SS34HM6G Equivalent & Substitute Parts

Part Overview

The SS34HM6G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, 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 substitute components for ongoing production and repair applications. The part carries automotive-grade qualification (AEC-Q101) and is RoHS3 compliant, making substitutes subject to the same compliance requirements.

Substiute Parts

SS34HM6G

Taiwan Semiconductor CorporationIn Stock: 919SS34HM6G Datasheet

Current PartRFQ

SS34H

Taiwan Semiconductor CorporationIn Stock: 749SS34H Datasheet

DirectRFQ

B340-13-F

Diodes IncorporatedIn Stock: 51481B340-13-F Datasheet

SimilarRFQ

CDBC340-G

Comchip TechnologyIn Stock: 3737CDBC340-G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SS34HM6G is determined by strict equivalence across the following electrical and mechanical parameters:

• Voltage Rating: DC reverse voltage must equal 40 V maximum
• Current Rating: Average rectified current must equal 3 A
• Forward Voltage Drop: Maximum forward voltage must equal 500 mV at 3 A
• Recovery Speed: Fast recovery characteristic ≤ 500ns for currents > 200mA
• Reverse Leakage: Maximum reverse leakage current must equal 500 µA at 40 V
• Package: Surface mount DO-214AB (SMC) package only
• Operating Temperature Range: Junction temperature range -55°C to 125°C minimum
• Compliance: RoHS3 compliance and automotive-grade qualification (AEC-Q101) required

All identified substitute parts meet these criteria. Differences in technology classification (Schottky versus standard rectifier) and packaging format (Tape & Reel versus Cut Tape) do not affect electrical substitutability when all rated parameters are equivalent.

Parameter Comparison

Engineering Selection Recommendations

SS34H (Taiwan Semiconductor Corporation): This part is the direct manufacturer equivalent from Taiwan Semiconductor Corporation. It maintains identical electrical specifications and automotive-grade AEC-Q101 qualification. Product status is active with confirmed inventory availability. This substitute is the primary selection for applications requiring continuity with the original manufacturer's product line.

B340-13-F (Diodes Incorporated): This part meets all electrical parameter requirements and maintains RoHS3 compliance. Product status is active with high inventory availability (51,465 units). This substitute is suitable for applications where manufacturer diversity is acceptable and where the automotive-grade qualification requirement can be satisfied through design validation or application-specific assessment.

CDBC340-G (Comchip Technology): This part meets all electrical parameter requirements and maintains RoHS3 compliance. Product status is active with confirmed inventory availability. This substitute is suitable for applications where manufacturer diversity is acceptable and where the automotive-grade qualification requirement can be satisfied through design validation or application-specific assessment.

All three substitute parts are electrically interchangeable with the SS34HM6G based on the provided specifications. Selection should prioritize product availability, supply chain requirements, and compliance certification status for the specific application context.

Frequently Asked Questions (FAQ)

Q: Can the SS34H be used as a direct replacement for the SS34HM6G?

A: Yes. The SS34H is manufactured by the same supplier (Taiwan Semiconductor Corporation) and maintains identical electrical specifications: 40 V reverse voltage, 3 A average rectified current, 500 mV forward voltage drop at 3 A, fast recovery speed, and 500 µA reverse leakage current. Both parts carry AEC-Q101 automotive qualification and are RoHS3 compliant. The primary difference is product status (SS34H is active; SS34HM6G is discontinued).

Q: What is the difference between the SS34HM6G (standard rectifier) and the SS34H (Schottky diode)?

A: Both parts meet the same electrical specifications for this application. The technology classification difference does not affect substitutability when all rated parameters are equivalent. Both deliver 40 V reverse voltage, 3 A current, and 500 mV forward voltage drop at 3 A.

Q: Are B340-13-F and CDBC340-G suitable substitutes if automotive qualification is required?

A: The B340-13-F and CDBC340-G meet all electrical parameter requirements and are RoHS3 compliant. However, automotive-grade qualification (AEC-Q101) is not specified for these parts. Substitution in automotive applications requires design validation or confirmation that the application does not mandate AEC-Q101 certification.

Q: Does the packaging format (Tape & Reel versus Cut Tape) affect electrical performance?

A: No. Packaging format affects only handling, storage, and assembly logistics. Electrical performance and substitutability are determined solely by the component specifications. All substitute parts are surface mount DO-214AB (SMC) packages and are electrically equivalent.

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

A: SS34HM6G, SS34H, and B340-13-F all specify -55°C to 125°C junction temperature range. CDBC340-G specifies a maximum junction temperature of 125°C. All parts meet the minimum operating temperature requirement of -55°C to 125°C.

Q: Can these parts be used interchangeably in PCB assembly?

A: Yes. All substitute parts use the identical DO-214AB (SMC) surface mount package. PCB footprints, solder reflow profiles, and assembly processes are compatible across all four parts.

Q: What inventory status should influence part selection?

A: SS34H has 673 units in stock, B340-13-F has 51,465 units in stock, and CDBC340-G has 3,700 units in stock. Availability should be evaluated against production volume and lead time requirements for the specific application.