LM137H Equivalent & Substitute Parts

Part Overview

The LM137H is a linear voltage regulator IC designed for negative adjustable output applications. It delivers 1.5A output current in a TO-3 package and is classified as an active product from Texas Instruments. This component is essential in power management circuits requiring negative voltage regulation with adjustable output levels. Alternative part numbers and equivalent devices are identified to support procurement flexibility and supply chain continuity.

Substiute Parts

LM137H

Texas InstrumentsIn Stock: 3081LM137H Datasheet

Current PartRFQ

LM137H/NOPB

Texas InstrumentsIn Stock: 3123LM137H/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM137H is determined by strict equivalence across the following critical parameters:

• Output Configuration: Negative
• Output Type: Adjustable
• Current - Output: 1.5A
• Voltage - Input (Max): -40V
• Voltage - Output Range: -1.2V to -37V
• Package / Case: TO-205AD, TO-39-3 Metal Can
• Mounting Type: Through Hole
• Protection Features: Over Current, Over Temperature, Short Circuit

The LM137H/NOPB is identified as a parametric equivalent. Both devices share identical electrical specifications, output characteristics, thermal performance, and physical packaging. The "/NOPB" suffix indicates lead-free plating compliance and does not alter functional or electrical parameters.

Parameter Comparison

Engineering Selection Recommendations

Both LM137H and LM137H/NOPB are active products from Texas Instruments with ROHS3 compliance and REACH unaffected status. Selection between these devices should be based on procurement requirements and supply chain availability. The LM137H/NOPB variant incorporates lead-free plating and is suitable for applications requiring compliance with lead-free manufacturing standards. Both devices maintain identical electrical performance and thermal characteristics across the specified operating temperature range of -55°C to 150°C.

Frequently Asked Questions (FAQ)

Q: What is the difference between LM137H and LM137H/NOPB?

A: The LM137H/NOPB designation indicates lead-free plating (NOPB = No Plumbum). Both devices are electrically and functionally identical with matching output specifications, current ratings, and protection features. The difference is in the lead finish only.

Q: Can LM137H/NOPB be used as a direct replacement for LM137H?

A: Yes. The LM137H/NOPB is a direct parametric equivalent with identical electrical characteristics, output configuration, current rating, voltage specifications, and package type. Pin configuration and mounting requirements are unchanged.

Q: What package types are available for the LM137H?

A: The LM137H is supplied in TO-205AD and TO-39-3 Metal Can packages, both through-hole mounting types. The TO-3 designation refers to the supplier device package classification.

Q: Are there any compliance or certification differences between these parts?

A: Both LM137H and LM137H/NOPB are ROHS3 compliant and REACH unaffected. Moisture sensitivity level is rated at MSL 1 (Unlimited) for both devices.

Q: What protection features are included in the LM137H?

A: The LM137H includes over-current protection, over-temperature protection, and short-circuit protection to ensure reliable operation under fault conditions.