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LD28/SP28 Waterproof Square Flange Connector 5Pins

>Number Of CoresNumber Of Cores 2 - 9Pins
Contact DiameterContact Diameter(mm) 1.2mm - 3.2mm
IP RatingIP Rating IP68
Shell MaterialShell Material Thermoplastic PA6(Flame Retardant)
Temperature RangeTemperature Range -25°C to +85°C
TerminationTermination Screw Crimping
Rated CurrentRated Current(A) 5A - 45A
Rated VoltageRated Voltage(Ac.V) 280V
Test VoltageTest Voltage(Ac.V)1Min 1500V
Insulation ResistanceInsulation Resistance (MΩ) 2000MΩ
Contact ResistanceContact Resistance (MΩ) ≤ 1 mΩ
CertificationCertification CE, RoHS,BASCI,ISO9001
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LD28 / SP28 Waterproof Square Flange Connector - 5 Pins High-Stability Panel Interface
The LD28 / SP28 5 Pins Waterproof Square Flange Connector is designed for applications that require a secure panel-mounted connection with stable power and signal transmission. With its square flange structure and 5-pin configuration, it provides a reliable interface for equipment that demands both mechanical stability and consistent electrical performance in harsh environments.
LD28 Connector
Unlike docking or cable-mount solutions, this flange-type connector is optimized for fixed installation on equipment panels, ensuring long-term connection integrity and reduced risk of loosening under vibration or continuous operation.

Built for Stable Panel Integration
This connector is specifically developed for systems that prioritize permanent installation and structural reliability. The square flange design provides strong mounting support and precise alignment, making it ideal for industrial equipment requiring robust and organized wiring architecture.

Key Advantages of LD28/SP28 Square Connector
Square Flange for Strong Panel Mounting
The four-point fixed structure ensures firm installation, improving resistance to vibration and mechanical stress.

5 Pins for Balanced Power and Signal Use
Designed for moderate complexity systems, supporting both power supply and signal transmission in a single interface.

Reliable Waterproof Protection (IP-Level Design)
Sealing structure helps protect internal contacts from water, dust, and environmental contamination, ensuring stable long-term operation.

Stable Electrical Contact Performance
Precision-engineered contacts ensure low resistance and consistent conductivity for continuous use scenarios.

Reduced Maintenance Risk
Fixed installation design minimizes accidental disconnection and improves system reliability over time.

Manufacturing Capability You Can Rely On
15+ Years of Connector Expertise
We specialize in industrial circular connectors and cable assemblies, serving global customers across automation, energy, and equipment manufacturing industries.
Connector
Fully Controlled Production System
Our in-house manufacturing includes mold design, die-casting, CNC machining, injection molding, assembly, and testing—ensuring stable quality and fast delivery.
SP13 Connector
Strict Quality Testing Process
Each connector is tested for waterproof performance, electrical conductivity, mechanical strength, and dimensional accuracy before shipment.
Connector
OEM / ODM Customization Support
We provide flexible customization options including pin layout, cable design, materials, and packaging solutions based on project requirements.

Typical Applications for LD28/SP28 Connector
Industrial Control Panels
Automation Equipment
Power Distribution Systems
Monitoring and Detection Devices
Machinery and Manufacturing Systems

Outdoor Electrical Installations


Why This Connector Stands Out
If your application requires a stable, permanently mounted waterproof connector with balanced 5-pin functionality, this square flange design offers a reliable and long-lasting solution for industrial environments.

Looking for a stable panel-mounted waterproof connector solution?
Contact us today for samples, technical drawings, or a competitive quotation.

 Item

 Parameters

 Number of Cores

 2 - 9Pin

 Gender

 Male/Female

 Housing Material

 Thermoplastic PA6(Flame Retardant)

 Cores Material

 Brass Plated with Gold

 Insulator Material

 Thermoplastics

 Locking System

 Threaded Connection

 Temperature Range

 -25℃, +85℃

 Rated Current (A)

 5A - 45A

 Rated Voltage (AC.V)

 380V

 Test Voltage (AV.C)1Min

 1500V

 Insulation Resistance (㏁)

 2000㏁

 Contact Resistance (㏁)

 ≤1㏁

 Termination

 Screw Crimping


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LD28/SP28 Waterproof Square Flange Connector
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   Solid Industrial Workhorse


AmazonAddict777  2026-02-02

Our go-to for factory sensors. 4-core, 15A rating works for power + signal. IP68 keeps dust/water out, and the screw terminals are rock-solid. Durable and affordable.
   Heavy-Duty Power Connector


StyleSavvy13  2026-02-02

Used this 3-core model for my EV charger. 50A rating handles high power, and the IP68 seal keeps it safe in all weather. Sturdy build, easy to install. Highly recommend for high-power projects!
   Tiny but Tough! Perfect for Small Outdoor Projects


OnTheGoShopper  2026-02-02

I needed a compact waterproof connector for my garden LED strip lights, and the LD12 is exactly what I was looking for. The 2-core model fits perfectly with my 6mm cable, and the screw terminals made installation super easy—no soldering required!It’s been through rain and even a few accidental spl
   Compact & Reliable IP68 Plug


VintageTreasureHunter  2026-02-02

Great for small security sensors. 2/3-core, fits 4-7mm cables. IP68 holds up in damp areas, screw install takes 1 minute. Sturdy and affordable!
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