SAMIN is a smart electronic fuse (eFuse) for subsea machinery and power systems — a resettable, programmable, and remote-controlled alternative to traditional one-shot fuses. It combines intelligent bidirectional current limiting, inrush control, and sub-2 µs short-circuit protection with continuous predictive monitoring of current, voltage, temperature, and power. Supporting up to 450 VDC (SAMIN400) and 850 VDC (SAMIN800) at 100 A or 300 A, SAMIN learns each load’s normal behaviour to tell real faults from harmless transients, and it reports faults and resets remotely over RS-485 / Modbus RTU. Available as a bare PCBA, a DIN-rail module, or packed in a pressure-rated subsea enclosure depth-rated to 4000 m, SAMIN suits ROVs, Li-ion battery systems, DC motor controllers, and power distribution units.
- Resettable protectionConfigurable latch or auto-retry reset — no blown fuse to replace on the seabed, unlike a traditional one-shot fuse.
- Programmable current limitsSoftware-set current limits (0.5–120 A on SAMIN400, 1–350 A on SAMIN800) with user-defined trip thresholds.
- Remote control & resetRemote configuration, threshold adjustment, fault reporting, and reset over RS-485 / Modbus RTU.
- Ultra-fast protectionSub-microsecond (< 2 µs) short-circuit response, with bidirectional current limiting and inrush control.
- Predictive monitoringContinuous current, voltage, temperature, and power monitoring with trend-drift detection, load learning, and a thermal-stress counter.
- Learning-based logicAdapts to each load’s normal profile to distinguish real faults from transients and reduce false trips.
- High-voltage capableRated to 450 VDC (SAMIN400) and 850 VDC (SAMIN800) for modern HVDC subsea and battery systems.
- PCBA, DIN-rail, or subsea enclosureAvailable as a bare PCBA for OEM integration, a DIN-rail module for cabinet or topside mounting, or packed in a pressure-rated subsea enclosure for deployment to 4000 m.
Model range
| SAMIN400 | SAMIN800 | |
|---|---|---|
| Nominal voltage | 400 VDC | 800 VDC |
| Voltage range | 20–450 VDC | 380–860 VDC |
| Nominal current | 100 A | 300 A |
| Max current | 120 A | 350 A |
| Adjustable limit | 0.5–120 A | 1–350 A |
| Trip response | < 2 µs | < 2 µs |
| Communication | RS-485 / Modbus | RS-485 / Modbus |
| Isolation barrier | 1500 V | 1500 V |
| Deployment | PCBA / DIN-rail / enclosure to 4000 m | PCBA / DIN-rail / enclosure to 4000 m |
- Type
- Subsea smart electronic fuse (eFuse)
- Voltage rating
- 450 VDC (SAMIN400) / 850 VDC (SAMIN800)
- Current rating
- 100 A / 300 A (higher options)
- Adjustable limit
- 0.5–120 A / 1–350 A (software)
- Trip response
- < 2 µs (short-circuit)
- Reset
- Latch or auto-retry (configurable)
- Communication
- RS-485 / Modbus RTU
- Isolation
- 1500 V barrier
- Form factor
- Bare PCBA, DIN-rail module, or subsea enclosure
- Depth rating
- up to 4000 m
Specifications subject to change without notice.
FAQ
Subsea smart fuse FAQs
What is a subsea resettable fuse?
A subsea resettable fuse is an electronic fuse (eFuse) that trips to protect a circuit and is reset rather than replaced. SAMIN offers configurable latch or auto-retry reset, so there is no blown fuse to swap out at depth.
Is SAMIN a programmable fuse?
Yes. SAMIN is a programmable electronic fuse: current limits and trip thresholds are set in software (0.5–120 A on SAMIN400, 1–350 A on SAMIN800), with configurable control modes and diagnostics.
Can the fuse be controlled remotely?
Yes. Over RS-485 / Modbus RTU you can remotely configure thresholds, monitor status, report faults, and reset the fuse — a fully remote-controlled subsea fuse.
How does predictive monitoring for subsea machinery work?
SAMIN continuously measures current, voltage, temperature, and power, then applies trend-drift detection, load learning, repetitive-inrush detection, and a thermal-stress counter to flag abnormal conditions before they cause failure.
How deep can SAMIN be deployed?
SAMIN is available as a bare PCBA for OEM integration, as a DIN-rail module for cabinet or topside mounting, or packed in a pressure-rated subsea enclosure depth-rated up to 4000 m.
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