TL431BMSDT,215

Overview

The TL431BMSDT,215 is a three-terminal shunt regulator from the TL431 series manufactured by Nexperia (formerly NXP Standard Products). It features an adjustable output voltage range between Vref and 36 V, set by two external resistors. The device offers a B-grade reference voltage tolerance of 0.5%. It operates within a temperature range of -40 °C to 125 °C and supports a sink current capability from 1 mA to 100 mA. The component is housed in a TO-236-3 (SOT-23) surface-mount package.

Feature Summary

• Programmable output voltage up to 36 V via external resistors
• High precision with 0.5% initial accuracy
• Wide operating temperature range suitable for industrial applications

Applications

• Shunt regulator circuits
• Precision constant current sinks
• Isolated feedback loops for Switch Mode Power Supplies (SMPS)

Procurement Notes

Verify the manufacturer designation carefully, as the standard product business formerly under NXP is now branded as Nexperia. Confirm that the suffix '215' corresponds to the specific tape and reel packaging configuration required for your assembly line. Ensure compatibility with the SOT-23 footprint during PCB layout verification.

Selection Notes

Select this component when a high-precision voltage reference with 0.5% tolerance is required in a compact surface-mount package. It serves as a direct replacement for legacy TL431 variants where mirrored pinning or specific Nexperia/NXP supply chains are preferred. Consider the thermal performance limits when designing for the upper end of the 125 °C operating range.

Part Context

This part belongs to the widely used TL431 family of programmable zener diodes. The 'BM' suffix typically denotes the B-grade accuracy (0.5%) and mirrored pinning configuration within the SOT-23 package family. These devices are industry-standard components for voltage regulation and reference applications across consumer, industrial, and automotive electronics.

Replacement Considerations

Compatible substitutes include TL431BFDT,215 and TL431BMFDT,215. Verify pinout orientation, as mirrored pinning configurations differ from standard pinning versions.