LM140LAH-12 Equivalent & Substitute Parts Reference

Part Overview

The LM140LAH-12 from Texas Instruments is a Power Management (PMIC) Linear Voltage Regulator IC designed to provide a positive fixed output of 12V at up to 100mA, housed in the TO-205AD (TO-39-3) Metal Can package. Its active status and robust operating temperature range (-55°C to 125°C) make it suitable for various industrial and high-reliability environments. Identifying alternative models is necessary for supply chain risk mitigation, ensuring ongoing production, supporting design re-use, and maintaining long-term maintenance cycles when the main part is out of stock or distribution changes.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM140LAH-12
Category	Power Management (PMIC)
Packaging	Bulk
Description	IC REG LINEAR 12V 100MA TO39-3
Voltage - Input (Max)	35V
Voltage - Output (Min/Fixed)	12V
Current - Output	100mA
Voltage Dropout (Max)	2V @ 1A
Number of Regulators	1
Output Configuration	Positive
Output Type	Fixed
Package / Case	TO-205AD, TO-39-3 Metal Can
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant
Operating Temperature	-55°C ~ 125°C
Protection Features	Over Temperature, Short Circuit

Substitute Part Grouping Explanation

Substitute and equivalent parts for LM140LAH-12 are determined strictly according to matching electrical parameters, mechanical package, operating temperature, output characteristics, protection features, and compliance certifications. The grouping utilizes these criteria:

Maximum input voltage
Fixed output voltage
Rated output current
Package type
Mounting method
Number of regulators
Protection features
Operating temperature range
Compliance certifications (RoHS, REACH)

Parameter Comparison

Parameter	LM140LAH-12	LM140LAH-12/NOPB
Manufacturer	Texas Instruments	Texas Instruments
Category	Power Management (PMIC)	Power Management (PMIC)
Packaging	Bulk	Bulk
Description	IC REG LINEAR 12V 100MA TO39-3	IC REG LINEAR 12V 100MA TO39-3
Voltage - Input (Max)	35V	35V
Voltage - Output (Min/Fixed)	12V	12V
Current - Output	100mA	100mA
Voltage Dropout (Max)	2V @ 1A	2V @ 1A
Number of Regulators	1	1
Output Configuration	Positive	Positive
Output Type	Fixed	Fixed
Package / Case	TO-205AD, TO-39-3 Metal Can	TO-205AD, TO-39-3 Metal Can
Mounting Type	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C
Protection Features	Over Temperature, Short Circuit	Over Temperature, Short Circuit

Engineering Selection Recommendations

When choosing between LM140LAH-12 and LM140LAH-12/NOPB, technical selection can be based on the fact that both parts have identical product status (Active), packaging, compliance (ROHS3, REACH Unaffected), and all regulatory characteristics. Both are from the same manufacturer, utilize the same mechanical case (TO-205AD, TO-39-3 Metal Can), and share all key electrical characteristics.

Frequently Asked Questions (FAQ)

Q1: What are the strict requirements for substituting the LM140LAH-12 Linear Voltage Regulator?
A1: The substitute must match the input voltage (35V max), fixed output voltage (12V), rated output current (100mA), pinout and package (TO-205AD, TO-39-3), mounting type (Through Hole), number of regulators (1), and must provide equivalent protection features and operating temperature range.

Q2: Does the LM140LAH-12/NOPB offer any advantage in compliance or inventory status?
A2: LM140LAH-12/NOPB is also ROHS3 Compliant and REACH Unaffected, with Active part status and similar inventory levels.

Q3: Are there mechanical differences between LM140LAH-12 and LM140LAH-12/NOPB?
A3: Both parts have identical mechanical specifications including package and mounting method.

Q4: Is there compatibility risk when interchanging LM140LAH-12 with LM140LAH-12/NOPB in existing designs?
A4: Both components are parametric equivalents regarding electrical performance, compliance, and mechanical fit, based strictly on the data provided.

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