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STMicroelectronics TL431CZ — Analog & Data Acquisition

STMicroelectronics TL431CZ Shunt Reference, ±2.21% TO-92

MPNTL431CZ
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STMicroelectronics TL431 series adjustable shunt voltage reference, TL431CZ, TO-92-3 through-hole package, ±2.21% tolerance, 2.495 V reference, 100 mA output, Bulk.

$0.4100Ref. price · indicative, final on quote
STMicroelectronics TL431CZ datasheet (PDF)
PackagingTO-226-3, TO-92-3 (TO-226AA)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

TL431CZ specifications
ParameterValue
Output typeAdjustable
MountingThrough Hole
Reference typeShunt
Voltage - output36 V
Voltage - output (Min (Fixed))2.495V
Output current100 mA
Current - cathode1 mA
Operating temperature0°C ~ 70°C (TA)
PackageBulk
Tolerance±2.21%
CaseTO-226-3, TO-92-3 (TO-226AA)

Product details

Reference voltage and output drive

The TL431CZ is an adjustable shunt voltage reference with a 2.495 V minimum output and a 36 V maximum, delivering up to 100 mA to the load. The cathode current requirement is 1 mA minimum, so the bias resistor must be sized to keep at least that much current flowing through the device at all times. The ±2.21% initial tolerance sets the worst-case output voltage spread across the operating temperature range of 0°C to 70°C. For a 5 V rail derived from the TL431, the output could vary by roughly ±110 mV before adding resistor-divider error — a consideration for precision bias or comparator thresholds.

Housed in the TO-92-3 (TO-226AA) through-hole package, the TL431CZ suits point-to-point wiring or prototyping on perfboard.

Frequently asked questions

What is the closest pin-compatible alternative to TL431CZ in this Analog & Data Acquisition family?

Any TO-92-3 packaged TL431 from STMicroelectronics or other manufacturers with the same base number (TL431) is pin-compatible. The TL431CZ is the commercial temperature grade (0°C to 70°C) with ±2.21% tolerance; other grades offer tighter tolerance or wider temperature range in the same footprint.

What compliance documentation does STMicroelectronics provide for TL431CZ?

The TL431CZ is ROHS3 Compliant per the manufacturer's status. Standard STMicroelectronics documentation includes the datasheet and ROHS declaration of conformity.