SS34-7000HE3_A/I Equivalent & Substitute Parts

Part Overview

The SS34-7000HE3_A/I 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 obsolete, necessitating identification of active equivalent and substitute components for ongoing design support and procurement continuity. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts satisfy the same functional requirements within the allowed parameter tolerances for this diode category.

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 SS34-7000HE3_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): 3 A
Voltage - Forward (Vf) (Max) @ If: 500 mV @ 3 A (or within acceptable tolerance)
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°C to 150°C (or higher minimum)
Grade: Automotive
Qualification: AEC-Q101
RoHS Status: ROHS3 Compliant

Substitute parts are grouped into two categories:

Category 1: Vishay Parametric Equivalents (Active Status) Parts SS34-3HE3_B/H, SS34-3HE3_B/I, SS34HE3_B/H, SS34HE3_B/I, SS34HM3_A/H, and SS34HM3_A/I maintain identical electrical specifications and automotive qualification. These parts differ only in packaging format (Tape & Reel) and inventory status, representing direct functional replacements.

Category 2: Cross-Manufacturer Equivalents (Active Status) Parts ACDBC340-HF and CDBC340-G from Comchip Technology, and 5822SMJ/TR13 and 5822SMJE3/TR13 from Microchip Technology satisfy all primary substitution criteria. Minor variations in forward voltage, reverse leakage, or operating temperature range are noted where they occur.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ 3A [mV]	Ir @ 40V [µA]	Package	Temp Range [°C]	AEC-Q101	RoHS3	Status
SS34-7000HE3_A/I	Vishay	40	3	500	500	DO-214AB	-55 to 150	Yes	Yes	Obsolete
SS34-3HE3_B/H	Vishay	40	3	500	500	DO-214AB	-55 to 150	Yes	Yes	Active
SS34-3HE3_B/I	Vishay	40	3	500	500	DO-214AB	-55 to 150	Yes	Yes	Active
SS34HE3_B/H	Vishay	40	3	500	500	DO-214AB	-55 to 150	Yes	Yes	Active
SS34HE3_B/I	Vishay	40	3	500	500	DO-214AB	-55 to 150	Yes	Yes	Active
SS34HM3_A/H	Vishay	40	3	500	500	DO-214AB	-55 to 150	Yes	Yes	Active
SS34HM3_A/I	Vishay	40	3	500	500	DO-214AB	-55 to 150	Yes	Yes	Active
ACDBC340-HF	Comchip	40	3	550	500	DO-214AB	-55 to 125	Yes	Yes	Active
CDBC340-G	Comchip	40	3	500	500	DO-214AB	-55 to 125	No	Yes	Active
5822SMJ/TR13	Microchip	40	3	500	1500	DO-214AB	-55 to 150	No	No	Active
5822SMJE3/TR13	Microchip	40	3	500	1500	DO-214AB	-55 to 150	Yes	Yes	Active

Engineering Selection Recommendations

Primary Recommendation: Vishay Parametric Equivalents

For direct replacement of the obsolete SS34-7000HE3_A/I, the Vishay parts SS34HE3_B/H and SS34HE3_B/I are preferred selections. These components maintain complete electrical and thermal equivalence, automotive grade qualification, AEC-Q101 certification, and ROHS3 compliance. Both parts are in active production status with substantial inventory availability (8,144 and 5,409 units respectively). The selection between these two variants depends on packaging format requirements (Tape & Reel format specified for both).

Secondary Recommendation: Comchip CDBC340-G

The Comchip CDBC340-G provides electrical equivalence with 40 V reverse voltage, 3 A current rating, and 500 mV forward voltage specification. This part maintains ROHS3 compliance and surface mount DO-214AB packaging. However, the maximum operating junction temperature is limited to 125°C compared to the 150°C rating of the primary recommendation. This part lacks AEC-Q101 qualification and is suitable only for non-automotive applications or where the reduced temperature range is acceptable.

Tertiary Recommendation: Microchip 5822SMJE3/TR13

The Microchip 5822SMJE3/TR13 satisfies all primary electrical specifications and maintains AEC-Q101 qualification and ROHS3 compliance. This part exhibits higher reverse leakage current (1.5 mA @ 40 V versus 500 µA @ 40 V), which may impact circuit performance in low-leakage applications. Selection of this part is appropriate where reverse leakage tolerance is not a critical design constraint.

Not Recommended: 5822SMJ/TR13

The Microchip 5822SMJ/TR13 lacks both AEC-Q101 qualification and ROHS3 compliance, disqualifying it from automotive applications and modern procurement standards.

Frequently Asked Questions (FAQ)

Q: Can SS34HE3_B/H and SS34HE3_B/I be used interchangeably with SS34-7000HE3_A/I?

A: Yes. Both Vishay parts maintain identical electrical specifications (40 V, 3 A, 500 mV forward voltage, 500 µA reverse leakage), automotive grade, AEC-Q101 qualification, and operating temperature range (-55°C to 150°C). The primary difference is packaging format (Tape & Reel) and production status (active versus obsolete).

Q: What is the significance of the forward voltage specification difference in ACDBC340-HF?

A: The ACDBC340-HF specifies 550 mV maximum forward voltage at 3 A, compared to 500 mV for the primary part. This 50 mV difference represents approximately 10% higher voltage drop across the diode during forward conduction. In applications where forward voltage drop is a critical design parameter (such as low-voltage rectification circuits), this difference may affect circuit performance and should be evaluated against specific design requirements.

Q: Why does the Microchip 5822SMJE3/TR13 show higher reverse leakage current?

A: The 5822SMJE3/TR13 specifies 1.5 mA reverse leakage at 40 V, compared to 500 µA for the Vishay parts. This three-fold increase in leakage current is a characteristic difference between manufacturers and device families. Applications requiring minimal reverse leakage (such as precision rectification or low-power circuits) should prioritize the Vishay equivalents.

Q: Is the reduced operating temperature range of Comchip parts a limiting factor?

A: The Comchip ACDBC340-HF and CDBC340-G specify maximum junction temperature of 125°C, compared to 150°C for the primary Vishay recommendation. For applications operating at or near the upper temperature limit, the Vishay parts provide additional thermal margin. For standard industrial and automotive applications operating within -55°C to 125°C, the Comchip parts are functionally equivalent.

Q: What packaging format differences exist among the substitute parts?

A: All substitute parts utilize DO-214AB (SMC) surface mount packaging, maintaining mechanical compatibility with the original SS34-7000HE3_A/I footprint. Packaging format variations (Tape & Reel versus Cut Tape & Digi-Reel) affect only procurement and handling; electrical and mechanical performance remain identical.

Q: Which substitute part is recommended for new automotive designs?

A: For new automotive designs, select either SS34HE3_B/H or SS34HE3_B/I from Vishay. Both parts maintain AEC-Q101 qualification, automotive grade designation, and ROHS3 compliance. The Microchip 5822SMJE3/TR13 is also AEC-Q101 qualified and ROHS3 compliant but exhibits higher reverse leakage current. Comchip parts lack AEC-Q101 qualification and are not suitable for automotive applications.

Q: Can these parts be used in high-reliability applications?

A: Parts with AEC-Q101 qualification (SS34HE3_B/H, SS34HE3_B/I, SS34HM3_A/H, SS34HM3_A/I, ACDBC340-HF, and 5822SMJE3/TR13) are qualified for automotive and high-reliability applications. Parts lacking AEC-Q101 qualification (CDBC340-G and 5822SMJ/TR13) are not suitable for high-reliability or automotive use.

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