SK36-TP Equivalent & Substitute Parts

Part Overview

The SK36-TP is a Schottky rectifier diode manufactured by Micro Commercial Co, rated for 60 V DC reverse voltage and 3 A average rectified current in a surface mount SMC (DO-214AB) package. This component is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design requirements and procurement needs. Equivalent parts maintain identical or superior electrical and mechanical specifications, while substitute parts offer functional alternatives within acceptable parameter ranges for the application.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	60	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	750 mV @ 3 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	500	µA @ 60 V
Technology	Schottky	—
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55°C ~ 150°C	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SK36-TP is determined by the following critical parameters:

Voltage Rating (Vr): The reverse voltage must equal or exceed 60 V. Parts rated at 50 V are acceptable only in applications where the maximum reverse voltage does not approach 60 V.

Current Rating (Io): The average rectified current must equal or exceed 3 A. Parts rated at 5 A or higher are direct substitutes with improved current handling capability.

Forward Voltage (Vf): Forward voltage drop at rated current affects power dissipation. Values between 700 mV and 750 mV at 3 A are functionally equivalent.

Package and Mounting: All substitutes must use DO-214AB (SMC) surface mount package to ensure mechanical and thermal compatibility with existing PCB layouts.

Technology: All substitutes employ Schottky rectifier technology with fast recovery characteristics (≤ 500ns).

Compliance: RoHS3 compliance is required for new designs; non-compliant parts are identified for legacy applications only.

Substitutes are grouped into three categories: direct electrical equivalents (matching 60 V, 3 A specifications), higher-current alternatives (5 A rated), and lower-voltage alternatives (50 V rated).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Reverse Leakage @ Vr [µA]	Tj (Max) [°C]	Product Status	RoHS Status
SK36-TP	Micro Commercial Co	60	3	750 @ 3A	500 @ 60V	150	Obsolete	ROHS3 Compliant
B350-13-F	Diodes Incorporated	50	3	700 @ 3A	500 @ 50V	125	Active	ROHS3 Compliant
B360-13-F	Diodes Incorporated	60	3	700 @ 3A	500 @ 60V	150	Active	ROHS3 Compliant
CDBC360-G	Comchip Technology	60	3	700 @ 3A	500 @ 60V	125	Active	ROHS3 Compliant
SK36/TR13	Microsemi Corporation	60	3	750 @ 3A	500 @ 60V	125	Active	RoHS non-compliant
STPS3L60S	STMicroelectronics	60	3	700 @ 3A	55 @ 60V	150	Active	ROHS3 Compliant
STPS3L60SY	STMicroelectronics	60	3	700 @ 3A	55 @ 60V	150	Active	ROHS3 Compliant
STPS5L60S	STMicroelectronics	60	5	520 @ 5A	220 @ 60V	150	Active	ROHS3 Compliant
STPS5L60SY	STMicroelectronics	60	5	520 @ 5A	220 @ 60V	150	Active	ROHS3 Compliant
SK36-AU_R1_000A1	Panjit International Inc.	60	3	750 @ 3A	100 @ 60V	150	Active	ROHS3 Compliant
SK36_R1_00001	Panjit International Inc.	60	3	750 @ 3A	100 @ 60V	150	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Electrical Equivalents (60 V, 3 A):

B360-13-F (Diodes Incorporated), STPS3L60S (STMicroelectronics), STPS3L60SY (STMicroelectronics), SK36-AU_R1_000A1 (Panjit International Inc.), and SK36_R1_00001 (Panjit International Inc.) are direct replacements for the SK36-TP. All maintain 60 V reverse voltage and 3 A current ratings with identical package specifications. All are ROHS3 compliant and active products. B360-13-F offers the lowest forward voltage (700 mV) and is available in high volume (50,200 pcs). STPS3L60S and STPS3L60SY feature reduced reverse leakage (55 µA versus 500 µA), improving efficiency in low-current applications. STPS3L60SY carries automotive-grade qualification (AEC-Q101 equivalent through Series Q designation). Panjit parts SK36-AU_R1_000A1 and SK36_R1_00001 maintain identical forward voltage to the original (750 mV) with reduced reverse leakage (100 µA).

Higher-Current Alternatives (60 V, 5 A):

STPS5L60S and STPS5L60SY (STMicroelectronics) are rated for 5 A average rectified current, providing 67% higher current capacity than the SK36-TP. These parts are suitable for applications requiring increased current margin or where thermal management benefits from lower forward voltage (520 mV at 5 A). Both are ROHS3 compliant and active. STPS5L60SY includes automotive-grade qualification.

Lower-Voltage Alternative (50 V, 3 A):

B350-13-F (Diodes Incorporated) is rated for 50 V reverse voltage with 3 A current. This part is suitable only for applications where the maximum reverse voltage does not approach 60 V. It offers lower forward voltage (700 mV) and is ROHS3 compliant.

Legacy Compatibility:

SK36/TR13 (Microsemi Corporation) maintains identical electrical specifications (60 V, 3 A, 750 mV forward voltage) but is RoHS non-compliant. This part is restricted to legacy applications where RoHS compliance is not required.

CDBC360-G (Comchip Technology) provides 60 V, 3 A specifications with 700 mV forward voltage and is ROHS3 compliant. Operating temperature maximum is 125°C, which is 25°C lower than the SK36-TP; thermal design review is required for high-temperature applications.

Frequently Asked Questions (FAQ)

Q: Can B350-13-F (50 V) be used as a direct replacement for SK36-TP (60 V)?

A: B350-13-F is a lower-voltage alternative suitable only for applications where the maximum reverse voltage remains below 50 V. If the circuit design requires 60 V reverse voltage capability, B350-13-F is not acceptable. For full voltage compatibility, select B360-13-F, STPS3L60S, STPS3L60SY, or Panjit equivalents.

Q: What is the difference between STPS3L60S and STPS3L60SY?

A: Both parts are electrically identical (60 V, 3 A, 700 mV forward voltage, 55 µA reverse leakage). STPS3L60SY carries automotive-grade qualification (Series Q designation) and operates over -40°C to 150°C, compared to STPS3L60S which specifies 150°C maximum. STPS3L60SY is required for automotive applications; STPS3L60S is suitable for industrial and consumer applications.

Q: Are STPS5L60S and STPS5L60SY pin-compatible with SK36-TP?

A: Yes. All parts use DO-214AB (SMC) surface mount package with identical pinout and footprint. STPS5L60S and STPS5L60SY are mechanically and electrically compatible. The 5 A rating provides higher current capacity; forward voltage is lower (520 mV at 5 A versus 750 mV at 3 A), resulting in reduced power dissipation in high-current circuits.

Q: Why does SK36-TP show as obsolete while SK36-AU_R1_000A1 and SK36_R1_00001 are active?

A: SK36-TP is the original Micro Commercial Co part number, now obsolete. SK36-AU_R1_000A1 and SK36_R1_00001 are Panjit International Inc. variants of the same base product (SK36) with identical electrical specifications. Panjit maintains active production of this design, making these parts suitable for new designs and ongoing procurement.

Q: What is the significance of reverse leakage current differences (500 µA versus 55 µA versus 100 µA)?

A: Reverse leakage current affects power dissipation and circuit performance at maximum reverse voltage. Lower leakage (55 µA in STPS3L60S/STPS3L60SY) reduces standby power consumption and heat generation. Higher leakage (500 µA in SK36-TP and B360-13-F) is acceptable in applications where reverse voltage is not continuously applied or where thermal margin is adequate. Selection depends on circuit duty cycle and thermal design requirements.

Q: Is RoHS3 compliance mandatory for all new designs?

A: RoHS3 compliance is required for products sold in the European Union and many other markets. All recommended substitutes except SK36/TR13 are ROHS3 compliant. SK36/TR13 is restricted to legacy applications where RoHS compliance is not a requirement. For new designs, select from ROHS3-compliant alternatives: B360-13-F, STPS3L60S, STPS3L60SY, STPS5L60S, STPS5L60SY, SK36-AU_R1_000A1, or SK36_R1_00001.

Q: Can forward voltage differences (700 mV versus 750 mV) affect circuit performance?

A: Forward voltage differences of 50 mV at 3 A represent a 7% variation in voltage drop. In rectifier circuits, this affects power dissipation and heat generation. Lower forward voltage (700 mV in B360-13-F, STPS3L60S, STPS3L60SY, CDBC360-G) reduces power loss by approximately 150 mW at 3 A continuous current. For thermal-sensitive applications, lower forward voltage parts improve efficiency. For general applications, both values are functionally equivalent.

Q: What packaging options are available for SK36-TP substitutes?

A: All substitutes use DO-214AB (SMC) surface mount package. Packaging formats vary: B360-13-F, STPS3L60S, STPS5L60S are supplied in Cut Tape (CT) & Digi-Reel®; B350-13-F, SK36-AU_R1_000A1, SK36_R1_00001 are supplied in Tape & Reel (TR); CDBC360-G is supplied in Tape & Reel (TR); SK36/TR13 and STPS3L60SY, STPS5L60SY have unspecified packaging formats. Verify packaging compatibility with assembly equipment and procurement requirements before final selection.

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