This rugged miniature circular connector is engineered for extreme environments, offering a robust break away mechanism for quick disconnect. Waterproof when mated and unmated, it ensures reliable signal integrity and EMI shielding. Fully compatible with AMC Easy Clean systems.
The quality and structure of the cable, cabling process, and cable length are critical factors that directly influence the performance of your interconnect solution. The interface between the cabled connector and the device’s transmitter and receiver is also essential to ensure that the entire system meets your industry standards and operational requirements.
The AMC High Density A1 plug combines extremely compact size with maximum electrical performance, making it ideal for military and rugged field applications. Designed for quick-disconnect (break-away) functionality, IP68 waterproof sealing, and up to 40 contacts in a single unit, it ensures signal integrity and mechanical resilience even under the most demanding conditions. This miniature solid connector is tested to MIL standards, offering robust protection against vibration, dust, and moisture, while its color-coded mechanical keying guarantees secure and intuitive mating.
What is S Series ?
FFA circular metal push pull connector with stepped insert
Engineered for precision and durability, the S Series is adental connector solution designed for indoor and protected environments (IP50). Featuring stepped insert (half-moon keying), the connector allows intuitive alignment and secure blind mating, ensuring fast and error-free operation even in low-visibility applications.
This half moon connector with stepped insert comes in a wide range of configurations, including miniature models, elbow plugs, watertight and vacuum-tight receptacles. Built with a solid and compact construction, the S Series is ideal for applications that demand high reliability and frequent mating cycles.
All models are available in hermaphroditic connector versions for enhanced versatility in cable-to-cable or panel-to-cable configurations.
Suitable for signal, power, or hybrid applications, the S Series hermaphroditic connector delivers field-proven performance across industrial, medical, and instrumentation markets.
Our Advantages
LINKHIVE S Series half moon connector with stepped insert offers high-reliability indoor connections with a compact and ergonomic design. The stepped insulator provides intuitive alignment and secure mating. With multiple sizes and contact options, circular push pull connectorwith stepped insert suits a wide range of protected electrical applications.
half moon connector with stepped insert available in straight, elbow, and PCB plug/socket forms
IP50-rated for indoor use
Compact, reliable, and easy to install circular metal connector
Self-latching circular dental connector
Single to 106 Contacts
Welding and Printed Circuit Board Contacts (Straight and Angled)
High-Density Installation, Space-Saving
circular push pull connector with stepped insert fitted with male and female contact
360-Degree Shielding
Hermaphroditic connector with 8 sizes
Half Moon Connector Model & Dimension Overview
| Reference | Dimensions (mm) | ||||
| series | Model | A | L | M | SW1 |
| 00S | FFA 00S | 6.4 | 26 | 18 | 4.5 |
| 0S | FFA 0S | 9 | 34.5 | 24.5 | 6.5 |
| 1S | FFA 1S | 12 | 42.5 | 31.5 | 8.5 |
| 2S | FFA 2S | 15 | 52 | 40 | 11 |
| 3S | FFA 3S | 17.8 | 61 | 46 | 14 |
Model Selection Table
00S Sub- Minature Size /0S Minature Size /1S Small Size – Selection
| Mode | TFA.00S.250.CLA.22 | TFA.0S.302.CLA.52 | TFA.0S.303.CLA.52 | TFA.0S.304.CLA.22 | TFA.1S.302.CLA.42 | TFA.1S.303.CLA.52 | TFA.1S.304.CLA.52 | TFA.1S.305.CLA.62 | TFA.1S.306.CLA.72 |
| Inserts |  |  |  |  | | | |  |  |
| key | coaxial insert | half moon connector | half moon connector | half moon connector | half moon connector | half moon connector | half moon connector | half moon connector | half moon connector |
| Contacts | 1 (coaxial) | 2 | 3 | 4 | 2 | 3 | 4 | 5 | 4 |
| Clamp Ø A | Ø 4.2 mm | Ø 5.2 mm | Ø 5.2 mm | Ø 2.2 mm | Ø 4.2 mm | Ø 5.2 mm | Ø 5.2 mm | Ø 6.2 mm | Ø 7.2 mm |
| Description | Miniature self-latching coaxial circular connector with compact structure | Self-latching circular dental connector with 2-contact stepped insert | Self-latching circular dental connector with 3-contact stepped insert | Compact 4-contact circular connector with stepped insert | 2-contact circular push pull connector with stepped insert | 3-contact half moon connector with stepped insert design, IP50 sealed. | Compact 4-contact metal connector with stepped insert | 5-contact half moon connector with stepped insert | Robust 4-contact metal connector |
| Application | signal transmission in compact space applications | signal/power applications, test & measurement, | data and control signal transmission in industrial or lab settings. | board-to-board connection or multi-signal | signal and control lines in automation or testing devices. | smart equipment, robotic systems, and medical probes. | portable devices or measurement equipment | Used in laboratory devices, diagnostic tools, and control panels. | Ideal for signal or low-voltage hybrid lines in medical |
Medium size 2S Series – TFA Circular Push Pull connector With Stepped Insert Selection
| Mode | TFA.2S.302.CLA.27 | TFA.2S.303.CLA.32 | TFA.2S.304.CLA.42 | TFA.2S.305.CLA.52 | TFA.2S.306.CLA.62 | TFA.2S.307.CLA.72 | TFA.2S.308.CLA.82 | TFA.2S.310.CLA.87 |
| Inserts | | | | | |  |  |  |
| Contacts | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 10 |
| Clamp Ø A | Ø 2.7 mm | Ø 3.2 mm | Ø 4.2 mm | Ø 5.2 mm | Ø 6.2 mm | Ø 7.2 mm | Ø 8.2 mm | Ø 8.7 mm |
| Description | 2-contact miniature connector | ompact 3-contact circular push pull connector with stepped insert | Rugged 4-contact circular push pull connector with stepped insert | 5-contact circular half moon connector with stepped insert | 6-contact self-latching circular half moon connectorwith stepped insert | High-density 7-contact circular metal connector with stepped insert. | 8-contact circular half moon connector with stepped insert | 10-contact circular metal connector |
| Application | Used in precision sensors, probes, or diagnostic equipment. | Suitable for signal control and compact module interfaces. | Used in electronic assemblies, small instruments, and multi-signal lines. | Ideal for communication or sensor systems | Designed for instrumentation interfaces | Perfect for hybrid signal/power modules in lab | Common in measuring instruments, | Ideal for data-intensive, multi-channel equipment |
Large Size 3S Series – TFA Circular Push Pull Connector With Stepped Insert Selection
| Mode | TFA.3S.302.CLA.42 | TFA.3S.303.CLA.57 | TFA.3S.304.CLA.72 | TFA.3S.305.CLA.87 | TFA.3S.306.CLA.97 | TFA.3S.307.CLA.11 | TFA.3S.308.CLA.42 | TFA.3S.310.CLA.57 | TFA.3S.312.CLA 12 | TFA.3S.313.CLA 13 | TFA.3S.314.CLA.97 | TFA.3S.316.CLA 11 | TFA.3S.318.CLA.97 |
| Inserts | | | | | | | | |  |  |  |  |  |
| Contacts | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 10 | 12 | 13 | 14 | 16 | 18 |
| Clamp Ø A | Ø 4.2 mm | Ø 5.7 mm | Ø 7.2 mm | Ø 8.7 mm | Ø 9.7 mm | Ø 10.5 mm | Ø 4.2 mm | Ø 5.7 mm | Ø12.2 mm | Ø13.2 mm | Ø 9.7 mm | Ø 10.5 mm | Ø 9.7 |
| Description | 2-contact self-latching metal connector with stepped insert | 3-contact circular push pull connector with stepped insert robust and IP50 sealing | 4-contact stepped insert plug with half-moon keying, engineered | 5-contact hermaphroditic connector with metal shell | 6-contact circular push pull connector with stepped insert precision stepped | High-density 7-contact plug with stepped insert | 8-contact hermaphroditic connector stepped insert and fast self-latching design | 10-contact Self-latching circular metal connector and stepped insert | 12-contact hermaphroditic connector with stepped insert | 13-contact Self-latching circular metal connector and precision layout | 14-contact circular push pull connector with stepped insert with rugged housing and stepped insert | 16-contact hermaphroditic connector connector with solid latch mechanism, | 18- core circular push pull connector with stepped insert with rugged housing, |
| Application | Used in compact control systems, signal lines in medical or instrumentation equipment. | Ideal for signal control lines or portable devices requiring secure push-pull interface. | Used in multi-signal setups in medical diagnostics, test probes, and lab automation. | Suitable for measurement equipment, communication instruments, and control terminals. | Ideal for modular power/signal interfaces in devices with space constraints. | Used in signal or mixed-signal applications, including smart automation modules | Suitable for multi-line signal systems in compact medical or industrial instruments. | Common in test & measurement setups, electronic control units, and panel interfaces. | instrumentation control systems, signal multiplexing hubs, and electronic test boards. | Ideal for use in smart control panels, measurement units, and high-pin-count signal devices. | Suitable for automated test equipment, lab analysis tools, and robotics interfaces. | Common in high-channel-count modules for signal acquisition, communication or diagnostics. | Used in control units, power-distribution boards, and multi-signal routing modules in lab or factory systems. |
Quality Control & Keying Accuracy
To ensure the consistency and reliability of the circular push pull connector with stepped insert design:
Molded inserts are visually and dimensionally inspected
Tolerances are measured with precision gauges
Mating fit is functionally tested for every production batch
Material (PPS/PPSU/PTFE/PEEK) is verified for thermal and mechanical stability
Mechanical & Electrical Performance
Rated current: Up to 7 A (depending on contact size)
Contact resistance: ≤6.5 mΩ
Endurance: ≥5000 mating cycles
Shock resistance: 100g / 6ms
Vibration resistance: 15g (10Hz–2000Hz)
Insulation resistance: ≥5000 MΩ (600V DC)
Test voltage: 1450V (contact-contact), 1000V (contact-shell)
Working temperature: -40°C to +200°C
Humidity: ≤95% @ 60°C
Salt spray corrosion: 96 hours
S Series Circular Push Pull Connrctor With Stepped Insert Overview
| Straight plug | fixed socket | Elbow socket | Free socket |
FFA plug straight plug,cable collet | ERA socket nut fixing | EPL socket Elbow socket for PCB | PCA Free socket,cable collet |
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FFA plug straight plug, cable collet with bend relief | ERD socket nut fixing | EXP Elbow socket for PCB with 2 nut | PCA Free socket,cable collet with bend relief |
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FFA plug straight plug with oversize cable collet | ERN socket nut fixing |  | |
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FLA Elbow plug elbow 90 °plug.cable collet | EEP socket nut fixing,cable collet | ||
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Linkhive Self-latching circular metal connector IP50 selection
Use the comparison table below to explore the three main self-latching push pull connector series in the IP50 indoor range and find the model best suited to your specific application needs.
B Series Indoor keyed -circular metal connector |
S Series Indoor keyed- circular metal connector with stepped connectors click for more info |
2C Series Indoor keyed- unltra short connector with stepped connectors click for more info | |
| Description | LINKHIVE Push Pull Connector for protected indoor environments | Indoor keyed -circular metal short plug with steped connector | LINKHIVE unltra short Push Pull connector for indoor environments |
| locking Mechanism |
1.Easy-to-operate self-locking system, just push the plug axially into the socket to lock |
2.Once firmly locked, pulling the cable or any other part will not disconnect unless the outer release sleeve is pulled. |
3.When necessary, the connector is disengaged by a single pull on the release sleeve, which first releases the locking latches and then whithdraws the plug . |
| Locking methods | self-latching Push pull connector | self-latching Push pull connector | self-latching Push pull connector |
| plug diameter | 8 sizes from ø 6.5 to ø 35.0 mm (plugs) | 8 sizes from ø 6.4 to ø 17.8.0 mm (plugs), | 7 sizes from ø 14.0 (plugs), to 31mm short length |
| Alignment Key | key G/A/B/C/D/E/F/J/K/L/M/Y/R | 1 (circular connector with half moon connector ) | 1 (circular connector with half moon connector ) |
| length | 8 sizes from 27mm to 103 | 8 sizes from 26 mm to 61mm | 7 sizes from 31mm short length |
| Insulator | PPS/PEEK/PTEE/PA66 | PPS/PEEK/PTEE/PA66 | PPS/PEEK/PTEE/PA66 |
| Shell Material | Chrome-plated Brass | Chrome-plated Brass | Chrome-plated Brass |
| Salt Spray Corrosion | 96hr | 96hr | 96hr |
| Cable ø | 1.4 to 25 mm | 1 to 30 mm | 1.7 to 7.9 mm |
| No.of PINS | 2 to 48 | 2 to 18 | 1 to 14 |
| Contact types | Multipole Contact /Coax Contact / Fibre Optic Contact/ Fluidic Contact/ High Voltage Contact/ hybrid Contact/ Thermocouple Contact | Mono Contact/ Multipole Contact / Coax /tri-coxial /Fluidic Contact / hybrid Contact | Multipole Contact/coxial Contact |
| Sealing | Silicone/Epoxy | Silicone/Epoxy | Silicone/Epoxy |
| Data Protocols | USB 2.0 / USB 3.1 / Eth Cat6 | ||
| Sealing Level | IP50 | IP50 | IP50 |
| Temperature Range | -55°C to 250°C | -55°C to 250°C | -55°C to 250°C |
| Mating Cycles | > 5000 | > 5000 | > 5000 |
Push-pull connectors, military connectors, hybrid connectors, bayonet connectors, custom connectors, cable assembly, and etc.
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