FS1A-TP General Purpose Rectifier Diode Equivalent & Substitute Parts

Part Overview

The FS1A-TP is a general purpose rectifier diode manufactured by Micro Commercial Co, rated for 50 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (SMA) package. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design requirements and procurement needs. The FS1A-TP operates across a junction temperature range of -50°C to 150°C and features fast recovery characteristics with a reverse recovery time of 150 ns, making it suitable for standard rectification applications requiring moderate voltage and current ratings.

Substiute Parts

FS1A-TP

Micro Commercial CoIn Stock: 972FS1A-TP Datasheet

Current PartRFQ

FR1A

Diotec SemiconductorIn Stock: 3189FR1A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete FS1A-TP is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Voltage - DC Reverse (Vr) (Max): 50 V
• Current - Average Rectified (Io): 1 A
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
• Reverse Recovery Time (trr): 150 ns
• Current - Reverse Leakage @ Vr: 5 µA @ 50 V
• Operating Temperature - Junction: -50°C to 150°C

Mechanical Equivalence Criteria:

• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount

The FR1A manufactured by Diotec Semiconductor satisfies all specified electrical and mechanical parameters, establishing it as a direct functional equivalent for the FS1A-TP. Both components share identical voltage ratings, current ratings, recovery characteristics, and thermal operating ranges. The FR1A maintains active product status and ROHS3 compliance, supporting long-term availability and regulatory conformance.

Parameter Comparison

Engineering Selection Recommendations

The FR1A from Diotec Semiconductor is the direct substitute for the obsolete FS1A-TP. Selection of the FR1A is supported by the following factors:

Compliance and Regulatory Status: The FR1A maintains ROHS3 compliance, matching the regulatory posture of the original FS1A-TP. This ensures continued adherence to environmental and hazardous substance restrictions applicable to electronic component procurement.

Product Availability: The FR1A holds active product status with documented inventory availability (3102 pieces in stock), providing reliable long-term sourcing compared to the obsolete FS1A-TP. Active status indicates ongoing manufacturer support and production continuity.

Electrical and Thermal Equivalence: All critical electrical parameters—reverse voltage rating, average rectified current, recovery time, reverse leakage current, and operating temperature range—are identical between the FS1A-TP and FR1A. This equivalence ensures functional interchangeability in existing circuit designs without modification to PCB layouts or schematic designs.

Package Compatibility: Both components utilize the DO-214AC (SMA) surface mount package, enabling direct PCB footprint compatibility and eliminating the need for assembly process changes.

Frequently Asked Questions (FAQ)

Q: Can the FR1A be used as a direct replacement for the FS1A-TP without circuit modifications?

A: Yes. The FR1A meets all electrical and mechanical specifications of the FS1A-TP, including voltage rating (50 V), current rating (1 A), recovery time (150 ns), and package type (DO-214AC, SMA). Direct substitution on existing PCBs is supported.

Q: What is the primary reason for substituting the FS1A-TP?

A: The FS1A-TP is classified as obsolete. The FR1A provides an active, equivalent alternative with ongoing manufacturer support and documented availability.

Q: Are there differences in forward voltage characteristics between the FS1A-TP and FR1A?

A: The FR1A specifies a maximum forward voltage of 1.3 V @ 1 A. This parameter was not provided for the FS1A-TP in the available documentation. Both components operate within the same voltage and current class, and forward voltage differences within this specification range do not affect functional rectification performance in standard applications.

Q: Do both components require the same moisture sensitivity handling?

A: The FS1A-TP specifies Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating no moisture sensitivity restrictions. The FR1A specifies MSL as Not Applicable, also indicating no moisture sensitivity restrictions. Both components can be handled using standard storage and assembly practices.

Q: Is the FR1A available in the same packaging format as the FS1A-TP?

A: Yes. Both components use the DO-214AC (SMA) surface mount package. The FR1A is supplied in Tape & Reel (TR) format, which is standard for high-volume surface mount assembly and is compatible with automated pick-and-place equipment.

Q: Are there any compliance or certification differences between the two parts?

A: Both the FS1A-TP and FR1A are ROHS3 compliant. The FR1A includes REACH compliance information available upon request. These certifications ensure regulatory conformance for applications subject to environmental and hazardous substance restrictions.