PDK81301-2*1+(2*0.2+D)P Watertight Cable – 2 Power Conductors + Shielded Twisted Pair With Drain Wire, Tinned Copper, PP Insulation, TPU Jacket, For Subsea Control & Data

This PDK81301 hybrid watertight cable is specifically engineered for subsea and harsh‑environment applications requiring a compact combination of reliable power delivery and noise‑immune data transmission within a single water‑blocked cable. It integrates two 1.0 mm² (approx. AWG 17) power conductors for low‑voltage DC distribution (e.g., cameras, lights, or small sensors) and one shielded twisted pair (1×2×0.2 mm²) with an integral drain wire (D) , designated "P" for shielded construction – a design optimized for RS‑485, CAN, or 4‑20 mA differential signaling. All copper conductors are tinned to provide superior corrosion resistance in seawater and humid environments. PP (Polypropylene) provides primary insulation with excellent dielectric properties, very low moisture absorption, and stable electrical performance across a wide temperature range (-40°C to +105°C) – critical for long‑term underwater reliability. The outer jacket is extruded from TPU (Thermoplastic Polyurethane) , delivering outstanding abrasion, hydrolysis, and oil resistance, as well as flexibility for handling and deployment. The cable incorporates a multi‑layer watertight construction with water‑swellable tapes and pressure‑resistant fillers to prevent both radial and longitudinal water ingress. It is ideal for ROV tether sections, subsea sensor nodes, offshore instrumentation, and underwater camera systems – where compact power and shielded data transmission, corrosion resistance, and absolute watertight integrity are essential.

Key Features – Tinned Copper Conductors, PP Insulation, Shielded Pair with Drain Wire, TPU Sheath

Tinned copper conductors – two 1.0 mm² stranded cores for efficient power delivery (up to 6‑8 A per core); 0.2 mm² twisted pair for differential signals; tinning prevents galvanic corrosion and ensures long‑term reliability.

Shielded twisted pair with drain wire (1×2×0.2+D) – aluminum foil shielding with an integral tinned copper drain wire provides excellent EMI rejection and a convenient grounding point, ensuring clean signal transmission in electrically noisy subsea environments.

PP insulation – rated -40°C to +105°C; low dielectric constant, negligible moisture absorption, and resistance to seawater, acids, and alkalis – ensuring stable insulation performance over long‑term immersion.

TPU outer sheath – polyurethane jacket offers superior abrasion, cut, tear, and hydrolysis resistance; remains flexible even at low temperatures and resists oils, greases, UV, and marine fouling.

Watertight integrity – multi‑layer water‑blocking tapes and compact core filling prevent water migration along the cable, even under hydrostatic pressure.

Compact and flexible – small diameter and good flexibility facilitate easy routing, termination, and deployment in tight subsea spaces.

Ideal For

ROV and AUV tether sections requiring compact power (1.0 mm²) and shielded data (RS‑485/CAN) for cameras, lights, or sensors

Subsea sensor nodes and oceanographic instruments with combined power and serial communication

Offshore platform wellhead control and monitoring systems

Underwater camera systems with pan/tilt/zoom controls and power feeds

Marine renewable energy system sensors and actuators

Military underwater surveillance probes requiring compact power/data hybrid cabling

Any subsea application demanding 2 power cores + shielded pair with drain wire + watertight integrity without tension requirements

Conclusion

This PDK81301‑2*1+(2*0.2+D)P watertight cable provides a compact, reliable solution for subsea systems that need both power and shielded data transmission in a single, durable cable. The combination of tinned copper conductors, PP insulation, an individually shielded pair with drain wire, and a rugged TPU sheath ensures stable power delivery, interference‑free communication, and long‑term performance under hydrostatic pressure. It is an ideal choice for marine engineering, underwater instrumentation, and offshore control networks.

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