SS24S-E3/5AT Equivalent & Substitute Parts

Part Overview

The SS24S-E3/5AT is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 40 V DC reverse voltage and 2 A average rectified current in a surface mount DO-214AC (SMA) package. This part is classified as Active product status and is RoHS3 compliant. Equivalent and substitute parts are identified to support design flexibility, supply chain continuity, and application-specific requirements where parametric or packaging variations are acceptable within defined electrical boundaries.

Key Parameters

Parameter	Value	Unit
Technology	Schottky	—
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	200	µA @ 40 V
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SS24S-E3/5AT is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

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

Parametric Equivalent Parts (SS24S-E3/61T, SS24S-M3/5AT, SS24SHE3_B/H) maintain identical electrical ratings and the same base product series (SS24), differing only in packaging format (Cut Tape vs. Tape & Reel) or automotive qualification grade. These parts are direct functional replacements.

Direct Manufacturer Equivalents (STPS2L60A) exceed the reverse voltage specification (60 V vs. 40 V) while maintaining 2 A current rating and fast recovery characteristics. This part is suitable for applications where higher voltage margin is acceptable.

Manufacturer Recommended Alternatives (B140-13-F, B140Q-13-F, STPS140A) operate at reduced current ratings (1 A vs. 2 A) with identical 40 V reverse voltage and fast recovery speed. These parts are suitable for lower-current applications or as secondary sources.

Manufacturer Recommended Alternatives (CDBM240-G, RB068L-40DDTE25) maintain 40 V / 2 A ratings with alternative package formats (Mini SMA/SOD-123, PMDS) or automotive qualification. These parts require PCB layout modification due to different package geometry.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Ir @ Vr [µA]	Package	Packaging Type	Automotive Grade
SS24S-E3/5AT	Vishay	40	2	550 @ 2A	200 @ 40V	DO-214AC (SMA)	Tape & Reel	No
SS24S-E3/61T	Vishay	40	2	550 @ 2A	200 @ 40V	DO-214AC (SMA)	Cut Tape	No
SS24S-M3/5AT	Vishay	40	2	550 @ 2A	200 @ 40V	DO-214AC (SMA)	Tape & Reel	No
SS24SHE3_B/H	Vishay	40	2	550 @ 2A	200 @ 40V	DO-214AC (SMA)	Tape & Reel	Yes (AEC-Q101)
STPS2L60A	STMicroelectronics	60	2	600 @ 2A	100 @ 60V	DO-214AC (SMA)	Cut Tape & Digi-Reel	No
B140-13-F	Diodes Incorporated	40	1	500 @ 1A	500 @ 40V	DO-214AC (SMA)	Cut Tape & Digi-Reel	No
B140Q-13-F	Diodes Incorporated	40	1	500 @ 1A	500 @ 40V	DO-214AC (SMA)	Cut Tape & Digi-Reel	Yes (AEC-Q101)
STPS140A	STMicroelectronics	40	1	550 @ 1A	12 @ 40V	DO-214AC (SMA)	Cut Tape & Digi-Reel	No
CDBM240-G	Comchip Technology	40	2	500 @ 2A	500 @ 40V	SOD-123T (Mini SMA)	Tape & Reel	No
RB068L-40DDTE25	Rohm Semiconductor	40	2	690 @ 2A	1 @ 40V	DO-214AC (SMA)	Tape & Reel	Yes (AEC-Q101)

Engineering Selection Recommendations

Parametric Equivalent Selection (SS24S-E3/61T, SS24S-M3/5AT, SS24SHE3_B/H): These parts are direct functional equivalents with identical electrical specifications. Selection between them is based on packaging format (Cut Tape vs. Tape & Reel) and application requirements. The SS24SHE3_B/H variant includes AEC-Q101 automotive qualification and is suitable for automotive applications. Standard industrial applications may use SS24S-E3/5AT or SS24S-M3/5AT based on procurement format preference.

Higher Voltage Margin Selection (STPS2L60A): This STMicroelectronics part provides 60 V reverse voltage rating while maintaining 2 A current capacity. Forward voltage is slightly elevated (600 mV vs. 550 mV at 2 A). This part is suitable for applications requiring additional voltage margin or where supply chain availability of 40 V parts is constrained. Thermal performance and reverse leakage characteristics differ; circuit thermal analysis is required.

Reduced Current Rating Selection (B140-13-F, B140Q-13-F, STPS140A): These parts are rated for 1 A average rectified current at 40 V reverse voltage. They are suitable only for applications where the circuit current requirement does not exceed 1 A. The B140Q-13-F includes AEC-Q101 automotive qualification. STPS140A offers superior reverse leakage performance (12 µA vs. 200 µA at 40 V). These parts are not suitable as direct replacements for 2 A applications.

Alternative Package Selection (CDBM240-G, RB068L-40DDTE25): CDBM240-G uses SOD-123T (Mini SMA) package, requiring PCB layout modification. RB068L-40DDTE25 uses PMDS package and includes AEC-Q101 automotive qualification with superior reverse leakage (1 µA). Both maintain 40 V / 2 A ratings. These selections are appropriate only when package footprint constraints or automotive qualification requirements override standard DO-214AC compatibility.

Frequently Asked Questions (FAQ)

Q: Can SS24S-E3/61T replace SS24S-E3/5AT directly on the PCB? A: Yes. Both parts use identical DO-214AC (SMA) package geometry and have identical electrical specifications. The difference is packaging format: SS24S-E3/61T is supplied in Cut Tape format while SS24S-E3/5AT is supplied in Tape & Reel format. PCB footprint and soldering process are unchanged.

Q: Is STPS2L60A a suitable replacement for SS24S-E3/5AT? A: STPS2L60A is electrically compatible for applications where 40 V reverse voltage is the design minimum. The 60 V rating provides additional voltage margin. However, forward voltage is 50 mV higher (600 mV vs. 550 mV at 2 A), which may affect circuit efficiency. Reverse leakage is lower (100 µA vs. 200 µA at rated voltage). Thermal analysis is required to confirm suitability in the specific application.

Q: Can B140-13-F or STPS140A replace SS24S-E3/5AT? A: No. These parts are rated for 1 A average rectified current, while SS24S-E3/5AT is rated for 2 A. Using a 1 A part in a 2 A application will cause device failure. These parts are suitable only for circuits designed for 1 A or lower current.

Q: What is the difference between SS24SHE3_B/H and SS24S-E3/5AT? A: Both parts have identical electrical specifications and DO-214AC package. SS24SHE3_B/H includes AEC-Q101 automotive qualification, making it suitable for automotive applications. SS24S-E3/5AT is standard industrial grade. Selection depends on application requirements.

Q: Does CDBM240-G require PCB redesign? A: Yes. CDBM240-G uses SOD-123T (Mini SMA) package, which has different footprint dimensions than DO-214AC (SMA). PCB layout modification is required. This part is suitable only when package size reduction is a design objective.

Q: What is the impact of using RB068L-40DDTE25 instead of SS24S-E3/5AT? A: RB068L-40DDTE25 maintains 40 V / 2 A ratings and includes AEC-Q101 automotive qualification. Forward voltage is higher (690 mV vs. 550 mV at 2 A), which increases power dissipation. Reverse leakage is significantly lower (1 µA vs. 200 µA), improving standby power performance. PMDS package requires PCB layout verification. This part is suitable for automotive applications where lower leakage current is beneficial.

Q: Are all listed parts RoHS3 compliant? A: Yes. All parts listed in this reference are RoHS3 compliant and have MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions.

Q: Which substitute part has the lowest reverse leakage current? A: RB068L-40DDTE25 has the lowest reverse leakage at 1 µA @ 40 V, compared to 200 µA for the main part. STPS140A offers 12 µA @ 40 V. Lower leakage is beneficial for low-power standby applications.

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