AP3003T-12E1 Equivalent & Substitute Parts

Part Overview

The AP3003T-12E1 is a switching regulator IC manufactured by Diodes Incorporated, designed for power management applications in a TO-220-5 package configuration. This component functions as a buck (step-down) converter for regulated power supply designs. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, design updates, and procurement continuity.

Substiute Parts

AP3003T-12E1

Diodes IncorporatedIn Stock: 2710AP3003T-12E1 Datasheet

Current PartRFQ

LM2596T-12/NOPB

Texas InstrumentsIn Stock: 1000441LM2596T-12/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP3003T-12E1 is determined by alignment across the following critical parameters:

• Package / Case: TO-220-5 form factor ensures mechanical and thermal compatibility with existing PCB layouts and heatsinking infrastructure
• Mounting Type: Through-hole technology maintains compatibility with legacy and current board designs
• Regulatory Compliance: ROHS3 compliance and REACH unaffected status ensure environmental and supply chain continuity
• Moisture Sensitivity Level: MSL 1 rating indicates no special storage or handling requirements
• Functional Classification: Power Management (PMIC) category with buck converter topology

The LM2596T-12/NOPB from Texas Instruments meets all these criteria and is classified as an active product with current manufacturing and inventory support.

Parameter Comparison

Engineering Selection Recommendations

The LM2596T-12/NOPB is the designated substitute for the obsolete AP3003T-12E1 based on the following engineering criteria:

• Package Compatibility: Both components utilize the TO-220-5 package, ensuring direct mechanical and thermal interface compatibility with existing PCB designs
• Regulatory Alignment: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying environmental and supply chain requirements
• Active Product Status: The LM2596T-12/NOPB is an active product with established manufacturing support and documented availability, eliminating obsolescence risk
• Compliance Certification: Identical MSL ratings and regulatory classifications ensure no additional qualification or handling procedures are required during transition

Frequently Asked Questions (FAQ)

Q: Can the LM2596T-12/NOPB be used as a direct replacement for the AP3003T-12E1?

A: Yes. Both components share the TO-220-5 package, identical fixed 12V output configuration, through-hole mounting type, and equivalent regulatory compliance status. The LM2596T-12/NOPB is an active product with current manufacturing support, eliminating the obsolescence constraint of the AP3003T-12E1.

Q: Are there any PCB layout modifications required when substituting these parts?

A: No PCB layout modifications are required. The TO-220-5 package pinout and thermal interface are identical between both components, allowing direct pin-for-pin substitution without design changes.

Q: What is the significance of the TO-220-5 package specification?

A: The TO-220-5 package defines the physical form factor, pin configuration, and thermal characteristics. This standardized package ensures mechanical fit, electrical connectivity, and heatsinking capability are maintained across both the original and substitute components.

Q: Does the LM2596T-12/NOPB meet the same environmental and compliance requirements?

A: Yes. The LM2596T-12/NOPB carries ROHS3 compliance, REACH unaffected status, and MSL 1 rating, matching the environmental and regulatory profile of the AP3003T-12E1. No additional compliance documentation or qualification is required.

Q: Why is product status relevant to component substitution?

A: Product status indicates manufacturing continuity and supply chain availability. The AP3003T-12E1 is obsolete, meaning production has ceased and inventory is limited. The LM2596T-12/NOPB is active, ensuring reliable long-term availability and support for current and future applications.