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Bayonet Connectors – Secure and Vibration-Resistant Locking Solutions

Bayonet connectors are a standardized locking solution designed for maximum versatility across industries and applications. binder’s extensive portfolio covers subminiature connectors like the Bayonet IP40 Series 710 and NCC Series 670, miniature connectors such as the Bayonet IP40 Series 678 and NCC Series 770, power solutions including Bayonet HEC Power and Bayonet IP40 Power, as well as medical-grade connectors in the NCC Series 770. These connectors are trusted wherever precision, durability, and repeatable performance are essential.

How does a bayonet connector work?

The genius of bayonet connectors lies in their simple pin-and-slot design. The connector’s pins align with matching slots in the socket, and a short twist of the locking ring moves the pins into a secure position. This creates a stable mechanical and electrical connection while ensuring proper alignment and preventing accidental disconnection. The mechanism allows for quick, tool-free assembly and repeated use without wear, making bayonet connectors ideal for fast-paced industrial, medical, and power applications.

Subminiature bayonet connectors

Bayonet IP40 Series 710

The Bayonet IP40 Series 710 offers high-quality subminiature cable and flange connectors designed for reliable performance in compact applications. Available with 2–8 gold-plated contacts, these connectors are rated between 1A and 4A at 125V, ensuring consistent electrical performance. The series features durable plastic housings, a bayonet locking mechanism, and solder connection terminals. Connection cross-sections range from 0.14 mm² to 0.25 mm², with an operational temperature span of -40°C to +85°C, making them suitable for a variety of industrial, automation, and instrumentation applications.

Bayonet NCC Series 670

The NCC Series 670 offers compact cable plugs and flange sockets engineered for reliable subminiature connectivity. The flange sockets provide IP54 protection when unmated and IP67 protection when mated, ensuring dependable performance even in challenging environments. These bayonet connectors feature 5 gold-plated contacts and support a rated current of 2A at 50V. Built with a durable plastic housing and a secure bayonet locking system, the series is available with solder or dip-solder termination. The connectors support a 0.25 mm² connection cross-section and operate within a temperature range of -25°C to +85°C, making them ideal for industrial, automation, and instrumentation applications.

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Miniature bayonet connectors

Bayonet IP40 Series 678

The Bayonet IP40 Series 678 offers versatile cable and flange connectors designed for reliable performance in compact applications. These connectors are available with 2 to 24 contacts and support rated currents ranging from 1A to 7A, depending on the contact configuration. The series includes straight and angled cable plugs, flange plugs, and receptacles, all equipped with solder terminations for secure wiring. Engineered for durability, the 678 series delivers over 500 mating cycles, making it an excellent choice for industrial, automation, and instrumentation environments where long-term reliability is essential.

Bayonet NCC Series 770

The NCC Series 770 offers high-performance circular connectors in both cable and flange versions, featuring a secure bayonet locking system and IP67 protection when mated. The flange variant provides IP67 protection even when unmated, ensuring maximum safety in demanding environments. These connectors are equipped with 8 gold-plated contacts, each rated at 2A, and are compatible with cable glands for diameters of 2.5–4 mm, 4–6 mm, and 6–8 mm. Engineered for exceptional durability, the 770 series delivers over 5,000 mating cycles, making it ideal for industrial, medical, and instrumentation applications requiring long-term reliability and robust environmental protection.

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Power Bayonet Connectors

Bayonet HEC Power Series 696

The HEC Series 696 (Harsh Environment Connectors) is engineered for demanding outdoor and industrial applications, offering exceptional protection and durability. Available as square flange and cable-mounted versions, these connectors feature an integrated protective conduit that safeguards cables up to IP67, and when mated, up to IP69K, making them ideal for high-pressure washdown and extreme environmental exposure. The series is UV-resistant and carries both VDE and UL approvals for global compliance. Built for long service life, the 12-pole version delivers over 500 mating cycles, while the 5- and 8-pole versions achieve more than 1,000 mating cycles, ensuring reliable performance in harsh, vibration-prone, and outdoor environments.

Bayonet Power IP 40 Power

The Bayonet IP40 Series 690 offers robust circular connectors designed for reliable performance in industrial and automation applications. These connectors provide 3 to 12 contacts and support rated currents of 5A or 10A, depending on the contact configuration. Both cable and flange versions feature solder terminations and operate within a wide temperature range of –40°C to +85°C. The flanged plug/flange socket of the 690 series measures 31 mm x 44 mm, and a shieldable version is available for applications requiring enhanced EMI protection. Engineered for durability, the series achieves over 500 mating cycles, making it a dependable choice for demanding environments.

PBC15

The PBC15 Series 615power connectors are designed for fast, efficient installation thanks to their quick-locking mechanism, making them ideal for high-demand industrial environments. Equipped with three power contacts, they support currents up to 16A at 630V, while the integrated signal contacts handle up to 10A at 63V, enabling a compact and efficient single-cable solution. The 6-pin version offers broad versatility across a wide range of industrial applications. With their robust construction and high protection rating, PBC15 connectors deliver excellent durability and long-term reliability. Integrated electromagnetic shielding ensures interference-free signal transmission, providing secure, stable performance for high-power and noise-sensitive applications.

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Bayonet Connectors for Medical Applications

The medical version of the NCC Series 770 features a grey-white housing similar to RAL 9002, with additional colors available upon request. These DEHP-free circular connectors are engineered for maximum safety and reliability in medical environments. Both the cable and flange versions use a secure bayonet locking system and provide IP67 protection when mated, while the flange version maintains IP67 protection even when unmated. The connectors include 8 gold-plated contacts, each rated at 2A, ensuring consistent and high-quality signal and power transmission. Compatible cable glands support diameters of 2.5–4 mm, 4–6 mm, and 6–8 mm. Designed for long service life, the medical 770 series delivers over 5,000 mating cycles, making it a robust and dependable solution for demanding medical applications.

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All bayonet series

Benefits of bayonet connectors

  • Resistant towards vibrations and shock
    Bayonet locking systems are highly resistant to vibration which prevents connectors from disconnecting and intermittent signal interference.
  • Secured and reliable lock
    Operator recognizes when connector is safely locked due to latching mechanism.
  • Safety
    The design significantly reduces accidental disconnection which can reduce maintenance cost and application failure.
  • Easy to mate and disconnect
    The locking systems is ideal for applications that require fast and easy connectivity without losing time on screwing.
  • High durability
    In order to withstand rough environments in industrial applications, bayonet connectors are designed to be used in harsh conditions where other connectors could fail.

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Which industries do bayonet connectors benefit?

  • Energy and Renewables
  • Heavy Machinery
  • Medical and healthcare
  • Security and Defense
  • Test and Measurement
  • Transportation

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Applications of bayonet connectors

Since bayonet locking technology is part of many product series, it is being used in several applications across different industries which vary from medical applications to outdoor and heavy machinery.

Most innovative bayonet design from binder: NCC technology at a glance

The NCC Series 670 is an innovative, space-saving bayonet connector that redefines compact connectivity for demanding applications. Designed to deliver high performance where every millimeter counts, the 670 series builds on the proven reliability of the NCC Series 770, offering a smaller yet equally robust solution. Its cutting-edge design achieves IP54 protection when unmated and IP67 when mated, providing exceptional environmental resistance in tight installation spaces.

Housed in a 16 mm plastic enclosure, the 5-pin connectors feature gold-plated contacts rated at 2A and 50V, a secure bayonet locking mechanism, and outstanding vibration and shock resistance. With a cable outlet of 3–5 mm and compatibility with 24 AWG (0.25 mm²) wires, the NCC 670 delivers reliable, high-performance connectivity in subminiature form, making it the ideal choice for industrial automation, medical devices, test equipment, and other applications where innovative design meets uncompromising performance.

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FAQ - Frequently Asked Questions about Bayonet Connectors

A bayonet connector is an electrical connector that uses a pin-and-slot locking system for fast, secure, and repeatable mating. It is widely used in industrial, medical, and power applications where reliability and quick installation are essential.

A bayonet connector locks by inserting the plug, aligning the pins with the slots, and twisting the locking ring until it engages. This creates a stable mechanical and electrical connection without the need for tools.

Bayonet connectors use a twist-to-lock mechanism for higher security and better vibration resistance, while snap-in connectors rely on a push-fit latch that allows faster but less secure mating.

Bayonet connectors can be waterproof depending on the series. Many offer IP67 protection when mated, making them suitable for harsh or outdoor environments.

They are ideal for industrial automation, medical devices, test and measurement equipment, power distribution, and environments requiring fast, secure, and reliable connections.

Yes. Bayonet connectors can be customized with different pin counts, housing materials, cable lengths, sealing levels, and contact configurations to match application-specific requirements.

Key advantages include fast mating, secure locking, high reliability, resistance to vibration, and consistent performance in demanding industrial and medical environments.

Yes. The twist-lock mechanism provides excellent vibration resistance, preventing accidental disconnects in dynamic or high-vibration applications.

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