknown 2PM connector?
Start by measuring the outer shell thread diameter in millimeters (common sizes include 14, 18, 22, 24, etc.). Then, count the number of contacts and identify the mounting style: Z (Flange Socket), Q (Straight Plug), or W (Angled Plug). Our technical team can also assist with identification if you provide a clear photo.
Whether you are maintaining legacy systems or developing new industrial solutions, Renhotec provides the engineering expertise and manufacturing precision required for 2PM Series Connectors.
- Fast Lead Times: Avoid the delays of sourcing from traditional Eastern European distributors.
- Technical Support: Direct access to engineers who understand GOST and MIL-spec differences.
- Quality Guaranteed: Every component undergoes rigorous continuity and insulation resistance testing.