REG104FA-A/500E3 Equivalent & Substitute Parts

Part Overview

The REG104FA-A/500E3 is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. This Surface Mount device delivers 1A output current in a TO-263 (DDPAK-5) package and operates across an input voltage range up to 15V with adjustable output from 1.295V to 5.5V. The part is classified as Obsolete, making identification of equivalent and substitute parts essential for ongoing design support and procurement continuity.

Substiute Parts

REG104FA-A/500E3

Texas InstrumentsIn Stock: 1062REG104FA-A/500E3 Datasheet

Current PartRFQ

REG104FA-A/500

Texas InstrumentsIn Stock: 2035REG104FA-A/500 Datasheet

Parametric EquivalentRFQ

REG104FA-A/500G3

Texas InstrumentsIn Stock: 721REG104FA-A/500G3 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the REG104FA-A/500E3 are identified based on strict parametric equivalence across all critical electrical and mechanical specifications. The substitution logic is based on the following key parameters that must remain identical:

• Output Configuration: Positive
• Output Type: Adjustable
• Number of Regulators: 1
• Voltage - Input (Max): 15V
• Voltage - Output (Min/Fixed): 1.295V
• Voltage - Output (Max): 5.5V
• Current - Output: 1A
• Voltage Dropout (Max): 0.58V @ 1A
• Current - Quiescent (Iq): 0.7 mA
• PSRR: 65dB (120Hz)
• Control Features: Enable
• Protection Features: Over Current, Over Temperature
• Operating Temperature: -40°C ~ 85°C
• Package / Case: TO-263-6, D2PAK (5 Leads + Tab), TO-263BA

All identified substitutes maintain these parameters without deviation, ensuring direct functional and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

REG104FA-A/500G3 is the preferred substitute for new designs and ongoing procurement. This part maintains Active product status with full manufacturer support and carries identical electrical and mechanical specifications to the REG104FA-A/500E3. All three parts are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.

REG104FA-A/500 is available as a secondary option with Last Time Buy status, suitable for applications requiring immediate availability from existing inventory. This part is functionally equivalent but represents a transitional product status.

The REG104FA-A/500E3 original part number is classified as Obsolete and should not be selected for new designs or long-term production requirements.

Frequently Asked Questions (FAQ)

Q: Can REG104FA-A/500G3 directly replace REG104FA-A/500E3 in existing designs?

A: Yes. REG104FA-A/500G3 is a direct parametric equivalent with identical electrical performance, output characteristics, protection features, and TO-263 package configuration. No circuit modifications are required.

Q: What is the difference between REG104FA-A/500E3 and REG104FA-A/500?

A: Both parts are parametrically identical. The primary difference is packaging format: REG104FA-A/500E3 uses standard packaging while REG104FA-A/500 is supplied in Tape & Reel (TR) format. REG104FA-A/500E3 is Obsolete; REG104FA-A/500 is Last Time Buy.

Q: Why is REG104FA-A/500G3 recommended over REG104FA-A/500?

A: REG104FA-A/500G3 maintains Active product status with ongoing manufacturer support and availability. REG104FA-A/500 is Last Time Buy, indicating limited future availability.

Q: Are all three parts compatible with the same PCB layout?

A: Yes. All three parts use identical TO-263-6 (D2PAK with 5 Leads + Tab) package configuration, ensuring mechanical and electrical compatibility on the same PCB footprint.

Q: Do these parts meet current environmental compliance standards?

A: Yes. All three parts are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements for electronic components.

Q: What is the moisture sensitivity level for these parts?

A: All three parts carry MSL 2 (1 Year) rating, requiring standard moisture control during storage and handling per IPC standards.