LM140LAH-12/NOPB Equivalent & Substitute Parts

Part Overview

The LM140LAH-12/NOPB is a linear voltage regulator IC manufactured by Texas Instruments, designed for positive fixed output regulation at 12V with 100mA output current capacity. This through-hole component operates across an extended temperature range of -55°C to 125°C and features integrated over-temperature and short-circuit protection. The part is currently active in production status with full ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when electrical specifications, mechanical packaging, and regulatory compliance remain equivalent across the component family.

Substiute Parts

LM140LAH-12/NOPB

Texas InstrumentsIn Stock: 1468LM140LAH-12/NOPB Datasheet

Current PartRFQ

LM140LAH-12

Texas InstrumentsIn Stock: 1393LM140LAH-12 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM140LAH-12/NOPB is determined by strict equivalence across the following critical parameters:

• Fixed output voltage of 12V
• Output current rating of 100mA
• Maximum input voltage of 35V
• Dropout voltage specification of 2V @ 1A
• TO-39-3 Metal Can package configuration
• Through-hole mounting compatibility
• Operating temperature range of -55°C to 125°C
• Integrated over-temperature and short-circuit protection
• ROHS3 compliance and MSL 1 rating

The LM140LAH-12 variant meets all substitution criteria as it shares identical electrical specifications, package type, and regulatory certifications with the main part number.

Parameter Comparison

Engineering Selection Recommendations

Both the LM140LAH-12/NOPB and LM140LAH-12 are active production components from Texas Instruments with identical electrical and mechanical specifications. Selection between these part numbers is based on packaging designation and supplier inventory availability. Both variants maintain ROHS3 compliance and are suitable for applications requiring 12V fixed output regulation at 100mA with extended temperature operation. The TO-39-3 Metal Can package ensures thermal performance and mechanical robustness for through-hole PCB assembly. Current inventory levels support component procurement for production and replacement applications.

Frequently Asked Questions (FAQ)

Q: Can LM140LAH-12 be used as a direct replacement for LM140LAH-12/NOPB?

A: Yes. Both part numbers share identical electrical specifications, output voltage, current rating, package configuration, and regulatory compliance. The difference in part number designation reflects packaging or supplier coding conventions rather than functional differences.

Q: What determines compatibility between these regulator variants?

A: Compatibility is established through equivalence in fixed output voltage (12V), output current capacity (100mA), maximum input voltage (35V), dropout voltage (2V @ 1A), TO-39-3 package type, and operating temperature range (-55°C to 125°C).

Q: Are there any thermal or performance differences between these part numbers?

A: No. Both variants provide identical thermal performance, PSRR characteristics (72dB at 120Hz), quiescent current (3 mA), and protection features (over-temperature and short-circuit).

Q: What is the significance of the "/NOPB" suffix in the part number?

A: The "/NOPB" designation indicates packaging or supplier-specific coding. The electrical and mechanical specifications remain equivalent to the base LM140LAH-12 variant.

Q: Are both parts suitable for high-temperature applications?

A: Yes. Both variants operate across the full temperature range of -55°C to 125°C with consistent performance characteristics throughout this range.

Q: What PCB assembly considerations apply to the TO-39-3 package?

A: The TO-39-3 Metal Can package is a through-hole component requiring standard PCB drilling and wave soldering or manual soldering processes. Pin spacing and lead configuration are identical between both part variants.