SK84L-TP Schottky Diode Equivalent & Substitute Parts

Part Overview

The SK84L-TP is a 40V, 8A Schottky rectifier diode manufactured by Micro Commercial Co in a surface mount SMC (DO-214AB) package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. The diode is designed for fast recovery applications with a maximum forward voltage of 650 mV at 8A and reverse leakage of 1 mA at 40V. Due to its discontinued status, equivalent and substitute parts from active product lines are necessary for ongoing production support and new design alternatives.

Substiute Parts

SK84L-TP

Micro Commercial CoIn Stock: 4214SK84L-TP Datasheet

Current PartRFQ

SK84LHE3-TP

Micro Commercial CoIn Stock: 3659SK84LHE3-TP Datasheet

Parametric EquivalentRFQ

B340-13-F

Diodes IncorporatedIn Stock: 51481B340-13-F Datasheet

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SL44-E3/57T

Vishay General Semiconductor - Diodes DivisionIn Stock: 4003SL44-E3/57T Datasheet

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SL44-E3/9AT

Vishay General Semiconductor - Diodes DivisionIn Stock: 2006SL44-E3/9AT Datasheet

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STPS340S

STMicroelectronicsIn Stock: 50815STPS340S Datasheet

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STPS340SY

STMicroelectronicsIn Stock: 12677STPS340SY Datasheet

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STPS3L40S

STMicroelectronicsIn Stock: 2738STPS3L40S Datasheet

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STPS3L40SY

STMicroelectronicsIn Stock: 2861STPS3L40SY Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SK84L-TP is determined by the following critical parameters:

Voltage Rating: All substitute parts must maintain a minimum DC reverse voltage (Vr) of 40V to ensure equivalent reverse bias protection.

Current Rating: The primary distinction between direct equivalents and similar alternatives is the average rectified current (Io). The SK84L-TP is rated for 8A. Direct parametric equivalents maintain this 8A rating, while similar alternatives are rated at lower current levels (3A or 4A) and are suitable only for applications with reduced current requirements.

Package and Mounting: All listed substitutes use the DO-214AB (SMC) surface mount package, ensuring mechanical and thermal compatibility with the original design.

Technology and Speed: All substitutes employ Schottky technology with fast recovery characteristics (≤ 500ns, > 200mA), maintaining switching performance equivalent to the original part.

Compliance: RoHS3 compliance is maintained across all substitutes. Automotive-grade variants with AEC-Q101 qualification are available for applications requiring automotive reliability standards.

Forward Voltage: Forward voltage characteristics vary slightly among substitutes but remain within acceptable ranges for Schottky rectifier applications at their respective current ratings.

Parameter Comparison

Engineering Selection Recommendations

Direct Parametric Equivalent (8A Rating):

The SK84LHE3-TP is the only substitute that maintains the full 8A current rating of the SK84L-TP. This part is manufactured by the same supplier (Micro Commercial Co) and is in Active product status. The SK84LHE3-TP features improved reverse leakage characteristics (100 µA versus 1 mA) and includes AEC-Q101 automotive qualification, making it suitable for both commercial and automotive applications requiring the original 8A specification.

Similar Alternatives (3A to 4A Ratings):

For applications where the full 8A current capacity is not required, the following active alternatives are available:

The SL44-E3/57T and SL44-E3/9AT (Vishay General Semiconductor) provide 4A current capacity with lower forward voltage (440 mV @ 4A) compared to the original part. These are suitable for moderate-current applications and are available in both cut tape and tape & reel packaging options.

The STPS340S, STPS340SY, STPS3L40S, and STPS3L40SY (STMicroelectronics) provide 3A current capacity. The STPS340SY and STPS3L40SY variants include AEC-Q101 automotive qualification and extended operating temperature ranges (-40°C to 150°C), making them appropriate for automotive and industrial applications. The STPS3L40S and STPS3L40SY variants feature lower forward voltage (500 mV @ 3A) and reduced reverse leakage (100 µA), providing improved efficiency characteristics.

The B340-13-F (Diodes Incorporated) provides 3A current capacity with 500 mV forward voltage and is available in cut tape and digi-reel packaging.

Compliance Considerations:

All listed substitutes maintain RoHS3 compliance and REACH unaffected status, consistent with the original SK84L-TP. Automotive-grade variants (SK84LHE3-TP, STPS340SY, STPS3L40SY) carry AEC-Q101 qualification for applications requiring automotive reliability standards.

Frequently Asked Questions (FAQ)

Q: Can the SK84LHE3-TP directly replace the SK84L-TP in existing designs?

A: Yes. The SK84LHE3-TP is a direct parametric equivalent with identical voltage (40V) and current (8A) ratings, the same DO-214AB package, and equivalent fast recovery characteristics. The primary differences are improved reverse leakage performance and active product status with automotive qualification.

Q: What is the difference between the SL44-E3/57T and SL44-E3/9AT?

A: Both parts are identical in electrical specifications (40V, 4A, 440 mV forward voltage). The primary difference is packaging: SL44-E3/57T is supplied in cut tape and digi-reel format, while SL44-E3/9AT is supplied in tape & reel format. Selection depends on assembly equipment compatibility and procurement requirements.

Q: Can I use a 3A-rated substitute in place of the 8A SK84L-TP?

A: Only if the application circuit operates at or below 3A average rectified current. Using a lower-rated device in a circuit designed for 8A operation will result in device failure. Circuit analysis is required to confirm maximum current requirements before selecting a lower-rated substitute.

Q: What is the significance of the "SY" suffix in STPS340SY and STPS3L40SY?

A: The "SY" suffix indicates automotive-grade qualification with AEC-Q101 certification and extended operating temperature range (-40°C to 150°C). These variants are suitable for automotive and harsh industrial environments. Non-SY variants (STPS340S, STPS3L40S) are suitable for commercial applications with standard operating temperature ranges.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts maintain RoHS3 compliance and REACH unaffected status, consistent with the original SK84L-TP.

Q: What is the difference in reverse leakage between the SK84L-TP and SK84LHE3-TP?

A: The SK84L-TP has reverse leakage of 1 mA at 40V, while the SK84LHE3-TP has 100 µA at 40V. The improved leakage performance of the SK84LHE3-TP results in lower standby current and improved efficiency in applications with sustained reverse bias conditions.

Q: Which substitute offers the lowest forward voltage drop?

A: The SL44-E3/57T and SL44-E3/9AT (Vishay) offer the lowest forward voltage at 440 mV @ 4A. The STPS3L40S and STPS3L40SY (STMicroelectronics) offer 500 mV @ 3A. Lower forward voltage reduces power dissipation and heat generation in rectification circuits.

Q: Can I mix different substitute parts in the same circuit board?

A: All listed substitutes share identical package geometry (DO-214AB, SMC) and are mechanically interchangeable. However, electrical performance differences (current rating, forward voltage, reverse leakage) must be evaluated for the specific circuit application. Mixing parts with different current ratings in parallel or series configurations requires circuit analysis to ensure proper current distribution and voltage sharing.

Q: What is the operating temperature range for each substitute?

A: The SK84L-TP and SK84LHE3-TP operate from -55°C to 150°C. Most other substitutes operate from -55°C to 125°C or -40°C to 150°C (automotive variants). Verify the specific operating temperature requirement of your application before selecting a substitute.