LD20/SP20 Industrial Flange Connector
SP21 IP68 Connector for Smart Electrical Control Boxes
The SP21 IP68 connector is a rugged waterproof circular connector designed for reliable electrical connections in smart electrical control boxes and automation control systems. With its strong sealing performance and durable construction, it ensures stable operation even in demanding industrial environments.
Reliable Waterproof SP21 Connector for Control Equipment
Featuring an IP68 waterproof rating, the SP21 connector effectively protects internal contacts from dust, moisture, and harsh environmental conditions. This makes it highly suitable for long-term use in intelligent control equipment and outdoor electrical installations.
Durable Circular Connector for Industrial Control Systems
The SP21 circular connector is engineered with a robust structure that provides excellent mechanical strength and vibration resistance. It is widely used in smart control cabinets, automation equipment, industrial electronics, and electrical control boxes where stable and secure connections are essential.

Key Selection Considerations for the SP21 Connector
When evaluating the SP21 connector for your control system, focus on these decision points:
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Pin Configuration: Available in 2 to 12 pin options, allowing you to match the connector to your specific circuit requirements.
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Gender Options: Offered in both male and female versions to suit your cable and panel mounting needs.
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Material Compatibility: The PC/PA66 housing and gold-plated brass contacts provide a balance of durability and signal integrity.
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Environmental Protection: The IP68 rating ensures protection against dust ingress and prolonged immersion, making it suitable for demanding applications.
Application Scope and Boundaries
The SP21 connector is well-suited for smart control cabinets, automation equipment, and outdoor electrical installations where moisture and dust resistance are critical. However, it is not intended for high-voltage power distribution or applications requiring frequent mating cycles beyond its rated design. For high-vibration environments, verify that the connector's locking mechanism meets your specific mechanical requirements.
Installation and Configuration Guidance
To ensure a proper fit, confirm the following details before ordering:
- Required pin count and gender (male or female) for your application.
- Cable diameter and termination method (solder, crimp, or screw) compatible with your wiring.
- Mounting style—panel mount, cable mount, or inline—based on your enclosure design.
- Specific environmental conditions, such as temperature range and exposure to chemicals, to validate the housing material suitability.
For a broader range of industrial interconnection options, review the 12G Series Circular Connectors or the LD20/SP20 Industrial Flange Connector for related solutions.
Inquiry Checklist for Accurate Quoting
When submitting an inquiry, include the following information to receive an accurate quotation and technical confirmation:
- Exact model number and series (SP21).
- Number of cores and gender required.
- Desired cable length and wire gauge.
- Mounting configuration and any specific housing color or marking needs.
- Application environment details (e.g., outdoor, chemical exposure, temperature extremes).
For further assistance in selecting the right connector for your smart electrical control box, contact our engineering team with your project specifications.
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