The TL431A in SOT233 is a compact, programmable shunt regulator designed to provide a precise reference voltage for feedback and regulation in power supplies and related circuits. This listing includes 5 pieces in the SOT233 package, making it ideal for surfacemount designs and hobby or professional projects alike. Key benefits Precise, adjustable reference: Use external resistor networks to set the desired output level in DCDC converters, linear regulators, battery chargers, and LED drivers. Replaces traditional zeners in feedback loops: Improves regulation accuracy and stability while reducing parts count. Compact SOT233 package: Small footprint for spaceconstrained layouts and easy automated assembly. Versatile and robust: Suitable for a wide range of consumer and industrial electronics that require a stable reference and regulation. Key attributes Functionality: Programmable shunt regulator (TL431 family) with an internal 2.495 V reference Compatibility: Works with external resistor dividers in feedback configurations to regulate voltages in various circuits; commonly used in DCDC regulator feedback and precision references Size: SOT233 3pin surfacemount package Material: Plastic SMD package suitable for standard PCB assembly Performance: Reference voltage of 2.495 V (nominal); supports external resistor networks to establish the regulated output; capable of handling typical shuntregulation currents in circuit designs; maximum cathodetoanode voltage rating up to 36 V; commonly used in lowprofile, precision regulation applications Package contents: 5 pieces per Specifications at a glance (typical expectations for TL431A in SOT233) Reference voltage: 2.495 V nominal Package: SOT233, surfacemount Maximum cathodetoanode voltage: up to 36 V Maximum cathode current: up to 100 mA (shunt regulator current capability in standard designs) Variant: TL431A (Aversion; common reference and features) Typical use cases DCDC regulator feedback: Use the TL431A as the feedback reference in a switching regulator to maintain a stable output voltage (for example, setting a precise 5 V, 3.3 V, or other rails) with external resistor dividers. Precision reference in power supplies: Implement a stable voltage reference in battery chargers or lab power supplies to improve regulation accuracy and transient response. LED driver and supervisor circuits: Use as a programmable reference in LED driver circuits or voltagemonitoring circuits to ensure consistent brightness and safe operating voltages. Why this product is useful Reliable, precision regulation in a tiny SOT233 footprint makes it easy to integrate into compact boards and modern gadgets. The 5piece package provides ample supply for multiple projects or production runs, reducing the need to reorder frequently. The TL431A's flexibility with external resistor networks enables for a wide range of voltages and applications without changing the device. This listing is aligned with the standard TL431A specifications and the SOT233 form factor, offering a convenient, compact solution for precise regulation and reference tasks in electronics projects and professional designs.