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Texas Instruments TL431BQPKG3 — Analog & Data Acquisition

TL431BQPKG3 shunt reference, ±0.5% tolerance, SOT-89-3

MPNTL431BQPKG3
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Texas Instruments TL431BQPKG3, adjustable shunt voltage reference, ±0.5% tolerance, 100 mA output, 2.495 V reference, SOT-89-3 package, -40 to 125 °C.

$0.4500Ref. price · indicative, final on quote
Texas Instruments TL431BQPKG3 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

TL431BQPKG3 specifications
ParameterValue
Output typeAdjustable
MountingSurface Mount
Reference typeShunt
Voltage - output36 V
Voltage - output (Min (Fixed))2.495V
Output current100 mA
Current - cathode700 µA
Operating temperature-40°C~125°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
Tolerance±0.5%
CaseTO-243AA

Product details

Precision shunt reference in a SOT-89-3

The Texas Instruments TL431BQPKG3 is an adjustable shunt voltage reference with a ±0.5% tolerance — the tightest bin in the TL431 family, suited for precision regulated supplies, comparator thresholds, and isolated feedback loops where the generic ±1% or ±2% parts leave too little margin. It delivers up to 100 mA cathode current with a minimum operating current of 700 µA, so the bias resistor can be sized for a wide range of load and line conditions without dropping out of regulation.

Frequently asked questions

What is the tolerance of TL431BQPKG3?

The TL431BQPKG3 has a ±0.5% tolerance on the reference voltage, which is the tightest bin in the TL431 family and suits precision regulator or comparator circuits.

What are alternatives to TL431BQPKG3?

Any TL431-family part with the same SOT-89-3 package is a pin-compatible alternative, but only the 'B' grade offers the ±0.5% tolerance — standard TL431 parts are typically ±1% or ±2%.

What package is TL431BQPKG3?

The TL431BQPKG3 comes in a SOT-89-3 surface-mount package, also designated TO-243AA, with a large collector tab for heat sinking.