All Alternatives

Alternatives to Texas Instruments LM340T-15/NOPB

Texas Instruments LM340T-15/NOPB and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.

LM340T-15/NOPB compared against its qualified second sources
LM340T-15/NOPBTexas InstrumentsUA7815CKCSTexas InstrumentsL7815CVSTMicroelectronics+1more
FFF CompatibilityIdentical TO-220-3 pin configuration with Input on Pin 1, Ground on Pin 2, and Output on Pin 3.Uses the same physical TO-220-3 through-hole package dimensions.Slightly lower maximum input voltage rating of 30 V compared to the original's 35 V rating.Standard TO-220-3 pinout mapping with Pin 1 as Input, Pin 2 as Ground, and Pin 3 as Output.Standard TO-220 through-hole package matches the mechanical footprint exactly.Ripple rejection (PSRR) is lower at 54 dB compared to the original 80 dB.
AI Summary

LM340T-15/NOPB by Texas Instruments: Linear Voltage Regulator IC Positive Fixed 1 Output 1.5A TO-220-3.

The UA7815CKCS is Texas Instruments' recommended direct replacement for the LM340T-15. It shares the same 1.5 A current rating, TO-220 package, and high-quality ripple rejection, though its absolute maximum input voltage is slightly lower at 30 V.

  • Directly recommended by the manufacturer as a substitute
  • Very high PSRR of 78 dB (120Hz) closely matches the original's 80 dB rating
  • Same 1.5 A current capability and package footprint
  • Maximum input voltage is limited to 30 V instead of 35 V

The L7815CV from STMicroelectronics provides an excellent alternative that retains the full 35 V input ceiling and 1.5 A current capacity. However, its ripple rejection is significantly lower at 54 dB compared to the LM340T's 80 dB.

  • Matches the original maximum input voltage limit of 35 V
  • Standard industry-alternative from STMicroelectronics
  • Provides the full 1.5 A output current capability
  • Lower PSRR of 54 dB vs 80 dB on the original part
Lifecycle StatusActiveActiveActive
Market AvailabilityIn stockIn stockIn stock
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DescriptionLinear Voltage Regulator IC Positive Fixed 1 Output 1.5A TO-220-3Linear Voltage Regulator IC Positive Fixed 1 Output 1.5A TO-220-3Linear Voltage Regulator IC Positive Fixed 1 Output 1.5A TO-220
ManufacturerTexas InstrumentsTexas InstrumentsSTMicroelectronics
TypePower Management (PMIC)Power Management (PMIC)Power Management (PMIC)
DatasheetOpenOpenOpen
Lead Time26 weeks16 weeks30 weeks
Country of OriginMY--
Export Control Class NumberEAR99EAR99EAR99
HTSUS Code8542.39.0090--
Moisture Sensitivity Level1 (Unlimited)--
PSRR80dB (120Hz)--
Output TypeFixed--
Mounting TypeThrough Hole--
Package / CaseTO-220-3--
Current - Output1.5A--
Protection FeaturesOver Temperature, Short Circuit--
Number of Regulators1--
Output ConfigurationPositive--

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Frequently asked questions

Yes. The Texas Instruments LM340T-15/NOPB is active and in production. The parts listed here are qualified equivalents if you need a second source or better availability.

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