AP3003T-5.0E1 Equivalent & Substitute Parts

Part Overview

The AP3003T-5.0E1 is a switching regulator IC in TO-220-5 package manufactured by Diodes Incorporated, designed for buck (step-down) voltage regulation applications. This part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. Obsolete status indicates the manufacturer has discontinued production, necessitating qualified substitute components that maintain electrical and mechanical compatibility with existing designs.

Substiute Parts

AP3003T-5.0E1

Diodes IncorporatedIn Stock: 8996AP3003T-5.0E1 Datasheet

Current PartRFQ

LM2596T-5.0/NOPB

National SemiconductorIn Stock: 20316LM2596T-5.0/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP3003T-5.0E1 is determined by the following critical parameters:

• Package Compatibility: TO-220-5 package with through-hole mounting ensures mechanical and thermal interface compatibility
• Functional Classification: Buck switching regulator topology for step-down voltage conversion
• Output Configuration: Fixed 5V positive output
• Current Rating: 3A output current capability
• Regulatory Compliance: ROHS3 compliance and REACH unaffected status maintain environmental and regulatory alignment

The LM2596T-5.0/NOPB qualifies as a direct substitute based on matching all critical parameters within the allowed electrical and mechanical specifications for this product category.

Parameter Comparison

Engineering Selection Recommendations

The LM2596T-5.0/NOPB is the qualified substitute for the obsolete AP3003T-5.0E1 based on the following engineering criteria:

• Active Product Status: The LM2596T-5.0/NOPB maintains active production status, ensuring long-term availability and supply chain continuity
• Package Equivalence: Both components utilize TO-220-5 through-hole packaging, providing direct mechanical and thermal compatibility without PCB redesign
• Functional Equivalence: Both are fixed 5V buck switching regulators with matching output configuration and current rating
• Regulatory Compliance: The substitute maintains compatibility with existing compliance requirements for the application

Frequently Asked Questions (FAQ)

Q: Can the LM2596T-5.0/NOPB be used as a direct replacement for the AP3003T-5.0E1 without PCB modifications?

A: Yes. Both components share identical TO-220-5 through-hole package specifications and pinout compatibility, allowing direct substitution without PCB layout changes.

Q: What is the primary reason for substitution?

A: The AP3003T-5.0E1 is obsolete and no longer manufactured by Diodes Incorporated. The LM2596T-5.0/NOPB provides equivalent functionality with active production status.

Q: Are there electrical performance differences between these parts?

A: Both components are fixed 5V buck regulators with 3A output capability. The LM2596T-5.0/NOPB specifies 150kHz switching frequency and -40°C to 125°C operating temperature range. Detailed electrical characteristics should be verified against respective datasheets for specific application requirements.

Q: Does the substitute meet the same regulatory standards?

A: The AP3003T-5.0E1 is ROHS3 compliant and REACH unaffected. Regulatory compliance status for the LM2596T-5.0/NOPB should be confirmed with the manufacturer for your specific application requirements.

Q: What is the difference between TO-220-5 and TO-220-5 Formed Leads?

A: Both designations refer to the same five-lead TO-220 package. "Formed Leads" indicates the leads have been shaped for insertion into PCB holes. This is a standard manufacturing variation and does not affect compatibility.