TL431ACDBZRG4 Equivalent & Substitute Parts

Part Overview

The TL431ACDBZRG4 is a shunt voltage reference IC manufactured by Texas Instruments, designed for adjustable output voltage regulation in power management applications. This part operates with an adjustable output range of 2.495V to 36V, delivering up to 100 mA with ±1% tolerance. The device is packaged in SOT-23-3 (TO-236-3) surface mount configuration and is RoHS3 compliant.

The TL431ACDBZRG4 is currently discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components that maintain functional compatibility while meeting application requirements. Substitute parts are selected based on matching electrical specifications, package compatibility, and operational parameters.

Key Parameters

Parameter	Value
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-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts are grouped into three categories based on substitution relationship and electrical characteristics:

Direct Equivalents (Same Manufacturer - Texas Instruments)

TL431ACDBZR: Identical electrical specifications and package, active product status, higher inventory availability
TL431AIDBZR,215: Extended operating temperature range (-40°C ~ 85°C), manufactured by Nexperia USA Inc.
TL431AQDBZR,215: Extended operating temperature range (-40°C ~ 125°C) with automotive qualification (AEC-Q100), manufactured by Nexperia USA Inc.

Cross-Manufacturer Equivalents (Diodes Incorporated - AN431 Series)

AN431AN-ATRE1 / AN431AN-ATRG1: ±0.5% tolerance (tighter than original), 2.5V minimum output, 1 mA cathode current, -40°C ~ 125°C operating range
AN431BN-ATRE1 / AN431BN-ATRG1: ±1% tolerance (matches original), 2.5V minimum output, 1 mA cathode current, -40°C ~ 125°C operating range

Premium Cross-Manufacturer Equivalents (Diodes Incorporated - AZ431 Series)

AZ431AN-ATRE1: ±0.4% tolerance (superior accuracy), 2.5V minimum output, 1 mA cathode current, -40°C ~ 125°C operating range
AZ431BN-ATRE1: ±0.8% tolerance, 2.5V minimum output, 1 mA cathode current, -40°C ~ 125°C operating range

All substitute parts maintain SOT-23-3 package compatibility, 100 mA output current capability, and 36V maximum output voltage. Substitution is determined by tolerance requirements, operating temperature range, cathode current specifications, and product availability.

Parameter Comparison

Part Number	Manufacturer	Voltage Output (Min)	Voltage Output (Max)	Current Output	Tolerance	Cathode Current	Operating Temp	Package	Product Status	Inventory
TL431ACDBZRG4	Texas Instruments	2.495V	36V	100 mA	±1%	600 µA	0°C ~ 70°C	SOT-23-3	Discontinued	9200 Pcs
TL431ACDBZR	Texas Instruments	2.495V	36V	100 mA	±1%	600 µA	0°C ~ 70°C	SOT-23-3	Active	77200 Pcs
TL431ACDBZR,215	Nexperia USA Inc.	2.495V	36V	100 mA	±1%	600 µA	0°C ~ 70°C	SOT-23-3	Active	9103 Pcs
TL431AIDBZR,215	Nexperia USA Inc.	2.495V	36V	100 mA	±1%	600 µA	-40°C ~ 85°C	SOT-23-3	Active	56938 Pcs
TL431AQDBZR,215	Nexperia USA Inc.	2.495V	36V	100 mA	±1%	600 µA	-40°C ~ 125°C	SOT-23-3	Active	4084 Pcs
AN431AN-ATRE1	Diodes Incorporated	2.5V	36V	100 mA	±0.5%	1 mA	-40°C ~ 125°C	SOT-23-3	Active	180200 Pcs
AN431AN-ATRG1	Diodes Incorporated	2.5V	36V	100 mA	±0.5%	1 mA	-40°C ~ 125°C	SOT-23-3	Active	117380 Pcs
AN431BN-ATRE1	Diodes Incorporated	2.5V	36V	100 mA	±1%	1 mA	-40°C ~ 125°C	SOT-23-3	Active	24200 Pcs
AN431BN-ATRG1	Diodes Incorporated	2.5V	36V	100 mA	±1%	1 mA	-40°C ~ 125°C	SOT-23-3	Active	93300 Pcs
AZ431AN-ATRE1	Diodes Incorporated	2.5V	36V	100 mA	±0.4%	1 mA	-40°C ~ 125°C	SOT-23-3	Active	9425400 Pcs
AZ431BN-ATRE1	Diodes Incorporated	2.5V	36V	100 mA	±0.8%	1 mA	-40°C ~ 125°C	SOT-23-3	Active	727619 Pcs

Engineering Selection Recommendations

Primary Substitute (Identical Specifications) TL431ACDBZR from Texas Instruments is the direct equivalent with identical electrical specifications, tolerance, and operating temperature range. This part maintains full compatibility with the discontinued TL431ACDBZRG4 and is currently in active production with substantial inventory availability.

Extended Temperature Range Substitutes TL431AIDBZR,215 and TL431AQDBZR,215 from Nexperia USA Inc. provide extended operating temperature ranges (-40°C ~ 85°C and -40°C ~ 125°C respectively) while maintaining all other electrical parameters. TL431AQDBZR,215 includes automotive qualification (AEC-Q100) for applications requiring extended temperature operation and automotive-grade reliability.

Cross-Manufacturer Substitutes (Diodes Incorporated) AN431BN-ATRE1 and AN431BN-ATRG1 provide ±1% tolerance matching the original specification with extended operating temperature range (-40°C ~ 125°C). These parts feature 1 mA cathode current versus the original 600 µA and 2.5V minimum output versus 2.495V. Both are RoHS3 compliant and actively produced.

Premium Accuracy Substitutes AZ431AN-ATRE1 offers ±0.4% tolerance for applications requiring superior voltage reference accuracy. AZ431BN-ATRE1 provides ±0.8% tolerance. Both maintain 100 mA output current, 36V maximum output, and extended operating temperature range (-40°C ~ 125°C). These parts feature significantly higher inventory availability.

All substitute parts are RoHS3 compliant, REACH unaffected, and maintain SOT-23-3 package compatibility for direct PCB footprint substitution.

Frequently Asked Questions (FAQ)

Q: Can TL431ACDBZR directly replace TL431ACDBZRG4? A: Yes. TL431ACDBZR is the direct equivalent with identical electrical specifications, tolerance (±1%), output voltage range (2.495V to 36V), output current (100 mA), and operating temperature range (0°C ~ 70°C). Both use SOT-23-3 packaging and are RoHS3 compliant.

Q: What is the difference between TL431ACDBZR and AN431BN-ATRG1? A: Both parts maintain ±1% tolerance and 100 mA output current. Key differences are: AN431BN-ATRG1 has extended operating temperature (-40°C ~ 125°C versus 0°C ~ 70°C), minimum output voltage of 2.5V versus 2.495V, and cathode current of 1 mA versus 600 µA. AN431BN-ATRG1 is manufactured by Diodes Incorporated rather than Texas Instruments.

Q: Which substitute offers the best voltage reference accuracy? A: AZ431AN-ATRE1 provides ±0.4% tolerance, superior to the original ±1% specification. This part is suitable for applications requiring tighter voltage regulation and is available in high volume.

Q: Are all substitute parts available in the same package? A: Yes. All listed substitute parts use SOT-23-3 (TO-236-3, SC-59) surface mount packaging, enabling direct PCB footprint compatibility without layout modifications.

Q: What is the significance of the cathode current difference between TL431ACDBZRG4 and Diodes Incorporated substitutes? A: The original part specifies 600 µA cathode current, while Diodes Incorporated AN431 and AZ431 series specify 1 mA. This difference affects circuit biasing requirements. Applications designed for 600 µA operation should verify compatibility with 1 mA cathode current specifications before substitution.

Q: Which substitute is recommended for automotive applications? A: TL431AQDBZR,215 is qualified to AEC-Q100 automotive standards with extended operating temperature range (-40°C ~ 125°C). This part is suitable for automotive-grade power management circuits requiring extended temperature operation and reliability certification.

Q: Can I use AN431AN-ATRE1 in place of TL431ACDBZRG4? A: AN431AN-ATRE1 is functionally compatible with superior ±0.5% tolerance and extended operating temperature (-40°C ~ 125°C). However, it features 1 mA cathode current versus 600 µA and 2.5V minimum output versus 2.495V. Circuit design must accommodate these parameter differences.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message