AP431AQG-7 Equivalent & Substitute Parts

Part Overview

The AP431AQG-7 is a shunt voltage reference IC manufactured by Diodes Incorporated, designed for precision voltage regulation applications. This adjustable reference device operates across a 2.495V to 36V output range with ±0.5% tolerance and supports 200 mA output current in a SOT-25 surface mount package.

The AP431AQG-7 is classified as obsolete. Identifying suitable substitute components is essential for ongoing design support, production continuity, and long-term system reliability when original inventory becomes unavailable.

Substiute Parts

AP431AQG-7

Diodes IncorporatedIn Stock: 1129AP431AQG-7 Datasheet

Current PartRFQ

AS431AKTR-G1

Diodes IncorporatedIn Stock: 4071AS431AKTR-G1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AP431AQG-7 is determined by the following critical parameters:

Reference Type: Both the main part and substitute must function as shunt voltage references to maintain circuit topology compatibility.

Output Type: Adjustable output capability is required to preserve the voltage regulation function across the specified range.

Voltage Range Compatibility: The substitute must support the full 2.495V to 36V output range or encompass the operating range required by the application circuit.

Tolerance & Accuracy: The ±0.5% tolerance specification must be maintained to ensure precision voltage regulation performance.

Output Current Capability: The substitute must deliver sufficient current capacity for the application. The AP431AQG-7 provides 200 mA; substitutes with equal or greater output current are acceptable.

Package Compatibility: Surface mount packages in the SC-74A / SOT-753 family are required for mechanical and thermal compatibility.

Compliance & Certifications: RoHS3 compliance and REACH unaffected status must be maintained for regulatory alignment.

The AS431AKTR-G1 meets these substitution criteria as an active, functionally equivalent alternative from the same manufacturer.

Parameter Comparison

Engineering Selection Recommendations

The AS431AKTR-G1 is the manufacturer-recommended substitute for the obsolete AP431AQG-7. Both devices are manufactured by Diodes Incorporated and maintain identical RoHS3 compliance and REACH unaffected status.

Active Product Status: The AS431AKTR-G1 is classified as active, ensuring long-term availability and continued manufacturing support compared to the obsolete AP431AQG-7.

Voltage Range Alignment: Both parts support the full 2.495V to 36V output range with matching ±0.5% tolerance, preserving voltage regulation accuracy in existing circuit designs.

Output Current Consideration: The AS431AKTR-G1 provides 100 mA output current versus 200 mA for the AP431AQG-7. Circuit designs requiring the full 200 mA output capability must verify that the substitute's 100 mA rating is sufficient for the application load.

Temperature Performance: The AS431AKTR-G1 operates across -40°C to 125°C, extending the lower and upper temperature limits compared to the AP431AQG-7 (-20°C to 85°C). The AS431AKTR-G1 also exhibits superior temperature coefficient performance at 20 ppm/°C typical versus 30 ppm/°C.

Moisture Sensitivity: The AS431AKTR-G1 carries MSL 1 (unlimited moisture exposure) compared to MSL 3 (168 hours) for the AP431AQG-7, reducing handling and storage constraints.

Package Transition: The AS431AKTR-G1 uses SOT-23-5 packaging versus SOT-25 for the AP431AQG-7. Both are surface mount packages within the SC-74A / SOT-753 family, but PCB layout and footprint verification is required before implementation.

Frequently Asked Questions (FAQ)

Q: Can the AS431AKTR-G1 directly replace the AP431AQG-7 in existing designs?

A: Functional substitution is possible if the application circuit requires 100 mA or less output current. The voltage range, tolerance, and reference type are identical. PCB footprint modification is necessary due to the SOT-25 to SOT-23-5 package transition.

Q: What is the impact of the 100 mA output current limit on the AS431AKTR-G1?

A: Applications drawing more than 100 mA from the reference output cannot use the AS431AKTR-G1 without external current amplification. Review the circuit schematic to confirm maximum reference current requirements.

Q: Are there compliance or regulatory differences between these parts?

A: Both parts maintain ROHS3 compliance and REACH unaffected status. No regulatory barriers exist for substitution. The AS431AKTR-G1 offers improved moisture sensitivity classification (MSL 1 versus MSL 3), reducing handling constraints.

Q: How do the temperature coefficients compare?

A: The AS431AKTR-G1 exhibits 20 ppm/°C typical temperature coefficient versus 30 ppm/°C for the AP431AQG-7. This represents improved temperature stability. The AS431AKTR-G1 also supports a wider operating temperature range (-40°C to 125°C versus -20°C to 85°C).

Q: What package considerations apply to this substitution?

A: The AP431AQG-7 uses SOT-25 packaging while the AS431AKTR-G1 uses SOT-23-5. Both are surface mount packages, but pin configuration and PCB footprint differ. Verify footprint compatibility and reflow profile suitability before production implementation.

Q: Is the AS431AKTR-G1 available in the same packaging format?

A: The AS431AKTR-G1 is supplied in Tape & Reel (TR) format, suitable for automated assembly. Confirm packaging format compatibility with your procurement and assembly processes.