AP431AWL-7 Equivalent & Substitute Parts

Part Overview

The AP431AWL-7 is a shunt voltage reference IC manufactured by Diodes Incorporated, designed for adjustable voltage regulation applications. This component provides a fixed output voltage of 2.495V with adjustable capability up to 36V, supporting output currents up to 200mA with ±0.5% tolerance. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity.

Substiute Parts

AP431AWL-7

Diodes IncorporatedIn Stock: 21305AP431AWL-7 Datasheet

Current PartRFQ

AP431ARG-7

Diodes IncorporatedIn Stock: 23454AP431ARG-7 Datasheet

Parametric EquivalentRFQ

LM431SBCM3X

onsemiIn Stock: 16318LM431SBCM3X Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AP431AWL-7 are identified based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

• Reference Type: Shunt
• Output Type: Adjustable
• Voltage Range: Minimum 2.495V output, maximum 36V capability
• Package Compatibility: TO-236-3, SC-59, or SOT-23-3 form factors
• Mounting Type: Surface Mount

Substitution Categories:

Parametric Equivalent: AP431ARG-7 maintains identical electrical specifications including 200mA output current, ±0.5% tolerance, and 30ppm/°C temperature coefficient. The primary difference is the supplier device package designation (SC-59R versus SC-59-3), representing a packaging variant of the same base product (AP431).

Manufacturer Recommended Equivalent: LM431SBCM3X from onsemi provides functional equivalence with allowable parameter variations. This part maintains the core shunt reference architecture with 2.495V to 36V adjustable output range and SOT-23-3 package compatibility. Parameter deviations include reduced output current (100mA versus 200mA), increased tolerance (±1% versus ±0.5%), higher temperature coefficient (50ppm/°C typical versus 30ppm/°C), and higher cathode current (1mA versus 500µA). The LM431SBCM3X carries Active product status and MSL-1 rating, providing superior long-term availability and moisture handling characteristics.

Parameter Comparison

Engineering Selection Recommendations

AP431ARG-7 Selection Criteria: Select AP431ARG-7 when direct parametric equivalence is required and design specifications mandate 200mA output current, ±0.5% tolerance, and 30ppm/°C temperature coefficient performance. This part maintains identical electrical characteristics to the AP431AWL-7 with only packaging variant differences. Both parts carry Obsolete product status, so long-term availability should be verified with suppliers. Both are ROHS3 compliant with MSL-3 ratings.

LM431SBCM3X Selection Criteria: Select LM431SBCM3X when design flexibility permits tolerance of parameter variations and long-term component availability is a priority. This part is classified as Active product status, ensuring sustained manufacturing and supply chain support. The LM431SBCM3X provides superior moisture handling with MSL-1 rating (unlimited shelf life) compared to MSL-3 requirements of the Diodes parts. Design applications requiring output currents exceeding 100mA should not use this substitute. Applications sensitive to temperature coefficient performance (requiring better than 50ppm/°C) should verify circuit performance with the higher temperature coefficient specification.

Frequently Asked Questions (FAQ)

Q: Can AP431ARG-7 be used as a direct replacement for AP431AWL-7?

A: Yes. AP431ARG-7 is a parametric equivalent with identical electrical specifications. The difference is the supplier device package designation (SC-59R versus SC-59-3), representing a packaging variant of the same base product series. Both parts are manufactured by Diodes Incorporated and carry Obsolete status.

Q: What are the limitations of using LM431SBCM3X as a substitute?

A: LM431SBCM3X has three parameter deviations: reduced output current (100mA maximum versus 200mA), increased tolerance (±1% versus ±0.5%), and higher temperature coefficient (50ppm/°C typical versus 30ppm/°C). Designs requiring the full 200mA output current capability cannot use this substitute. Circuits with tight voltage regulation requirements may require re-evaluation with the ±1% tolerance specification.

Q: Are all three parts compatible with the same PCB footprint?

A: Yes. All three parts use TO-236-3, SC-59, or SOT-23-3 package designations with surface mount mounting type, ensuring mechanical and electrical compatibility on existing PCB layouts.

Q: Why is LM431SBCM3X recommended despite parameter differences?

A: LM431SBCM3X carries Active product status with unlimited long-term availability, whereas both Diodes parts are Obsolete. The MSL-1 rating provides superior moisture protection compared to MSL-3. For applications where the 100mA output current and ±1% tolerance are acceptable, this part offers superior supply chain continuity and handling characteristics.

Q: What is the temperature operating range difference?

A: AP431AWL-7 and AP431ARG-7 operate from -20°C to 85°C. LM431SBCM3X extends the lower temperature limit to -25°C, providing 5°C additional cold-temperature operation capability.

Q: Are all parts RoHS compliant?

A: Yes. All three parts are ROHS3 compliant and carry REACH Unaffected status, meeting current environmental and regulatory requirements.