SK102-TP Equivalent & Substitute Parts

Part Overview

The SK102-TP is a Schottky rectifier diode manufactured by Micro Commercial Co, rated for 20V DC reverse voltage and 10A average rectified current in a surface mount DO-214AB package. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design requirements and procurement needs. The SK102-TP provides fast recovery characteristics suitable for high-frequency switching applications requiring low forward voltage drop.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	20 V
Current - Average Rectified (Io)	10 A
Voltage - Forward (Vf) (Max) @ If	650 mV @ 10 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	1 mA @ 20 V
Capacitance @ Vr, F	500pF @ 4V, 1MHz
Package / Case	DO-214AB, SMC
Operating Temperature - Junction	-55°C ~ 125°C
Technology	Schottky
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution of the SK102-TP is determined by the following critical electrical and mechanical parameters:

Mandatory Compatibility Criteria:

Technology: Schottky rectifier diode
Package / Case: DO-214AB (SMC)
Mounting Type: Surface Mount
Current - Average Rectified (Io): 10A minimum
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Allowable Parameter Variations:

Voltage - DC Reverse (Vr) (Max): Equal to or greater than 20V
Voltage - Forward (Vf) (Max) @ If: Equal to or lower than 650 mV @ 10A
Current - Reverse Leakage @ Vr: Equal to or lower than 1 mA @ 20V
Operating Temperature - Junction: Equal to or greater than -55°C ~ 125°C range
Capacitance @ Vr, F: Equal to or lower than 500pF @ 4V, 1MHz

The SK1045-LTP meets all mandatory compatibility criteria and operates within allowable parameter variations, qualifying as a direct substitute for the obsolete SK102-TP.

Parameter Comparison

Parameter	SK102-TP (Main Part)	SK1045-LTP (Substitute)	Compatibility
Manufacturer	Micro Commercial Co	Micro Commercial Co	Same
Technology	Schottky	Schottky	Compatible
Voltage - DC Reverse (Vr) (Max)	20 V	45 V	Compatible (higher rating)
Current - Average Rectified (Io)	10 A	10 A	Identical
Voltage - Forward (Vf) (Max) @ If	650 mV @ 10 A	550 mV @ 10 A	Compatible (lower forward voltage)
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Identical
Current - Reverse Leakage @ Vr	1 mA @ 20 V	200 µA @ 45 V	Compatible (lower leakage)
Capacitance @ Vr, F	500pF @ 4V, 1MHz	500pF @ 4V, 1MHz	Identical
Package / Case	DO-214AB, SMC	DO-214AB, SMC	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Operating Temperature - Junction	-55°C ~ 125°C	-55°C ~ 150°C	Compatible (extended range)
Product Status	Obsolete	Active	Substitute is active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Compatible

Engineering Selection Recommendations

The SK1045-LTP is the manufacturer-recommended substitute for the obsolete SK102-TP. Selection of the SK1045-LTP is based on the following engineering factors:

Product Status: The SK102-TP is classified as obsolete, while the SK1045-LTP maintains active product status with established supply chain availability (8185 pieces in stock).

Compliance & Certifications: Both parts maintain ROHS3 compliance. The SK1045-LTP additionally carries REACH Unaffected status and EAR99 ECCN classification, providing regulatory clarity for international applications.

Electrical Performance: The SK1045-LTP provides superior electrical characteristics within the same package footprint. The 45V reverse voltage rating exceeds the 20V requirement, providing design margin. The forward voltage drop of 550 mV at 10A is lower than the 650 mV specification of the SK102-TP, reducing power dissipation. Reverse leakage current is significantly lower at 200 µA compared to 1 mA.

Thermal Performance: The extended operating temperature range of -55°C to 150°C (versus -55°C to 125°C) accommodates broader environmental conditions.

Packaging & Mounting: Identical DO-214AB package and surface mount configuration ensure direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the SK1045-LTP be used as a direct replacement for the SK102-TP without PCB modifications?

A: Yes. Both parts use identical DO-214AB surface mount packages with matching pin configurations and footprints. No PCB layout changes are required.

Q: What is the significance of the higher 45V rating on the SK1045-LTP compared to the 20V rating of the SK102-TP?

A: The higher voltage rating provides design margin and protection against voltage transients. In applications where the maximum reverse voltage does not exceed 20V, the SK1045-LTP operates safely with additional headroom. This does not negatively impact circuit performance.

Q: How does the lower forward voltage drop of the SK1045-LTP affect circuit operation?

A: The SK1045-LTP exhibits 550 mV forward voltage drop at 10A compared to 650 mV for the SK102-TP. This 100 mV reduction decreases power dissipation and heat generation, improving overall circuit efficiency. This characteristic is beneficial in all applications.

Q: Are there any compatibility concerns with the SK1045-LTP in existing SK102-TP designs?

A: No compatibility concerns exist. The SK1045-LTP meets or exceeds all electrical and mechanical parameters of the SK102-TP. The identical package, mounting type, current rating, and fast recovery speed ensure functional equivalence.

Q: What is the moisture sensitivity level of the SK1045-LTP?

A: The SK1045-LTP carries MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions during storage or handling.

Q: Why is the SK102-TP classified as obsolete?

A: Obsolescence typically results from manufacturer discontinuation decisions based on market demand, technology evolution, or product line consolidation. The SK1045-LTP represents the active equivalent within the manufacturer's current product portfolio.

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