SK54C Schottky Diode 40V 5A DO-214AB Equivalent & Substitute Parts

Part Overview

The SK54C is an active Schottky rectifier diode rated for 40V DC reverse voltage and 5A average rectified current in a surface mount DO-214AB (SMC) package. Manufactured by Taiwan Semiconductor Corporation, this component is designed for fast recovery applications with switching speeds ≤500ns at currents >200mA. The SK54C is ROHS3 compliant and carries unlimited moisture sensitivity level (MSL 1), making it suitable for standard industrial and commercial applications.

Equivalent and substitute parts are identified based on matching electrical performance parameters, package compatibility, and operational specifications. Alternative sources provide equivalent functionality while maintaining the same voltage and current ratings, forward voltage characteristics, and thermal operating range.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Maximum	40	V
Current - Average Rectified (Io)	5	A
Voltage - Forward (Vf) Maximum @ If	550 mV @ 5 A	mV @ A
Speed - Fast Recovery	≤500ns, >200mA (Io)	ns
Current - Reverse Leakage @ Vr	500	µA @ 40 V
Mounting Type	Surface Mount	—
Package / Case	DO-214AB, SMC	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the SK54C is determined by strict alignment with the following electrical and mechanical criteria:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) Maximum: 40V
Current - Average Rectified (Io): 5A
Voltage - Forward (Vf) Maximum @ If: 550 mV @ 5 A
Speed: Fast Recovery ≤500ns, >200mA (Io)
Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount
Operating Temperature - Junction: -55°C to 150°C minimum
Technology: Schottky
RoHS Status: ROHS3 Compliant

Direct Equivalents match all primary criteria with identical electrical performance and package specifications. These parts are fully interchangeable without circuit modification.

Parametric Equivalents meet all primary electrical and mechanical criteria but may include additional qualifications (such as AEC-Q101 automotive certification) or minor variations in secondary parameters (reverse leakage current, capacitance) that remain within acceptable operating ranges for the application.

Similar Parts share the same package and technology but differ in current rating or other key electrical parameters. These are listed for reference when design flexibility permits derating or when alternative specifications are acceptable.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) V	Io (A)	Vf (Max) @ If (mV)	Ir @ Vr (µA)	Package	Temp Range (°C)	RoHS
SK54C	Taiwan Semiconductor Corporation	40	5	550 @ 5A	500 @ 40V	DO-214AB, SMC	-55 to 150	ROHS3
B540C-13-F	Diodes Incorporated	40	5	550 @ 5A	500 @ 40V	DO-214AB, SMC	-55 to 150	ROHS3
SK54	Good-Ark Semiconductor	40	5	550 @ 5A	200 @ 40V	DO-214AB, SMC	-55 to 150	ROHS3
CDBC540-HF	Comchip Technology	40	5	550 @ 5A	500 @ 40V	DO-214AB, SMC	-50 to 150	ROHS3
B540CQ-13-F	Diodes Incorporated	40	5	550 @ 5A	500 @ 40V	DO-214AB, SMC	-55 to 150	ROHS3
SK54-AU_R1_000A1	Panjit International Inc.	40	5	550 @ 5A	200 @ 40V	DO-214AB, SMC	-55 to 150	ROHS3
SK54_R1_00001	Panjit International Inc.	40	5	550 @ 5A	200 @ 40V	DO-214AB, SMC	-55 to 150	ROHS3
SK54L-TP	Micro Commercial Co	40	5	550 @ 5A	1000 @ 40V	DO-214AB, SMC	-55 to 150	ROHS3
SK54LHE3-TP	Micro Commercial Co	40	5	550 @ 5A	100 @ 40V	DO-214AB, SMC	-55 to 150	ROHS3
B340-13-F	Diodes Incorporated	40	3	500 @ 3A	500 @ 40V	DO-214AB, SMC	-55 to 125	ROHS3

Engineering Selection Recommendations

Direct Equivalents for Unrestricted Substitution:

The following parts are direct equivalents to the SK54C and provide identical electrical and mechanical performance:

B540C-13-F (Diodes Incorporated): Matches all primary parameters with identical voltage, current, forward voltage, and temperature range specifications. Available in Cut Tape and Digi-Reel packaging.
SK54 (Good-Ark Semiconductor): Base product number equivalent with matching voltage and current ratings. Reverse leakage current is lower (200 µA vs. 500 µA), which is acceptable for applications where lower leakage is beneficial. Available in higher inventory quantities (390,100 pcs).

Parametric Equivalents with Automotive Qualification:

The following parts meet all primary electrical and mechanical criteria and include AEC-Q101 automotive qualification:

B540CQ-13-F (Diodes Incorporated): Automotive-grade equivalent with identical electrical specifications. Suitable for automotive and high-reliability applications requiring AEC-Q101 certification.
SK54-AU_R1_000A1 (Panjit International Inc.): Automotive-qualified variant with lower reverse leakage (200 µA). Meets AEC-Q101 requirements for automotive applications.
SK54LHE3-TP (Micro Commercial Co): Automotive-qualified part with superior reverse leakage performance (100 µA @ 40V). Includes capacitance specification (200pF @ 4V, 1MHz). Suitable for precision applications requiring low leakage characteristics.

Parametric Equivalents for Standard Applications:

SK54_R1_00001 (Panjit International Inc.): Meets all primary criteria with lower reverse leakage (200 µA). Suitable for general-purpose rectification applications.
CDBC540-HF (Comchip Technology): Equivalent performance with slightly reduced minimum junction temperature (-50°C vs. -55°C). Suitable for applications not requiring the full -55°C lower temperature range.
SK54L-TP (Micro Commercial Co): Meets primary electrical criteria but exhibits higher reverse leakage (1 mA @ 40V). Acceptable for applications where reverse leakage is not a critical parameter.

Similar Part for Current-Derating Applications:

B340-13-F (Diodes Incorporated): 3A rated device with 40V voltage rating. Suitable only for applications where the circuit can operate at reduced current levels (3A maximum). Operating temperature range is limited to -55°C to 125°C.

Selection Basis:

All recommended substitutes maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating. Product status is active for all listed alternatives, ensuring continued availability. Selection should be based on inventory availability, packaging preference (Cut Tape, Digi-Reel, or Tape & Reel), and application-specific requirements such as automotive qualification or reverse leakage specifications.

Frequently Asked Questions (FAQ)

Q: Can B540C-13-F be used as a direct replacement for SK54C?

A: Yes. B540C-13-F is a direct equivalent with identical voltage (40V), current (5A), forward voltage (550 mV @ 5A), and temperature range (-55°C to 150°C) specifications. Both use the DO-214AB (SMC) package and are ROHS3 compliant. No circuit modification is required.

Q: What is the difference between SK54C and SK54?

A: Both parts share identical voltage (40V), current (5A), forward voltage (550 mV @ 5A), and temperature range specifications. The primary difference is reverse leakage current: SK54C specifies 500 µA @ 40V, while SK54 specifies 200 µA @ 40V. The lower leakage in SK54 is acceptable for all applications where SK54C is used. SK54 is available in significantly higher inventory quantities.

Q: Are automotive-qualified parts (B540CQ-13-F, SK54-AU_R1_000A1, SK54LHE3-TP) required for non-automotive applications?

A: No. Automotive qualification (AEC-Q101) is not required for standard industrial or commercial applications. These parts are offered as options for designs requiring automotive-grade components. All listed parts meet the same electrical and mechanical specifications for the SK54C application.

Q: Can SK54L-TP be used if reverse leakage current is not critical to the application?

A: Yes. SK54L-TP meets all primary electrical parameters (40V, 5A, 550 mV forward voltage, -55°C to 150°C) and uses the same DO-214AB (SMC) package. The higher reverse leakage (1 mA @ 40V vs. 500 µA @ 40V) is acceptable for applications where reverse leakage does not impact circuit performance.

Q: Why is B340-13-F listed as a similar part rather than a direct equivalent?

A: B340-13-F has a reduced current rating (3A vs. 5A) and a narrower operating temperature range (-55°C to 125°C vs. -55°C to 150°C). It is suitable only for applications that can operate at 3A or lower and do not require operation above 125°C junction temperature. Direct substitution is not recommended without circuit derating analysis.

Q: What packaging options are available for SK54C substitutes?

A: Substitute parts are available in three packaging formats: Cut Tape (CT), Digi-Reel, and Tape & Reel (TR). B540C-13-F and SK54 are available in Cut Tape and Digi-Reel. B540CQ-13-F, SK54-AU_R1_000A1, SK54_R1_00001, SK54LHE3-TP, and CDBC540-HF are available in Tape & Reel. SK54L-TP is available in Cut Tape. Select packaging based on assembly equipment and volume requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and carry MSL 1 (unlimited) moisture sensitivity level, matching the SK54C specifications.

Q: Which substitute part has the lowest reverse leakage current?

A: SK54LHE3-TP has the lowest reverse leakage at 100 µA @ 40V, compared to 500 µA @ 40V for the SK54C. This part is automotive-qualified (AEC-Q101) and includes capacitance specification (200pF @ 4V, 1MHz).

Q: Can CDBC540-HF be used in applications requiring -55°C operation?

A: CDBC540-HF specifies a minimum junction temperature of -50°C, not -55°C. It is suitable for applications with a minimum operating temperature of -50°C or higher. For applications requiring full -55°C operation, use B540C-13-F, SK54, B540CQ-13-F, SK54-AU_R1_000A1, SK54_R1_00001, SK54L-TP, or SK54LHE3-TP.

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