TL431ACLPME3 Equivalent & Substitute Parts

Part Overview

The TL431ACLPME3 is a shunt voltage reference IC manufactured by Texas Instruments, designed for adjustable voltage regulation applications. This device features an adjustable output range from 2.495V to 36V with ±1% tolerance and supports output currents up to 100 mA in a TO-92-3 through-hole package. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	TL431ACLPME3
Manufacturer	Texas Instruments
Reference Type	Shunt
Output Type	Adjustable
Voltage - Output (Min/Fixed)	2.495V
Voltage - Output (Max)	36V
Current - Output	100 mA
Tolerance	±1%
Current - Cathode	600 µA
Operating Temperature	0°C ~ 70°C
Package / Case	TO-226-3, TO-92-3 (TO-226AA) Formed Leads
Mounting Type	Through Hole
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the TL431ACLPME3 is determined by the following critical parameters:

Core Electrical Parameters:

Reference type: Shunt voltage reference
Output type: Adjustable
Voltage output range: 2.495V to 36V minimum (2.5V acceptable for most applications)
Output current capability: 100 mA
Tolerance: ±1% or better
Package: TO-92-3 through-hole configuration

Substitution Categories:

Direct Replacement (MFR Recommended): TL431ACLPM - Identical electrical specifications, active product status, same manufacturer
Cross-Manufacturer Equivalents (Active Status): KA431AZTA (onsemi), TL431AIZ-AP (STMicroelectronics), TL431AIZT (STMicroelectronics) - Meet all core electrical parameters with extended operating temperature ranges
Enhanced Tolerance Alternatives: AS431AZTR-E1, AS431AZTR-G1, AS431BZTR-E1, AS431BZTR-G1, AS431IAZTR-G1, AZ431AZ-ATRE1 (Diodes Incorporated) - Meet or exceed electrical specifications with improved tolerance and temperature coefficients

Parameter Comparison

Parameter	TL431ACLPME3	TL431ACLPM	KA431AZTA	TL431AIZ-AP	TL431AIZT	AS431AZTR-E1	AS431BZTR-G1	AZ431AZ-ATRE1
Manufacturer	Texas Instruments	Texas Instruments	onsemi	STMicroelectronics	STMicroelectronics	Diodes Incorporated	Diodes Incorporated	Diodes Incorporated
Voltage - Output (Min)	2.495V	2.495V	2.495V	2.495V	2.495V	2.5V	2.5V	2.5V
Voltage - Output (Max)	36V	36V	36V	36V	36V	36V	36V	36V
Current - Output	100 mA	100 mA	100 mA	100 mA	100 mA	100 mA	100 mA	100 mA
Tolerance	±1%	±1%	±1%	±1%	±1%	±0.5%	±1%	±0.4%
Current - Cathode	600 µA	600 µA	1 mA	700 µA	700 µA	1 mA	1 mA	1 mA
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	-25°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Temperature Coefficient	Not specified	Not specified	50ppm/°C Typical	Not specified	Not specified	20ppm/°C Typical	20ppm/°C Typical	20ppm/°C Typical
Package / Case	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: TL431ACLPM (Texas Instruments)

Identical electrical and thermal specifications to the obsolete TL431ACLPME3
Active product status with high inventory availability (666,866 pcs)
Same manufacturer ensures design continuity
ROHS3 compliant

Secondary Recommendations for Extended Temperature Range Applications:

KA431AZTA (onsemi) - Suitable when operating temperature range of -25°C to 85°C is required, with specified temperature coefficient of 50ppm/°C

TL431AIZ-AP or TL431AIZT (STMicroelectronics) - Recommended for applications requiring -40°C to 105°C operating range with higher cathode current specification (700 µA)

Enhanced Tolerance Alternatives:

AS431AZTR-E1 or AS431AZTR-G1 (Diodes Incorporated) - Provides ±0.5% tolerance with 20ppm/°C temperature coefficient and -40°C to 125°C operating range for precision voltage reference applications

AS431BZTR-E1 or AS431BZTR-G1 (Diodes Incorporated) - Maintains ±1% tolerance with extended temperature range (-40°C to 125°C) and high inventory availability

AZ431AZ-ATRE1 (Diodes Incorporated) - Offers superior ±0.4% tolerance with 20ppm/°C temperature coefficient and -40°C to 125°C operating range, with highest inventory availability (1,300,100 pcs)

All recommended substitutes maintain ROHS3 compliance and are available in the same TO-92-3 through-hole package configuration.

Frequently Asked Questions (FAQ)

Q: Can I directly replace TL431ACLPME3 with TL431ACLPM? A: Yes. TL431ACLPM is the direct active equivalent with identical electrical specifications, same manufacturer, and compatible TO-92-3 package. This is the recommended first choice for replacement.

Q: What is the difference between ±1% and ±0.5% tolerance variants? A: Tolerance specifies the accuracy of the output voltage reference. ±0.5% tolerance (AS431AZTR-E1) provides tighter voltage accuracy than ±1% tolerance (TL431ACLPM). Selection depends on application precision requirements. For general-purpose voltage regulation, ±1% is typically sufficient.

Q: Why do some substitutes have different cathode current specifications? A: Cathode current (minimum operating current) varies by manufacturer design. The TL431ACLPME3 specifies 600 µA, while alternatives range from 50 µA to 1 mA. This affects circuit biasing requirements. Verify your application's bias network can accommodate the substitute's cathode current specification.

Q: Are all substitutes available in TO-92-3 package? A: Yes. All listed substitutes are available in TO-92-3 through-hole package configuration, ensuring mechanical and electrical compatibility with existing PCB designs.

Q: What is the significance of operating temperature range differences? A: The original TL431ACLPME3 operates from 0°C to 70°C. Substitutes with extended ranges (-40°C to 125°C) provide broader environmental compatibility without design changes. Select based on your application's actual operating temperature requirements.

Q: Can I use a substitute with better tolerance than the original design? A: Yes. Substitutes with improved tolerance (±0.4% or ±0.5%) are backward compatible and will not negatively impact designs specified for ±1% tolerance. They provide enhanced performance without circuit modification.

Q: What does ROHS3 compliance mean? A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead and other hazardous materials. All listed substitutes maintain ROHS3 compliance for regulatory consistency.

Q: How do I verify a substitute is compatible with my circuit? A: Confirm the substitute meets these minimum requirements: adjustable shunt reference type, 2.495V to 36V output range, 100 mA output current capability, ±1% or better tolerance, and TO-92-3 package. Verify your bias network accommodates the substitute's cathode current specification.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message