AP431QG-7 Equivalent & Substitute Parts

Part Overview

The AP431QG-7 is a shunt voltage reference IC manufactured by Diodes Incorporated, designed for precision voltage regulation and reference applications. This adjustable reference device operates across a 2.495V to 36V output range with ±1% tolerance and supports up to 200 mA output current in a compact SOT-25 surface mount package.

The AP431QG-7 is classified as obsolete. Identifying suitable substitute components is essential for ongoing production support, design updates, and inventory management where original stock becomes unavailable.

Substiute Parts

AP431QG-7

Diodes IncorporatedIn Stock: 18462AP431QG-7 Datasheet

Current PartRFQ

AS431BKTR-G1

Diodes IncorporatedIn Stock: 4229AS431BKTR-G1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP431QG-7 is determined by the following critical electrical and mechanical parameters:

• Reference Type: Shunt voltage reference architecture
• Output Type: Adjustable output voltage capability
• Voltage Range: Minimum 2.495V to 36V maximum output
• Output Current: Minimum 200 mA capability
• Tolerance: ±1% accuracy specification
• Package Compatibility: SOT-25 surface mount footprint
• Compliance: ROHS3 and REACH requirements

The AS431BKTR-G1 qualifies as a direct substitute based on matching reference type, adjustable output, voltage range, tolerance specification, surface mount technology, and regulatory compliance. Variations in output current capacity, temperature coefficient, and cathode current are within acceptable substitution parameters for this component category.

Parameter Comparison

Engineering Selection Recommendations

The AS431BKTR-G1 is the qualified substitute for the AP431QG-7 based on the following engineering criteria:

Both components are manufactured by Diodes Incorporated and maintain identical shunt reference architecture with adjustable output capability. Both meet ±1% tolerance specification and operate across the full 36V maximum voltage range. Both components are ROHS3 compliant and carry identical MSL-3 moisture sensitivity ratings.

The AS431BKTR-G1 offers extended operating temperature range (-40°C to 125°C versus -20°C to 85°C) and active product status, ensuring long-term availability and supply chain continuity. The AS431BKTR-G1 is available in active inventory with 4,122 units in stock.

Design consideration: The AS431BKTR-G1 specifies 100 mA maximum output current compared to 200 mA for the AP431QG-7. Applications requiring output current exceeding 100 mA must evaluate alternative designs or external current amplification stages.

Frequently Asked Questions (FAQ)

Q: Can the AS431BKTR-G1 directly replace the AP431QG-7 in existing designs?

A: The AS431BKTR-G1 is electrically compatible for applications where output current does not exceed 100 mA. Both components share identical reference architecture, adjustable output capability, voltage range, and tolerance specifications. Package footprints differ (SOT-25 versus SOT-23-5), requiring PCB layout verification.

Q: What is the primary limitation of the AS431BKTR-G1 substitute?

A: The AS431BKTR-G1 supports maximum 100 mA output current, compared to 200 mA for the AP431QG-7. Applications requiring higher output current must implement external current amplification or select alternative reference designs.

Q: Are there compliance differences between these components?

A: Both components maintain identical ROHS3 compliance and REACH unaffected status. MSL ratings are identical at level 3 (168 hours). No compliance barriers exist for substitution.

Q: How do package differences affect substitution?

A: The AP431QG-7 uses SOT-25 packaging while the AS431BKTR-G1 uses SOT-23-5 packaging. Both are surface mount technologies with different pin configurations and footprints. PCB redesign is required for physical substitution.

Q: What is the temperature operating range difference?

A: The AP431QG-7 operates from -20°C to 85°C. The AS431BKTR-G1 extends this range to -40°C to 125°C, providing broader environmental capability for demanding applications.