TL431LP-BP Equivalent & Substitute Parts

Part Overview

The TL431LP-BP is a shunt voltage reference IC manufactured by Micro Commercial Co, designed for precision voltage regulation applications requiring programmable output between 2.5V and 36V at 100mA output current. This component operates in the through-hole TO-92 package format and is classified as obsolete, making identification of active equivalent parts essential for ongoing production and maintenance applications.

The obsolete status of the TL431LP-BP necessitates sourcing of functionally equivalent alternatives that maintain electrical and mechanical compatibility while offering active product status and improved availability.

Substiute Parts

TL431LP-BP

Micro Commercial CoIn Stock: 719TL431LP-BP Datasheet

Current PartRFQ

TL431CLPRAG

onsemiIn Stock: 2509TL431CLPRAG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TL431LP-BP is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Requirements:

• Reference type must be shunt configuration
• Output voltage range must encompass or match 2.5V to 36V specification
• Output current capability must be 100mA minimum
• Cathode current must be 1mA
• Input voltage range must support 2.44V to 37V operation

Mechanical Compatibility Requirements:

• Package format must be TO-92-3 (TO-226-3) through-hole configuration
• Lead formation and body dimensions must be compatible with existing PCB layouts

Compliance Requirements:

• RoHS compliance status must be maintained
• ECCN and HTSUS classifications must align

The TL431CLPRAG from onsemi meets all electrical and mechanical substitution criteria while offering active product status and improved inventory availability.

Parameter Comparison

Engineering Selection Recommendations

The TL431CLPRAG from onsemi is the primary substitute for the obsolete TL431LP-BP based on the following engineering criteria:

Product Status Alignment: The TL431CLPRAG maintains active product status with 2450 units in current inventory, eliminating supply chain risk associated with the obsolete TL431LP-BP.

Electrical Equivalence: Both components operate as shunt voltage references with identical output current (100mA), cathode current (1mA), and maximum voltage rating (36V). The TL431CLPRAG minimum output voltage of 2.495V is functionally equivalent to the 2.5V specification of the main part within standard engineering tolerances.

Mechanical Compatibility: Both components utilize the TO-92-3 through-hole package format with compatible lead configurations, enabling direct PCB layout substitution without redesign.

Compliance Certification: The TL431CLPRAG maintains RoHS3 compliance and shares identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications, ensuring regulatory and export compliance equivalence.

Performance Enhancement: The TL431CLPRAG provides specified tolerance (±2.2%) and temperature coefficient (50ppm/°C Typical), offering improved performance documentation compared to the unspecified parameters of the obsolete part.

Frequently Asked Questions (FAQ)

Q: Can the TL431CLPRAG be used as a direct replacement for the TL431LP-BP without circuit modification?

A: Yes. Both components share identical output current (100mA), cathode current (1mA), maximum voltage rating (36V), and TO-92-3 package configuration. The minimum output voltage difference (2.495V vs 2.5V) is within standard engineering tolerance for shunt reference applications.

Q: What is the difference between "Programmable" and "Adjustable" output types?

A: Both designations refer to voltage reference ICs with user-configurable output voltage through external resistor networks. The terminology difference reflects manufacturer documentation conventions rather than functional distinction. Both the TL431LP-BP and TL431CLPRAG support external programming of output voltage within their specified ranges.

Q: Are the lead formations identical between the two parts?

A: Both components use TO-92-3 package format with through-hole leads. The TL431CLPRAG specifies "Long Body (Formed Leads)" in the package description, indicating standard TO-92 lead geometry. Existing PCB layouts designed for the TL431LP-BP accommodate this configuration without modification.

Q: Does the ±2.2% tolerance of the TL431CLPRAG affect circuit performance?

A: The specified tolerance of the TL431CLPRAG provides improved performance documentation. For applications where the TL431LP-BP operated without specified tolerance limits, the TL431CLPRAG tolerance specification represents enhanced precision and predictability rather than a functional limitation.

Q: What is the significance of the 50ppm/°C temperature coefficient?

A: The temperature coefficient specification of the TL431CLPRAG indicates output voltage drift of 50 parts per million per degree Celsius across the 0°C to 70°C operating range. This specification was not provided for the obsolete TL431LP-BP, but represents typical performance for this component class and does not preclude substitution in existing applications.

Q: Are there any inventory or lead time advantages to using the TL431CLPRAG?

A: The TL431CLPRAG maintains active product status with 2450 units in current inventory, compared to the obsolete status of the TL431LP-BP with 677 units remaining. This inventory position ensures long-term supply availability and standard lead times for new production requirements.