LM237KCE3 Equivalent & Substitute Parts

Part Overview

The LM237KCE3 is a linear voltage regulator IC designed for negative adjustable output applications. This device delivers 1.5A output current in a TO-220-3 package and is classified as obsolete. Due to its obsolete status and limited availability through standard distribution channels, identifying functionally equivalent substitute parts is essential for design continuity and production planning. The LM237KCSE3 serves as the manufacturer-recommended alternative, offering identical electrical performance with improved compliance status.

Substiute Parts

LM237KCE3

Texas InstrumentsIn Stock: 1187LM237KCE3 Datasheet

Current PartRFQ

LM237KCSE3

Texas InstrumentsIn Stock: 1906LM237KCSE3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM237KCE3 is determined by strict equivalence across the following critical parameters:

• Output configuration (negative polarity)
• Output type (adjustable regulation)
• Voltage specifications (input maximum -40V, output range -1.2V to -37V)
• Current rating (1.5A)
• Package form factor (TO-220-3)
• Thermal and protection characteristics (77dB PSRR, over-current and over-temperature protection)

The LM237KCSE3 meets all these criteria and is designated as the manufacturer-recommended substitute. Both parts share identical electrical performance and mechanical compatibility, with the primary distinction being product status and regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The LM237KCSE3 is the direct substitute for the LM237KCE3 based on Texas Instruments manufacturer designation. Selection between these parts should be driven by:

Product Status: The LM237KCE3 is obsolete with no ongoing production. The LM237KCSE3 carries Last Time Buy status, indicating limited future availability. For new designs or production continuity, the LM237KCSE3 is the appropriate choice.

Regulatory Compliance: The LM237KCSE3 achieves ROHS3 compliance, whereas the LM237KCE3 is non-compliant. For applications subject to RoHS directives or customer requirements mandating RoHS compliance, the LM237KCSE3 is mandatory.

Electrical Equivalence: Both parts deliver identical electrical performance across all specified parameters, ensuring direct functional substitution without circuit redesign.

Packaging and Mounting: Both parts use TO-220-3 through-hole packaging, permitting direct PCB footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can the LM237KCSE3 replace the LM237KCE3 in existing designs?

A: Yes. The LM237KCSE3 is electrically and mechanically equivalent to the LM237KCE3. No circuit modifications or PCB redesign are required. Both parts deliver identical voltage regulation, current capacity, and thermal performance.

Q: What is the primary reason to transition from LM237KCE3 to LM237KCSE3?

A: The LM237KCE3 is obsolete and no longer manufactured. The LM237KCSE3 is the manufacturer-recommended substitute with continued (though limited) availability and improved regulatory compliance.

Q: Are there differences in package form factor between these parts?

A: No. Both the LM237KCE3 and LM237KCSE3 use the TO-220-3 package with identical pin configuration and through-hole mounting. Direct PCB substitution is possible without layout changes.

Q: Does the LM237KCSE3 meet RoHS requirements?

A: Yes. The LM237KCSE3 is ROHS3 compliant. The LM237KCE3 is not RoHS compliant. For applications requiring RoHS certification, the LM237KCSE3 is the appropriate selection.

Q: Are the electrical specifications identical between these parts?

A: Yes. Both parts specify -40V maximum input voltage, -1.2V to -37V adjustable output range, 1.5A output current, 77dB PSRR at 120Hz, and identical protection features. Operating temperature range is -25°C to 150°C for both.

Q: What is the inventory status of these parts?

A: The LM237KCE3 has 1131 pieces in stock as new original inventory. The LM237KCSE3 has 1839 pieces available. Given the obsolete status of the LM237KCE3, the LM237KCSE3 represents the more reliable long-term sourcing option.