SSA24-M3/5AT Equivalent & Substitute Parts

Part Overview

The SSA24-M3/5AT 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 component is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified to address supply chain requirements, packaging preferences, and application-specific performance variations while maintaining electrical and mechanical compatibility within specified parameters.

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	490	mV @ 2 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	200	µA @ 40 V
Mounting Type	Surface Mount	—
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-65 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the SSA24-M3/5AT are grouped based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

Electrical Parameters:

Voltage - DC Reverse (Vr) (Max): 40 V minimum
Current - Average Rectified (Io): 2 A
Technology: Schottky
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Operating Temperature - Junction: -65°C to 150°C minimum range

Mechanical Parameters:

Mounting Type: Surface Mount
Package / Case: DO-214AC (SMA) or equivalent form factor
RoHS Status: ROHS3 Compliant

Parametric Equivalents (Vishay SSA24 series) maintain identical electrical specifications and the same base product number, differing only in packaging format (Tape & Reel versus Cut Tape & Digi-Reel).

Manufacturer Recommended Alternatives from Diodes Incorporated and Comchip Technology meet the core electrical requirements with minor variations in forward voltage, reverse leakage current, or capacitance characteristics that remain within acceptable operating margins for 40 V / 2 A Schottky rectifier applications.

Package Variants include the CDBM240-G (Mini SMA/SOD-123), which maintains electrical performance but uses a different physical form factor suitable for space-constrained layouts.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ 2A [mV]	Ir @ Vr [µA]	Package	Packaging Format	Temp Range [°C]	Product Status
SSA24-M3/5AT	Vishay	40	2	490	200 @ 40V	DO-214AC (SMA)	Tape & Reel	-65 to 150	Active
SSA24-E3/5AT	Vishay	40	2	490	200 @ 40V	DO-214AC (SMA)	Tape & Reel	-65 to 150	Active
SSA24-E3/61T	Vishay	40	2	490	200 @ 40V	DO-214AC (SMA)	Cut Tape & Digi-Reel	-65 to 150	Active
SSA24HE3_A/H	Vishay	40	2	490	200 @ 30V	DO-214AC (SMA)	Tape & Reel	-65 to 150	Active
SSA24HE3_A/I	Vishay	40	2	490	200 @ 40V	DO-214AC (SMA)	Tape & Reel	-65 to 150	Active
B240A-13-F	Diodes Incorporated	40	2	500	500 @ 40V	DO-214AC (SMA)	Cut Tape & Digi-Reel	-65 to 150	Active
B250A-13-F	Diodes Incorporated	50	2	700	500 @ 50V	DO-214AC (SMA)	Tape & Reel	-65 to 150	Active
CDBA240-G	Comchip Technology	40	2	500	500 @ 40V	DO-214AC (SMA)	Tape & Reel	-55 to 125	Active
CDBM240-G	Comchip Technology	40	2	500	500 @ 40V	SOD-123T (Mini SMA)	Tape & Reel	-55 to 125	Active
SS24-LTP	Micro Commercial Co	40	2	550	500 @ 40V	DO-214AC (SMA)	Tape & Reel	-55 to 125	Active

Engineering Selection Recommendations

Vishay SSA24 Series (SSA24-E3/5AT, SSA24-E3/61T, SSA24HE3_A/H, SSA24HE3_A/I): These parts are parametric equivalents to the SSA24-M3/5AT with identical electrical specifications. Selection between these variants depends on packaging format requirements: Tape & Reel (TR) for automated assembly lines, or Cut Tape & Digi-Reel for mixed-volume production. The SSA24HE3_A/H and SSA24HE3_A/I variants include AEC-Q101 automotive qualification and are suitable for automotive-grade applications.

Diodes Incorporated B240A-13-F: This part meets the 40 V / 2 A electrical requirements with marginally higher forward voltage (500 mV vs. 490 mV) and reverse leakage current (500 µA vs. 200 µA). It is suitable for applications where these parameter variations are acceptable and where Diodes Incorporated supply chain or logistics advantages apply.

Diodes Incorporated B250A-13-F: This 50 V rated device provides higher voltage margin but exhibits significantly higher forward voltage (700 mV) and reverse leakage current. Use only when 50 V reverse voltage rating is required; it is not recommended as a direct substitute for 40 V applications due to performance degradation.

Comchip Technology CDBA240-G: Electrically equivalent to B240A-13-F with 40 V / 2 A rating. Operating temperature range is reduced to -55°C to 125°C. Suitable for commercial-grade applications within this temperature window.

Comchip Technology CDBM240-G: Provides 40 V / 2 A performance in a Mini SMA/SOD-123 package (SOD-123T). Use this variant only when board space constraints require a smaller form factor; note the reduced operating temperature range (-55°C to 125°C).

Micro Commercial Co SS24-LTP: Meets 40 V / 2 A requirements with higher forward voltage (550 mV) and reverse leakage current (500 µA). Operating temperature range is -55°C to 125°C. Suitable for cost-optimized designs where performance variations are acceptable.

All recommended substitutes maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating.

Frequently Asked Questions (FAQ)

Q: Can SSA24-E3/5AT be used as a direct replacement for SSA24-M3/5AT?

A: Yes. Both parts are Vishay SSA24 series Schottky diodes with identical electrical specifications: 40 V reverse voltage, 2 A average rectified current, 490 mV forward voltage at 2 A, and -65°C to 150°C operating temperature range. The difference is packaging format: SSA24-M3/5AT is supplied in Tape & Reel, while SSA24-E3/5AT is also Tape & Reel. Both are direct parametric equivalents.

Q: What is the difference between SSA24-E3/61T and SSA24-E3/5AT?

A: Both parts have identical electrical specifications. The difference is packaging format: SSA24-E3/61T is supplied in Cut Tape & Digi-Reel format, while SSA24-E3/5AT is Tape & Reel. Select based on your assembly process requirements.

Q: Can B240A-13-F replace SSA24-M3/5AT?

A: B240A-13-F is electrically compatible for 40 V / 2 A applications. However, it exhibits higher forward voltage (500 mV vs. 490 mV at 2 A) and higher reverse leakage current (500 µA vs. 200 µA at 40 V). These differences are within acceptable margins for most rectifier applications but should be verified for designs with tight power dissipation or leakage current budgets.

Q: Why is B250A-13-F listed as a substitute if it has 50 V rating?

A: B250A-13-F is listed as a manufacturer-recommended alternative for applications requiring higher voltage margin. It is not a direct substitute for 40 V designs due to significantly higher forward voltage (700 mV) and reverse leakage current (500 µA). Use only when 50 V reverse voltage rating is a design requirement.

Q: What is the difference between CDBA240-G and CDBM240-G?

A: Both are Comchip Technology 40 V / 2 A Schottky diodes with identical electrical specifications. CDBA240-G uses DO-214AC (SMA) package, while CDBM240-G uses SOD-123T (Mini SMA) package. CDBM240-G is smaller and suitable for space-constrained layouts. Both have reduced operating temperature range (-55°C to 125°C) compared to Vishay parts.

Q: Are automotive-qualified versions available?

A: Yes. SSA24HE3_A/H and SSA24HE3_A/I are Vishay automotive-grade variants with AEC-Q101 qualification. Both maintain 40 V / 2 A specifications and -65°C to 150°C operating temperature range. Use these for automotive applications requiring formal qualification documentation.

Q: What is the impact of higher reverse leakage current in alternative parts?

A: Higher reverse leakage current (500 µA vs. 200 µA) increases power dissipation and may affect circuit performance in applications with high impedance nodes or precision analog circuits. For standard rectifier applications, this difference is typically acceptable. Verify leakage current requirements for your specific application.

Q: Can SS24-LTP be used in high-temperature applications?

A: No. SS24-LTP has a maximum operating temperature of 125°C, compared to 150°C for SSA24-M3/5AT. For applications requiring -65°C to 150°C range, use Vishay SSA24 series parts. SS24-LTP is suitable only for -55°C to 125°C applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and have MSL 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of SSA24-M3/5AT.

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