SS34-3HE3/9AT Equivalent & Substitute Parts

Part Overview

The SS34-3HE3/9AT 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 surface mount DO-214AB (SMC) package. This component is classified as Active and complies with ROHS3 and REACH standards. Equivalent and substitute parts are identified based on matching electrical specifications and mechanical compatibility to support design flexibility, supply chain alternatives, and packaging options.

Key Parameters

Parameter	Value
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 ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr	500 µA @ 40 V
Mounting Type	Surface Mount
Package / Case	DO-214AB, SMC
Operating Temperature - Junction	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SS34-3HE3/9AT are qualified based on the following critical parameters:

Electrical Equivalence 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 ≤ 500 ns, > 200 mA (Io)
Current - Reverse Leakage @ Vr: 500 µA @ 40 V
Technology: Schottky

Mechanical Compatibility Criteria:

Mounting Type: Surface Mount
Package / Case: DO-214AB, SMC
Operating Temperature - Junction: -55°C ~ 125°C (minimum range)

Compliance Criteria:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are differentiated by manufacturer, packaging format (Cut Tape, Tape & Reel, Digi-Reel), and product status. All listed substitutes meet the electrical and mechanical requirements for direct functional replacement.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Speed	Ir @ Vr	Package	Temp Range	Product Status	Packaging Format
SS34-3HE3/9AT	Vishay General Semiconductor - Diodes Division	40 V	3 A	500 mV @ 3 A	Fast Recovery ≤ 500 ns, > 200 mA	500 µA @ 40 V	DO-214AB, SMC	-55°C ~ 125°C	Active	Tape & Reel (TR)
SS34-E3/57T	Vishay General Semiconductor - Diodes Division	40 V	3 A	500 mV @ 3 A	Fast Recovery ≤ 500 ns, > 200 mA	500 µA @ 40 V	DO-214AB, SMC	-55°C ~ 125°C	Active	Cut Tape (CT)
SS34-E3/9AT	Vishay General Semiconductor - Diodes Division	40 V	3 A	500 mV @ 3 A	Fast Recovery ≤ 500 ns, > 200 mA	500 µA @ 40 V	DO-214AB, SMC	-55°C ~ 125°C	Active	Tape & Reel (TR)
CDBC340-G	Comchip Technology	40 V	3 A	500 mV @ 3 A	Fast Recovery ≤ 500 ns, > 200 mA	500 µA @ 40 V	DO-214AB, SMC	-55°C to 125°C (Max)	Active	Tape & Reel (TR)
B340-13-F	Diodes Incorporated	40 V	3 A	500 mV @ 3 A	Fast Recovery ≤ 500 ns, > 200 mA	500 µA @ 40 V	DO-214AB, SMC	-55°C ~ 125°C	Active	Cut Tape (CT) & Digi-Reel®
SS34 V7G	Taiwan Semiconductor Corporation	40 V	3 A	500 mV @ 3 A	Fast Recovery ≤ 500 ns, > 200 mA	500 µA @ 40 V	DO-214AB, SMC	-55°C ~ 125°C	Discontinued at DiGi Electronics	Not specified

Engineering Selection Recommendations

Active Status Parts (Recommended for New Designs):

SS34-E3/57T, SS34-E3/9AT, CDBC340-G, and B340-13-F are all classified as Active and suitable for new design implementations. These parts meet all electrical and mechanical equivalence criteria and maintain ROHS3 compliance and MSL 1 rating.

Packaging Format Selection:

Tape & Reel (TR): SS34-3HE3/9AT, SS34-E3/9AT, CDBC340-G — suitable for high-volume automated assembly
Cut Tape (CT): SS34-E3/57T, B340-13-F — suitable for lower-volume or mixed-component orders
Digi-Reel®: B340-13-F — alternative packaging option from Diodes Incorporated

Manufacturer Alternatives:

Vishay General Semiconductor - Diodes Division: SS34-3HE3/9AT, SS34-E3/57T, SS34-E3/9AT (same manufacturer, multiple packaging options)
Comchip Technology: CDBC340-G (alternative manufacturer, Active status)
Diodes Incorporated: B340-13-F (alternative manufacturer, Active status, includes capacitance specification of 200 pF @ 4 V, 1 MHz)

Discontinued Part:

SS34 V7G from Taiwan Semiconductor Corporation is classified as Discontinued at DiGi Electronics and is not recommended for new designs or long-term supply chain planning.

Frequently Asked Questions (FAQ)

Q: Can SS34-E3/57T replace SS34-3HE3/9AT directly?

A: Yes. Both parts are manufactured by Vishay General Semiconductor - Diodes Division and share identical electrical specifications (40 V, 3 A, 500 mV forward voltage, fast recovery ≤ 500 ns, 500 µA reverse leakage). The difference is packaging format: SS34-E3/57T is supplied in Cut Tape (CT) while SS34-3HE3/9AT is supplied in Tape & Reel (TR). Selection depends on assembly process requirements.

Q: What is the difference between CDBC340-G and B340-13-F?

A: Both are electrically equivalent to SS34-3HE3/9AT with identical voltage, current, and speed ratings. CDBC340-G is manufactured by Comchip Technology and supplied in Tape & Reel format. B340-13-F is manufactured by Diodes Incorporated and supplied in Cut Tape and Digi-Reel formats. B340-13-F includes a specified junction capacitance of 200 pF @ 4 V, 1 MHz, while CDBC340-G does not specify this parameter.

Q: Is SS34 V7G a suitable substitute?

A: SS34 V7G meets all electrical and mechanical equivalence criteria; however, it is classified as Discontinued at DiGi Electronics. This part is not recommended for new designs or applications requiring long-term supply chain availability.

Q: Do all substitute parts comply with RoHS and REACH requirements?

A: Yes. All listed substitute parts are ROHS3 Compliant and REACH Unaffected, matching the compliance status of the main part SS34-3HE3/9AT.

Q: What is the Moisture Sensitivity Level (MSL) for all substitute parts?

A: All substitute parts, including the main part, have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage and handling.

Q: Can I use B340-13-F if my design requires a specific capacitance specification?

A: B340-13-F specifies a junction capacitance of 200 pF @ 4 V, 1 MHz. Other substitute parts do not provide capacitance specifications in the available data. If capacitance is a critical design parameter, B340-13-F is the only substitute with this specification documented.

Q: Which substitute part has the highest inventory availability?

A: SS34-E3/57T has the highest inventory with 123,110 pieces in stock, followed by B340-13-F with 51,465 pieces. SS34-3HE3/9AT has 937 pieces available.

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