SD20 2-Pin 25A Waterproof Aviation Connector Kit (IP68, Panel Mount)

Specifications

• Series: SD20 (20mm Panel Cutout)

• Pin Count: 2 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, flame-retardant nylon

• Protection: Tethered Dust Cap included

Key Applications and Projects

• Custom Solar Generators: Creating a waterproof, heavy-duty input port on an ammo can to connect external portable solar panels.

• Marine Electronics: Wiring trolling motors, high-power floodlights, or bilge pumps on boats where saltwater exposure is a constant threat.

• E-Bike / Scooter Charging: Installing a rugged, quick-disconnect charging port that can safely handle the high amperage of fast chargers without melting.

Unlock New Capabilities (Project Evolution) The Ultimate Off-Grid Power Box: Don't rely on fragile barrel jacks for your emergency power station! Upgrade your DIY 12V LiFePO4 battery box by replacing standard connectors with this SD20 aviation plug. Use the panel-mount female socket as your primary high-current output. Because the socket is protected by the tethered cap, your battery box remains completely waterproof during transport. When you reach your campsite, unscrew the cap and attach the male plug to run heavy-duty 12V appliances like portable refrigerators or high-wattage air compressors!

PACKAGE INCLUDED

• 1 x SD20 2-Pin Male In-Line Plug

• 1 x SD20 2-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 and size. It specifically means the female panel-mount socket requires a 20mm diameter circular cutout in your enclosure to mount properly.

2. What is the maximum current this connector can handle? This specific 2-pin model is rated for a massive 25 Amps of continuous current.

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

4. How do I attach wires to this connector? Both the male plug and the female socket feature large gold solder cups on the rear. You must strip your wire, tin it, and solder it directly into these cups.

5. What wire gauge should I use for 25A? To safely carry 25A, you should use at least 12AWG copper wire, or 10AWG if your cable run is particularly long.

6. Does the package include both halves of the connector? Yes, this is a complete set. It includes the male in-line plug, the female panel-mount socket, and the protective dust cap.

7. How do I prevent water from entering the back of the male plug? The rear of the male plug features a blue compression nut (cable gland). When you tighten this nut, an internal rubber seal compresses around the outer jacket of your cable, making it watertight.

8. Is there a way to identify positive and negative? Yes. If you look closely at the face of the black plastic housing, the pins and receptacles are numbered (typically 1 and 2) to help you maintain correct polarity during wiring.

9. What is the purpose of the tethered black cap? The cap screws onto the female panel-mount socket when the male plug is disconnected. This keeps water and dirt out of your enclosure when the port is not in use.

10. How do the two halves lock together? The male plug features a large blue threaded collar. Once you push the plug into the socket, you twist this blue collar to mechanically lock the two halves together.

11. Can I plug this in backward and reverse the polarity? No. The black plastic shroud on the male plug and the inner molding of the female socket are keyed (they have a specific notch/groove design) so they can only be mated in one correct orientation.

12. What material are the contacts made of? The internal pins, receptacles, and rear solder cups are made of brass and are gold-plated for superior conductivity and corrosion resistance.

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

14. Can this be used for AC mains voltage (110V/220V)? While the insulation can withstand higher voltages, this connector is primarily designed and highly recommended for high-current, low-voltage DC applications (12V, 24V, 48V). Always consult a licensed electrician before using non-standard connectors for AC mains power.

15. Is it safe to disconnect this while power is flowing? It is generally not recommended to disconnect high-current connectors under a heavy load, as it can cause electrical arcing that damages the gold contacts over time. Turn off the power source before disconnecting if possible.

16. Are the pins on the male or female side? In this specific set, the male plug housing contains the two gold protruding pins, while the female panel-mount socket contains the two gold receptacles.

17. What do the solder cups look like? The solder cups are large, half-cylinder gold extensions on the back of the connectors, designed to cradle the stripped wire while you apply solder.

18. 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 and potentially break the housing.

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) set to a high temperature to ensure a proper, shiny solder joint.

20. Will the plastic melt while soldering? The housing is made of a high-temperature resistant nylon, but prolonged exposure to extreme heat from an iron can soften the plastic and shift the pins. It is highly recommended to mate the plug and socket together before soldering; the opposing half will hold the pins perfectly in alignment while the plastic cools.