Heavy-Duty 3-Core Power Connector 50A IP68

LD20/SP20 Heavy-Duty Square Connector Dimensions and Specs

Why the 3-Core Heavy-Duty Power Connector Fits High-Power EV Charging

When you are building or upgrading an EV charger, the connection point between the cable and the equipment is where reliability is won or lost. A 3-core heavy-duty power connector rated at 50A is designed to carry continuous high current without excessive heat rise, while its IP68-rated seal protects the contacts from moisture, dust, and temperature swings. This makes it a practical choice for outdoor charging stations, workshop power distribution, and industrial equipment that must keep running in harsh conditions.

Before you order, check that the connector's rated current matches your charger's maximum output, not just the average load. A 50A rating gives you headroom for peak demand, but the cable gauge and termination method must also support that current over the full cable length. If you are unsure about derating at higher ambient temperatures, ask the supplier for the temperature-corrected current rating.

Key Decision Points for Your Application

• Current rating vs. real load: Confirm the 50A rating applies to your operating voltage and ambient temperature range. Continuous charging at maximum output may require derating.
• IP68 protection: The seal keeps out dust and temporary immersion, but verify the connector is mated and locked correctly before relying on the waterproof rating. Unmated connectors are not protected.
• 3-core configuration: Typically used for live, neutral, and earth in single-phase systems. Confirm your charger's wiring scheme matches before installation.
• Mechanical build: A sturdy housing and secure locking mechanism reduce vibration loosening, which is critical for outdoor or mobile installations.

Installation and Maintenance Notes

Installation is straightforward if you follow the manufacturer's torque specifications for the terminal screws and use the recommended cable diameter range. Over-tightening can damage the contact, while under-tightening increases contact resistance and heat. Periodically inspect the seal and locking mechanism, especially after extreme weather or frequent plugging cycles.

When This Connector Is Not the Right Fit

If your application requires frequent mating under load, a connector with a higher mating-cycle rating may be more suitable. For DC fast charging with voltages above 600V, verify the connector's rated voltage and creepage distances. This 3-core model is best suited for AC power distribution and equipment connections where the mating frequency is moderate.

Next Step: Confirm Your Wiring and Order

Before purchasing, confirm the pinout, cable entry size, and mounting style match your enclosure. If you need a different pin count or a higher IP rating for submersion, check the aviation plug connector range for alternative options. For a detailed dimensional reference, review the LD20/SP20 heavy-duty square connector dimensions to verify panel cutout and mating envelope.

If you have a specific charger model or cable specification in mind, send your wiring diagram and load profile to the sales team for a compatibility check before ordering.