AP431VG-A Equivalent & Substitute Parts

Part Overview

The AP431VG-A is a shunt voltage reference IC manufactured by Diodes Incorporated, designed for adjustable voltage regulation applications. This through-hole TO-92 package component provides an adjustable output range from 2.495V to 36V with ±1% tolerance and 200 mA output current capability. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing design support, maintenance, and new production requirements where pin-compatible or functionally equivalent alternatives are required.

Key Parameters

Parameter	Value
Manufacturer Part Number	AP431VG-A
Manufacturer	Diodes Incorporated
Category	Power Management (PMIC)
Reference Type	Shunt
Output Type	Adjustable
Voltage - Output (Min/Fixed)	2.495V
Voltage - Output (Max)	36V
Current - Output	200 mA
Tolerance	±1%
Temperature Coefficient	30 ppm/°C
Current - Cathode	500 µA
Operating Temperature	-20°C ~ 85°C
Mounting Type	Through Hole
Package / Case	TO-226-3, TO-92-3 (TO-226AA)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the AP431VG-A is determined by the following critical parameters:

Functional Compatibility Requirements:

Reference Type: Shunt voltage reference
Output Type: Adjustable
Voltage Output Range: Minimum 2.495V, Maximum 36V
Tolerance: ±1%
Output Current: Minimum 200 mA capability

Package Compatibility:

Through-hole mounting (TO-92 package family) for direct PCB replacement

Compliance Requirements:

RoHS3 compliance
Operating temperature range support

Two substitute parts are identified:

AS431BZTR-G1 (Diodes Incorporated) - Through-hole TO-92 package, active product status, meets functional requirements with reduced output current (100 mA) and improved temperature coefficient
TL431AFDT,215 (Nexperia USA Inc.) - Surface-mount TO-236AB package, active product status, automotive-grade with AEC-Q100 qualification, requires PCB layout modification

Parameter Comparison

Parameter	AP431VG-A	AS431BZTR-G1	TL431AFDT,215
Manufacturer	Diodes Incorporated	Diodes Incorporated	Nexperia USA Inc.
Reference Type	Shunt	Shunt	Shunt
Output Type	Adjustable	Adjustable	Adjustable
Voltage - Output (Min/Fixed)	2.495V	2.5V	2.495V
Voltage - Output (Max)	36V	36V	36V
Current - Output	200 mA	100 mA	100 mA
Tolerance	±1%	±1%	±1%
Temperature Coefficient	30 ppm/°C	20 ppm/°C Typical	Not specified
Current - Cathode	500 µA	1 mA	600 µA
Operating Temperature	-20°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Through Hole	Through Hole	Surface Mount
Package / Case	TO-92-3	TO-92-3	TO-236AB (SOT-23-3)
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

AS431BZTR-G1 Selection Criteria:

Direct through-hole TO-92 package replacement for AP431VG-A
Active product status with full manufacturing support
Identical voltage output range (2.495V to 36V) and tolerance (±1%)
Output current reduced to 100 mA; suitable for applications not requiring full 200 mA capability
Extended operating temperature range (-40°C to 125°C) provides broader environmental coverage
Improved temperature coefficient (20 ppm/°C typical) enhances stability
ROHS3 compliant with MSL-1 rating (unlimited moisture exposure)
Recommended for direct PCB replacement without layout modification

TL431AFDT,215 Selection Criteria:

Surface-mount TO-236AB package requires PCB redesign
Active product status with automotive-grade qualification (AEC-Q100)
Identical voltage output range (2.495V to 36V) and tolerance (±1%)
Output current reduced to 100 mA; suitable for applications not requiring full 200 mA capability
Extended operating temperature range (-40°C to 125°C)
ROHS3 compliant with MSL-1 rating
Recommended for new designs requiring automotive-grade components or surface-mount integration

Frequently Asked Questions (FAQ)

Q: Can AS431BZTR-G1 directly replace AP431VG-A without PCB modification? A: Yes. Both components use identical TO-92-3 through-hole package configuration with the same pin assignments. No PCB layout changes are required for direct substitution.

Q: What is the impact of reduced output current (100 mA vs. 200 mA) when using AS431BZTR-G1? A: The substitute part is suitable for applications where the load current does not exceed 100 mA. If your circuit requires the full 200 mA output capability, verify that the actual load current requirement is within the 100 mA limit before substitution.

Q: Why is TL431AFDT,215 listed as a substitute if it requires surface-mount conversion? A: TL431AFDT,215 is provided as an alternative for new design implementations or redesign projects where surface-mount technology is preferred. It is not recommended for direct replacement in existing through-hole designs without PCB modification.

Q: Are all substitute parts RoHS3 compliant? A: Yes. Both AS431BZTR-G1 and TL431AFDT,215 are ROHS3 compliant, matching the compliance status of the original AP431VG-A.

Q: What is the difference in operating temperature range between AP431VG-A and the substitutes? A: AP431VG-A operates from -20°C to 85°C. Both substitute parts extend this range to -40°C to 125°C, providing enhanced performance in wider environmental conditions.

Q: Can TL431AFDT,215 be used in existing AP431VG-A designs without modification? A: No. TL431AFDT,215 uses a surface-mount TO-236AB package, which is incompatible with through-hole PCB designs. PCB redesign is required for integration.

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