AP3003T-3.3E1 Equivalent & Substitute Parts

Part Overview

The AP3003T-3.3E1 is a switching regulator IC manufactured by Diodes Incorporated, designed for buck (step-down) voltage regulation applications in TO-220-5 through-hole packaging. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing design support, production continuity, and long-term component sourcing strategies.

Substiute Parts

AP3003T-3.3E1

Diodes IncorporatedIn Stock: 912AP3003T-3.3E1 Datasheet

Current PartRFQ

LM2596T-3.3/NOPB

Texas InstrumentsIn Stock: 4142LM2596T-3.3/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP3003T-3.3E1 is determined by the following critical parameters:

• Package / Case: TO-220-5 through-hole form factor (mechanical and thermal compatibility)
• Output Voltage: 3.3V fixed output (functional requirement)
• Output Current: 3A minimum rating (load capacity)
• Topology: Buck (step-down) switching regulator (functional architecture)
• Product Status: Active manufacturing status (availability and support)
• Compliance: ROHS3 and REACH compliance (regulatory alignment)

The LM2596T-3.3/NOPB from Texas Instruments meets all substitution criteria as an active, functionally equivalent buck regulator with identical output specifications and package configuration.

Parameter Comparison

Engineering Selection Recommendations

The LM2596T-3.3/NOPB is the designated substitute for the obsolete AP3003T-3.3E1. Selection is based on:

• Active Product Status: The LM2596T-3.3/NOPB maintains active manufacturing and distribution status, ensuring long-term availability and technical support from Texas Instruments.
• Regulatory Compliance: Both components maintain ROHS3 and REACH compliance, satisfying current environmental and safety standards.
• Functional Equivalence: Identical output voltage (3.3V), output current rating (3A), and buck topology ensure direct functional replacement.
• Package Compatibility: Both components use TO-220-5 through-hole packaging, enabling direct PCB layout compatibility without redesign.
• Moisture Sensitivity: Both components carry MSL 1 rating, indicating unlimited shelf life and identical handling requirements.

Frequently Asked Questions (FAQ)

Q: Can the LM2596T-3.3/NOPB be used as a direct replacement for the AP3003T-3.3E1 without PCB modifications?

A: Yes. Both components share identical TO-220-5 through-hole packaging and pinout compatibility, allowing direct substitution on existing PCB layouts without modification.

Q: What is the primary reason for substituting the AP3003T-3.3E1?

A: The AP3003T-3.3E1 is classified as obsolete. The LM2596T-3.3/NOPB is an active product with ongoing manufacturing support, ensuring component availability for new production runs and field replacements.

Q: Are there compliance differences between these components?

A: No. Both the AP3003T-3.3E1 and LM2596T-3.3/NOPB maintain identical ROHS3 and REACH compliance status, with MSL 1 moisture sensitivity ratings.

Q: What are the key electrical parameters that define this substitution?

A: Output voltage (3.3V fixed), output current capability (3A), input voltage range support, switching topology (buck), and operating temperature range determine substitution validity. Both components meet these specifications.

Q: Is the LM2596T-3.3/NOPB available in alternative packaging options?

A: The substitute part is specified in TO-220-5 Formed Leads packaging to match the original component. Consult the Texas Instruments product family for alternative package options if required by design constraints.