SSL24HR5G Equivalent & Substitute Parts

Part Overview

The SSL24HR5G is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 40 V DC reverse voltage and 2 A average rectified current in a 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 is RoHS3 compliant, making it suitable for automotive and industrial applications requiring fast recovery Schottky diode performance.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	410 mV @ 2 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	400	µA @ 40 V
Technology	Schottky	—
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 125	°C
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SSL24HR5G is determined by strict equivalence and similarity across the following electrical and mechanical parameters:

Primary Equivalence Criteria:

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

Parametric Equivalents are parts with identical electrical ratings and package specifications. These parts are direct replacements with no derating required.

Similar Parts share the same voltage rating (40 V) and package family (DO-214AA/SMB) but differ in current rating (1 A or 3 A) or forward voltage characteristics. These parts are suitable for applications where the current requirement is lower or higher than the original specification, provided the circuit design accommodates the different electrical characteristics.

Package Variants include parts with the same electrical specifications but different surface mount package designations (SMA vs. SMB), which require PCB layout modification.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Package	Grade	AEC-Q101	RoHS	Product Status
SSL24HR5G	Taiwan Semiconductor	40 V	2 A	410 mV @ 2 A	DO-214AA, SMB	Automotive	Yes	ROHS3	Discontinued
SSL24	Taiwan Semiconductor	40 V	2 A	410 mV @ 2 A	DO-214AA, SMB	—	No	ROHS3	Active
SSL24H	Taiwan Semiconductor	40 V	2 A	410 mV @ 2 A	DO-214AA, SMB	Automotive	Yes	ROHS3	Active
5819SMJ/TR13	Microchip Technology	40 V	1 A	550 mV @ 1 A	DO-214AA, SMB	—	No	Non-compliant	Active
B140BQ-13-F	Diodes Incorporated	40 V	1 A	500 mV @ 1 A	DO-214AA, SMB	Automotive	Yes	ROHS3	Active
B240-13-F	Diodes Incorporated	40 V	2 A	500 mV @ 2 A	DO-214AA, SMB	—	No	ROHS3	Active
B240A-13-F	Diodes Incorporated	40 V	2 A	500 mV @ 2 A	DO-214AC, SMA	—	No	ROHS3	Active
B240Q-13-F	Diodes Incorporated	40 V	2 A	500 mV @ 2 A	DO-214AA, SMB	Automotive	Yes	ROHS3	Active
B340BQ-13-F	Diodes Incorporated	40 V	3 A	500 mV @ 3 A	DO-214AA, SMB	Automotive	Yes	ROHS3	Active
B340LB-E3/52T	Vishay General Semiconductor	40 V	3 A	450 mV @ 3 A	DO-214AA, SMB	—	No	ROHS3	Active
B340LB-E3/5BT	Vishay General Semiconductor	40 V	3 A	450 mV @ 3 A	DO-214AA, SMB	—	No	ROHS3	Active

Engineering Selection Recommendations

Parametric Equivalents (Direct Replacement):

SSL24H is the recommended primary equivalent. This part maintains identical electrical specifications (40 V, 2 A, 410 mV forward voltage) and package configuration (DO-214AA, SMB) as the SSL24HR5G. SSL24H carries automotive-grade qualification and AEC-Q101 certification, matching the original part's compliance profile. Product status is active with substantial inventory availability (6922 pcs).

SSL24 is an alternative parametric equivalent with identical electrical ratings and package. This part is active and available (681 pcs) but lacks automotive-grade designation and AEC-Q101 qualification. Selection of SSL24 is appropriate for non-automotive applications or where automotive qualification is not required.

Similar Parts (Current Rating Variants):

B240Q-13-F is a 2 A Schottky diode at 40 V in DO-214AA, SMB package manufactured by Diodes Incorporated. This part carries automotive-grade qualification and AEC-Q101 certification. Forward voltage is specified at 500 mV @ 2 A, compared to 410 mV @ 2 A for the SSL24HR5G. This 90 mV difference in forward voltage must be evaluated in circuit thermal and efficiency analysis. Product status is active with 20400 pcs available.

B240-13-F is functionally equivalent to B240Q-13-F but supplied in cut tape and Digi-Reel packaging rather than tape and reel. This part lacks automotive-grade designation. Inventory is substantial (65400 pcs).

B340BQ-13-F is a 3 A variant at 40 V in DO-214AA, SMB package. This part is suitable for applications requiring higher current capacity than the original 2 A specification. It carries automotive-grade qualification and AEC-Q101 certification. Forward voltage is 500 mV @ 3 A. Product status is active (35300 pcs available).

Similar Parts (Current Rating Reduction):

B140BQ-13-F is a 1 A Schottky diode at 40 V in DO-214AA, SMB package. This part is suitable only for applications where the circuit current requirement does not exceed 1 A. It carries automotive-grade qualification and AEC-Q101 certification. Forward voltage is 500 mV @ 1 A. Product status is active (6100 pcs available).

5819SMJ/TR13 is a 1 A Schottky diode at 40 V manufactured by Microchip Technology. This part does not carry automotive-grade qualification or AEC-Q101 certification and is RoHS non-compliant. Selection is not recommended for automotive applications or where RoHS compliance is required.

Package Variant:

B240A-13-F is a 2 A Schottky diode at 40 V but in DO-214AC (SMA) package rather than DO-214AA (SMB). This part requires PCB layout modification and is not a direct mechanical replacement. Forward voltage is 500 mV @ 2 A. Product status is active with high inventory (125300 pcs).

Higher Current Alternatives:

B340LB-E3/52T and B340LB-E3/5BT are 3 A Schottky diodes at 40 V manufactured by Vishay General Semiconductor in DO-214AA, SMB package. Forward voltage is 450 mV @ 3 A, which is lower than the SSL24HR5G specification. These parts lack automotive-grade designation and AEC-Q101 certification. Product status is active.

Frequently Asked Questions (FAQ)

Q: Can SSL24 be used as a direct replacement for SSL24HR5G?

A: SSL24 is a parametric equivalent with identical electrical specifications (40 V, 2 A, 410 mV forward voltage) and DO-214AA, SMB package. However, SSL24 lacks automotive-grade designation and AEC-Q101 qualification. For automotive applications requiring these certifications, SSL24H is the appropriate choice. For non-automotive applications, SSL24 is suitable.

Q: What is the difference between SSL24H and SSL24HR5G?

A: SSL24H and SSL24HR5G are parametrically identical in electrical specifications and package. The primary difference is product status: SSL24HR5G is discontinued, while SSL24H is active. SSL24H is the recommended replacement for SSL24HR5G in all applications.

Q: Can B240Q-13-F replace SSL24HR5G?

A: B240Q-13-F is electrically similar with the same 40 V and 2 A ratings and DO-214AA, SMB package. However, forward voltage differs: B240Q-13-F is specified at 500 mV @ 2 A versus 410 mV @ 2 A for SSL24HR5G. This 90 mV difference affects power dissipation and thermal performance. B240Q-13-F carries automotive-grade qualification and AEC-Q101 certification. Circuit thermal analysis is required to confirm suitability.

Q: Why would I select a 3 A part like B340BQ-13-F instead of a 2 A part?

A: Selection of B340BQ-13-F is appropriate when circuit current requirements exceed 2 A. The 3 A rating provides additional margin and thermal headroom. Forward voltage at 3 A is 500 mV. This part carries automotive-grade qualification and AEC-Q101 certification.

Q: Is B240A-13-F compatible with SSL24HR5G?

A: B240A-13-F has identical electrical specifications (40 V, 2 A) but uses DO-214AC (SMA) package instead of DO-214AA (SMB). This is a package variant requiring PCB layout modification. Direct mechanical substitution is not possible without redesign.

Q: What does RoHS3 compliance mean for part selection?

A: RoHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements. All recommended parametric equivalents and most similar parts carry ROHS3 compliance. Parts specified as RoHS non-compliant may not be acceptable for certain applications or markets.

Q: Does AEC-Q101 qualification matter for my application?

A: AEC-Q101 is an automotive electronics qualification standard. If your application is automotive or requires automotive-grade reliability standards, select parts with AEC-Q101 certification. SSL24H, B240Q-13-F, B340BQ-13-F, and B140BQ-13-F all carry this qualification. For non-automotive applications, AEC-Q101 certification is not required.

Q: What is the significance of forward voltage differences between parts?

A: Forward voltage (Vf) determines power dissipation in the diode. SSL24HR5G specifies 410 mV @ 2 A, while many alternatives specify 500 mV @ 2 A. The 90 mV difference results in additional power dissipation and heat generation. Circuit thermal design must accommodate this difference. Lower forward voltage (such as B340LB variants at 450 mV @ 3 A) reduces dissipation but may not be available with required certifications.

Q: Can I use a 1 A part in a 2 A circuit?

A: No. Using a 1 A rated part (such as B140BQ-13-F or 5819SMJ/TR13) in a circuit requiring 2 A operation will cause the diode to exceed its current rating, resulting in excessive heat generation, reduced reliability, and potential failure. Current rating must meet or exceed circuit requirements.

Q: What packaging options are available?

A: The SSL24HR5G uses DO-214AA (SMB) surface mount package. Parametric equivalents maintain this package. B240A-13-F uses DO-214AC (SMA) package, which is physically different and requires PCB modification. Packaging variants are available in cut tape (CT), tape and reel (TR), and Digi-Reel formats, which affect handling and assembly but not electrical performance.

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