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FQ18 Series 7 Pin Circular Connector Straight Wire Spring Female Plug FQ18-7TK

Basic Properties

Place of Origin:China
Model Number:FQ18-7TK

Trading Properties

Minimum Order Quantity:100pcs
Delivery Time:35 work days
Payment Terms:L/C,D/A,D/P,T/T
Specifications
Orientation: Straight Nummber Of Positions: 7 Pin
Relative Humidity: Up To 98 ± 3% At 40°C Connector Type: Plug
Fastening Type: Threaded Operating Temperature: -55℃ – +100℃
Insulating Materials: PPS Contact Type: Female
Product Description


FQ Series 7 Pin Waterproof Circular Connector 10A Bayonet Plug IP67

Product Overview

The FQ Series 7 Pin Waterproof Circular Connector is engineered for reliable electrical transmission in demanding industrial environments where moisture, vibration, and dust protection are essential. Designed in accordance with the DZ4Q/RE008-84 standard, this connector is an upgraded version of the traditional Q series, offering improved sealing performance and enhanced mechanical reliability.

Its compact aluminum alloy housing, combined with a secure bayonet locking mechanism, provides quick installation while maintaining a stable electrical connection. The connector adopts an advanced squirrel-cage elastic contact structure that delivers lower contact resistance and greater durability than conventional wire spring contacts, making it suitable for equipment requiring dependable long-term performance.

Key Features

  • High-performance IP67 sealing to protect against water and dust ingress.

  • Bayonet locking mechanism allows fast connection and secure engagement.

  • Squirrel-cage elastic contacts provide stable conductivity and reduced contact resistance.

  • Gold-plated copper contacts improve electrical conductivity and corrosion resistance.

  • Lightweight anodized aluminum alloy shell offers mechanical strength and corrosion protection.

  • Compact design saves installation space while maintaining reliable performance.

  • Excellent resistance to vibration, mechanical shock, and harsh environmental conditions.

  • Suitable for repeated connection and disconnection with a service life of up to 500 mating cycles.

Working Principle

The connector establishes electrical continuity by accurately engaging gold-plated male and female contacts through a precision bayonet locking system. Once locked, the sealing structure prevents moisture and dust from entering the contact chamber, while the elastic contact design maintains consistent electrical pressure under vibration and mechanical movement.

Technical Specifications

Item Specification
Connector Type Plug
Series FQ Waterproof Circular Connector
Shell Size 18
Number of Positions 7 Pin
Contact Size 7 × 1.5 mm
Connection Method Bayonet Connection
Termination Solder
Rated Current 10 A
Rated Voltage 400 V
Contact Resistance ≤ 2.5 mΩ
Contact Material Gold-Plated Copper
Insulator Material PBT
Shell Material Anodized Aluminum Alloy
Operating Temperature -55°C to +100°C
Relative Humidity Up to 98 ± 3% at 40°C
Atmospheric Pressure 1 kPa
Vibration Resistance 10–200 Hz, 150 m/s²
Protection Rating IP67
Mechanical Life 500 Mating Cycles

Typical Applications

The FQ waterproof circular connector is widely used in industrial equipment requiring secure electrical connections under challenging operating conditions, including:

  • Industrial automation systems

  • Communication equipment

  • Power distribution devices

  • Measurement and testing instruments

  • Outdoor electronic equipment

  • Marine electrical systems

  • Railway control equipment

  • Mechanical manufacturing equipment

Customization Service

OEM and ODM services are available to support different project requirements. Customization options include connector configurations, cable assembly, wire length, contact arrangements, packaging, and product labeling to meet various industrial applications.

FAQ

Q1: Is this connector suitable for outdoor installation?
Yes. The IP67 protection rating helps prevent dust ingress and temporary water immersion under specified conditions.

Q2: What makes the squirrel-cage contact structure different?
Compared with conventional spring contacts, it provides more stable contact pressure, lower electrical resistance, and improved resistance to vibration and impact.

Q3: Can the connector be supplied with cable assemblies?
Yes. Customized cable assemblies, wire lengths, and termination solutions are available according to project requirements.

Q4: Which industries commonly use this connector?
It is commonly applied in industrial automation, communication equipment, transportation systems, instrumentation, marine applications, and outdoor electrical installations.


Ratings & Review

Overall Rating

5.0
Based on 50 reviews recently

Rating Snapshot

The following is the distribution of all ratings
5 stars
100%
4 stars
0%
3 stars
0%
2 stars
0%
1 stars
0%

All Reviews

Е
*
Russian Federation Mar 12.2026
Качество продукции хорошее, красиво упаковано, быстро отправляется, хорошо
д
*
Russian Federation Jun 17.2025
Приехал быстро и хорошо работал. Установка была простой.
F
F*e
Ukraine May 8.2025
I was a bit worried at first, but these connectors are solid. Installation was straightforward and they work perfectly.
Contact Details
Hefei ZLTIE Electronics Co., Ltd

Contact Person: Mr. Gavin

Tel: +86-0551-63637393

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