SK24-TP Schottky Diode Equivalent & Substitute Parts

Part Overview

The SK24-TP is a Schottky rectifier diode manufactured by Micro Commercial Co, rated for 40 V DC reverse voltage and 2 A average rectified current in a DO-214AA (SMB) surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The SK24-TP features fast recovery characteristics suitable for high-frequency switching applications with a maximum forward voltage of 550 mV at 2 A.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	40 V
Current - Average Rectified (Io)	2 A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 2 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 40 V
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 125°C
Technology	Schottky
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SK24-TP are grouped based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

Critical Parameters for Substitution:

Voltage - DC Reverse (Vr) (Max): 40 V or higher
Current - Average Rectified (Io): 2 A or higher
Package / Case: DO-214AA, SMB (surface mount compatibility)
Technology: Schottky
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type: Surface Mount

Substitution Categories:

Direct Electrical Equivalents (40 V, 2 A): Parts meeting all critical parameters with identical voltage and current ratings. These include B240-13-F, B240Q-13-F, SS24T3G, SS24B, and SS24B-HF. These parts maintain the same electrical performance envelope as the SK24-TP.

Automotive-Qualified Equivalents (40 V, 2 A): B240Q-13-F qualifies as an automotive-grade equivalent with AEC-Q101 certification, offering enhanced reliability for automotive applications while maintaining identical electrical specifications.

Higher Voltage Alternatives (50 V, 2 A): B250Q-13 and B250Q-13-F provide increased voltage headroom at 50 V while maintaining 2 A current rating. These are suitable for applications requiring higher reverse voltage margin and include automotive qualification (AEC-Q101).

Higher Current Alternative (40 V, 3 A): B340LB-E3/5BT provides increased current capacity at 3 A while maintaining 40 V voltage rating. This part is suitable for applications requiring higher current handling with the same voltage specification.

Lower Current Alternative (40 V, 1 A): STPS140UY operates at 40 V with reduced current rating of 1 A. This part includes automotive qualification and is suitable for lower-current applications within the same voltage class.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Speed	Ir @ Vr	Package	Temp Range	Product Status	Automotive Grade
SK24-TP	Micro Commercial Co	40 V	2 A	550 mV @ 2 A	≤ 500ns	500 µA @ 40 V	DO-214AA, SMB	-55°C ~ 125°C	Obsolete	No
B240-13-F	Diodes Incorporated	40 V	2 A	500 mV @ 2 A	≤ 500ns	500 µA @ 40 V	DO-214AA, SMB	-65°C ~ 150°C	Active	No
B240Q-13-F	Diodes Incorporated	40 V	2 A	500 mV @ 2 A	≤ 500ns	500 µA @ 40 V	DO-214AA, SMB	-65°C ~ 150°C	Active	Yes (AEC-Q101)
B250Q-13	Diodes Incorporated	50 V	2 A	700 mV @ 2 A	≤ 500ns	500 µA @ 50 V	DO-214AA, SMB	-65°C ~ 150°C	Active	Yes (AEC-Q101)
B250Q-13-F	Diodes Incorporated	50 V	2 A	700 mV @ 2 A	≤ 500ns	500 µA @ 50 V	DO-214AA, SMB	-65°C ~ 150°C	Active	Yes (AEC-Q101)
B340LB-E3/5BT	Vishay General Semiconductor - Diodes Division	40 V	3 A	450 mV @ 3 A	≤ 500ns	400 µA @ 40 V	DO-214AA, SMB	-65°C ~ 150°C	Active	No
SS24T3G	onsemi	40 V	2 A	500 mV @ 2 A	≤ 500ns	400 µA @ 40 V	DO-214AA, SMB	-55°C ~ 150°C	Active	No
STPS140UY	STMicroelectronics	40 V	1 A	650 mV @ 2 A	≤ 500ns	12 µA @ 40 V	DO-214AA, SMB	-40°C ~ 150°C	Active	Yes (Automotive)
SS24B	MDD	40 V	2 A	550 mV @ 2 A	Not specified	Not specified	DO-214AA, SMB	-50°C ~ 125°C	Active	No
SS24B-HF	Comchip Technology	40 V	2 A	550 mV @ 2 A	≤ 500ns	500 µA @ 40 V	DO-214AA, SMB	-55°C ~ 125°C	Active	No

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

B240-13-F, B240Q-13-F, SS24T3G, SS24B-HF, and SS24B are direct electrical equivalents to the SK24-TP, all rated for 40 V and 2 A. All substitute parts are active products with ROHS3 compliance and MSL 1 rating. B240-13-F and SS24T3G offer extended operating temperature ranges (-65°C to 150°C and -55°C to 150°C respectively) compared to the SK24-TP (-55°C to 125°C). B240Q-13-F provides automotive-grade qualification (AEC-Q101) with identical electrical specifications, suitable for applications requiring automotive reliability standards.

For Automotive Applications:

B240Q-13-F is the recommended substitute for automotive applications, providing AEC-Q101 qualification while maintaining 40 V, 2 A electrical specifications. B250Q-13 and B250Q-13-F offer higher voltage rating (50 V) with automotive qualification, suitable for designs requiring increased voltage margin. Both are active products with extended temperature ranges.

For Higher Current Requirements:

B340LB-E3/5BT provides 3 A current capacity at 40 V, suitable for applications requiring increased current handling. This part features lower forward voltage (450 mV @ 3 A) and reduced reverse leakage (400 µA @ 40 V) compared to the SK24-TP.

For Higher Voltage Applications:

B250Q-13 and B250Q-13-F operate at 50 V with 2 A rating, providing increased reverse voltage margin. Both include automotive qualification and extended temperature ranges.

For Lower Current Applications:

STPS140UY operates at 40 V with 1 A rating and includes automotive qualification. This part features significantly reduced reverse leakage (12 µA @ 40 V) compared to the SK24-TP.

All recommended substitutes maintain DO-214AA (SMB) package compatibility, surface mount configuration, fast recovery characteristics, and ROHS3 compliance with the SK24-TP.

Frequently Asked Questions (FAQ)

Q: Can B240-13-F directly replace SK24-TP in all applications?

A: B240-13-F is electrically equivalent to SK24-TP with identical 40 V and 2 A ratings, fast recovery speed, and DO-214AA package. B240-13-F is an active product with extended temperature range (-65°C to 150°C) and improved availability. Packaging differs (Cut Tape & Digi-Reel vs. Tape & Reel), but both are surface mount compatible.

Q: What is the difference between B240Q-13-F and B240-13-F?

A: Both parts are electrically identical at 40 V, 2 A with identical forward voltage and reverse leakage specifications. B240Q-13-F includes automotive-grade qualification (AEC-Q101) and is supplied in Tape & Reel packaging, while B240-13-F is supplied in Cut Tape & Digi-Reel packaging. Select B240Q-13-F for automotive applications requiring AEC-Q101 certification.

Q: Why would I choose B250Q-13-F over B240Q-13-F?

A: B250Q-13-F provides higher reverse voltage rating (50 V vs. 40 V) while maintaining 2 A current and automotive qualification (AEC-Q101). Select B250Q-13-F for applications requiring increased voltage margin or operating in higher voltage environments. Forward voltage is higher (700 mV @ 2 A vs. 500 mV @ 2 A).

Q: Is SS24T3G suitable for the SK24-TP application?

A: SS24T3G is electrically equivalent to SK24-TP with identical 40 V, 2 A ratings and fast recovery characteristics in DO-214AA package. SS24T3G is an active onsemi product with extended temperature range (-55°C to 150°C) and higher inventory availability. Packaging is Cut Tape & Digi-Reel rather than Tape & Reel.

Q: Can B340LB-E3/5BT be used as a substitute?

A: B340LB-E3/5BT operates at 40 V with higher current capacity (3 A vs. 2 A). This part is suitable only if the application can tolerate higher current rating. B340LB-E3/5BT features lower forward voltage (450 mV @ 3 A) and reduced reverse leakage (400 µA @ 40 V). Use only if current rating increase is acceptable for the circuit design.

Q: What is the significance of the DO-214AA package designation?

A: DO-214AA is the industry standard package designation for SMB (Surface Mount Body) Schottky diodes. All substitute parts listed maintain DO-214AA package compatibility with SK24-TP, ensuring mechanical and electrical compatibility on PCB layouts designed for the original part.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all substitute parts listed are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the SK24-TP compliance profile. All parts are suitable for standard PCB assembly and storage conditions.

Q: Which substitute offers the best reverse leakage performance?

A: STPS140UY provides the lowest reverse leakage at 12 µA @ 40 V, significantly lower than SK24-TP (500 µA @ 40 V). However, STPS140UY is rated for 1 A current, suitable only for lower-current applications. For 2 A applications, B340LB-E3/5BT offers reduced leakage (400 µA @ 40 V) compared to SK24-TP.

Q: What temperature range should I consider for my application?

A: SK24-TP operates from -55°C to 125°C. Most active substitutes extend this range to -65°C to 150°C, providing improved thermal margin. STPS140UY operates from -40°C to 150°C. Select based on application temperature requirements and thermal design margins.

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