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Texas Instruments TL431AQDBZRG4 — Analog & Data Acquisition

TL431AQDBZRG4 Shunt Voltage Reference, ±1%, SOT-23-3

MPNTL431AQDBZRG4
End of Life

Texas Instruments TL431AQDBZRG4, adjustable shunt voltage reference, ±1% tolerance, 100 mA output, 2.495 V reference, SOT-23-3, -40°C to 125°C.

$0.4300Ref. price · indicative, final on quote
Texas Instruments TL431AQDBZRG4 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

TL431AQDBZRG4 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±1%
CaseTO-236-3, SC-59, SOT-23-3

Product details

Shunt reference with ±1% — the precision anchor for your rail

Rated for 100 mA continuous cathode current, it sinks the bias current for an optocoupler LED or sets the feedback divider in an isolated flyback converter. The 700 µA minimum cathode current keeps the device biased in its linear region across the full load range.

Industrial temperature range — one part for the whole BOM

Output voltage is adjustable from 2.495 V up to 36 V with two external resistors — the same divider formula used across the entire TL431 family, so the BOM calculation transfers directly from a TO-92 or SOIC-8 sibling.

The base number TL431 spans decades of supply — this SOT-23-3 variant is the go-to for new designs that need the precision in a small footprint.

Frequently asked questions

What is the tolerance of TL431AQDBZRG4?

The TL431AQDBZRG4 carries a ±1% initial tolerance on the 2.495 V reference, which is the standard precision grade for the TL431A suffix.

Is TL431AQDBZRG4 RoHS compliant?

Confirm with the supplier at quote time.

Is TL431AQDBZRG4 a direct replacement for TL431A?

The TL431AQDBZRG4 is a specific SOT-23-3 variant of the TL431A grade. It is pin-compatible and functionally identical to other TL431A devices in the same package, but the footprint differs from TO-92 or SOIC-8 variants — verify the PCB land pattern before substituting.

What is the maximum cathode current for TL431AQDBZRG4?

The maximum continuous cathode current is 100 mA, with a minimum cathode current of 700 µA required to maintain regulation.