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SP28 Connector
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5 Pin SD28 / SP28 Waterproof Connector with Wire

>Number Of CoresNumber Of Cores 2-26 Pin
Contact DiameterContact Diameter(mm) 1.0mm/2.8mm/3.6mm
IP RatingIP Rating IP68
Shell MaterialShell Material Thermoplastic PA66/PA6
Temperature RangeTemperature Range -25℃ ~ +85℃
TerminationTermination Welding
Rated CurrentRated Current(A) 5A/10A/25A
Rated VoltageRated Voltage(Ac.V) 250V/380V
Test VoltageTest Voltage(Ac.V)1Min 1500V
Insulation ResistanceInsulation Resistance (MΩ) 2000MΩ
Contact ResistanceContact Resistance (MΩ) ≤5MΩ
CertificationCertification CE, RoHS,BASCI,ISO9001
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SD28 Waterproof Connector with Wire
The SD28 Waterproof Connector with Wire is a heavy-duty circular connector series designed for reliable power and signal transmission in industrial and outdoor environments. Built with a reinforced structure and dependable sealing system, the SD28 series ensures stable performance in applications exposed to vibration, dust, moisture, and long-term mechanical stress.
SP20 Connector
Rather than a single model, SD28 is a complete connector platform, offering 2 to 26 pin configurations to support everything from simple power connections to complex multi-circuit systems. Delivered as a pre-wired cable assembly, it helps equipment manufacturers standardize installation and improve operational reliability.

One Connector Series, Multiple Electrical Solutions
The biggest advantage of the SD28 series is its flexibility. Engineers can select the appropriate pin configuration without changing the connector family, simplifying equipment design, maintenance, and spare part management.
Available configurations:
2 - 26 Pin options for power, signal, or hybrid circuits
Support for low to medium and higher current applications
Compatible with industrial control and power distribution systems

Suitable for both indoor and outdoor installations

Connector

Core product advantages:
Waterproof and dust-resistant design for harsh environments
Strong mechanical housing for heavy-duty applications
Secure locking structure to prevent accidental disconnection
Stable electrical contact for continuous operation

Long service life under industrial conditions


Engineered Cable Assembly for Real Equipment Use
We focus on delivering ready-to-install connection solutions, not just connector components. Every SD28 cable assembly is produced according to practical installation and electrical requirements.
Customization capabilities include:
Custom cable length based on equipment layout
Selection of wire cross-section according to current load
Industrial-grade cable materials (PVC / rubber / PUR)
Shielded cable options for signal stability
Straight or right-angle cable outlet structures
Multi-branch cable harness solutions
OEM and private-label production
Waterproof Connector
This approach reduces installation risk and improves production efficiency for equipment manufacturers.

Typical Applications for SD28 Connector
The SD28 waterproof connector with wire is widely used in systems where reliability and environmental protection are essential:
Industrial machinery and automation equipment
Outdoor power and control systems
LED lighting and display installations
Construction and mining machinery
Renewable energy and energy storage equipment

Marine and transportation electrical systems


Manufacturing Strength - Built for Long-Term Supply, Not One-Time Orders
Industrial customers often worry about consistency, delivery stability, and supplier reliability more than the connector itself. Our factory is structured to address exactly these concerns.
We operate a fully integrated manufacturing system covering connector production, cable processing, assembly, and quality inspection. This allows us to maintain strict control over performance and ensure repeatable results across large production batches.
Why customers trust our factory:
15+ years specialized in circular connectors and cable assemblies
Stable production capacity supporting continuous orders
Standardized manufacturing processes for batch consistency
Dedicated quality control team for every production stage
Strong experience supporting OEM equipment manufacturers
Reliable delivery planning for long-term projects
Export experience serving customers in multiple industrial markets
Connector
In short, we are not just supplying connectors - we are supporting stable equipment production.

Quality Control Focused on Field Reliability
Every SD28 connector assembly is tested with real application conditions in mind, ensuring dependable performance after installation.
Quality assurance includes:
Waterproof sealing performance testing
Electrical continuity and load testing
Mechanical durability and vibration resistance testing
Cable pull and strain resistance testing

Final functional inspection before shipment

Waterproof Connector


Certifications That Support Global Projects
Our production system complies with internationally recognized standards, helping customers meet regulatory and quality requirements in global markets:
ISO9001 Quality Management System
CE Certification
RoHS Environmental Compliance

IP-rated waterproof performance verification

IP68 Connector


A Connector Series Designed for Scalable Industrial Systems

The SD28 Waterproof Connector with Wire (2 - 26 Pin) provides a flexible, durable, and reliable connection solution for modern industrial equipment. Backed by strong manufacturing capability and stable production control, it supports customers who require consistent quality and dependable long-term supply.

Item

Parameters

Number of Cores

2-26Pin

Gender

Male/Female

Housing Material

Thermoplastic PA66/PA6

Cores Material

Brass Plated with Silver

Insulator Material

PPS

Locking System

Threaded Connection

Temperature Range

-20℃, +85℃

Rated Current (A)

5A/10A/25A

Rated Voltage (AC.V)

250V/380V

Test Voltage (AV.C)1Min

1500V

Insulation Resistance (㏁)

2000㏁

Contact Resistance (㏁)

≤5㏁

Termination

Welding


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Customer Reviews

   

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   Solid and reliable


FlashFindsShopper  2026-02-02

Used SD16s on our control panels. The threaded lock is tight, and they’ve held up to dust and vibration. No issues in 3 months—highly recommend.
   Sturdy for my workshop gear


ShoeLover247  2026-02-02

Used SD16 on my small air compressor’s control line. Thread lock holds super well, no loose connections from vibration. IP68 lives up to the hype!
   High quality connectors


HomeGoodsGuru  2026-02-02

Just installed these for my garden LED spotlights—so easy to wire up, and the waterproof seal is tight. Rained heavy 2 days later, zero issues. Worth every penny!
   SD16 = Game Changer


AdventureShopper  2026-02-02

Ran power + 8 signal lines for my outdoor sensor setup with the 10-core SD16. Clean, tidy, and 100% waterproof. No more messy wiring!
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