SS24 R5G Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS24 R5G is a 40V, 2A Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation in DO-214AA (SMB) surface mount package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design support and production requirements. The SS24 R5G operates across a junction temperature range of -55°C to 125°C and is RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

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
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	400 µA @ 40 V	µA @ V
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 125	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SS24 R5G is determined by strict electrical and mechanical parameter matching within the Schottky diode rectifier category. The primary substitution criteria are:

Critical Parameters for Direct Substitution:

Voltage - DC Reverse (Vr) Maximum: 40V
Current - Average Rectified (Io): 2A
Technology: Schottky
Mounting Type: Surface Mount
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)

Package Compatibility:

Direct equivalents maintain DO-214AA (SMB) package
Parametric equivalents may use alternative surface mount packages (SMA/DO-214AC) with identical electrical performance

Compliance Requirements:

RoHS3 compliance required for direct substitution
Operating temperature range must accommodate -55°C to 125°C minimum

Parts are grouped as follows:

Parametric Equivalents: Identical electrical specifications with alternative packaging (SMA package instead of SMB)

Direct Manufacturer Equivalents: Identical electrical and package specifications from alternative manufacturers

Similar Parts: Same voltage and current ratings with minor parameter variations (forward voltage, reverse leakage, temperature range) or different current ratings (1A or 3A variants)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) V	Io (A)	Vf (Max) @ If	Ir @ Vr	Package	Product Status	RoHS Status	Temp Range °C
SS24 R5G	Taiwan Semiconductor Corporation	40	2	500 mV @ 2 A	400 µA @ 40 V	DO-214AA (SMB)	Discontinued	ROHS3	-55 to 125
SS24	MDD	40	2	—	500 µA @ 40 V	DO-214AC (SMA)	Active	ROHS3	-55 to 125
SS24H	Taiwan Semiconductor Corporation	40	2	500 mV @ 2 A	400 µA @ 40 V	DO-214AA (SMB)	Active	ROHS3	-55 to 125
B240A-13-F	Diodes Incorporated	40	2	500 mV @ 2 A	500 µA @ 40 V	DO-214AC (SMA)	Active	ROHS3	-65 to 150
5819SMJ/TR13	Microchip Technology	40	1	550 mV @ 1 A	1 mA @ 40 V	DO-214AA (SMB)	Active	RoHS non-compliant	-55 to 150
B140BQ-13-F	Diodes Incorporated	40	1	500 mV @ 1 A	500 µA @ 40 V	DO-214AA (SMB)	Active	ROHS3	-65 to 150
B240-13-F	Diodes Incorporated	40	2	500 mV @ 2 A	500 µA @ 40 V	DO-214AA (SMB)	Active	ROHS3	-65 to 150
B240Q-13-F	Diodes Incorporated	40	2	500 mV @ 2 A	500 µA @ 40 V	DO-214AA (SMB)	Active	ROHS3	-65 to 150
B340BQ-13-F	Diodes Incorporated	40	3	500 mV @ 3 A	500 µA @ 40 V	DO-214AA (SMB)	Active	ROHS3	-55 to 150
B340LB-E3/52T	Vishay General Semiconductor - Diodes Division	40	3	450 mV @ 3 A	400 µA @ 40 V	DO-214AA (SMB)	Active	ROHS3	-65 to 150
B340LB-E3/5BT	Vishay General Semiconductor - Diodes Division	40	3	450 mV @ 3 A	400 µA @ 40 V	DO-214AA (SMB)	Active	ROHS3	-65 to 150

Engineering Selection Recommendations

Primary Recommendation for Direct Replacement:

SS24H (Taiwan Semiconductor Corporation) is the direct equivalent to SS24 R5G. This part maintains identical electrical specifications (40V, 2A, 500 mV forward voltage @ 2A, 400 µA reverse leakage @ 40V), identical package (DO-214AA SMB), and identical operating temperature range (-55°C to 125°C). SS24H is currently active in production with RoHS3 compliance and unlimited moisture sensitivity rating. The primary distinction is packaging format: SS24H is supplied in Tape & Reel (TR) format with 8,688 pieces in stock, whereas the original SS24 R5G was supplied in Cut Tape (CT) format.

Secondary Recommendation for Package-Flexible Applications:

B240-13-F (Diodes Incorporated) provides electrical equivalence with extended operating temperature range (-65°C to 150°C). This part maintains 40V reverse voltage, 2A average rectified current, and 500 mV forward voltage @ 2A. The package is DO-214AA (SMB), identical to the original. B240-13-F is RoHS3 compliant and available in 65,400 pieces. The extended temperature range provides design margin for applications with elevated ambient or junction temperature requirements.

B240Q-13-F (Diodes Incorporated) is an automotive-qualified variant (AEC-Q101) of B240-13-F with identical electrical and package specifications. This part is suitable for automotive and high-reliability applications requiring formal qualification documentation.

Alternative for SMA Package Applications:

B240A-13-F (Diodes Incorporated) provides electrical equivalence in DO-214AC (SMA) package format. This part maintains 40V reverse voltage and 2A average rectified current with 500 mV forward voltage @ 2A. The SMA package is mechanically and electrically compatible with applications designed for smaller form factor surface mount components. B240A-13-F is RoHS3 compliant with extended temperature range (-65°C to 150°C) and 125,300 pieces in stock.

Not Recommended for Direct Substitution:

5819SMJ/TR13 (Microchip Technology) is rated for 1A average rectified current, which is insufficient for 2A circuit requirements. Although this part shares the 40V reverse voltage rating and DO-214AA package, the reduced current rating makes it unsuitable as a direct replacement.

B140BQ-13-F (Diodes Incorporated) is rated for 1A average rectified current and is similarly unsuitable for 2A applications.

B340BQ-13-F and B340LB-E3 variants are rated for 3A average rectified current, exceeding the 2A specification. These parts are suitable only for applications requiring higher current capacity.

Frequently Asked Questions (FAQ)

Q: Can SS24H be used as a direct replacement for SS24 R5G?

A: Yes. SS24H is a direct electrical and mechanical equivalent with identical specifications: 40V reverse voltage, 2A average rectified current, 500 mV forward voltage @ 2A, DO-214AA (SMB) package, and -55°C to 125°C operating temperature range. The only difference is packaging format (Tape & Reel instead of Cut Tape). Both parts are RoHS3 compliant with MSL 1 rating.

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

A: Both parts are electrically and mechanically identical: 40V, 2A, 500 mV forward voltage @ 2A, DO-214AA (SMB) package, RoHS3 compliant. B240Q-13-F includes automotive qualification (AEC-Q101) and is supplied in Tape & Reel format. B240-13-F is supplied in Cut Tape & Digi-Reel format. Select B240Q-13-F for automotive applications requiring formal qualification documentation.

Q: Can B240A-13-F be used in place of SS24 R5G?

A: B240A-13-F is electrically equivalent (40V, 2A, 500 mV forward voltage @ 2A) but uses DO-214AC (SMA) package instead of DO-214AA (SMB). SMA and SMB packages have different physical dimensions and PCB footprints. B240A-13-F is suitable only for applications with SMA package design or where package conversion is acceptable. The extended temperature range (-65°C to 150°C) provides additional design margin.

Q: Why is 5819SMJ/TR13 listed as a similar part but not recommended?

A: 5819SMJ/TR13 shares the 40V reverse voltage rating and DO-214AA (SMB) package but is rated for only 1A average rectified current. The SS24 R5G is rated for 2A. Using a 1A-rated diode in a 2A circuit exceeds the component's current capacity and creates reliability risk. Additionally, 5819SMJ/TR13 is RoHS non-compliant, which may conflict with design requirements.

Q: What is the significance of the extended temperature range in B240-13-F (-65°C to 150°C versus -55°C to 125°C)?

A: The extended temperature range indicates the part is qualified for operation across a wider junction temperature span. Applications with elevated ambient temperatures, high power dissipation, or thermal cycling requirements benefit from this extended range. The extended range does not affect electrical performance within the original -55°C to 125°C window but provides design margin for thermal stress conditions.

Q: Are all recommended substitutes RoHS3 compliant?

A: SS24H, B240-13-F, B240Q-13-F, and B240A-13-F are all RoHS3 compliant. 5819SMJ/TR13 is RoHS non-compliant and should not be selected for applications requiring RoHS compliance. Verify compliance requirements for your specific application before component selection.

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

A: Cut Tape (CT) packaging supplies components on tape that is cut into individual segments, typically for lower-volume or manual assembly operations. Tape & Reel (TR) packaging supplies components on continuous tape wound on reels, suitable for high-volume automated assembly. Both formats contain identical components; packaging format selection depends on assembly process requirements and order volume.

Q: Can B340LB-E3 variants be used if higher current capacity is needed?

A: B340LB-E3/52T and B340LB-E3/5BT are rated for 3A average rectified current, exceeding the 2A specification. These parts maintain 40V reverse voltage and DO-214AA (SMB) package compatibility. Use these variants only in applications requiring 3A or higher current capacity. They are not suitable for 2A-rated circuits as they represent oversizing.

Q: What does AEC-Q101 qualification indicate?

A: AEC-Q101 is an automotive electronics qualification standard. Parts bearing this qualification have undergone formal testing and validation for automotive applications, including thermal cycling, vibration, and reliability assessments. B240Q-13-F and B340BQ-13-F carry AEC-Q101 qualification. Select these parts for automotive or high-reliability applications requiring formal qualification documentation.

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