Firduo 120A High Current and High Voltage Waterproof Plug Socket for Electric Hydrofoil & Surfboard

🔌 120A. IP68. Built for High-Current Water Sports.

The Firduo 120A High Current Waterproof Plug Socket (TP ZX) is a heavy-duty IP68-rated connector engineered for high-current, high-voltage applications in electric hydrofoil, eFoil, electric surfboard, and marine power systems. Using "Sprtac" series wire spring technology, the connector delivers large current carrying capacity with reliable, low-resistance contact — critical for sustained 120A loads in demanding water sport environments.

The threaded anti-loose connection structure prevents accidental disconnection under vibration and mechanical stress. The high-performance plastic shell meets harsh environmental requirements, and the crimping terminal technology with claw-positioning ensures fast, secure assembly. A single-variant plug socket (TP ZX) designed for direct battery-to-ESC or ESC-to-motor high-current connections.

⚡ Key Features

• ✅ IP68 Waterproof — fully sealed for continuous underwater operation in saltwater and freshwater
• ✅ 120A High Current Rating — handles sustained high-current loads for eFoil, hydrofoil, and marine ESC connections
• ✅ "Sprtac" Wire Spring Technology — large current carrying capacity with reliable, low-resistance contact
• ✅ Threaded Anti-Loose Structure — secure connection that resists vibration, impact, and mechanical stress
• ✅ Multiple Installation Methods — adapts to different mounting requirements and enclosure configurations
• ✅ High-Performance Plastic Shell — meets harsh environmental requirements including saltwater, UV, and temperature extremes
• ✅ Vibration & Impact Resistant — maintains connection integrity under the dynamic loads of water sports
• ✅ Crimping Terminal Technology — reliable wire-to-terminal connection with claw-positioning for fast, accurate assembly

📋 Full Specifications

📦 What's in the Box

• 1× TP ZX Plug (male)
• 1× TP ZX Socket (female)

⚠️ Cables not included. Ensure wire gauge is rated for required continuous current (typically 6AWG–10AWG silicone wire).

🔗 Compatible Builds & Recommended Pairings

• eFoil / Electric Hydrofoil — main battery-to-ESC connection for 120A continuous drive systems
• Electric Surfboard / Jetboard — high-current power connector for waterproof ESC enclosures
• Marine ESC / ROV — IP68 sealed for continuous underwater power connections
• Higher Current Option: Firduo 120-250A Waterproof Power Connector — for builds requiring up to 250A continuous current
• Lower Current Option: Firduo 50A Self-Locking IP67 Waterproof Connector — for auxiliary circuits and lower-current connections
• Round/Square Socket Variants: Firduo 120A Waterproof Connector (Round & Square) — alternative mounting configurations for panel or enclosure installation
• Recommended Anti-Spark Switch: Firduo 200A Anti-Spark Switch — pair with this connector to prevent arcing on battery connection

🛠️ Setup Guide

1. Select correct wire gauge — for 120A continuous current, use 8AWG silicone wire minimum. 6AWG is recommended for runs longer than 300mm or for peak currents above 120A. Ensure the wire OD fits through the connector's cable entry before cutting to length.
2. Strip and prepare the wire — strip 6–8mm of insulation from the wire end. Twist the strands tightly to prevent fraying. For best results, it is recommended to use flux to improve contact quality.
3. Thread wire through cable entry first — before attaching the terminal, thread the wire through the connector's cable gland or entry nut. Do not skip it.
4. Welding the terminal — insert the stripped wire end into the terminal barrel and use a high-power welding machine suitable for this terminal size.. A proper welding should be gas-tight with no exposed copper. Pull-test the welding — it should not slip under firm tension.
5. Mounting connector terminal nut housing — Tug gently to confirm it is seated. Tighten the cable entry nut to seal around the wire jacket.
6. Mate plug and socket — align the TP ZX plug and socket and push together, then rotate clockwise to engage the threaded anti-loose structure. The connection is secure when fully threaded. To disconnect, rotate counter-clockwise and pull — do not force-pull without releasing the thread.
7. Test before powering — verify continuity with a multimeter across the mated connector. Check that no conductor is exposed and the cable entry seal is tight. For saltwater use, apply dielectric grease to the mating faces to prevent corrosion.

❓ FAQ

Q1: What is the difference between the TP ZX and the Round/Square socket variants?
The TP ZX (this product) is a plug socket — a direct inline connector where plug meets socket for cable-to-cable connection. The Round and Square socket variants are panel-mount or enclosure-mount configurations — designed to be installed through a panel or enclosure wall. Choose TP ZX for inline cable connections; choose Round/Square for panel-mount installations.

Q2: Is this connector truly IP68? Can I use it for continuous underwater connections?
Yes. The TP ZX is rated IP68 — fully sealed for continuous underwater operation beyond 1 meter depth. This makes it suitable for underwater motor wiring, submerged ESC connections, and marine applications where the connector may be permanently or intermittently submerged. Ensure the cable entry nut is fully tightened and the wire jacket OD matches the entry specification to maintain the IP68 seal.

Q3: What wire gauge should I use for 120A?
For 120A continuous current, use a minimum of 8AWG silicone wire. For longer cable runs (300mm+) or peak currents above 120A, 6AWG is recommended to reduce voltage drop and heat buildup. Silicone insulation is preferred over PVC for flexibility and heat resistance in eFoil and marine applications. Ensure the wire OD fits through the connector's cable entry before cutting.

Q4: Do I need an anti-spark switch with this connector?
Yes — strongly recommended. When connecting a high-current battery to an ESC, the capacitors inside the ESC draw a large inrush current that causes arcing at the connector. This arcing damages the connector contacts over time and can cause connection failure. The Firduo 200A Anti-Spark Switch eliminates this arcing by pre-charging the ESC capacitors before full current flows through the connector.

Q5: Can I use this connector for the main battery-to-ESC connection on my eFoil?
Yes — the TP ZX is rated for 120A continuous, making it suitable for the main battery-to-ESC connection on most eFoil builds using the 65111 motor (100A max) or similar. For builds using the 65162 motor with a 200A ESC at full power, consider the Firduo FD08-250A Waterproof Power Connector which is rated for 250A continuous and provides additional current headroom for peak loads.