SD20 4-Pin 25A Waterproof Aviation Connector Kit (IP68, Panel Mount)

Specifications

• Series: SD20 (20mm Panel Cutout)

• Pin Count: 4 Pins

• Current Rating: 25A per pin

• Waterproof Rating: IP68

• Mating Mechanism: Threaded Coupling (Blue Collar)

• Contact Material: Gold-plated Brass

• Termination Style: Solder Cups

• Housing Material: High-strength nylon

Key Applications and Projects

• Custom Solar Generators: Creating a waterproof, heavy-duty input port to connect external portable solar panels and communication lines.

• Marine Electronics: Wiring trolling motors, multi-channel high-power floodlights, or sensors on boats where saltwater exposure is a threat.

• Industrial Automation: Providing a secure, locking quick-disconnect for multi-phase stepper motors or high-amperage robotic actuators.

Unlock New Capabilities (Project Evolution) The Rugged All-Terrain Rover: Take your robotics projects outside without fear of the elements! Use this 4-pin SD20 connector as the central power umbilical for a heavy-duty, weatherproof rover. Assign two pins to deliver high-current power to the left-side drive motors and the other two pins to power the right-side motors. By mounting the panel socket to a sealed waterproof case containing your sensitive batteries, motor drivers, and microcontroller, you can build a completely modular robotic platform. When you are done driving through mud and puddles, simply unscrew the watertight 4-pin connector to detach the drive base and hose the chassis down safely!

PACKAGE INCLUDED

• 1 x SD20 4-Pin Male In-Line Plug

• 1 x SD20 4-Pin Female Panel-Mount Socket

• 1 x Tethered Waterproof Dust Cap

FREQUENTLY ASKED QUESTIONS (FAQ)

1. What does SD20 mean? "SD20" refers to the connector series, indicating it requires a ~20mm diameter cutout in your enclosure to mount the panel socket.

2. What is the specific panel cutout size required? It requires a 20.5mm circular cutout with a 19.3mm flat side (a D-hole) to prevent the socket from spinning.

3. What is the maximum current this connector can handle? This 4-pin model is rated for up to 25 Amps of continuous current per pin.

4. How many pins does this specific connector have? This version features exactly four gold-plated pins and corresponding receptacles.

5. How do I attach wires to this connector? You must solder your wires into the four large gold solder cups located on the rear of both the plug and socket.

6. What is the maximum cable diameter the plug can accept? The rear cable gland on the male plug accepts cables up to 12mm in diameter.

7. How long is the male plug assembly? The male plug has an overall length of 66mm.

8. How deep is the female socket? The female socket has a total length of 22mm.

9. Is this connector truly waterproof? Yes, it carries an IP68 rating. When properly mated and the blue collars are tightened, it is completely dust-tight and can be safely submerged in water.

10. What secures the dust cap to the socket? The black dust cap is permanently attached to the socket via a flexible black tether strap to prevent it from getting lost.

11. What color is the locking collar on the plug? The threaded locking collar and the rear cable gland compression nut are both blue.

12. What is the outer diameter of the socket's front face? The outer diameter of the panel-mount socket's mating face is 29mm.

13. Are the solder cups numbered for easy wiring? Yes, the black plastic housing features numbering molded directly next to the solder cups to help identify the four individual pins.

14. Do I need a special tool to tighten the panel nut? While a crescent wrench or spanner makes it easier, the panel lock nut on the female socket has a hex/slotted shape that can be tightened securely against your enclosure.

15. Can I use crimp connectors instead of soldering? No. These solid metal cups are strictly designed for solder termination. Crimping them will ruin the connection.

16. How do the two halves lock together? Once you push the male plug into the socket, you twist the large blue collar to mechanically thread and lock the two halves together.

17. Can I plug this in backward? No. The black plastic shroud on the male plug has specialized keying and notches that only allow the four pins to mate in one specific orientation.

18. What wire gauge should I use for 25A? To safely carry 25A, you should use at least 12AWG copper wire, ensuring it fits properly into the solder cups.

19. How hot should my soldering iron be? Because the gold solder cups and heavy-gauge wire act as large heatsinks, you will need a powerful soldering iron (60W or higher) to ensure a proper solder joint.

20. Will the plastic melt while soldering? The housing is heat-resistant, but prolonged exposure to extreme heat can soften the plastic. It is highly recommended to mate the plug and socket together before soldering so the opposing half holds the pins in perfect alignment as they cool.