RS31211DR

Hot Swap Controllers Overview

The RS31211DR is a simple electronic fuse (eFuse) protection switch manufactured by Reed Semiconductor Corp. Designed for 3.3V applications, this integrated circuit features an internal pass MOSFET with a typical on-resistance of 34mΩ. It supports a maximum continuous current of 4A and is housed in an 8-WSON package with dimensions of 2x2 mm. The device integrates protection mechanisms suitable for hot swap controller applications.

Hot Swap Controllers Feature Summary

• Integrated 34mΩ pass MOSFET for low insertion loss
• Designed as a simple 3.3V eFuse protection switch
• Supports hot swap controller functionality

Hot Swap Controllers Applications

• Motherboard protection circuits
• Hot swap controller applications
• 3.3V power rail protection

Hot Swap Controllers Procurement Notes

Verify the manufacturer part number RS31211DR against official Reed Semiconductor Corp documentation to ensure authenticity. Confirm the package type is 8-WSON (2x2 mm) and that the component status is active. Check for specific marking codes such as 211D if required for identification purposes during quality assurance processes.

Hot Swap Controllers Selection Notes

Select the RS31211DR when a dedicated 3.3V eFuse solution is required for motherboard or system-level power distribution. This component is appropriate for designs needing integrated overcurrent protection with a 4A capacity and low RDS(on). Ensure the application voltage aligns with the 3.3V specification rather than the 5V or 12V variants available in the same family.

Hot Swap Controllers Part Context

This component belongs to the RS312xx series of simple eFuse protection switches from Reed Semiconductor Corp. The series includes variants for different input voltages, such as the RS31212 for 5V and RS31311 for 12V. The RS31211DR specifically targets 3.3V systems, offering a compact 8-WDFN exposed pad package for space-constrained PCB layouts.

Hot Swap Controllers Replacement Considerations

Direct substitutes within the same family include the RS31212 for 5V applications and RS31311 for 12V applications. Verify pin compatibility and voltage ratings before swapping. No other cross-manufacturer equivalents are confirmed in public documentation.