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Industrial Waterproof SP21 4 Pin Flange Connector

>Number Of CoresNumber Of Cores 2 - 12Pins
Contact DiameterContact Diameter(mm) 1.0mm/2.0mm/2.8mm
IP RatingIP Rating IP68
Shell MaterialShell Material PC/PA66
Temperature RangeTemperature Range -40℃ ~ +85℃
TerminationTermination Welding
Rated CurrentRated Current(A) 5A/15A/30A
Rated VoltageRated Voltage(Ac.V) 400V-500V
Test VoltageTest Voltage(Ac.V)1Min 1000V-1500V
Insulation ResistanceInsulation Resistance (MΩ) 2000MΩ
Contact ResistanceContact Resistance (MΩ) ≥5MΩ
CertificationCertification CE, RoHS,BASCI,ISO9001
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Industrial Waterproof SP21 4 Pin Flange Connector
The Industrial Waterproof SP21 4 Pin Flange Connector is a rugged circular connector designed for secure panel-mounted power or signal connections in demanding industrial environments. With a reinforced flange mounting structure and reliable sealing design, it provides stable electrical performance while protecting against water, dust, and mechanical stress.

Engineered for fixed installation applications, the SP21 flange connector ensures firm positioning on equipment panels, reducing movement and maintaining consistent connectivity during long-term operation. Its 4-pin configuration is commonly used for balanced power distribution or multi-signal transmission systems.

SP21 Flange Connector

Designed for Secure Panel Installation
The flange mounting structure allows the connector to be firmly fixed to enclosures or control panels, improving connection stability and simplifying equipment integration. This makes it particularly suitable for systems requiring reliable external interfaces.
Key functional advantages include:
4-pin configuration for power or signal transmission
Flange panel mount design for stable installation
IP68 waterproof and dustproof protection
Strong mechanical structure for industrial durability
Secure locking system to prevent loosening

Reliable performance in outdoor and harsh environments

SP21 Waterproof Connector


Installation & Configuration Flexibility
The SP21 flange connector is designed to support various equipment installation requirements:
Panel mount flange connection structure
Solder or crimp termination options
Compatible with different cable sizes
Optional protective caps and sealing accessories
Available in multiple pin configurations across the SP21 series
OEM customization for mechanical and electrical specifications
This flexibility allows easy integration into both new equipment and retrofit projects.

Typical Applications for SP21 Flange Connector
The Industrial Waterproof SP21 4 Pin Flange Connector is widely used in:
Industrial machinery and automation systems
Outdoor electrical control cabinets
Power distribution equipment
LED lighting and display systems
Marine and transportation equipment

Renewable energy and environmental systems


Structural Reliability & Production Capability
For flange-type connectors, installation stability and sealing performance are critical. Our manufacturing process focuses on maintaining dimensional accuracy in the flange interface and ensuring consistent sealing pressure between the connector and equipment panel.
We emphasize:
Precision mold and machining control for flange alignment
Stable gasket compression for reliable waterproof sealing
Consistent assembly standards across production batches
Mechanical durability verification for long-term installation
This ensures that every SP21 flange connector delivers dependable performance in real industrial installation conditions.

Waterproof Connector


Reliable Connection Interface for Industrial Equipment

The SP21 4 Pin flange connector provides a durable and secure panel interface for industrial systems requiring waterproof protection and stable electrical connection. With robust construction and dependable installation performance, it supports long-term operation in challenging environments.

 Item

 Parameters

 Number of Cores

 2-9Pin

 Gender

 Male/Female

 Housing Material

 PC/PA66

 Cores Material

 Brass Plated with Gold

 Insulator Material

 PPS

 Locking System

 Screw Locking

 Temperature Range

 -40℃, +85℃

 Rated Current (A)

 3A/5A/13A

 Rated Voltage (AC.V)

 400V - 500V

 Test Voltage (AV.C)1Min

 1000V - 1500V

 Insulation Resistance (㏁)

 2000㏁

 Contact Resistance (㏁)

 ≥5㏁

 Termination

 Welding


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SP21 Flange Connector
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SP21 Flange Connector
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   Fixes loose wire issue, tiny but super durable!


EcoFriendlyFreak  2026-02-02

Solved my outdoor LED loose wire problem perfectly. Small size fits tight spaces, waterproof seal works great in rain. Solid build, no signal loss at all—great quality!
   No more water damage for my CCTV cameras!


GourmetGoddess  2026-02-02

My old camera connectors kept failing from rain, SP13 is a game-changer. IP68 waterproof holds up, locking design never comes loose. Sturdy build, totally reliable for outdoor use.
   Heavy-duty, just what my pump needed


SustainableStyleX  2026-02-02

My submersible pump needed a durable connector, and the SP17 delivered. It’s waterproof, easy to install, and carries the current without any issues. No more tripping over exposed wires—highly recommend for industrial use.
   Reliable power for my security cameras


SweetDealsAndSteals  2026-02-02

Used SP13 connectors to wire my new CCTV system. The IP68 rating means I don’t worry about rain or dust, and the locking mechanism keeps them from coming loose. Solid build, works flawlessly so far.
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