LM140LAH-15 Equivalent & Substitute Parts

Part Overview

The LM140LAH-15 is a linear voltage regulator IC from Texas Instruments designed for positive fixed output applications. This through-hole component delivers 100mA at a fixed 15V output and operates across an extended temperature range of -55°C to 125°C. The device is classified as Active product status with full RoHS3 compliance and REACH unaffected designation. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required for design flexibility, inventory management, or supply chain continuity.

Substiute Parts

LM140LAH-15

Texas InstrumentsIn Stock: 1474LM140LAH-15 Datasheet

Current PartRFQ

LM140LAH-15

National SemiconductorIn Stock: 1546LM140LAH-15 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM140LAH-15 are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Output voltage: 15V fixed
• Output current capability: 100mA minimum
• Input voltage rating: 35V maximum
• Voltage dropout: 2V @ 1A maximum
• Package type: TO-39-3 Metal Can (TO-205AD equivalent)
• Mounting configuration: Through Hole
• Operating temperature range: -55°C to 125°C
• Protection features: Over Temperature and Short Circuit protection

Parts meeting all these parameters are classified as parametric equivalents and may be substituted in applications where the LM140LAH-15 is specified.

Parameter Comparison

Engineering Selection Recommendations

Both the Texas Instruments LM140LAH-15 and the National Semiconductor LM140LAH-15 are Active product status components with identical electrical specifications and mechanical packaging. Selection between these parts may be based on:

• Inventory availability and supply chain logistics
• Manufacturer preference or qualification requirements
• Regional sourcing considerations
• Compliance documentation requirements (both are ROHS3 compliant and REACH unaffected)

No technical performance differentiation exists between these parametric equivalents based on the provided specifications.

Frequently Asked Questions (FAQ)

Q: Can the National Semiconductor LM140LAH-15 be used as a direct replacement for the Texas Instruments LM140LAH-15?

A: Yes. Both parts are parametric equivalents with identical electrical characteristics, output voltage, current rating, temperature range, and TO-39-3 Metal Can packaging. Direct substitution is supported for applications where the LM140LAH-15 specification is called out.

Q: Are there any package compatibility considerations when substituting between these parts?

A: No. Both parts use the TO-205AD / TO-39-3 Metal Can package with through-hole mounting. PCB layout and thermal management requirements remain unchanged.

Q: What are the key parameters that must match for substitution eligibility?

A: Critical parameters include 15V fixed output voltage, 100mA output current, 35V maximum input voltage, 2V maximum dropout voltage, -55°C to 125°C operating temperature range, and TO-39-3 Metal Can package type.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the Texas Instruments and National Semiconductor versions are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8542.39.0001.

Q: What protection features are included in these regulators?

A: Both parts include over temperature protection and short circuit protection to ensure safe operation under fault conditions.