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Texas Instruments TL431AQDBVRE4 — Analog & Data Acquisition

TL431AQDBVRE4 Shunt Voltage Reference, ±1%, SOT-23-5

MPNTL431AQDBVRE4
Obsolete

Texas Instruments TL431AQDBVRE4, adjustable shunt voltage reference, ±1% tolerance, 2.495V min / 36V max output, 100 mA cathode current, SOT-23-5 package, -40°C to 125°C.

Texas Instruments TL431AQDBVRE4 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

TL431AQDBVRE4 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)
Tolerance±1%
CaseSC-74A, SOT-753

Product details

What this shunt reference does on the board

It sets a precise output from 2.495 V up to 36 V using two external resistors, with a ±1% tolerance that qualifies it for tighter-regulation designs than the standard ±2% TL431B grade. The part sinks up to 100 mA of cathode current and requires a minimum of 700 µA to stay in regulation, which sets the bias resistor sizing in a typical shunt configuration.

Obsolete — sourcing the last buys and surplus channel

The TL431AQDBVRE4 comes in a SOT-23-5 package (also designated SC-74A), a five-pin surface-mount footprint with 0.95 mm pitch. It is a hand-solderable size under a hot-air station — the small thermal mass means the part heats quickly, so a low-temperature profile (around 240°C peak) with a short dwell keeps the junction intact.

Frequently asked questions

What is the best replacement for TL431AQDBVRE4?

There is no direct pin-compatible replacement with the same ±1% tolerance in the SOT-23-5 package that Texas Instruments has officially designated as a successor. The broader TL431 family includes active variants in different packages (e.g., SOT-23-3, TO-92) and tolerance grades (B-grade at ±2%, A-grade at ±1%), but none carry the exact TL431AQDBVRE4 order code. For a BOM requiring the SOT-23-5 footprint and ±1% tolerance, a cross-reference to a different manufacturer's TL431-equivalent in the same package may be necessary — confirm the pinout and reference voltage before substituting.