LM35DT Temperature Sensor - Equivalent & Substitute Parts

Part Overview

The LM35DT is an analog temperature sensor manufactured by Texas Instruments, designed for local temperature measurement applications within the 0°C to 100°C range. It operates on a 10mV/°C output characteristic and is housed in a TO-220-3 through-hole package. The LM35DT is currently classified as "Not For New Designs," indicating it has been superseded in the product lifecycle. Finding equivalent substitute parts is necessary for ongoing maintenance, repair, and legacy system support where this sensor type is specified.

Substiute Parts

LM35DT

Texas InstrumentsIn Stock: 1846LM35DT Datasheet

Current PartRFQ

LM35DT/NOPB

Texas InstrumentsIn Stock: 38927LM35DT/NOPB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM35DT is determined by strict equivalence across the following critical parameters:

• Sensor Type & Output Characteristic: Analog, local temperature sensing with 10mV/°C output
• Temperature Range: 0°C ~ 100°C sensing capability
• Electrical Specifications: 4V ~ 30V supply voltage, ±1.5°C accuracy at 25°C test condition
• Package Compatibility: TO-220-3 through-hole package for direct board-level replacement
• Base Product Number: LM35 series designation

The LM35DT/NOPB qualifies as a direct substitute based on identical electrical and mechanical parameters. The primary distinction is product lifecycle status and compliance certification, not functional capability.

Parameter Comparison

Engineering Selection Recommendations

The LM35DT/NOPB is the direct functional equivalent of the LM35DT. Both parts maintain identical electrical performance and mechanical compatibility. The LM35DT/NOPB is preferred for new procurement due to its Active product status and ROHS3 compliance certification. The LM35DT remains suitable for replacement applications in legacy systems where the original part number is specified, provided RoHS non-compliance is acceptable within the application context.

Frequently Asked Questions (FAQ)

Q: Can the LM35DT/NOPB be used as a direct replacement for the LM35DT?

A: Yes. Both parts are electrically and mechanically identical. They share the same TO-220-3 package, 10mV/°C output characteristic, 0°C ~ 100°C temperature range, and ±1.5°C accuracy specification. Pin-for-pin substitution is valid.

Q: What is the difference between LM35DT and LM35DT/NOPB?

A: The primary differences are product lifecycle status and compliance certification. The LM35DT/NOPB is classified as Active and carries ROHS3 compliance, while the LM35DT is Not For New Designs and RoHS non-compliant. Functional performance is identical.

Q: Are there any package or pinout differences?

A: No. Both parts use the TO-220-3 through-hole package with identical pin configuration and mechanical dimensions. Board-level replacement requires no layout modifications.

Q: Which part should be selected for new designs?

A: The LM35DT/NOPB should be selected for new designs due to its Active product status and regulatory compliance certifications.

Q: Can these sensors be used interchangeably in existing applications?

A: Yes, within the constraints of the application's compliance requirements. The LM35DT/NOPB is functionally equivalent and can replace the LM35DT in any circuit designed for the original part.