RS31212DR

Hot Swap Controllers Overview

The RS31212DR is a hot swap controller and eFuse protection switch manufactured by Reed Semiconductor Corp. It provides single-channel power management for motherboard applications, specifically designed as a 5V eFuse solution. The device integrates a low-resistance pass MOSFET with an on-resistance of 34mΩ to minimize conduction losses. It supports input voltage ranges from 2.97V to 18V and delivers up to 4A of current. Packaged in an 8-WSON (2x2) footprint, it offers compact integration for high-density circuit designs requiring robust overcurrent and thermal protection.

Hot Swap Controllers Feature Summary

• Integrated 34mΩ pass MOSFET for efficient power delivery
• Single-channel hot swap control capability
• Wide input voltage range supporting 2.97V to 18V operation
• Compact 8-WSON package design

Hot Swap Controllers Applications

• Motherboard power distribution
• Hot swap connector protection
• Peripheral slot power management

Hot Swap Controllers Procurement Notes

Verify the specific suffix DR indicates the tape-and-reel packaging configuration when ordering. Confirm the manufacturer is Reed Semiconductor Corp. to ensure component authenticity. Check for ESD sensitivity during handling and storage. Ensure the input voltage requirements align with the 2.97V to 18V specification before integration into the final system design.

Hot Swap Controllers Selection Notes

Select this component for applications requiring a dedicated 5V eFuse solution with integrated hot swap capabilities. The 34mΩ internal MOSFET makes it suitable for high-efficiency power paths where voltage drop must be minimized. Consider the 8-WSON package size for space-constrained PCB layouts. Ensure the load current does not exceed the 4A rating for reliable operation.

Hot Swap Controllers Part Context

This part belongs to the RS312xx series of simple eFuse protection switches from Reed Semiconductor Corp. The series includes variants for different voltage levels, such as 3.3V and 12V options. The RS31212DR specifically targets 5V systems, offering a standardized solution for protecting downstream components from electrical faults in consumer and industrial electronics.

Hot Swap Controllers Replacement Considerations

Cross-reference with other RS31212 variants like RS31212D or RS31212BR if different packaging or marking configurations are required. Verify pin compatibility and electrical specifications match exactly before substitution. No direct functional equivalents from other manufacturers are confirmed in public documentation.