TL432CDBZR Equivalent & Substitute Parts

Part Overview

The TL432CDBZR is an adjustable shunt voltage reference IC manufactured by Texas Instruments, designed for power management applications requiring precision voltage regulation. This Surface Mount device operates across 0°C to 70°C and delivers 100 mA output current with ±2.2% tolerance. The part is Active status and ROHS3 compliant, making it suitable for modern electronic designs. Equivalent and substitute parts are identified to address supply chain flexibility, extended operating temperature ranges, improved tolerance specifications, or alternative packaging requirements while maintaining functional compatibility within the SOT-23-3 package family.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	TL432CDBZR
Reference Type	Shunt
Output Type	Adjustable
Voltage Output (Min/Fixed)	2.495V
Voltage Output (Max)	36V
Current Output	100 mA
Tolerance	±2.2%
Current Cathode	1 mA
Operating Temperature	0°C ~ 70°C
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Reference Type: Shunt (all substitutes maintain this classification)
Output Type: Adjustable (all substitutes provide adjustable output)
Voltage Output Range: 2.495V to 2.5V minimum, 36V maximum (all substitutes meet or exceed this range)
Current Output: 100 mA (all substitutes deliver this specification)
Current Cathode: 1 mA nominal (substitutes range from 50 µA to 1 mA, all acceptable)
Package / Case: TO-236-3, SC-59, SOT-23-3 (all substitutes use identical package)
Mounting Type: Surface Mount (all substitutes are surface mount)
RoHS Status: ROHS3 Compliant (all substitutes maintain compliance)

Substitutes are grouped by tolerance specification and operating temperature range. Parts with improved tolerance (±0.4% to ±1%) and extended temperature ranges (-40°C to 125°C) provide enhanced performance margins. Parts with identical or relaxed tolerance and standard temperature ranges provide direct functional equivalence.

Parameter Comparison

Part Number	Manufacturer	Tolerance	Voltage Output (Min)	Voltage Output (Max)	Current Output	Operating Temperature	Current Cathode	Package
TL432CDBZR	Texas Instruments	±2.2%	2.495V	36V	100 mA	0°C ~ 70°C	1 mA	SOT-23-3
TL431FDT,215	Nexperia USA Inc.	±2%	2.495V	36V	100 mA	-40°C ~ 125°C	1 mA	TO-236AB
AS431ANTR-E1	Diodes Incorporated	±0.5%	2.5V	36V	100 mA	-40°C ~ 125°C	1 mA	SOT-23-3
AS431ANTR-G1	Diodes Incorporated	±0.5%	2.5V	36V	100 mA	-40°C ~ 125°C	1 mA	SOT-23-3
AS431BNTR-G1	Diodes Incorporated	±1%	2.5V	36V	100 mA	-40°C ~ 125°C	1 mA	SOT-23-3
AS431HBNTR-G1	Diodes Incorporated	±1%	2.495V	36V	100 mA	-40°C ~ 125°C	500 µA	SOT-23-3
AS431IANTR-G1	Diodes Incorporated	±0.5%	2.5V	36V	100 mA	-40°C ~ 125°C	50 µA	SOT-23-3
AS431IBNTR-G1	Diodes Incorporated	±1%	2.5V	36V	100 mA	-40°C ~ 125°C	50 µA	SOT-23-3
AZ431AN-ATRG1	Diodes Incorporated	±0.4%	2.5V	36V	100 mA	-40°C ~ 125°C	1 mA	SOT-23-3
LM431SACM32X	Fairchild Semiconductor	±2%	2.5V	36V	100 mA	-25°C ~ 85°C	1 mA	SOT-23-3
LM431SBCM32X	onsemi	±1%	2.495V	36V	100 mA	-25°C ~ 85°C	1 mA	SOT-23-3

Engineering Selection Recommendations

Direct Functional Equivalents (±2% Tolerance, Extended Temperature): TL431FDT,215 (Nexperia) provides tolerance improvement from ±2.2% to ±2% with extended operating range (-40°C to 125°C). This part maintains identical voltage output specifications and current ratings while offering superior temperature performance. ROHS3 compliant with Automotive grade qualification (AEC-Q100).

Improved Tolerance Substitutes (±0.5% to ±1%): AS431ANTR-E1, AS431ANTR-G1, AS431BNTR-G1, AS431IANTR-G1, and AS431IBNTR-G1 (Diodes Incorporated) deliver tighter tolerance specifications ranging from ±0.5% to ±1%, with extended operating temperature (-40°C to 125°C). These parts are suitable for applications requiring improved voltage regulation accuracy. MSL rating of 3 (168 Hours) applies to most variants.

Premium Tolerance Substitute (±0.4%): AZ431AN-ATRG1 (Diodes Incorporated) offers the tightest tolerance at ±0.4% with extended temperature range (-40°C to 125°C). This part is appropriate for precision voltage reference applications. ROHS3 compliant with MSL rating of 3 (168 Hours).

Standard Temperature Range Alternatives: LM431SACM32X (Fairchild Semiconductor) and LM431SBCM32X (onsemi) provide ±2% and ±1% tolerance respectively, with operating range of -25°C to 85°C. These parts are suitable for applications with moderate temperature requirements. Both are ROHS3 compliant.

All substitute parts maintain Active product status and ROHS3 compliance. Selection should be based on application requirements for tolerance specification, operating temperature range, and supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can TL431FDT,215 replace TL432CDBZR directly? A: Yes. Both parts maintain identical voltage output range (2.495V to 36V), 100 mA current output, and SOT-23-3 package. TL431FDT,215 improves tolerance from ±2.2% to ±2% and extends operating temperature from 0°C–70°C to -40°C–125°C.

Q: What is the difference between AS431ANTR-G1 and AS431BNTR-G1? A: Both use SOT-23-3 package and support -40°C to 125°C operation. AS431ANTR-G1 provides ±0.5% tolerance, while AS431BNTR-G1 provides ±1% tolerance. Selection depends on required voltage regulation accuracy.

Q: Are all substitute parts in the same package? A: All listed substitutes use TO-236-3, SC-59, or SOT-23-3 package designations, which are mechanically and electrically equivalent. TL431FDT,215 specifies TO-236AB, which is functionally identical to SOT-23-3.

Q: What is the significance of Current Cathode specifications? A: Current Cathode values (ranging from 50 µA to 1 mA) represent the minimum operating current. Lower values (50 µA) reduce power consumption in low-current applications. All values are acceptable for standard shunt reference operation.

Q: Which substitute offers the best tolerance specification? A: AZ431AN-ATRG1 provides the tightest tolerance at ±0.4%, suitable for precision voltage reference applications requiring maximum accuracy.

Q: Can I use LM431SBCM32X in applications requiring -40°C operation? A: No. LM431SBCM32X operates from -25°C to 85°C. For extended low-temperature operation, select parts with -40°C minimum rating such as AS431 series or AZ431AN-ATRG1.

Q: Are all parts ROHS3 compliant? A: Yes. All listed parts maintain ROHS3 compliance and REACH Unaffected status, suitable for modern electronic designs.

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