SS24HR5G Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS24HR5G is a 40V, 2A Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation in DO-214AA (SMB) surface mount package. This component is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design requirements and production continuity. The part carries automotive-grade qualification (AEC-Q101) and ROHS3 compliance, making it suitable for automotive and industrial applications requiring fast recovery rectification.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Maximum	40	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) Maximum @ If	500 mV @ 2 A	mV @ A
Current - Reverse Leakage @ Vr	400	µA @ 40 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Technology	Schottky	—
Package / Case	DO-214AA, SMB	—
Operating Temperature - Junction	-55 to 125	°C
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SS24HR5G is determined by strict equivalence across the following critical parameters:

Parametric Equivalents (identical electrical and mechanical specifications):

Voltage rating: 40V DC reverse
Current rating: 2A average rectified
Forward voltage: 500 mV @ 2A
Reverse leakage: 400 µA @ 40V
Package: DO-214AA (SMB) surface mount
Speed: Fast recovery ≤ 500ns
Temperature range: -55°C to 125°C minimum
Automotive grade and AEC-Q101 qualification

Parts meeting all these criteria are direct replacements with identical electrical performance and mechanical fit.

Similar Parts (compatible voltage and current ratings with package variations or different manufacturers):

Voltage rating: 40V DC reverse
Current rating: 1A to 3A average rectified
Package: DO-214AA (SMB) or DO-214AC (SMA) surface mount
Speed: Fast recovery ≤ 500ns
RoHS3 compliance

Similar parts share the same voltage class and fast recovery characteristics but differ in current capacity or package form factor. Selection depends on circuit current requirements and PCB layout constraints.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) V	Io (A)	Vf (Max) @ If	Ir @ Vr	Package	Temp Range °C	Grade	AEC-Q101	RoHS3	Product Status
SS24HR5G	Taiwan Semiconductor	40	2	500 mV @ 2A	400 µA @ 40V	DO-214AA (SMB)	-55 to 125	Automotive	Yes	Yes	Discontinued
SS24 R5G	Taiwan Semiconductor	40	2	500 mV @ 2A	400 µA @ 40V	DO-214AA (SMB)	-55 to 125	—	—	Yes	Discontinued
SS24H	Taiwan Semiconductor	40	2	500 mV @ 2A	400 µA @ 40V	DO-214AA (SMB)	-55 to 125	Automotive	Yes	Yes	Active
SS24	MDD	40	2	—	500 µA @ 40V	DO-214AC (SMA)	-55 to 125	—	—	Yes	Active
B240-13-F	Diodes Incorporated	40	2	500 mV @ 2A	500 µA @ 40V	DO-214AA (SMB)	-65 to 150	—	—	Yes	Active
B240Q-13-F	Diodes Incorporated	40	2	500 mV @ 2A	500 µA @ 40V	DO-214AA (SMB)	-65 to 150	Automotive	Yes	Yes	Active
B240A-13-F	Diodes Incorporated	40	2	500 mV @ 2A	500 µA @ 40V	DO-214AC (SMA)	-65 to 150	—	—	Yes	Active
5819SMJ/TR13	Microchip Technology	40	1	550 mV @ 1A	1 mA @ 40V	DO-214AA (SMB)	-55 to 150	—	—	No	Active
B140BQ-13-F	Diodes Incorporated	40	1	500 mV @ 1A	500 µA @ 40V	DO-214AA (SMB)	-65 to 150	Automotive	Yes	Yes	Active
B340BQ-13-F	Diodes Incorporated	40	3	500 mV @ 3A	500 µA @ 40V	DO-214AA (SMB)	-55 to 150	Automotive	Yes	Yes	Active
B340LB-E3/52T	Vishay General Semiconductor	40	3	450 mV @ 3A	400 µA @ 40V	DO-214AA (SMB)	-65 to 150	—	—	Yes	Active

Engineering Selection Recommendations

Direct Replacement (Parametric Equivalent):

SS24H is the primary direct replacement for SS24HR5G. Both parts are manufactured by Taiwan Semiconductor Corporation with identical electrical specifications (40V, 2A, 500 mV forward voltage, 400 µA reverse leakage) and the same DO-214AA package. SS24H carries active product status, automotive grade qualification, and AEC-Q101 certification. The part is available in Tape & Reel packaging with 8,688 units in stock, providing supply continuity for production requirements.

Alternative Direct Replacement (Package Variation):

B240Q-13-F manufactured by Diodes Incorporated provides equivalent electrical performance (40V, 2A, 500 mV forward voltage) in DO-214AA package with automotive grade and AEC-Q101 qualification. This part has active status and extended operating temperature range (-65°C to 150°C). B240Q-13-F is suitable for applications where the extended temperature range provides additional design margin.

Package-Compatible Alternatives (SMA Package):

B240A-13-F and SS24 (MDD) both provide 40V, 2A Schottky rectification in DO-214AC (SMA) package. These parts are electrically equivalent to the main part but require PCB layout modification due to different package form factor. Both parts have active status and ROHS3 compliance. Selection depends on PCB footprint availability and design flexibility.

Current-Rated Alternatives:

B140BQ-13-F (1A rating) and B340BQ-13-F (3A rating) are available for applications where the 2A rating of the SS24HR5G exceeds or falls short of circuit requirements. Both parts maintain 40V voltage rating, fast recovery characteristics, automotive grade, and AEC-Q101 qualification with active product status.

Non-Recommended Substitutes:

5819SMJ/TR13 (Microchip Technology) does not meet compliance requirements for automotive applications due to RoHS non-compliance status, despite matching voltage and package specifications.

Frequently Asked Questions (FAQ)

Q: Can SS24H be used as a direct replacement for SS24HR5G?

A: Yes. SS24H is a parametric equivalent with identical voltage (40V), current (2A), forward voltage (500 mV @ 2A), reverse leakage (400 µA @ 40V), and package (DO-214AA). Both parts carry automotive grade and AEC-Q101 qualification. The primary difference is product status: SS24H is active while SS24HR5G is discontinued.

Q: What is the difference between DO-214AA and DO-214AC packages?

A: DO-214AA (SMB) and DO-214AC (SMA) are different surface mount package form factors for Schottky diodes. DO-214AA is larger than DO-214AC. Parts using these packages are not mechanically interchangeable and require different PCB footprints. Electrical performance is independent of package selection.

Q: Can B240-13-F replace SS24HR5G in automotive applications?

A: B240-13-F provides equivalent electrical specifications (40V, 2A, 500 mV forward voltage) and DO-214AA package compatibility. However, B240-13-F does not carry automotive grade designation in the provided specifications. For automotive applications requiring AEC-Q101 certification, B240Q-13-F is the appropriate Diodes Incorporated alternative, which includes automotive grade and AEC-Q101 qualification.

Q: Why is reverse leakage current different between SS24HR5G and some substitute parts?

A: Reverse leakage current (Ir) is a manufacturing parameter that varies between manufacturers and product lines. SS24HR5G specifies 400 µA @ 40V, while many Diodes Incorporated alternatives specify 500 µA @ 40V. Both values are within acceptable ranges for Schottky rectifier applications. Higher reverse leakage does not prevent substitution if circuit design accommodates the specified maximum value.

Q: Can I use B340BQ-13-F (3A) instead of SS24HR5G (2A)?

A: Yes, from an electrical standpoint. B340BQ-13-F has higher current capacity (3A vs. 2A) and identical voltage rating (40V). The part is suitable for circuits designed for 2A operation, as it provides additional current margin. However, verify that the application does not depend on the specific forward voltage or reverse leakage characteristics of the 2A device.

Q: What does AEC-Q101 qualification mean?

A: AEC-Q101 is an automotive electronics council qualification standard for discrete semiconductors. It certifies that the component meets reliability and performance requirements for automotive applications, including temperature cycling, thermal shock, and long-term stability testing. Parts carrying AEC-Q101 qualification are suitable for automotive-grade designs.

Q: Is ROHS3 compliance required for my application?

A: ROHS3 compliance is mandatory for products sold in the European Union and many other markets. All recommended direct replacements (SS24H, B240Q-13-F, B240A-13-F) carry ROHS3 compliance. If your application requires ROHS3 certification, avoid 5819SMJ/TR13, which is RoHS non-compliant.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Cut Tape and Tape & Reel are different supply formats for surface mount components. Tape & Reel is continuous reel packaging suitable for high-volume automated assembly. Cut Tape is individual tape segments suitable for lower-volume or manual assembly. Electrical and mechanical specifications are identical; packaging format affects procurement and assembly processes only.

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