SS24SHE3_A/I Schottky Diode Equivalent & Substitute Parts

Part Overview

The SS24SHE3_A/I is a 40V, 2A Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division in the DO-214AC (SMA) surface mount package. This automotive-grade component is qualified to AEC-Q101 and features fast recovery characteristics suitable for high-frequency switching applications. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 2 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Current - Reverse Leakage @ Vr	200	µA @ 40 V
Capacitance @ Vr, F	130	pF @ 4V, 1MHz
Technology	Schottky	—
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—
MSL	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SS24SHE3_A/I is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 40 V
Current - Average Rectified (Io): 2 A
Technology: Schottky
Package / Case: DO-214AC, SMA
Mounting Type: Surface Mount
Operating Temperature Range: -55°C to 150°C minimum

Secondary Compatibility Factors:

Voltage - Forward (Vf) (Max) @ If: 550 mV @ 2 A (allowable tolerance range)
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr: 200 µA @ 40 V (allowable tolerance range)
Capacitance @ Vr, F: 130 pF @ 4V, 1MHz (allowable tolerance range)
Grade: Automotive (preferred for automotive applications)
Qualification: AEC-Q101 (preferred for automotive applications)

Vishay direct equivalents (SS24SHE3_B/I, SS24S-E3/5AT, SS24S-E3/61T, SS24S-M3/5AT, SS24S-M3/61T) maintain identical electrical specifications and are fully interchangeable. Cross-manufacturer alternatives (B140-13-F, CDBM240-G, RB068L-40DDTE25, STPS140A) are listed based on manufacturer recommendations but may exhibit variations in forward voltage, reverse leakage, or capacitance characteristics that require circuit-level evaluation.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV]	Reverse Leakage @ Vr [µA]	Package	Mounting	Temp Range [°C]	Status	Packaging Type
SS24SHE3_A/I	Vishay	40	2	550 @ 2A	200 @ 40V	DO-214AC, SMA	Surface Mount	-55 to 150	Discontinued	Bulk
SS24SHE3_B/I	Vishay	40	2	Not specified	200 @ 40V	DO-214AC, SMA	Surface Mount	-55 to 150	Active	Tape & Reel
SS24S-E3/5AT	Vishay	40	2	550 @ 2A	200 @ 40V	DO-214AC, SMA	Surface Mount	-55 to 150	Active	Tape & Reel
SS24S-E3/61T	Vishay	40	2	550 @ 2A	200 @ 40V	DO-214AC, SMA	Surface Mount	-55 to 150	Active	Cut Tape
SS24S-M3/5AT	Vishay	40	2	550 @ 2A	200 @ 40V	DO-214AC, SMA	Surface Mount	-55 to 150	Active	Tape & Reel
SS24S-M3/61T	Vishay	40	2	550 @ 2A	200 @ 40V	DO-214AC, SMA	Surface Mount	-55 to 150	Active	Tape & Reel
SS24SHE3_B/H	Vishay	40	2	550 @ 2A	200 @ 40V	DO-214AC, SMA	Surface Mount	-55 to 150	Active	Tape & Reel
B140-13-F	Diodes Incorporated	40	1	500 @ 1A	500 @ 40V	DO-214AC, SMA	Surface Mount	-65 to 150	Active	Cut Tape & Digi-Reel
CDBM240-G	Comchip Technology	40	2	500 @ 2A	500 @ 40V	SOD-123T	Surface Mount	-55 to 125	Active	Tape & Reel
RB068L-40DDTE25	Rohm Semiconductor	40	2	690 @ 2A	1 @ 40V	DO-214AC, SMA	Surface Mount	-55 to 150	Active	Tape & Reel
STPS140A	STMicroelectronics	40	1	550 @ 1A	12 @ 40V	DO-214AC, SMA	Surface Mount	-55 to 150	Active	Cut Tape & Digi-Reel

Engineering Selection Recommendations

Vishay Direct Equivalents (Recommended Primary Substitutes):

The following Vishay parts are direct electrical and mechanical equivalents to the SS24SHE3_A/I and are the preferred substitutes:

SS24SHE3_B/I: Identical specifications with active product status. Available in Tape & Reel packaging. Maintains automotive grade and AEC-Q101 qualification.
SS24S-E3/5AT: Full parametric equivalent with active status. Available in Tape & Reel. Suitable for high-volume production.
SS24S-E3/61T: Full parametric equivalent with active status. Available in Cut Tape. Suitable for lower-volume or mixed-reel applications.
SS24S-M3/5AT: Full parametric equivalent with active status. Available in Tape & Reel with highest inventory (42,288 pcs).
SS24S-M3/61T: Full parametric equivalent with active status. Available in Tape & Reel. Maintains automotive grade and AEC-Q101 qualification.
SS24SHE3_B/H: Full parametric equivalent with active status. Available in Tape & Reel. Maintains automotive grade and AEC-Q101 qualification.

Cross-Manufacturer Alternatives (Secondary Substitutes):

Cross-manufacturer parts are available but exhibit parameter deviations requiring circuit-level compatibility assessment:

B140-13-F (Diodes Incorporated): 40V, 1A rating (reduced current capacity). Forward voltage 500 mV @ 1A. Reverse leakage 500 µA @ 40V (elevated). Operating temperature extends to -65°C. Not suitable for 2A applications without derating.
CDBM240-G (Comchip Technology): 40V, 2A rating with matching current capacity. Package is SOD-123T (Mini SMA), not standard DO-214AC. Forward voltage 500 mV @ 2A (lower). Reverse leakage 500 µA @ 40V (elevated). Maximum junction temperature 125°C (reduced). Physical package incompatibility requires PCB layout modification.
RB068L-40DDTE25 (Rohm Semiconductor): 40V, 2A rating with matching current capacity. Forward voltage 690 mV @ 2A (significantly elevated). Reverse leakage 1 µA @ 40V (significantly reduced). Maintains automotive grade and AEC-Q101 qualification. Package is PMDS (supplier-specific). Higher forward voltage increases power dissipation.
STPS140A (STMicroelectronics): 40V, 1A rating (reduced current capacity). Forward voltage 550 mV @ 1A. Reverse leakage 12 µA @ 40V (significantly reduced). Not suitable for 2A applications without derating.

Selection Criteria:

For direct replacement in existing designs, select from Vishay direct equivalents (SS24SHE3_B/I, SS24S-E3/5AT, SS24S-E3/61T, SS24S-M3/5AT, SS24S-M3/61T, SS24SHE3_B/H). These maintain full electrical and mechanical compatibility with the discontinued SS24SHE3_A/I.

Cross-manufacturer alternatives are suitable only when circuit design permits parameter deviations or when specific supply chain constraints necessitate alternative sourcing. Verify forward voltage drop, reverse leakage current, and thermal performance in target application before implementation.

Frequently Asked Questions (FAQ)

Q: Can I directly replace SS24SHE3_A/I with SS24SHE3_B/I?

A: Yes. SS24SHE3_B/I is a direct equivalent with identical electrical specifications (40V, 2A, 550 mV forward voltage @ 2A, 200 µA reverse leakage @ 40V). The primary difference is packaging format (Tape & Reel vs. bulk) and active product status. No circuit modifications are required.

Q: What is the difference between SS24S-E3/5AT and SS24S-M3/5AT?

A: Both parts are parametric equivalents with identical electrical specifications. The difference is in the internal device designation (E3 vs. M3 suffix). Both are available in Tape & Reel packaging. SS24S-M3/5AT has higher inventory availability (42,288 pcs vs. 4,346 pcs).

Q: Why is B140-13-F listed as a substitute if it is only rated for 1A?

A: B140-13-F is listed as a manufacturer-recommended alternative but is not a direct substitute due to reduced current rating (1A vs. 2A). It is suitable only for applications where the actual circuit current does not exceed 1A, even if the original design specified 2A capacity. Circuit-level evaluation is required.

Q: Can I use CDBM240-G as a drop-in replacement?

A: CDBM240-G is not a drop-in replacement. While it matches the 40V, 2A electrical rating, the package is SOD-123T (Mini SMA) instead of DO-214AC (SMA). Physical dimensions differ, requiring PCB layout modification. Additionally, the maximum junction temperature is 125°C (vs. 150°C for SS24SHE3_A/I), reducing thermal margin.

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 currents greater than 200 milliamps. This parameter is critical for high-frequency switching applications and is maintained across all listed substitutes.

Q: Are all listed substitutes RoHS3 compliant?

A: Yes. All substitute parts listed are RoHS3 compliant and REACH unaffected, matching the environmental compliance status of the original SS24SHE3_A/I.

Q: Which substitute has the lowest reverse leakage current?

A: RB068L-40DDTE25 has the lowest reverse leakage at 1 µA @ 40V, compared to 200 µA for the original part. This reduced leakage may be beneficial in low-power or high-impedance circuit applications but increases forward voltage drop to 690 mV @ 2A.

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

A: Cut Tape packaging provides individual component strips suitable for lower-volume applications or mixed-component orders. Tape & Reel packaging provides continuous reels suitable for automated assembly equipment and high-volume production. Electrical specifications are identical; packaging format affects procurement and assembly logistics only.

Q: Can I use STPS140A in a 2A application?

A: STPS140A is rated for 1A average rectified current. Using it in a 2A application would exceed its current rating and cause excessive heating and potential device failure. It is not suitable for 2A applications without circuit redesign to reduce current demand.

Q: Is automotive qualification (AEC-Q101) required for my application?

A: AEC-Q101 qualification is required for automotive applications subject to automotive industry standards. If your application is automotive, select from parts maintaining this qualification: SS24SHE3_B/I, SS24S-M3/61T, SS24SHE3_B/H, or RB068L-40DDTE25. Non-automotive applications may use any listed substitute.

Q: What is the operating temperature range difference between parts?

A: Most substitutes operate from -55°C to 150°C, matching the original. B140-13-F extends to -65°C (wider range). CDBM240-G is limited to -55°C to 125°C (narrower range). Verify your application's temperature requirements before selection.

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