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Texas Instruments LM431ACM3/NOPB — Discrete Semiconductors
Texas Instruments

LM431ACM3/NOPB Adjustable Shunt Reference, 2.495V–37V

MPNLM431ACM3/NOPB
End of Life

Texas Instruments LM431ACM3/NOPB adjustable shunt voltage reference, ±2.2% tolerance, 100 mA output, 2.495V–37 V, 50 ppm/°C, SOT-23-3, 0°C–70°C.

$1.27Ref. price · indicative, final on quote
LM431ACM3/NOPB datasheet
PackagingTO-236-3, SC-59, SOT-23-3
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

LM431ACM3/NOPB Technical Specifications
ParameterValue
Output typeAdjustable
Mounting typeSurface Mount
Reference typeShunt
Voltage - output37 V
Voltage - output (Min (Fixed))2.495V
Current - output100 mA
Current - cathode1 mA
Operating temperature0°C ~ 70°C (TA)
PackageTape & Reel (TR); Cut Tape (CT)
Tolerance±2.2%
CaseTO-236-3, SC-59, SOT-23-3
Temperature coefficient50ppm/°C Typical

Product details

Shunt reference for the BOM — what the ratings mean

The LM431ACM3/NOPB is a three-terminal adjustable shunt voltage reference from Texas Instruments. It sets a stable voltage between 2.495 V (min) and 37 V (max) using two external resistors. Output current is rated to 100 mA, and the minimum cathode current for regulation is 1 mA — the load and bias budget for the shunt leg.

Lifecycle and compliance — no LTB risk

Texas Instruments lists the LM431ACM3/NOPB as Active. It is ROHS3 compliant. For a BOM line that needs a commercial-temperature adjustable shunt reference in SOT-23-3, this part is current-production and can be specified into new designs without near-term obsolescence concern.

Frequently asked questions

Can LM431ACM3/NOPB replace TL431?

Yes — the LM431ACM3/NOPB is functionally equivalent to the industry-standard TL431 adjustable shunt reference. It shares the same three-terminal topology, 2.495 V reference, and adjustable output to 37 V. The ±2.2% tolerance and 50 ppm/°C drift are within the typical TL431 datasheet range. Verify the SOT-23-3 pinout matches your board layout before committing the BOM.