Equivalent & Substitute Parts for SS34-3HE3_A/H

Part Overview

The SS34-3HE3_A/H is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 40 V DC reverse voltage and 3 A average rectified current in a DO-214AB (SMC) surface mount package. This part is classified as discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design support and procurement.

The part is qualified to AEC-Q101 automotive standards and complies with ROHS3 and REACH requirements. Equivalent alternatives are available from Vishay and other manufacturers with identical or comparable electrical characteristics and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	40	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	500	mV @ 3 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	500	µA @ 40 V
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SS34-3HE3_A/H is determined by the following critical parameters:

Electrical Requirements:

Voltage - DC Reverse (Vr) (Max): 40 V minimum
Current - Average Rectified (Io): 3 A minimum
Voltage - Forward (Vf) (Max) @ If: 500 mV or lower at 3 A
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr: 500 µA or lower at 40 V

Mechanical Requirements:

Package / Case: DO-214AB, SMC
Mounting Type: Surface Mount

Compliance Requirements:

Grade: Automotive
Qualification: AEC-Q101
RoHS Status: ROHS3 Compliant

Substitute parts are grouped into three categories:

Direct Vishay Equivalents: Parts from the same manufacturer with identical electrical specifications and packaging, differing only in tape format or product status.
Parametric Equivalents from Vishay: Alternative Vishay part numbers meeting all electrical and mechanical criteria with active product status.
Cross-Manufacturer Equivalents: Parts from Comchip Technology and Microchip Technology meeting electrical and mechanical specifications with AEC-Q101 qualification.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ 3A [mV]	Reverse Leakage @ 40V [µA]	Package	Product Status	AEC-Q101	ROHS3
SS34-3HE3_A/H	Vishay	40	3	500	500	DO-214AB	Discontinued	Yes	Yes
SS34-3HE3_B/H	Vishay	40	3	500	500	DO-214AB	Active	Yes	Yes
SS34-3HE3_B/I	Vishay	40	3	500	500	DO-214AB	Active	Yes	Yes
SS34HE3_B/H	Vishay	40	3	500	500	DO-214AB	Active	Yes	Yes
SS34HE3_B/I	Vishay	40	3	500	500	DO-214AB	Active	Yes	Yes
SS34HM3_A/H	Vishay	40	3	500	500	DO-214AB	Active	Yes	Yes
SS34HM3_A/I	Vishay	40	3	500	500	DO-214AB	Active	Yes	Yes
ACDBC340-HF	Comchip Technology	40	3	550	500	DO-214AB	Active	Yes	Yes
CDBC340-G	Comchip Technology	40	3	500	500	DO-214AB	Active	No	Yes
5822SMJ/TR13	Microchip Technology	40	3	500	1500	DO-214AB	Active	No	No
5822SMJE3/TR13	Microchip Technology	40	3	500	1500	DO-214AB	Active	Yes	Yes

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement):

The Vishay parts SS34-3HE3_B/H, SS34-3HE3_B/I, SS34HE3_B/H, SS34HE3_B/I, SS34HM3_A/H, and SS34HM3_A/I are the preferred substitutes. All are manufactured by Vishay General Semiconductor - Diodes Division with identical electrical specifications to the discontinued SS34-3HE3_A/H. All substitute Vishay parts maintain AEC-Q101 qualification, ROHS3 compliance, and automotive-grade classification. These parts differ only in packaging format (Tape & Reel) and product status (Active), making them direct functional equivalents.

Secondary Substitutes (Cross-Manufacturer Options):

The Comchip Technology part CDBC340-G meets all electrical and mechanical requirements with identical forward voltage and reverse leakage specifications. However, this part does not carry AEC-Q101 qualification. The ACDBC340-HF from Comchip Technology maintains AEC-Q101 qualification but specifies a maximum forward voltage of 550 mV at 3 A, which is 50 mV higher than the original specification.

The Microchip Technology part 5822SMJE3/TR13 maintains AEC-Q101 qualification and ROHS3 compliance but specifies reverse leakage current of 1.5 mA at 40 V, which is three times higher than the original 500 µA specification. The 5822SMJ/TR13 variant does not meet ROHS3 or AEC-Q101 requirements.

Selection Criteria:

For applications requiring strict adherence to original specifications and automotive qualification, select from the Vishay product line (SS34-3HE3_B/H, SS34-3HE3_B/I, SS34HE3_B/H, SS34HE3_B/I, SS34HM3_A/H, SS34HM3_A/I).

For applications where forward voltage tolerance of ±50 mV is acceptable and AEC-Q101 qualification is required, ACDBC340-HF is suitable.

For applications where reverse leakage current tolerance of up to 1.5 mA is acceptable and AEC-Q101 qualification is required, 5822SMJE3/TR13 is suitable.

Frequently Asked Questions (FAQ)

Q: Can SS34-3HE3_B/H be used as a direct replacement for SS34-3HE3_A/H?

A: Yes. Both parts are manufactured by Vishay with identical electrical specifications (40 V, 3 A, 500 mV forward voltage, 500 µA reverse leakage). The primary difference is product status: SS34-3HE3_A/H is discontinued while SS34-3HE3_B/H is active. Both carry AEC-Q101 qualification and ROHS3 compliance.

Q: What is the difference between SS34-3HE3_B/H and SS34HE3_B/H?

A: Both parts are Vishay Schottky diodes with identical electrical specifications and DO-214AB packaging. The difference lies in the internal product designation structure. Both are active, AEC-Q101 qualified, and ROHS3 compliant. Selection between these variants depends on supplier availability and packaging format preference.

Q: Can I use 5822SMJE3/TR13 from Microchip Technology as a substitute?

A: 5822SMJE3/TR13 meets the voltage, current, and package requirements with identical forward voltage specification. However, it specifies reverse leakage current of 1.5 mA at 40 V compared to the original 500 µA. This part is suitable only if the application circuit tolerates higher reverse leakage. The part maintains AEC-Q101 qualification and ROHS3 compliance.

Q: Does ACDBC340-HF from Comchip Technology meet the original specifications?

A: ACDBC340-HF meets voltage, current, and package requirements with AEC-Q101 qualification. The forward voltage specification is 550 mV at 3 A, which is 50 mV higher than the original 500 mV. This part is suitable for applications where forward voltage tolerance of ±50 mV is acceptable.

Q: Are all substitute parts in DO-214AB packaging?

A: Yes. All substitute parts listed are packaged in DO-214AB (SMC) surface mount format, ensuring mechanical compatibility with the original design.

Q: Which substitute parts are ROHS3 compliant?

A: All Vishay parts (SS34-3HE3_B/H, SS34-3HE3_B/I, SS34HE3_B/H, SS34HE3_B/I, SS34HM3_A/H, SS34HM3_A/I), ACDBC340-HF from Comchip Technology, and 5822SMJE3/TR13 from Microchip Technology are ROHS3 compliant. The 5822SMJ/TR13 variant is not ROHS3 compliant.

Q: Which substitute parts carry AEC-Q101 automotive qualification?

A: All Vishay parts (SS34-3HE3_B/H, SS34-3HE3_B/I, SS34HE3_B/H, SS34HE3_B/I, SS34HM3_A/H, SS34HM3_A/I), ACDBC340-HF from Comchip Technology, and 5822SMJE3/TR13 from Microchip Technology carry AEC-Q101 qualification. The CDBC340-G from Comchip Technology and 5822SMJ/TR13 from Microchip Technology do not carry this qualification.

Q: What is the operating temperature range for substitute parts?

A: Vishay parts and 5822SMJE3/TR13 operate from -55°C to 150°C junction temperature. ACDBC340-HF operates from -55°C to 125°C. CDBC340-G specifies a maximum junction temperature of 125°C. Verify temperature range compatibility with application requirements.

Q: Are there inventory considerations for selecting a substitute?

A: Inventory levels vary by part number and supplier. SS34HE3_B/H has the highest inventory (8144 pcs), while SS34HM3_A/H and SS34HM3_A/I have lower availability (1067 and 1131 pcs respectively). Cross-manufacturer options from Comchip Technology and Microchip Technology have varying inventory levels. Confirm availability with your supplier before design finalization.

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