AP431AVG-A Equivalent & Substitute Parts

Part Overview

The AP431AVG-A is a shunt voltage reference IC manufactured by Diodes Incorporated, designed for adjustable voltage regulation applications. This component operates with an adjustable output range of 2.495V to 36V, delivering up to 200mA output current with ±0.5% tolerance. The part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across critical parameters including output voltage range, tolerance, and thermal characteristics while accommodating different packaging and product status considerations.

Substiute Parts

AP431AVG-A

Diodes IncorporatedIn Stock: 1268AP431AVG-A Datasheet

Current PartRFQ

AS431AZTR-G1

Diodes IncorporatedIn Stock: 150275AS431AZTR-G1 Datasheet

MFR RecommendedRFQ

TL431BFDT,215

Nexperia USA Inc.In Stock: 4138TL431BFDT,215 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AP431AVG-A is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Requirements:

• Reference type must be shunt
• Output type must be adjustable
• Output voltage range must encompass or match 2.495V minimum and 36V maximum
• Tolerance must be ±0.5% or better
• Output current capability must meet or exceed application requirements

Mechanical Compatibility Requirements:

• Mounting type and package form factor determine physical fit
• Through-hole TO-92 packaging is the primary form factor for the main part
• Surface-mount alternatives (TO-236AB) are acceptable only when board design permits

Compliance Requirements:

• RoHS3 compliance is mandatory
• REACH unaffected status is required
• Product status (active vs. obsolete) affects long-term availability

Two substitute parts are identified: AS431AZTR-G1 (through-hole TO-92 form factor) and TL431BFDT,215 (surface-mount TO-236AB form factor). Both maintain the core electrical specifications while offering different packaging options and improved product status.

Parameter Comparison

Engineering Selection Recommendations

AS431AZTR-G1 Selection Criteria: This substitute maintains identical through-hole TO-92-3 packaging, enabling direct board-level replacement without layout modifications. Both parts are manufactured by Diodes Incorporated, ensuring consistent design philosophy and pin compatibility. AS431AZTR-G1 offers active product status with extended operating temperature range (-40°C to 125°C versus -20°C to 85°C), superior moisture sensitivity rating (MSL 1 versus MSL 3), and improved temperature coefficient (20ppm/°C typical). Output current is reduced to 100mA; applications requiring the full 200mA output capability of the AP431AVG-A must evaluate this limitation against circuit requirements. RoHS3 compliance and REACH unaffected status are maintained.

TL431BFDT,215 Selection Criteria: This substitute provides active product status and extended operating temperature range (-40°C to 125°C). The part is manufactured by Nexperia USA Inc. and includes AEC-Q100 automotive qualification. Surface-mount TO-236AB packaging requires board redesign and is suitable only for new designs or boards with existing surface-mount infrastructure. Output current is 100mA, identical to AS431AZTR-G1. RoHS3 compliance and REACH unaffected status are maintained. This option is appropriate when automotive-grade qualification is required or when surface-mount assembly processes are standard.

Primary Recommendation: For direct replacement in existing through-hole designs, AS431AZTR-G1 is the preferred substitute, offering form-factor compatibility and active product status. For new designs permitting surface-mount assembly, TL431BFDT,215 provides automotive qualification and extended environmental specifications.

Frequently Asked Questions (FAQ)

Q: Can AS431AZTR-G1 directly replace AP431AVG-A in existing designs? A: Yes, AS431AZTR-G1 maintains identical TO-92-3 through-hole packaging and pin configuration. Electrical parameters are compatible for applications requiring 100mA or less output current. The 50mA reduction in maximum output current must be evaluated against circuit requirements.

Q: What is the primary difference between AS431AZTR-G1 and TL431BFDT,215? A: The primary difference is packaging: AS431AZTR-G1 uses through-hole TO-92-3 form factor, while TL431BFDT,215 uses surface-mount TO-236AB form factor. TL431BFDT,215 includes AEC-Q100 automotive qualification. Both deliver 100mA maximum output current.

Q: Why is output current reduced in the substitute parts? A: AS431AZTR-G1 and TL431BFDT,215 are specified for 100mA maximum output current, compared to 200mA for AP431AVG-A. Circuit designs must confirm that 100mA output current is sufficient for the application. If higher output current is required, alternative parts must be evaluated.

Q: Are the substitute parts RoHS compliant? A: Yes, both AS431AZTR-G1 and TL431BFDT,215 are ROHS3 compliant and REACH unaffected, meeting current environmental regulations.

Q: What is the temperature operating range difference? A: AP431AVG-A operates from -20°C to 85°C. Both substitute parts extend this range to -40°C to 125°C, providing improved thermal performance for demanding applications.

Q: Is TL431BFDT,215 suitable for automotive applications? A: Yes, TL431BFDT,215 carries AEC-Q100 automotive qualification, making it appropriate for automotive-grade designs. AS431AZTR-G1 does not carry automotive qualification.

Q: What does MSL rating mean for these parts? A: Moisture Sensitivity Level (MSL) indicates the component's sensitivity to moisture during storage and handling. AP431AVG-A has MSL 3 (168-hour shelf life), while both substitutes have MSL 1 (unlimited shelf life), indicating superior moisture resistance and longer storage capability.