SS24-M3/5BT Schottky Diode 40V 2A Equivalent & Substitute Parts

Part Overview

The SS24-M3/5BT is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 40V DC reverse voltage and 2A average rectified current in a surface mount DO-214AA (SMB) package. This part is supplied in Tape & Reel (TR) packaging and maintains Active product status. Equivalent and substitute parts are identified based on matching electrical specifications and mechanical compatibility to support procurement flexibility, inventory management, and supply chain continuity.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	500 mV @ 2 A	mV @ A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	400	µA @ 40 V
Mounting Type	Surface Mount	—
Package / Case	DO-214AA, SMB	—
Operating Temperature - Junction	-65 to 125	°C
Technology	Schottky	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the SS24-M3/5BT are classified into three categories based on substitution relationship and electrical compatibility:

Parametric Equivalents (Same Manufacturer - Vishay): Parts SS24-E3/52T and SS24-E3/5BT share identical electrical specifications with the main part (40V, 2A, 500 mV forward voltage, 400 µA reverse leakage). These differ only in packaging format: SS24-E3/52T uses Cut Tape (CT) packaging, while SS24-E3/5BT uses Tape & Reel (TR). Both maintain the same base product number (SS24) and are fully interchangeable at the electrical level.

Upgrade/Cross-Manufacturer Equivalents: Parts SS24T3G (onsemi), B240-13-F (Diodes Incorporated), CDBB240-G (Comchip Technology), MBRS2040LT3G (onsemi), MBRS240LT3G (onsemi), and STPS2L40U (STMicroelectronics) meet the core electrical requirements: 40V reverse voltage and 2A average rectified current. All use DO-214AA/SMB surface mount packaging. These parts are functionally equivalent but originate from different manufacturers and may exhibit minor variations in forward voltage (430–500 mV range), reverse leakage current (220–800 µA range), and operating temperature ranges (-55°C to -65°C minimum; 125°C to 150°C maximum).

Higher Current Rating (Upgrade Path): Part SD2114S040S5R0 (KYOCERA AVX) provides a 5A average rectified current rating at the same 40V reverse voltage, enabling use in higher-current applications while maintaining backward compatibility in lower-current designs. Part SSB44 R5G (Taiwan Semiconductor Corporation) offers 4A rating. These represent performance upgrades rather than direct substitutes.

Substitution Criteria: All listed parts maintain Schottky technology, fast recovery speed (≤500ns, >200mA), DO-214AA/SMB surface mount package, ROHS3 compliance, MSL 1 rating, and operating junction temperature ranges suitable for industrial applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Ir @ Vr [µA]	Tj (Min–Max) [°C]	Packaging	Package / Case
SS24-M3/5BT	Vishay	40	2	500 @ 2A	400 @ 40V	-65 to 125	Tape & Reel (TR)	DO-214AA, SMB
SS24-E3/52T	Vishay	40	2	500 @ 2A	400 @ 40V	-65 to 125	Cut Tape (CT)	DO-214AA, SMB
SS24-E3/5BT	Vishay	40	2	500 @ 2A	400 @ 40V	-65 to 125	Tape & Reel (TR)	DO-214AA, SMB
SS24T3G	onsemi	40	2	500 @ 2A	400 @ 40V	-55 to 150	Cut Tape (CT) & Digi-Reel®	DO-214AA, SMB
B240-13-F	Diodes Incorporated	40	2	500 @ 2A	500 @ 40V	-65 to 150	Cut Tape (CT) & Digi-Reel®	DO-214AA, SMB
CDBB240-G	Comchip Technology	40	2	500 @ 2A	500 @ 40V	-55 to 125	Tape & Reel (TR)	DO-214AA, SMB
MBRS2040LT3G	onsemi	40	2	430 @ 2A	800 @ 40V	-55 to 125	Cut Tape (CT) & Digi-Reel®	DO-214AA, SMB
MBRS240LT3G	onsemi	40	2	430 @ 2A	2000 @ 40V	-55 to 150	Cut Tape (CT) & Digi-Reel®	DO-214AA, SMB
SD2114S040S5R0	KYOCERA AVX	40	5	550 @ 5A	500 @ 40V	-55 to 125	Tape & Reel (TR)	2-SMD, No Lead
SSB44 R5G	Taiwan Semiconductor Corporation	40	4	500 @ 4A	200 @ 40V	-55 to 150	Cut Tape (CT)	DO-214AA, SMB
STPS2L40U	STMicroelectronics	40	2	430 @ 2A	220 @ 40V	-55 to 150	Cut Tape (CT) & Digi-Reel®	DO-214AA, SMB

Engineering Selection Recommendations

Direct Replacement (Parametric Equivalents): SS24-E3/52T and SS24-E3/5BT are recommended for direct substitution when supply of the primary part SS24-M3/5BT is unavailable. Both maintain identical electrical performance and Vishay manufacturing quality. Selection between these two depends on packaging requirements: use SS24-E3/52T for Cut Tape applications or SS24-E3/5BT for Tape & Reel requirements.

Cross-Manufacturer Substitution: Parts from onsemi (SS24T3G, MBRS2040LT3G, MBRS240LT3G), Diodes Incorporated (B240-13-F), Comchip Technology (CDBB240-G), and STMicroelectronics (STPS2L40U) are electrically compatible at the 40V/2A specification level. These parts are suitable for applications where manufacturer diversity is acceptable and supply chain flexibility is prioritized. Forward voltage variations (430–500 mV) and reverse leakage differences (220–2000 µA) fall within acceptable tolerances for standard rectification circuits. Extended temperature ranges (-55°C to 150°C for selected parts) provide enhanced performance margin in temperature-sensitive applications.

Higher Current Ratings: SD2114S040S5R0 (5A) and SSB44 R5G (4A) are suitable for applications requiring higher current capacity while maintaining 40V reverse voltage rating. These parts are backward compatible in 2A-rated circuits and provide design margin for future current increases.

Compliance and Certification: All listed parts maintain ROHS3 compliance, MSL 1 (Unlimited) moisture sensitivity rating, and EAR99 export classification. Selection should account for operating temperature requirements: parts with -65°C minimum junction temperature (SS24-M3/5BT, SS24-E3/52T, SS24-E3/5BT, B240-13-F) are preferred for extended low-temperature operation; parts with -55°C minimum are suitable for standard industrial temperature ranges.

Frequently Asked Questions (FAQ)

Q: Can SS24-E3/52T replace SS24-M3/5BT directly?

A: Yes. SS24-E3/52T is a parametric equivalent with identical electrical specifications (40V, 2A, 500 mV forward voltage, 400 µA reverse leakage). The only difference is packaging format: SS24-E3/52T uses Cut Tape (CT) while SS24-M3/5BT uses Tape & Reel (TR). Verify your assembly equipment compatibility with the packaging format before substitution.

Q: What is the difference between MBRS2040LT3G and MBRS240LT3G?

A: Both parts meet the 40V/2A electrical specification. The primary difference is reverse leakage current: MBRS2040LT3G specifies 800 µA @ 40V, while MBRS240LT3G specifies 2000 µA @ 40V. MBRS240LT3G also supports extended operating temperature to 150°C. For low-leakage applications, MBRS2040LT3G is preferred; for high-temperature environments, MBRS240LT3G is recommended.

Q: Is SD2114S040S5R0 compatible with circuits designed for 2A operation?

A: Yes. SD2114S040S5R0 is rated for 5A average rectified current at 40V reverse voltage, making it backward compatible with 2A-rated designs. The higher current rating provides design margin and allows use in upgraded circuits requiring increased current capacity. Note that the package designation differs (2114/DO-214AA vs. standard DO-214AA).

Q: What are the key differences between Vishay SS24 variants and onsemi equivalents?

A: Vishay SS24-M3/5BT, SS24-E3/52T, and SS24-E3/5BT maintain 500 mV forward voltage and 400 µA reverse leakage. onsemi equivalents (SS24T3G, MBRS2040LT3G, MBRS240LT3G) typically feature lower forward voltage (430 mV) but higher reverse leakage (400–2000 µA). Both manufacturers provide ROHS3 compliance and MSL 1 ratings. Selection depends on circuit sensitivity to forward voltage drop and leakage current specifications.

Q: Can I use STPS2L40U in place of SS24-M3/5BT?

A: Yes. STPS2L40U (STMicroelectronics) meets the 40V/2A electrical requirement with 430 mV forward voltage and 220 µA reverse leakage. It supports extended operating temperature to 150°C and is available in Cut Tape & Digi-Reel® packaging. Verify that your assembly process accommodates the packaging format and that the lower forward voltage (70 mV reduction) does not affect circuit performance.

Q: What is the significance of operating temperature range differences?

A: Parts with -65°C minimum junction temperature (Vishay variants, B240-13-F) support extended low-temperature operation required in aerospace, automotive, and outdoor applications. Parts with -55°C minimum are suitable for standard industrial temperature ranges (-40°C to +85°C ambient). Parts rated to 150°C maximum junction temperature provide enhanced thermal margin in high-temperature environments. Select based on your application's thermal requirements.

Q: Are all listed parts available in the same DO-214AA/SMB package?

A: Most parts use DO-214AA (SMB) surface mount package. Exception: SD2114S040S5R0 uses 2-SMD, No Lead package designation (2114/DO-214AA). Verify PCB footprint compatibility before substitution, as package variations may require layout adjustments despite similar external dimensions.

Q: What does "Fast Recovery ≤500ns, >200mA (Io)" mean?

A: This specification indicates the diode exhibits fast recovery characteristics with recovery time not exceeding 500 nanoseconds when switching from forward to reverse bias at currents greater than 200 milliamps. All listed parts meet this specification, ensuring suitable performance in high-frequency switching applications and power supply circuits.

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