SK38B-TP Equivalent & Substitute Parts

Part Overview

The SK38B-TP is a Schottky rectifier diode manufactured by Micro Commercial Co, rated for 80V DC reverse voltage and 3A average rectified current in a surface mount DO-214AA (SMB) package. This component is classified as Obsolete, necessitating identification of equivalent substitute parts for ongoing production and maintenance applications. The SK38B-TP operates across a junction temperature range of -55°C to 125°C and exhibits fast recovery characteristics suitable for high-frequency switching applications.

Substiute Parts

SK38B-TP

Micro Commercial CoIn Stock: 3766SK38B-TP Datasheet

Current PartRFQ

SK38B-LTP

Micro Commercial CoIn Stock: 10768SK38B-LTP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SK38B-TP is determined by electrical and mechanical parameter equivalence within the Schottky diode category. The critical parameters governing substitution are:

Electrical Parameters:

• Voltage - DC Reverse (Vr) (Max): 80 V minimum
• Current - Average Rectified (Io): 3 A minimum
• Voltage - Forward (Vf) (Max) @ If: 850 mV @ 3 A maximum
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: 500 µA @ 80 V maximum

Mechanical Parameters:

• Package / Case: DO-214AA, SMB (surface mount)
• Mounting Type: Surface Mount

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• Technology: Schottky

The SK38B-LTP qualifies as a direct substitute, meeting all electrical specifications and mechanical requirements while maintaining identical package geometry and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The SK38B-LTP serves as a direct electrical and mechanical substitute for the SK38B-TP. Both components share identical electrical specifications across all critical parameters: reverse voltage rating, forward current capacity, forward voltage drop, recovery speed, and reverse leakage current. Package geometry and surface mount configuration are identical, enabling direct PCB layout compatibility without redesign.

The SK38B-LTP provides an extended operating temperature range (-55°C to 150°C versus -55°C to 125°C), offering improved thermal margin in applications approaching the upper temperature limit of the original SK38B-TP specification.

Both parts maintain ROHS3 compliance and identical regulatory status (REACH Unaffected, EAR99 classification). The primary distinction is packaging format: SK38B-TP is supplied in Cut Tape (CT) format, while SK38B-LTP is supplied in Tape & Reel (TR) format. This difference affects procurement and assembly processes but does not impact electrical or mechanical performance.

Both components carry restricted product status designations (Obsolete and Not For New Designs, respectively), indicating limited long-term availability. For new designs, evaluation of current-generation Schottky diodes with equivalent electrical specifications is recommended.

Frequently Asked Questions (FAQ)

Q: Can SK38B-LTP replace SK38B-TP in existing designs?

A: Yes. The SK38B-LTP is electrically and mechanically equivalent to the SK38B-TP. All critical electrical parameters (voltage rating, current capacity, forward voltage, recovery speed, leakage current) are identical. Package geometry (DO-214AA, SMB) and mounting type (surface mount) are identical, enabling direct substitution without circuit redesign or PCB layout modification.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Cut Tape (CT) packaging supplies components on continuous tape that is cut into individual segments for manual or semi-automated assembly. Tape & Reel (TR) packaging supplies components on continuous tape wound on a reel, optimized for high-speed automated assembly equipment. Both formats contain identical components; the difference is in procurement and assembly process compatibility.

Q: Does the SK38B-LTP's higher temperature rating affect substitution?

A: No. The SK38B-LTP's extended operating temperature range (-55°C to 150°C) is a superset of the SK38B-TP specification (-55°C to 125°C). This provides additional thermal margin and does not create compatibility issues. Applications operating within the original SK38B-TP temperature range function identically with the SK38B-LTP.

Q: Are there electrical performance differences between these parts?

A: No. Forward voltage drop, reverse voltage rating, average rectified current, recovery speed, and reverse leakage current are identical across both parts. Electrical behavior in circuit operation is equivalent.

Q: What compliance certifications apply to both parts?

A: Both SK38B-TP and SK38B-LTP are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes. Regulatory compliance is equivalent.

Q: Why are both parts marked with restricted status?

A: SK38B-TP is classified as Obsolete, indicating discontinued production. SK38B-LTP is classified as Not For New Designs, indicating limited availability and manufacturer recommendation against use in new product development. Both designations reflect product lifecycle status rather than technical deficiency. For new designs, current-generation Schottky diodes with equivalent electrical specifications should be evaluated.

Q: Can I use these parts interchangeably in high-frequency switching applications?

A: Yes. Both parts meet the fast recovery specification (≤ 500ns, > 200mA) required for high-frequency switching. Recovery speed, forward voltage characteristics, and leakage current are identical, supporting equivalent performance in switching applications.