SAMIN400V100A
Bidirectional Smart Protection for Subsea Power Systems
Samin400V100A is a smart electronic fuse engineered for subsea power systems operating at 400VDC and up to 100A. More than just overcurrent protection, it continuously monitors voltage, current, and power to learn the connected system’s behaviour. By recognizing abnormal patterns and predicting faults before they occur, it enables proactive maintenance and increases system reliability. Designed for harsh subsea environments, it ensures mission-critical uptime and safety without compromise.
Key Features
Bidirectional Protection
Unlike traditional fuses, the Samin400V100A detects and interrupts dangerous current in both directions, ideal for subsea battery systems and regenerative loads.
Inrush Current Control
Manages startup loads by limiting initial current draw, preventing stress on components and reducing breaker trips during equipment power-up.
Voltage & Power Monitoring
Real-time sensing of voltage, current, and power enables comprehensive insight into energy flow — critical for analyzing system performance in subsea environments.
Predictive Maintenance Alerts
Identifies subtle signs of component degradation or system stress by analyzing electrical trends over time helping prevent unexpected failures.
User-Configurable Settings
Flexible configuration of trip thresholds, delay timings, and response behaviors allows adaptation to different subsea loads and mission profiles.
Robust Subsea Design
Engineered for 400V DC at 100A and sealed for subsea deployment, the Samin400V100A is built for reliable performance under high pressure and extreme conditions.
Application Scenarios
From battery packs to motor drives, SAMIN400V100A adapts to safeguard and optimize your underwater infrastructure.
Subsea Batteries
High-voltage subsea battery packs require robust protection across both charge and discharge cycles, especially when used in dynamic, high-current environments. The Samin400V100A eFuse replaces traditional inrush limiters, reverse protection, and discrete fuses with an intelligent, compact, bidirectional solution.
It continuously monitors system behaviour, logging voltage, current, temperature, and fault conditions. This real-time awareness enables predictive maintenance, event diagnostics, and improved overall safety.
The eFuse operates autonomously or under serial control, adapting to variable loads such as ROV thrusters or recharging inputs from subsea energy harvesting systems. Its compact form factor makes it easy to embed within battery enclosures.
Fully compatible with existing battery management systems (BMS), the Samin400V100A adds high-level control and protection without disrupting legacy designs. It provides a value-added feature set for battery manufacturers aiming to deliver smarter, more resilient subsea energy systems.
Subsea Machinery
Subsea pumps, compressors, and other mission-critical equipment depend on stable, high-voltage DC supplies—yet remain vulnerable to undetected electrical anomalies and gradual system degradation.
The Samin400V100A eFuse offers more than protection; it learns your system’s behaviour over time. By continuously monitoring voltage, current, and power trends, it builds a profile of normal operation and flags early signs of malfunction, load imbalance, or aging components.
When paired with external sensors—such as vibration, temperature, or pressure probes—the eFuse becomes a core part of a health-monitoring ecosystem, offering layered insights into equipment condition.
Compact, rugged, and smart, it provides fault logging, event tracing, and predictive alerts—helping you extend equipment life, reduce downtime, and transition from reactive to condition-based maintenance.
Designed for seamless integration with both legacy control systems and modern digital twins, the Samin400V100A elevates how subsea machinery is protected and understood.
ROV and AUV Power Management
Modern ROVs and AUVs operate with increasingly complex payloads and energy-hungry propulsion systems, all powered by high-voltage onboard batteries or DC buses. In these mobile systems, smart power protection is vital, not just for safety, but for operational longevity.
The Samin400V100A eFuse enables intelligent current limiting, soft start capabilities, and real-time monitoring of power consumption. It protects both upstream and downstream systems while learning typical consumption patterns to identify deviations, such as degraded thrusters, aging controllers, or shorted payloads.
Its bidirectional capability supports both energy intake and discharge, making it ideal for regenerative braking or multi-source energy architectures. When integrated into the power rail of an AUV, Samin400V100A reduces unnecessary shutdowns by isolating faults precisely and autonomously.
Compact and rugged, it eliminates the need for bulky external protections, reduces wiring complexity, and integrates directly with vehicle telemetry systems. With Modbus communication, mission-critical alerts and consumption history can be logged and transmitted to the surface in real-time or post-dive.
This makes the Samin400V100A a foundational element in resilient, future-ready subsea vehicles.
Subsea Energy Storage Gateways
As offshore energy systems evolve, there’s growing demand for intelligent, modular subsea energy gateways that connect localized energy storage to downstream loads, such as pumps, instrumentation, or mobile vehicles. These hubs require advanced protection and monitoring at high voltages and currents.
The Samin400V100A eFuse acts as a smart protection and control layer, managing inrush currents, continuous discharge, and load-side faults. It supports bidirectional power flow, enabling both charging and discharging with predictive failure detection.
Designed for seamless integration, the eFuse works natively with battery management systems, ensuring coordinated operation with energy storage units. It learns the behaviour of connected loads and flags anomalies—like slow performance drift, rising current draw, or voltage sag—before critical failures occur.
The eFuse is ideal for multi-port subsea energy gateways used in remote installations where reliability is non-negotiable. With its Modbus interface and embedded intelligence, it reduces maintenance overhead and increases confidence in long-term autonomous operation.
Whether enabling battery-to-load switching or acting as an intelligent circuit breaker, the Samin400V100A brings smart control to the edge of subsea energy distribution.