AP3003S-12TRE1 Equivalent & Substitute Parts

Part Overview

The AP3003S-12TRE1 is a buck switching regulator IC manufactured by Diodes Incorporated, designed for step-down voltage conversion with a fixed 12V output and 3A output current capability. The device is housed in a TO-263-6 D2PAK package with 5 leads plus tab configuration.

This part carries an Obsolete product status, making it necessary to identify equivalent substitute components for ongoing design requirements and procurement needs. Substitute parts must maintain functional compatibility across critical electrical parameters including input voltage range, output voltage, current rating, and package configuration.

Substiute Parts

AP3003S-12TRE1

Diodes IncorporatedIn Stock: 32900AP3003S-12TRE1 Datasheet

Current PartRFQ

AP1501-12K5G-13

Diodes IncorporatedIn Stock: 2079AP1501-12K5G-13 Datasheet

MFR RecommendedRFQ

LM2576D2TR4-012G

onsemiIn Stock: 3588LM2576D2TR4-012G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AP3003S-12TRE1 are qualified based on the following critical parameters:

• Output Voltage: Fixed 12V output (non-negotiable)
• Output Current: Minimum 3A capability
• Package Type: TO-263-6 D2PAK (5 Leads + Tab) for mechanical and thermal compatibility
• Topology: Buck switching regulator configuration
• Compliance: ROHS3 compliance and EAR99 ECCN classification

Two qualified substitute parts meet these criteria: AP1501-12K5G-13 (Diodes Incorporated) and LM2576D2TR4-012G (onsemi). Both devices provide the required 12V fixed output at 3A in identical packaging, enabling direct functional replacement in existing designs.

Parameter Comparison

Engineering Selection Recommendations

AP1501-12K5G-13 (Diodes Incorporated): This substitute maintains manufacturer continuity with the original AP3003S-12TRE1. It provides identical switching frequency (150kHz) and output specifications. The part carries Last Time Buy status, indicating limited future availability. Input voltage range extends to 4.5V minimum and 40V maximum, offering broader input compatibility than the original. Operating temperature range is -20°C to 85°C. This option is suitable for designs requiring Diodes Incorporated component consistency.

LM2576D2TR4-012G (onsemi): This substitute is currently Active in production, ensuring long-term availability and supply chain stability. It delivers the required 12V 3A output in identical packaging. The switching frequency is 52kHz, lower than the original 150kHz specification. Operating temperature range extends to -40°C to 125°C, providing superior thermal performance. Input voltage range is 7V to 40V. This option is recommended for new designs or applications requiring extended component lifecycle support.

Both substitutes are ROHS3 compliant and carry EAR99 ECCN classification, matching the original part's regulatory status.

Frequently Asked Questions (FAQ)

Q: Can AP1501-12K5G-13 or LM2576D2TR4-012G be used as direct replacements for AP3003S-12TRE1?

A: Yes. Both substitute parts provide identical 12V fixed output at 3A in the same TO-263-6 D2PAK package. Pin configuration and thermal characteristics are compatible for direct board-level substitution.

Q: What is the primary difference between the two substitute options?

A: AP1501-12K5G-13 maintains the original 150kHz switching frequency and Diodes Incorporated manufacturer lineage. LM2576D2TR4-012G operates at 52kHz and is currently in Active production status, offering superior long-term availability. The onsemi part also provides extended operating temperature range (-40°C to 125°C versus -20°C to 85°C).

Q: Are there input voltage compatibility considerations?

A: The original AP3003S-12TRE1 requires 15V to 32V input. AP1501-12K5G-13 accepts 4.5V to 40V input, and LM2576D2TR4-012G accepts 7V to 40V input. Both substitutes accommodate the original input range and extend it further, providing design flexibility.

Q: Does switching frequency affect circuit design?

A: Switching frequency impacts output filter component selection and EMI characteristics. The original and AP1501-12K5G-13 both operate at 150kHz. LM2576D2TR4-012G operates at 52kHz, which may require output filter recalculation for equivalent ripple voltage performance. Existing filter designs optimized for 150kHz may require adjustment when using the onsemi part.

Q: What is the MSL (Moisture Sensitivity Level) for these parts?

A: AP3003S-12TRE1 and AP1501-12K5G-13 both carry MSL 3 (168 Hours). LM2576D2TR4-012G carries MSL 1 (Unlimited), indicating superior moisture resistance and less stringent storage requirements.

Q: Which substitute is recommended for new designs?

A: LM2576D2TR4-012G is recommended for new designs due to Active production status, extended operating temperature range, and superior moisture sensitivity rating. AP1501-12K5G-13 is suitable for legacy design continuity or when 150kHz switching frequency is a critical requirement.