REG104FA-A/500G3 Equivalent & Substitute Parts

Part Overview

The REG104FA-A/500G3 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 device is currently in Active product status with 680 pieces available in new original inventory. Identifying equivalent and substitute parts becomes necessary when managing supply chain continuity, addressing inventory constraints, or accommodating design revisions while maintaining electrical and mechanical compatibility.

Substiute Parts

REG104FA-A/500G3

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

Current PartRFQ

REG104FA-A/500

Texas InstrumentsIn Stock: 2035REG104FA-A/500 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the REG104FA-A/500G3 is determined by strict electrical and mechanical parameter matching. The primary substitute identified is REG104FA-A/500, which maintains identical electrical specifications across all critical parameters: positive adjustable output configuration, 1A output current, 15V maximum input voltage, 1.295V to 5.5V adjustable output range, 0.58V maximum dropout voltage, identical quiescent current, PSRR rating, control and protection features, and operating temperature range. Both devices utilize the same TO-263 (DDPAK-5) package with Surface Mount technology and meet ROHS3 compliance and MSL 2 requirements.

The key parameters determining substitution eligibility are:

• Output Configuration (Positive)
• Output Type (Adjustable)
• Voltage specifications (Input Max, Output Min/Max, Dropout)
• Current ratings (Output, Quiescent)
• Package type (TO-263 DDPAK-5)
• Mounting technology (Surface Mount)
• Environmental and compliance certifications

Parameter Comparison

Engineering Selection Recommendations

The REG104FA-A/500 qualifies as a direct parametric equivalent to the REG104FA-A/500G3 based on complete electrical and mechanical specification alignment. Both devices are ROHS3 compliant and carry identical MSL 2 ratings, ensuring equivalent environmental performance and handling requirements.

The primary distinction between these parts is product status and packaging format. The REG104FA-A/500G3 maintains Active status with bulk packaging, while the REG104FA-A/500 is designated Last Time Buy with Tape & Reel packaging. The Last Time Buy status indicates this part is being phased out by the manufacturer, making it suitable only for applications where existing inventory can be secured and utilized before discontinuation. The Tape & Reel packaging of the substitute is advantageous for automated assembly processes, whereas bulk packaging of the main part may be preferred for manual or lower-volume operations.

Selection between these parts should be based on supply chain requirements, production volume, and inventory planning. The Active status REG104FA-A/500G3 is recommended for new designs and long-term production commitments. The REG104FA-A/500 may be selected when existing inventory is available and production timelines align with Last Time Buy constraints.

Frequently Asked Questions (FAQ)

Q: Can REG104FA-A/500 be used as a direct replacement for REG104FA-A/500G3 in existing designs?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters. They share the same TO-263 (DDPAK-5) package, pinout, electrical ratings, and performance characteristics. No circuit modifications are required for substitution.

Q: What is the difference between bulk and Tape & Reel packaging?

A: Bulk packaging contains loose components suitable for manual handling and lower-volume assembly. Tape & Reel packaging presents components in a continuous tape format compatible with automated pick-and-place assembly equipment. Both packaging formats contain identical components with the same electrical specifications and performance.

Q: Why is REG104FA-A/500 marked as Last Time Buy?

A: Last Time Buy designation indicates the manufacturer is discontinuing this part number. Existing inventory may be available, but no future production is planned. This status requires careful supply chain planning to ensure adequate stock before the part becomes unavailable.

Q: Are there any compliance or environmental differences between these parts?

A: No. Both parts are ROHS3 compliant and carry identical Moisture Sensitivity Level 2 ratings. They meet the same environmental and regulatory requirements and are suitable for equivalent applications.

Q: What should be considered when selecting between these two part numbers?

A: Selection depends on supply chain strategy and production requirements. Choose REG104FA-A/500G3 (Active status) for new designs and ongoing production. Choose REG104FA-A/500 (Last Time Buy) only when existing inventory is confirmed available and production schedules align with the discontinuation timeline.