AP431SRG-7 Equivalent & Substitute Parts

Part Overview

The AP431SRG-7 is a shunt voltage reference IC manufactured by Diodes Incorporated, designed for adjustable output voltage regulation in power management applications. This component operates with an adjustable output range of 2.495V to 36V, delivering up to 200mA output current with ±1% tolerance. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Substiute Parts

AP431SRG-7

Diodes IncorporatedIn Stock: 59761AP431SRG-7 Datasheet

Current PartRFQ

AS431BNTR-G1

Diodes IncorporatedIn Stock: 519412AS431BNTR-G1 Datasheet

MFR RecommendedRFQ

AP431WG-7

Diodes IncorporatedIn Stock: 18074AP431WG-7 Datasheet

Parametric EquivalentRFQ

TL431BMFDTVL

Nexperia USA Inc.In Stock: 914TL431BMFDTVL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AP431SRG-7 is determined by the following critical parameters:

• Reference Type: Shunt voltage reference
• Output Type: Adjustable
• Voltage Range: 2.495V minimum to 36V maximum output capability
• Output Current: Minimum 200mA requirement
• Tolerance: ±1% or better
• Package Compatibility: TO-236-3, SC-59, or SOT-23-3 surface mount packages
• Temperature Range: Operating capability within -20°C to 85°C minimum
• RoHS Compliance: ROHS3 Compliant

Substitute parts are grouped into two categories: MFR Recommended substitutes (manufacturer-endorsed alternatives) and Parametric Equivalents (parts meeting core electrical specifications with potential package or performance variations).

Parameter Comparison

Engineering Selection Recommendations

AS431BNTR-G1 (MFR Recommended): This Diodes Incorporated substitute is the primary recommendation. It maintains the same reference type, adjustable output, and voltage range as the AP431SRG-7. The part is currently active in production, ensuring long-term availability. The output current is reduced to 100mA (versus 200mA), which represents a design constraint that must be evaluated against application requirements. The operating temperature range is expanded to -40°C ~ 125°C, providing broader environmental coverage. Tolerance remains ±1%, and all compliance certifications (ROHS3, REACH Unaffected) are maintained.

TL431BMFDTVL (MFR Recommended): This Nexperia substitute offers superior tolerance performance at ±0.5% (versus ±1%), making it suitable for applications requiring tighter voltage regulation. The part is AEC-Q100 qualified, indicating automotive-grade reliability. Output current is limited to 100mA. The operating temperature range extends to -40°C ~ 125°C. This part is active in production and fully compliant with RoHS3 and REACH requirements. Selection of this part is appropriate when enhanced accuracy and automotive qualification are required.

AP431WG-7 (Parametric Equivalent): This Diodes Incorporated part provides parametric equivalence with identical electrical specifications (2.495V output, 200mA current, ±1% tolerance, 30ppm/°C temperature coefficient). The primary difference is the package variant (SC-59-3 versus SOT23R). This part is obsolete, limiting its suitability for new designs despite electrical compatibility.

Frequently Asked Questions (FAQ)

Q: Can AS431BNTR-G1 replace AP431SRG-7 in all applications?

A: AS431BNTR-G1 is electrically compatible with AP431SRG-7 for shunt voltage reference applications. However, the output current specification is reduced from 200mA to 100mA. Applications requiring the full 200mA output current must be re-evaluated. The expanded operating temperature range (-40°C ~ 125°C versus -20°C ~ 85°C) is beneficial for broader environmental conditions.

Q: What is the difference between the MFR Recommended and Parametric Equivalent categories?

A: MFR Recommended substitutes are manufacturer-endorsed alternatives with active production status and verified compatibility. Parametric Equivalents meet the core electrical specifications but may have obsolete status or package variations. MFR Recommended parts are preferred for new designs and production continuity.

Q: Is TL431BMFDTVL suitable for automotive applications?

A: Yes. TL431BMFDTVL carries AEC-Q100 qualification, indicating compliance with automotive reliability standards. This part is appropriate for automotive power management designs requiring shunt voltage reference functionality.

Q: Are all substitute parts compatible with the SOT-23-3 package footprint?

A: All listed substitute parts are available in TO-236-3, SC-59, or SOT-23-3 packages. Verify the specific supplier device package designation for your procurement to ensure footprint compatibility with existing PCB designs.

Q: What is the impact of tolerance differences between parts?

A: AP431SRG-7, AS431BNTR-G1, and AP431WG-7 all specify ±1% tolerance. TL431BMFDTVL offers ±0.5% tolerance, providing tighter voltage regulation accuracy. Selection depends on application requirements for output voltage precision.

Q: Can I use a substitute part with a lower output current rating?

A: Substitutes with reduced output current (100mA versus 200mA) can be used only if the application circuit does not require the full 200mA output current. Circuit redesign or current limiting may be necessary. Verify actual current requirements before substitution.