SK15-TP Equivalent & Substitute Parts

Part Overview

The SK15-TP is a Schottky 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-214AA (SMB) package. This component is classified as Obsolete, indicating it is no longer in active production. Identification of equivalent and substitute parts is necessary to support ongoing maintenance, repair, and redesign activities for applications currently utilizing this diode.

Key Parameters

Parameter	Value
Manufacturer Part Number	SK15-TP
Manufacturer	Micro Commercial Co
Category	Diodes, Rectifiers
Technology	Schottky
Voltage - DC Reverse (Vr) (Max)	50 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	720 mV @ 1 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 50 V
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the SK15-TP is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 50 V
Current - Average Rectified (Io): Must equal or exceed 1 A
Voltage - Forward (Vf) (Max) @ If: Must not exceed 720 mV @ 1 A
Speed: Must maintain Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr: Must not exceed 500 µA @ 50 V

Mechanical Compatibility Criteria:

Package / Case: Must be DO-214AA or SMB equivalent
Mounting Type: Must be Surface Mount
Operating Temperature - Junction: Must support -55°C ~ 125°C range

Compliance Criteria:

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

Substitute parts are grouped into two categories: Parametric Equivalents (identical electrical specifications) and Similar parts (meeting minimum electrical requirements with acceptable variations in secondary parameters).

Parameter Comparison

Parameter	SK15-TP	SK15-LTP	SK15-TP (SMBSR105)	B150B-13-F	MBRS140T3G
Manufacturer	Micro Commercial Co	Micro Commercial Co	Micro Commercial Co	Diodes Incorporated	onsemi
Product Status	Obsolete	Not For New Designs	Active	Active	Active
Voltage - DC Reverse (Vr) (Max)	50 V	50 V	50 V	50 V	40 V
Current - Average Rectified (Io)	1 A	1 A	1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	720 mV @ 1 A	720 mV @ 1 A	720 mV @ 1 A	700 mV @ 1 A	600 mV @ 1 A
Speed	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 50 V	500 µA @ 50 V	500 µA @ 50 V	500 µA @ 50 V	1 mA @ 40 V
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-65°C ~ 150°C	-65°C ~ 125°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Parametric Equivalents (Preferred for Direct Replacement):

SK15-TP (SMBSR105) is the recommended primary substitute. This part maintains identical electrical specifications to the SK15-TP while carrying Active product status, ensuring long-term availability and supply chain stability. All critical parameters—voltage rating, current capacity, forward voltage, recovery speed, and reverse leakage—are identical. Operating temperature range and compliance certifications are equivalent.

SK15-LTP is a secondary parametric equivalent with identical electrical specifications. However, this part carries Not For New Designs status, limiting its suitability for new applications. It remains acceptable for maintenance and repair of existing systems.

Similar Parts (Acceptable Substitutes with Parameter Variations):

B150B-13-F (Diodes Incorporated) meets all minimum electrical requirements with Active product status. This part offers improved forward voltage performance (700 mV vs. 720 mV @ 1 A) and extended operating temperature range (-65°C ~ 150°C vs. -55°C ~ 125°C). The higher capacitance specification (110 pF @ 4 V, 1 MHz) may affect high-frequency performance in sensitive applications.

MBRS140T3G (onsemi) is suitable only for applications where the 50 V reverse voltage rating is not a critical requirement. This part is rated for 40 V maximum reverse voltage, representing a 10 V reduction from the SK15-TP specification. Forward voltage performance is superior (600 mV @ 1 A). Reverse leakage current is higher (1 mA @ 40 V vs. 500 µA @ 50 V). Active product status ensures availability. This substitute is appropriate only when circuit design permits operation at reduced voltage margins.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage processes.

Frequently Asked Questions (FAQ)

Q: Can SK15-TP be directly replaced with SK15-TP (SMBSR105)?

A: Yes. SK15-TP (SMBSR105) is a parametric equivalent with identical electrical specifications and Active product status. Direct substitution is supported without circuit modification.

Q: What is the difference between SK15-LTP and SK15-TP (SMBSR105)?

A: Both parts are parametric equivalents with identical electrical specifications. The primary difference is product status: SK15-TP (SMBSR105) is Active, while SK15-LTP is Not For New Designs. For new applications, SK15-TP (SMBSR105) is preferred. For maintenance of existing systems, SK15-LTP is acceptable.

Q: Can B150B-13-F replace SK15-TP in all applications?

A: B150B-13-F meets all minimum electrical requirements and is suitable for most applications. The improved forward voltage (700 mV vs. 720 mV @ 1 A) and extended temperature range (-65°C ~ 150°C) provide additional design margin. However, the higher capacitance (110 pF vs. unspecified for SK15-TP) may affect performance in high-frequency switching applications. Circuit-level evaluation is required for applications sensitive to junction capacitance.

Q: Is MBRS140T3G a suitable substitute for SK15-TP?

A: MBRS140T3G is suitable only for applications where the 50 V reverse voltage rating is not critical. This part is rated for 40 V maximum reverse voltage, representing a 10 V reduction. It offers superior forward voltage performance (600 mV @ 1 A) and is in Active production status. Use this substitute only when circuit design permits operation at reduced voltage margins.

Q: Are all substitute parts available in the same package?

A: Yes. All substitute parts use the DO-214AA (SMB) surface mount package, ensuring mechanical and thermal compatibility with the original SK15-TP footprint.

Q: Do substitute parts meet the same compliance requirements as SK15-TP?

A: Yes. All substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original SK15-TP specifications.

Q: What is the primary reason to substitute SK15-TP?

A: SK15-TP is classified as Obsolete, indicating discontinued production. Substitution is necessary to maintain supply continuity for repair and maintenance activities. SK15-TP (SMBSR105) is the recommended replacement due to identical specifications and Active product status.

Q: Can multiple substitute parts be used interchangeably in the same design?

A: Parametric equivalents (SK15-TP (SMBSR105) and SK15-LTP) are fully interchangeable. Similar parts (B150B-13-F and MBRS140T3G) introduce parameter variations that may affect circuit performance. Use of multiple substitute parts in the same design requires circuit-level analysis to confirm compatibility with application requirements.

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