RS31515
Stackable 60V, 15A eFuse with Hot Swap Protection and Current Monitoring
Features
Electrical & Power Features
- The RS31515 supports a wide input voltage range: 6V to 60V
- Maximum 15A output current
- Integrated 7mΩ power MOSFET
Monitoring & Control
- Integrated current sense and current monitor
- Adjustable current limit threshold
- Adjustable output soft start time and insertion delay time
Protection Features
- Input OV, output short-circuit, over-temperature, FET short protections
- Fault indication signal
- Selectable protection mode: Latch or auto-retry
Scalability & System Integration
- Paralleled operation for higher current applications
Description
High-Performance 15A Stackable eFuse for 6V to 60V Power Distribution
The RS31515 is a high-performance 15A stackable eFuse designed to provide intelligent circuit protection for distributed power systems operating from 6V to 60V. Integrating a low 7mΩ power MOSFET, programmable current limiting, precision current monitoring, configurable startup timing, and comprehensive fault protection, the RS31515 simplifies the design of reliable power distribution architectures while reducing external component count.
Unlike conventional fuses, the RS31515 continuously monitors system conditions and actively responds to overcurrent, short-circuit, overvoltage, and overtemperature events before damage can occur. Whether used as a standalone protection device or connected in parallel with additional RS31515 devices, it provides a flexible and scalable solution for industrial, server, networking, telecommunications, storage, and embedded computing applications.
Why Choose the RS31515?
As distributed power architectures continue to deliver higher current levels, designers need protection devices that offer more than simple overcurrent shutdown. The RS31515 combines intelligent fault protection, precision current monitoring, and configurable startup behavior into a compact solution that improves system reliability while simplifying power design.
Intelligent Active Protection
The RS31515 actively limits fault current and safely disconnects the load during abnormal operating conditions, helping protect both the power source and downstream electronics from excessive electrical stress.
Stackable for Higher Current Systems
Multiple RS31515 devices can be connected in parallel to increase system current capability while maintaining coordinated protection and active current sharing. This stackable architecture provides a straightforward path to higher-current designs without requiring larger discrete protection circuits.
Key Features of the RS31515
Wide 6V to 60V Operating Range
Supporting input voltages from 6V to 60V, the RS31515 is suitable for a broad range of distributed power architectures, including 12V, 24V, and 48V systems commonly used in industrial automation, telecommunications, and server equipment.
Low-Loss Integrated 7mΩ MOSFET
The integrated low-resistance MOSFET minimizes conduction losses and voltage drop, improving overall system efficiency while reducing PCB area and component count.
Programmable Current Limiting
An external resistor programs the current limit threshold, allowing designers to optimize protection for specific loads while minimizing nuisance trips during normal operation.
Configurable Startup Timing
Programmable soft-start and insertion delay reduce inrush current during startup, protecting downstream converters and minimizing stress on input power supplies.
Integrated Current Monitoring
Unlike conventional protection devices, the RS31515 includes an integrated analog current monitor output that provides a signal proportional to load current.
Improve System Visibility
The current monitor output allows system controllers to continuously monitor power consumption and verify normal operation.
Simplify Diagnostics
Real-time current information enables faster fault diagnosis and helps identify abnormal load conditions before they become critical failures.
Enable Predictive Maintenance
Current trend analysis can be used to detect equipment degradation, allowing preventative maintenance before unexpected downtime occurs.
Comprehensive Protection Features
The RS31515 integrates multiple protection mechanisms to improve system reliability while minimizing external circuitry.
Integrated Protection Includes
- Programmable overcurrent protection
- Fast short-circuit protection
- Input overvoltage protection
- Overtemperature protection
- FET short detection
- Open-drain FAULT output
- Selectable latch-off or auto-retry fault recovery
Together, these features help prevent costly damage to downstream power converters, processors, storage devices, and communication equipment.
Designed for Distributed Power Systems
The RS31515 is optimized for protecting intermediate and distributed DC power rails where efficiency, reliability, and scalability are critical.
Industrial Automation
Protect PLCs, motor controllers, industrial computers, and factory automation equipment from overloads and fault conditions while improving system uptime.
Server and Data Center Infrastructure
Provide intelligent protection for intermediate bus converters, server power distribution, storage platforms, and auxiliary power rails.
Networking and Telecommunications
Safeguard switches, routers, base stations, and telecommunications infrastructure with programmable protection and integrated current monitoring.
Embedded Computing
Protect distributed power rails used by embedded processors, edge computing systems, and high-performance industrial electronics.
Scalable Power Distribution Made Simple
One of the key advantages of the RS31515 is its ability to support scalable power architectures. As system power requirements increase, multiple devices can be connected in parallel to expand current capability while maintaining coordinated protection and active current sharing.
This approach enables designers to build flexible power systems using a common protection platform, simplifying inventory management and reducing development time across multiple products.
Part of Reed Semiconductor’s Intelligent eFuse Portfolio
The RS31515 is part of Reed Semiconductor’s growing family of intelligent circuit protection solutions designed for modern power systems.
Related products include:
- RS31515 – 6V to 60V, 15A analog stackable eFuse with integrated current monitoring.
- RS31512 – PMBus™-enabled stackable eFuse for intelligent 48V front-end protection.
- RS31389 – Analog stackable eFuse for intermediate bus and point-of-load applications.
- RS31390 – PMBus-enabled eFuse with digital configuration, telemetry, and precision system monitoring.
Whether protecting industrial equipment, networking infrastructure, or high-performance server power rails, Reed Semiconductor offers scalable eFuse solutions that combine intelligent protection, precision monitoring, and reliable fault management.
RS31515 can be connected in parallel for higher current applications.
The device is available in QFN-30, 5×5 mm package.
