SK1535-TP Schottky Diode Equivalent & Substitute Parts

Part Overview

The SK1535-TP is a Schottky rectifier diode manufactured by Micro Commercial Co, rated for 35V DC reverse voltage and 15A average rectified current in a DO-214AB surface mount package. This component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and production continuity. The part operates across a junction temperature range of -55°C to 125°C and complies with RoHS3 and REACH regulations.

Substiute Parts

SK1535-TP

Micro Commercial CoIn Stock: 729SK1535-TP Datasheet

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HSM835J/TR13

Microchip TechnologyIn Stock: 884HSM835J/TR13 Datasheet

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LSM335J/TR13

Microchip TechnologyIn Stock: 1173LSM335J/TR13 Datasheet

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LSM535J/TR13

Microchip TechnologyIn Stock: 753LSM535J/TR13 Datasheet

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LSM835J/TR13

Microchip TechnologyIn Stock: 957LSM835J/TR13 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SK1535-TP is determined by the following critical parameters: voltage rating (35V DC reverse), package type (DO-214AB surface mount), technology (Schottky), and fast recovery speed characteristics (≤ 500ns). The substitute parts listed maintain identical voltage ratings and package configurations. However, current ratings vary across the substitute options, ranging from 3A to 8A, which are lower than the original 15A specification. Selection of a substitute part requires verification that the application's current demand does not exceed the substitute part's rated average rectified current. All substitute parts maintain the same fast recovery speed classification and operate within compatible temperature ranges.

Parameter Comparison

Engineering Selection Recommendations

The SK1535-TP is obsolete and no direct equivalent with identical 15A current rating is available among the active substitute parts. The Microchip Technology LSM835J/TR13 and HSM835J/TR13 represent the highest current-rated alternatives at 8A, providing the closest functional match within the active product portfolio. Both maintain the 35V voltage rating, DO-214AB package, and fast recovery speed characteristics.

LSM835J/TR13 is preferred for applications where RoHS compliance is not a design requirement, as it offers lower forward voltage (520 mV @ 8A) and lower reverse leakage current (2 mA @ 35V) compared to HSM835J/TR13 (620 mV @ 8A, 250 µA @ 35V). LSM835J/TR13 also supports extended junction temperature operation to 150°C.

HSM835J/TR13 provides the widest operating temperature range (-55°C to 175°C) and the lowest reverse leakage current (250 µA @ 35V), making it suitable for high-temperature or low-leakage applications.

For applications with current requirements below 8A, LSM535J/TR13 (5A) and LSM335J/TR13 (3A) are available as lower-current alternatives, both maintaining the 35V rating and fast recovery characteristics.

All substitute parts are manufactured by Microchip Technology and carry active product status. None of the substitute parts achieve RoHS3 compliance; all are RoHS non-compliant. REACH status remains unaffected across all alternatives.

Frequently Asked Questions (FAQ)

Q: Can LSM835J/TR13 or HSM835J/TR13 directly replace SK1535-TP in all applications?

A: Direct replacement is limited by current rating. The SK1535-TP is rated for 15A average rectified current, while both LSM835J/TR13 and HSM835J/TR13 are rated for 8A. These substitutes are suitable only for applications where the actual current demand does not exceed 8A. Circuit redesign or parallel configuration may be required for higher current applications.

Q: What is the difference between LSM835J/TR13 and HSM835J/TR13?

A: Both parts share identical voltage rating (35V), current rating (8A), package (DO-214AB), and speed characteristics. Key differences are: LSM835J/TR13 has forward voltage of 520 mV @ 8A and reverse leakage of 2 mA @ 35V with maximum junction temperature of 150°C; HSM835J/TR13 has forward voltage of 620 mV @ 8A, reverse leakage of 250 µA @ 35V, and maximum junction temperature of 175°C. HSM835J/TR13 exhibits lower reverse leakage and higher temperature capability.

Q: Are the substitute parts available in the same packaging format as SK1535-TP?

A: All substitute parts are supplied in Tape & Reel (TR) packaging, while the original SK1535-TP packaging format is not specified in the provided data. All parts use identical DO-214AB surface mount package configuration, ensuring mechanical compatibility on PCBs designed for the original part.

Q: What is the impact of RoHS compliance differences?

A: The SK1535-TP is RoHS3 compliant, while all substitute parts (LSM335J/TR13, LSM535J/TR13, LSM835J/TR13, HSM835J/TR13) are RoHS non-compliant. Applications subject to RoHS3 regulatory requirements cannot use these substitutes without design modification or regulatory exemption documentation.

Q: How do forward voltage characteristics compare across substitute options?

A: Forward voltage varies with current rating. LSM335J/TR13 (3A) exhibits 520 mV @ 3A; LSM535J/TR13 (5A) exhibits 520 mV @ 5A; LSM835J/TR13 (8A) exhibits 520 mV @ 8A; HSM835J/TR13 (8A) exhibits 620 mV @ 8A. The original SK1535-TP exhibits 550 mV @ 15A. Forward voltage increases with current demand and varies by manufacturer design.

Q: Can lower-rated parts like LSM335J/TR13 or LSM535J/TR13 be used in parallel to achieve higher current capacity?

A: Parallel configuration of Schottky diodes requires careful thermal and current distribution analysis. The provided data does not include thermal resistance or current sharing characteristics necessary for parallel operation evaluation. Such configurations require detailed thermal modeling and are outside the scope of this substitution reference.