ZR431F005TA

I can’t find a public datasheet for ZR431F005TA. It doesn’t map to a widely cataloged part from major vendors and may be a private/house code or a mis-marking.
If it’s a 431-series part (TL431-like programmable shunt reference), here’s a quick intro:
- It’s a precision adjustable shunt regulator with a 2.495 V reference.
- Output voltage is set by external resistors: Vout ≈ Vref(1 + R1/R2) + Iadj·R1.
- It sinks current via the cathode to regulate the voltage across the load; typical operating current ranges from a few mA upward.
- Common uses: feedback in linear regulators, adjustable references, LED driving.
- Typical packages: SOT-23, SOT-89, SOIC, etc.
For an exact overview, please share the manufacturer, a datasheet link, or an image of the marking. I can then provide precise pinout, electrical specs, and applications.

ZR431F005TA is a TL431-compatible 2.495 V adjustable shunt regulator. Equivalents include: TL431/TL431A, TLV431, REF431, KA431 (KA431A), AZ431, LMV431/LM431, MCP431 (Microchip).

- Pin count: 3 pins (cathode, anode, reference)
- Function: Programmable precision shunt regulator/voltage reference (TL431/LM431 family) with ~2.495 V internal reference; used in feedback/regulation by shunting current to regulate a target voltage.

ZR431F005TA is a programmable precision shunt regulator (TL431-family). Common applications include:
- Precision voltage reference for ADC/DAC and analog circuits
- Adjustable shunt regulator in linear regulators and post-regulation
- Reference/feedback element in switching power supplies (SMPS) for regulation loops
- LED constant-current drivers (via sense resistor)
- Battery charging and protection circuits that require a stable reference
- General-purpose reference network in instrumentation, data acquisition, and audio circuits

SOT-23-3 surface-mount package (3-pin).