6S-14S ZTW 120A ESC FOC HV OPTO Waterproof ESC Slim Profile For EFoil Propulsion

ZTW Dolphin 120A FOC HV OPTO Waterproof ESC 6-14S Slim-Profile for Underwater Drones and eFoil Propulsion

Slim-Profile FOC ESC for Compact Subsea Platforms

The Dolphin 120A FOC HV OPTO features an ultra-slim 19.5mm height profile, making it ideal for space-constrained underwater drones, e-foils, electric surfboards, and compact ROV thruster systems where enclosure height is limited.

100A Continuous / 120A Burst with FOC Efficiency

Delivering 100A sustained and 120A peak on 6-14S LiPo, this ESC leverages field-oriented control for smooth, efficient thrust. FOC reduces motor heating and acoustic noise — advantageous for stealthy underwater observation and extended battery runtime.

Ultra-Slim 19.5mm Enclosure

At just 105.5×53×19.5mm and 507g, the low-profile housing fits narrow electronics tubes and flat enclosures common in e-foils, underwater scooters, and streamlined AUV designs where every millimeter of height matters.

Parameterless Auto-Tuning

FOC with auto motor parameter identification enables plug-and-play integration. No manual timing or PWM settings required — a significant advantage for consumer and commercial marine products where setup simplicity is valued.

Optocoupler-Isolated Input

The HV OPTO design provides galvanic signal isolation, protecting battery management systems and controllers from high-current noise in the compact, electrically dense enclosures typical of water sports and small subsea vehicles.

Full Waterproof Marine Construction

Fully sealed waterproofing allows operation in direct water contact — essential for e-foils, electric surfboards, and diver propulsion vehicles where the ESC may be fully submerged during use.

Extended Leads, Shielded Cable & Upgradeable

8-gauge power (1145mm) and 10-gauge motor (145mm) wires support remote motor placement. The 26AWG shielded signal cable (1090mm) and field-upgradable firmware ensure reliable, future-proof performance.

Technical Specifications