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Texas Instruments TL431ACLPR — Analog & Data Acquisition

TL431ACLPR Shunt Voltage Reference, Adjustable 2.495V to 36V

MPNTL431ACLPR
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Texas Instruments TL431ACLPR, adjustable shunt voltage reference, 2.495V reference, ±1% tolerance, 100 mA output, TO-92-3 through-hole package, 0°C to 70°C.

$0.1088Ref. price · indicative, final on quote
Texas Instruments TL431ACLPR datasheet (PDF)
PackagingTO-226-3, TO-92-3 (TO-226AA) Formed Leads
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

TL431ACLPR specifications
ParameterValue
Output typeAdjustable
MountingThrough Hole
Reference typeShunt
Voltage - output36 V
Voltage - output (Min (Fixed))2.495V
Output current100 mA
Current - cathode600 µA
Operating temperature0°C~70°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
Tolerance±1%
CaseTO-226-3, TO-92-3 (TO-226AA) Formed Leads

Product details

Its internal reference is trimmed to 2.495 V, adjustable up to 36 V via two external resistors. The ±1% tolerance is the A-grade bin.

The 2.495 V minimum output is the bandgap voltage; the adjustable range to 36 V covers common rails. The 100 mA output current can sink enough current to drive an optocoupler LED directly. The 600 µA minimum cathode current is the floor to keep the device regulating.

Package and mounting — a through-hole part in a surface-mount world

The TO-92-3 with formed leads is the classic three-lead transistor-style package, through-hole only. The leads are formed for direct PCB insertion or socketing.

The base product number TL431 is widely second-sourced; the A-grade ±1% tolerance and the CLPR suffix narrow the exact cross.

Frequently asked questions

Can the TL431ACLPR replace a standard TL431?

Yes — the TL431ACLPR is functionally identical to the base TL431 but with a tighter ±1% tolerance versus the standard ±2% grade. Pin-compatible in the same TO-92-3 package. The only restriction is the 0°C to 70°C commercial temperature range; if the original design used a TL431 with industrial or extended temperature, verify the thermal environment before substituting.

What is the closest functional second-source for the TL431ACLPR?

The LM4132AMF-4.1/NOPB is a series reference, not a shunt reference — it requires a supply rail and delivers a fixed 4.096 V output with ±0.05% tolerance, but it is not a direct pin-for-pin or functional replacement for the adjustable shunt TL431ACLPR. For a true second source, look for another manufacturer's TL431A-grade shunt reference in TO-92-3 with ±1% tolerance and 0°C to 70°C range — the function is identical.