SS34-3HE3_B/I Equivalent & Substitute Parts

Part Overview

The SS34-3HE3_B/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 component is classified as Active product status and carries AEC-Q101 automotive qualification. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to supply constraints, design flexibility, or manufacturing preferences while maintaining identical functional specifications.

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)	—
Mounting Type	Surface Mount	—
Package / Case	DO-214AB, SMC	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the SS34-3HE3_B/I are qualified based on the following electrical and mechanical 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
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type: Surface Mount
Package / Case: DO-214AB, SMC
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

All identified substitute parts maintain these core electrical specifications and package compatibility. Variations in Current - Reverse Leakage @ Vr and Capacitance @ Vr, F are permitted within the scope of functional equivalence. Operating temperature range and automotive qualification status are noted where applicable but do not preclude substitution when electrical parameters align.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [mV @ A]	Speed	Ir @ Vr [µA / mA @ V]	Package	Temp Range [°C]	AEC-Q101	Inventory [Pcs]
SS34-3HE3_B/I	Vishay General Semiconductor	40	3	500 @ 3	Fast Recovery ≤ 500ns	500 µA @ 40 V	DO-214AB, SMC	-55 to 150	Yes	877
SS34HE3_B/H	Vishay General Semiconductor	40	3	500 @ 3	Fast Recovery ≤ 500ns	500 µA @ 40 V	DO-214AB, SMC	-55 to 150	Yes	8144
SS34HE3_B/I	Vishay General Semiconductor	40	3	500 @ 3	Fast Recovery ≤ 500ns	500 µA @ 40 V	DO-214AB, SMC	-55 to 150	Yes	5409
CDBC340-G	Comchip Technology	40	3	500 @ 3	Fast Recovery ≤ 500ns	500 µA @ 40 V	DO-214AB, SMC	-55 to 125	No	3700
5822SMJE3/TR13	Microchip Technology	40	3	500 @ 3	Fast Recovery ≤ 500ns	1.5 mA @ 40 V	DO-214AB, SMC	-55 to 150	No	6550
B340CE-13	Diodes Incorporated	40	3	500 @ 3	Fast Recovery ≤ 500ns	200 µA @ 40 V	DO-214AB, SMC	-55 to 150	No	4300
B340Q-13-F	Diodes Incorporated	40	3	500 @ 3	Fast Recovery ≤ 500ns	500 µA @ 40 V	DO-214AB, SMC	-55 to 150	Yes	18040
SK34-AU_R1_000A1	Panjit International Inc.	40	3	500 @ 3	Fast Recovery ≤ 500ns	200 µA @ 40 V	DO-214AB, SMC	-55 to 150	Yes	1256
SK34-TP	Micro Commercial Co	40	3	500 @ 3	Fast Recovery ≤ 500ns	500 µA @ 40 V	DO-214AB, SMC	-55 to 150	No	2400
SK34_R1_00001	Panjit International Inc.	40	3	500 @ 3	Fast Recovery ≤ 500ns	200 µA @ 40 V	DO-214AB, SMC	-55 to 150	No	53300
SS34	MDD	40	3	—	Fast Recovery ≤ 500ns	500 µA @ 40 V	DO-214AC, SMA	-55 to 125	No	605100

Engineering Selection Recommendations

Automotive-Qualified Substitutes (AEC-Q101): Parts SS34HE3_B/H, SS34HE3_B/I, B340Q-13-F, SK34-AU_R1_000A1, and SK34_R1_00001 carry AEC-Q101 qualification, matching the automotive-grade status of the primary part SS34-3HE3_B/I. These substitutes are suitable for applications requiring automotive compliance documentation.

Extended Temperature Range: Parts SS34-3HE3_B/I, SS34HE3_B/H, SS34HE3_B/I, 5822SMJE3/TR13, B340CE-13, B340Q-13-F, SK34-AU_R1_000A1, SK34-TP, and SK34_R1_00001 support the full -55°C to 150°C operating temperature range. CDBC340-G and SS34 are limited to -55°C to 125°C maximum junction temperature.

Reverse Leakage Characteristics: The primary part specifies 500 µA @ 40 V reverse leakage. Substitutes with lower reverse leakage (B340CE-13 at 200 µA, SK34-AU_R1_000A1 at 200 µA, SK34_R1_00001 at 200 µA) provide improved leakage performance. The 5822SMJE3/TR13 exhibits higher reverse leakage at 1.5 mA @ 40 V.

Package Compatibility: All substitutes except SS34 maintain the DO-214AB (SMC) package form factor. The SS34 variant uses DO-214AC (SMA) package and is not mechanically compatible with DO-214AB footprints.

RoHS Compliance: All identified substitutes maintain ROHS3 compliance status consistent with the primary part.

Frequently Asked Questions (FAQ)

Q: Can SS34HE3_B/H and SS34HE3_B/I be used interchangeably with SS34-3HE3_B/I?

A: Yes. These Vishay parts share identical electrical specifications (40 V, 3 A, 500 mV forward voltage, fast recovery speed) and package configuration (DO-214AB, SMC). The primary difference is packaging format: SS34HE3_B/H and SS34HE3_B/I are supplied in Tape & Reel format, while SS34-3HE3_B/I uses standard packaging. All three carry AEC-Q101 automotive qualification and support -55°C to 150°C operating range.

Q: Is B340Q-13-F suitable for automotive applications?

A: Yes. B340Q-13-F from Diodes Incorporated carries AEC-Q101 automotive qualification and meets all electrical parameters of the primary part (40 V, 3 A, 500 mV forward voltage). It supports the full -55°C to 150°C temperature range and maintains ROHS3 compliance.

Q: What is the difference between SK34-AU_R1_000A1 and SK34_R1_00001?

A: Both are Panjit International SK34 variants with identical electrical specifications and AEC-Q101 qualification. The primary distinction is reverse leakage specification: SK34-AU_R1_000A1 specifies 200 µA @ 40 V, while SK34_R1_00001 does not provide capacitance data. SK34_R1_00001 has significantly higher inventory availability (53,300 pcs vs. 1,256 pcs).

Q: Why is SS34 (MDD) listed as a substitute if it uses a different package?

A: SS34 uses DO-214AC (SMA) package, which is mechanically incompatible with the DO-214AB (SMC) footprint of the primary part. This part is not recommended for direct substitution in existing designs. It is included for reference only when package migration is acceptable.

Q: Does CDBC340-G from Comchip Technology meet all requirements?

A: CDBC340-G meets all electrical specifications (40 V, 3 A, 500 mV forward voltage, fast recovery) and package requirements (DO-214AB, SMC). However, it lacks AEC-Q101 automotive qualification and supports a reduced temperature range (-55°C to 125°C maximum). Use is restricted to non-automotive applications or where automotive qualification is not required.

Q: What is the significance of reverse leakage variation among substitutes?

A: Reverse leakage current affects power dissipation and circuit performance in high-impedance applications. The primary part specifies 500 µA @ 40 V. Substitutes with lower reverse leakage (200 µA) provide improved efficiency. The 5822SMJE3/TR13 with 1.5 mA reverse leakage exhibits higher leakage and may not be suitable for applications sensitive to standby current.

Q: Can SK34-TP be used in automotive designs?

A: SK34-TP from Micro Commercial Co meets all electrical specifications and package requirements but does not carry AEC-Q101 automotive qualification. Use is limited to non-automotive applications or designs where automotive certification is not mandated.

Q: Are all substitutes RoHS compliant?

A: Yes. All identified substitute parts maintain ROHS3 compliance status, consistent with the primary part SS34-3HE3_B/I.

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