SK38A-TP Equivalent & Substitute Parts

Part Overview

The SK38A-TP is a Schottky rectifier diode manufactured by Micro Commercial Co, rated for 80V DC reverse voltage and 3A average rectified current in a DO-214AC surface mount package. This component is classified as Obsolete, indicating it is no longer in active production. Locating equivalent substitute parts is necessary to support ongoing maintenance, repair, and legacy system requirements where this diode specification remains applicable.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	80 V
Current - Average Rectified (Io)	3 A
Voltage - Forward (Vf) (Max) @ If	850 mV @ 3 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 80 V
Package / Case	DO-214AC, SMA
Mounting Type	Surface Mount
Operating Temperature - Junction	-50°C ~ 125°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SK38A-TP is determined by electrical and mechanical parameter equivalence within the Schottky rectifier diode category. The critical parameters governing substitution are:

Electrical Parameters:

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

Mechanical Parameters:

Package / Case: DO-214AC, SMA
Mounting Type: Surface Mount
Operating Temperature - Junction: -50°C ~ 125°C

Compliance Parameters:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

The SK38A-LTP qualifies as a direct substitute, sharing identical electrical ratings and package specifications. The primary distinction is packaging format: SK38A-TP is supplied in Cut Tape (CT), while SK38A-LTP is supplied in Tape & Reel (TR).

Parameter Comparison

Parameter	SK38A-TP (Main Part)	SK38A-LTP (Substitute)
Manufacturer	Micro Commercial Co	Micro Commercial Co
Technology	Schottky	Schottky
Voltage - DC Reverse (Vr) (Max)	80 V	80 V
Current - Average Rectified (Io)	3 A	3 A
Voltage - Forward (Vf) (Max) @ If	850 mV @ 3 A	850 mV @ 3 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 80 V	500 µA @ 80 V
Package / Case	DO-214AC, SMA	DO-214AC, SMA
Mounting Type	Surface Mount	Surface Mount
Operating Temperature - Junction	-50°C ~ 125°C	-50°C ~ 125°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Not For New Designs
Packaging Format	Cut Tape (CT)	Tape & Reel (TR)

Engineering Selection Recommendations

The SK38A-LTP is electrically and mechanically equivalent to the SK38A-TP. Both components meet ROHS3 compliance and carry MSL 1 (Unlimited) moisture sensitivity ratings, ensuring compatibility with standard surface mount assembly processes.

Selection between these parts is determined by packaging requirements:

SK38A-TP (Cut Tape): Suitable for low-volume applications, repair operations, and component-level procurement where individual or small quantities are required.

SK38A-LTP (Tape & Reel): Appropriate for production assembly environments requiring bulk component quantities and automated pick-and-place equipment integration.

Both parts share the same base product number (SK38) and are manufactured by Micro Commercial Co. The SK38A-LTP carries a "Not For New Designs" status, indicating it remains available for legacy system support but is not recommended for new product development. The SK38A-TP is classified as Obsolete, reflecting its discontinuation from active manufacturing.

Frequently Asked Questions (FAQ)

Q: Can SK38A-LTP be used as a direct replacement for SK38A-TP?

A: Yes. Both parts are electrically identical with matching voltage ratings (80V), current ratings (3A), forward voltage characteristics (850mV @ 3A), and fast recovery speed specifications. The physical package (DO-214AC, SMA) and mounting type (Surface Mount) are identical. The only difference is the supply format: Cut Tape versus Tape & Reel.

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

A: Cut Tape (CT) packaging supplies components on tape that has been cut into smaller sections, typically used for manual handling and low-volume applications. Tape & Reel (TR) packaging supplies components on continuous tape wound on a reel, designed for automated assembly equipment and high-volume production. Both formats contain the same component in the same package.

Q: Are there any compliance differences between SK38A-TP and SK38A-LTP?

A: No. Both parts are ROHS3 Compliant, carry MSL 1 (Unlimited) ratings, and share identical REACH and ECCN classifications. They are fully interchangeable from a regulatory and environmental compliance perspective.

Q: Why is SK38A-TP classified as Obsolete?

A: Obsolete status indicates the part is no longer manufactured by Micro Commercial Co. The SK38A-LTP, classified as "Not For New Designs," represents the available alternative for legacy system support. Both parts remain functionally equivalent for applications requiring 80V, 3A Schottky rectifier diodes.

Q: Can these diodes be used interchangeably in PCB assembly?

A: Yes, provided the PCB design accommodates the DO-214AC (SMA) package footprint. Both SK38A-TP and SK38A-LTP use identical package geometry and mounting specifications. Assembly process differences relate only to equipment compatibility with the respective tape formats.

Q: What are the key electrical parameters that define substitution eligibility?

A: Substitution is determined by matching: Voltage - DC Reverse (80V), Current - Average Rectified (3A), Voltage - Forward (850mV @ 3A), Speed (Fast Recovery ≤ 500ns), and Current - Reverse Leakage (500µA @ 80V). Any deviation in these parameters disqualifies a part as a direct substitute.

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