AP1184T5-33L-U Equivalent & Substitute Parts

Part Overview

The AP1184T5-33L-U is a linear voltage regulator IC manufactured by Diodes Incorporated, designed to deliver a fixed 3.3V output at 4A in a TO-220-5 package. This through-hole component provides positive fixed output regulation with integrated over-current and over-temperature protection. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications.

Substiute Parts

AP1184T5-33L-U

Diodes IncorporatedIn Stock: 1067AP1184T5-33L-U Datasheet

Current PartRFQ

AP1184T5-33L-U

Diodes IncorporatedIn Stock: 1067AP1184T5-33L-U Datasheet

Parametric EquivalentRFQ

MIC29501-3.3WT

Microchip TechnologyIn Stock: 822MIC29501-3.3WT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AP1184T5-33L-U is determined by the following critical parameters:

• Fixed output voltage of 3.3V
• TO-220-5 package configuration for mechanical and thermal compatibility
• Positive output configuration
• Single regulator topology
• Through-hole mounting type
• Over-current and over-temperature protection

The MIC29501-3.3WT qualifies as a manufacturer-recommended substitute based on matching these core electrical and mechanical specifications. While the substitute offers enhanced performance characteristics (higher output current capability, lower dropout voltage, and extended input voltage range), it maintains full compatibility with the original part's functional requirements and package footprint.

Parameter Comparison

Engineering Selection Recommendations

The MIC29501-3.3WT is the appropriate substitute for the discontinued AP1184T5-33L-U. Both components are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for current production. The substitute maintains identical output voltage and package configuration while providing superior performance margins through higher current capability (5A vs 4A) and lower dropout voltage (0.6V vs 0.85V). The extended input voltage range (26V vs 16V) and expanded operating temperature range (-40°C to 125°C vs 0°C to 125°C) provide additional design flexibility. Enhanced protection features including reverse polarity and transient voltage protection offer improved system robustness. The active product status of the MIC29501-3.3WT ensures long-term availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the MIC29501-3.3WT directly replace the AP1184T5-33L-U in existing designs?

A: Yes. Both components use the TO-220-5 package with identical pinout configuration. The substitute meets or exceeds all electrical specifications of the original part, including output voltage, current capacity, and protection features.

Q: What are the key differences between these two regulators?

A: The MIC29501-3.3WT offers higher output current (5A vs 4A), lower dropout voltage (0.6V vs 0.85V), higher maximum input voltage (26V vs 16V), and extended operating temperature range (-40°C to 125°C vs 0°C to 125°C). Both provide identical 3.3V fixed output in TO-220-5 packages.

Q: Are there any thermal or PCB layout considerations when substituting?

A: The identical TO-220-5 package ensures mechanical compatibility and thermal characteristics remain consistent. Existing PCB layouts require no modification for this substitution.

Q: Does the substitute provide additional protection features?

A: Yes. The MIC29501-3.3WT includes reverse polarity and transient voltage protection in addition to the over-current and over-temperature protection present in the original AP1184T5-33L-U.

Q: Are both parts compliant with current regulatory standards?

A: Both the AP1184T5-33L-U and MIC29501-3.3WT are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.