SK33-TP Equivalent & Substitute Parts

Part Overview

The SK33-TP is a Schottky rectifier diode rated for 30 V DC reverse voltage and 3 A average rectified current in a surface mount DO-214AB (SMC) package. Manufactured by Micro Commercial Co, this component is classified as Not For New Designs, indicating it has reached end-of-life status. The SK33-TP is supplied in Tape & Reel packaging with RoHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Identification of equivalent and substitute parts is necessary due to the Not For New Designs status of the SK33-TP. Active production alternatives with identical or superior electrical characteristics and compliance certifications are available from multiple manufacturers.

Key Parameters

Parameter	SK33-TP Value	Unit
Voltage - DC Reverse (Vr) (Max)	30	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	500	mV @ 3 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	500	µA @ 30 V
Capacitance @ Vr, F	250	pF @ 4V, 1MHz
Operating Temperature - Junction	-55 to 150	°C
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SK33-TP is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 30 V
Current - Average Rectified (Io): 3 A
Voltage - Forward (Vf) (Max) @ If: 500 mV @ 3 A
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr: 500 µA @ 30 V
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
Technology: Schottky

Acceptable Variations:

Capacitance @ Vr, F: Minor variations permitted (200–250 pF range)
Operating Temperature - Junction: Minimum -55°C and maximum ≥ 125°C required
RoHS Status: ROHS3 Compliant preferred; RoHS non-compliant parts noted separately
Packaging Format: Tape & Reel (TR), Cut Tape (CT), or Bulk acceptable for equivalent function

Substitute parts are grouped into three categories: Direct Manufacturer equivalents (identical electrical and mechanical specifications), Similar parts (minor parameter deviations), and Parametric equivalents (including automotive-grade variants with AEC-Q101 qualification).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Reverse Leakage @ Vr [µA]	Tj (Min–Max) [°C]	Package	RoHS Status	Product Status
SK33-TP	Micro Commercial Co	30	3	500 @ 3 A	500 @ 30 V	-55 to 150	DO-214AB, SMC	ROHS3 Compliant	Not For New Designs
B330-13-F	Diodes Incorporated	30	3	500 @ 3 A	500 @ 30 V	-55 to 125	DO-214AB, SMC	ROHS3 Compliant	Active
SS33-E3/57T	Vishay General Semiconductor - Diodes Division	30	3	500 @ 3 A	500 @ 30 V	-55 to 125	DO-214AB, SMC	ROHS3 Compliant	Active
SS33-E3/9AT	Vishay General Semiconductor - Diodes Division	30	3	500 @ 3 A	500 @ 30 V	-55 to 125	DO-214AB, SMC	ROHS3 Compliant	Active
5821SMJ/TR13	Microchip Technology	30	3	480 @ 3 A	1500 @ 30 V	-55 to 150	DO-214AB, SMC	RoHS non-compliant	Active
SK33/TR13	Microsemi Corporation	30	3	500 @ 3 A	500 @ 30 V	-55 to 125	DO-214AB, SMC	RoHS non-compliant	Active
B330Q-13-F	Diodes Incorporated	30	3	500 @ 3 A	500 @ 30 V	-55 to 150	DO-214AB, SMC	ROHS3 Compliant	Active
SS33	Fairchild Semiconductor	30	3	500 @ 3 A	500 @ 30 V	-55 to 150	DO-214AB, SMC	Not specified	Active
SS33HE3_B/H	Vishay General Semiconductor - Diodes Division	30	3	500 @ 3 A	500 @ 30 V	-55 to 150	DO-214AB, SMC	ROHS3 Compliant	Active
SS33HE3_B/I	Vishay General Semiconductor - Diodes Division	30	3	500 @ 3 A	500 @ 30 V	-55 to 150	DO-214AB, SMC	ROHS3 Compliant	Active

Engineering Selection Recommendations

Primary Substitutes (Direct Equivalents - Active Status, ROHS3 Compliant):

The following parts provide full electrical and mechanical equivalence to the SK33-TP with active product status and RoHS3 compliance:

B330-13-F (Diodes Incorporated): Identical electrical specifications. Operating temperature range -55°C to 125°C. Available in Cut Tape and Digi-Reel packaging. 62,100 units in stock.
SS33-E3/57T (Vishay General Semiconductor - Diodes Division): Identical electrical specifications. Operating temperature range -55°C to 125°C. Available in Tape & Reel. 1,807 units in stock.
SS33-E3/9AT (Vishay General Semiconductor - Diodes Division): Identical electrical specifications. Operating temperature range -55°C to 125°C. Available in Tape & Reel. 14,400 units in stock.

Extended Temperature Range Substitutes (Active Status, ROHS3 Compliant):

The following parts maintain identical electrical specifications with extended operating temperature range to 150°C, matching the SK33-TP upper temperature limit:

B330Q-13-F (Diodes Incorporated): Automotive-grade with AEC-Q101 qualification. Identical electrical specifications. Operating temperature range -55°C to 150°C. Available in Tape & Reel. 823 units in stock.
SS33HE3_B/H (Vishay General Semiconductor - Diodes Division): Automotive-grade with AEC-Q101 qualification. Identical electrical specifications. Operating temperature range -55°C to 150°C. Available in Tape & Reel. 789 units in stock.
SS33HE3_B/I (Vishay General Semiconductor - Diodes Division): Automotive-grade with AEC-Q101 qualification. Identical electrical specifications. Operating temperature range -55°C to 150°C. Available in Tape & Reel. 967 units in stock.

Parametric Equivalent (Active Status, Non-Compliant RoHS):

5821SMJ/TR13 (Microchip Technology): Forward voltage 480 mV @ 3 A (20 mV lower than SK33-TP). Reverse leakage 1.5 mA @ 30 V (3× higher than SK33-TP). Operating temperature range -55°C to 150°C. RoHS non-compliant. Available in Tape & Reel. 870 units in stock. Suitable for applications where RoHS compliance is not required and slightly elevated reverse leakage is acceptable.

Alternative Equivalent (Active Status, Non-Compliant RoHS):

SK33/TR13 (Microsemi Corporation): Identical electrical specifications to SK33-TP. Operating temperature range -55°C to 125°C. RoHS non-compliant. Available in unspecified packaging. 937 units in stock.

General Purpose Equivalent (Active Status):

SS33 (Fairchild Semiconductor): Identical electrical specifications. Operating temperature range -55°C to 150°C. Available in Bulk packaging. 26,200 units in stock. RoHS status not specified.

Frequently Asked Questions (FAQ)

Q: Can B330-13-F replace SK33-TP in all applications?

A: B330-13-F is electrically equivalent with identical voltage, current, and forward voltage specifications. The operating temperature range is -55°C to 125°C, which is 25°C lower than the SK33-TP maximum of 150°C. Substitution is valid for applications where the junction temperature does not exceed 125°C. For applications requiring operation up to 150°C, use B330Q-13-F, SS33HE3_B/H, or SS33HE3_B/I instead.

Q: What is the difference between SS33-E3/57T and SS33-E3/9AT?

A: Both parts are manufactured by Vishay General Semiconductor - Diodes Division with identical electrical specifications (30 V, 3 A, 500 mV forward voltage, 500 µA reverse leakage). The difference is in packaging format: SS33-E3/57T is supplied in Cut Tape & Digi-Reel, while SS33-E3/9AT is supplied in Tape & Reel. Electrical performance is identical; selection depends on assembly process requirements.

Q: Why is 5821SMJ/TR13 listed as a similar substitute rather than a direct equivalent?

A: The 5821SMJ/TR13 has two parameter deviations from the SK33-TP: forward voltage is 480 mV @ 3 A (20 mV lower) and reverse leakage is 1.5 mA @ 30 V (3 times higher than the 500 µA specification). Additionally, it is RoHS non-compliant. These deviations classify it as a parametric equivalent suitable only for applications where these variations are acceptable and RoHS compliance is not required.

Q: Are automotive-grade parts (B330Q-13-F, SS33HE3_B/H, SS33HE3_B/I) necessary for non-automotive applications?

A: Automotive-grade parts with AEC-Q101 qualification undergo additional qualification testing and reliability screening. For non-automotive applications, standard-grade equivalents such as B330-13-F, SS33-E3/57T, or SS33-E3/9AT provide identical electrical performance at potentially lower cost. Automotive-grade selection is driven by application requirements, not by electrical equivalence.

Q: What is the significance of the DO-214AB (SMC) package designation?

A: DO-214AB is the industry-standard package outline for surface mount Schottky diodes in the 3 A class. SMC is the supplier device package designation. All substitute parts listed use the same DO-214AB package, ensuring mechanical and thermal compatibility with existing PCB layouts and assembly processes. No package conversion is required.

Q: Can SK33/TR13 from Microsemi be used as a direct replacement?

A: SK33/TR13 is electrically equivalent with identical specifications (30 V, 3 A, 500 mV forward voltage, 500 µA reverse leakage). However, it is RoHS non-compliant and has an operating temperature range of -55°C to 125°C (25°C lower than SK33-TP). Substitution is valid only for applications where RoHS compliance is not required and junction temperature does not exceed 125°C.

Q: What is the inventory status for each substitute part?

A: B330-13-F has the highest inventory (62,100 units), followed by SS33 (26,200 units) and SS33-E3/9AT (14,400 units). Parts with lower inventory include SS33HE3_B/I (967 units), SK33/TR13 (937 units), B330Q-13-F (823 units), 5821SMJ/TR13 (870 units), SS33HE3_B/H (789 units), and SS33-E3/57T (1,807 units). Inventory levels should be verified with suppliers for production commitments.

Q: Is RoHS3 compliance a critical factor in selecting a substitute?

A: RoHS3 compliance is mandatory for applications subject to European Union Restriction of Hazardous Substances regulations or customer specifications requiring RoHS certification. All primary substitute recommendations (B330-13-F, SS33-E3/57T, SS33-E3/9AT, B330Q-13-F, SS33HE3_B/H, SS33HE3_B/I) are ROHS3 compliant. Non-compliant alternatives (5821SMJ/TR13, SK33/TR13) are listed for reference only and should be used only when RoHS compliance is not a requirement.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message