SSL34 Schottky Diode Equivalent & Substitute Parts

Part Overview

The SSL34 is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, 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 product status and is ROHS3 compliant. Equivalent and substitute parts are identified based on matching electrical specifications, package compatibility, and thermal operating ranges to ensure functional interchangeability in circuit applications.

Substiute Parts

SSL34

Taiwan Semiconductor CorporationIn Stock: 9406SSL34 Datasheet

Current PartRFQ

SSL34

Taiwan Semiconductor CorporationIn Stock: 9406SSL34 Datasheet

DirectRFQ

30BQ040

SMC Diode SolutionsIn Stock: 917230BQ040 Datasheet

DirectRFQ

SK34

Good-Ark SemiconductorIn Stock: 26697SK34 Datasheet

DirectRFQ

B340-13-F

Diodes IncorporatedIn Stock: 51481B340-13-F Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SSL34 is determined by the following critical parameters:

Mandatory Matching Criteria:

• Technology: Schottky
• Voltage - DC Reverse (Vr) (Max): 40 V
• Current - Average Rectified (Io): 3 A
• Package / Case: DO-214AB, SMC
• Mounting Type: Surface Mount
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)

Acceptable Variation Criteria:

• Operating Temperature - Junction: Equal to or exceeding -55°C ~ 125°C range
• Current - Reverse Leakage @ Vr: Within specified limits at 40 V
• Voltage - Forward (Vf) (Max) @ If: Minor variations acceptable within typical Schottky diode performance envelope
• Capacitance @ Vr, F: Variations acceptable based on application requirements

All identified substitute parts meet the mandatory matching criteria and are classified as Active product status with ROHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Identical Specifications): The SSL34 manufactured by Taiwan Semiconductor Corporation serves as the primary reference part. All substitute parts listed maintain Active product status and ROHS3 compliance, ensuring regulatory alignment with the original component.

Substitute Selection Criteria:

30BQ040 (SMC Diode Solutions): This part matches the 40 V reverse voltage and fast recovery speed specifications. The operating temperature range extends to 150°C, providing enhanced thermal margin. Note that REACH Status is listed as REACH Affected, which may require additional compliance verification in regulated supply chains. Current - Average Rectified (Io) is not specified in available documentation.

SK34 (Good-Ark Semiconductor): This substitute provides identical 40 V reverse voltage and 3 A current ratings with extended operating temperature range to 150°C. Forward voltage is specified at 550 mV @ 3 A, and reverse leakage current is lower at 200 µA @ 40 V compared to the SSL34. REACH Status is REACH Unaffected, maintaining full regulatory compliance.

B340-13-F (Diodes Incorporated): This part matches all critical electrical parameters: 40 V reverse voltage, 3 A current rating, and fast recovery speed. Forward voltage is specified at 500 mV @ 3 A, representing the lowest forward drop among substitute options. Operating temperature range matches the SSL34 at -55°C ~ 125°C. REACH Status is REACH Unaffected.

All substitute parts are suitable for direct replacement in applications where the SSL34 is specified, provided that circuit design accommodates minor variations in forward voltage and reverse leakage characteristics.

Frequently Asked Questions (FAQ)

Q: Can the 30BQ040 be used as a direct replacement for the SSL34?

A: The 30BQ040 matches the critical electrical specifications of 40 V reverse voltage and fast recovery speed in the DO-214AB SMC package. However, the Current - Average Rectified (Io) specification is not provided in available data. Substitution is permissible where circuit design does not depend on documented Io specifications. REACH Status differs (REACH Affected vs. REACH Unaffected), which may impact supply chain compliance requirements.

Q: What are the differences in forward voltage between substitute parts?

A: Forward voltage specifications vary among substitutes: 30BQ040 at 680 mV @ 3 A, SK34 at 550 mV @ 3 A, and B340-13-F at 500 mV @ 3 A. The SSL34 forward voltage is not specified in available documentation. These variations are within typical Schottky diode performance ranges and do not affect package or mounting compatibility. Circuit designs sensitive to forward voltage drop should account for these differences in power dissipation calculations.

Q: Are all substitute parts available in the same package?

A: All substitute parts are packaged in DO-214AB (SMC) Surface Mount configuration, matching the SSL34 package specification. Packaging options differ by supplier: SSL34 and SK34 are supplied in Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® formats respectively, while 30BQ040 and B340-13-F are supplied in Cut Tape (CT) & Digi-Reel® format. PCB footprint compatibility is identical across all parts.

Q: What is the significance of the extended operating temperature range in SK34 and 30BQ040?

A: SK34 and 30BQ040 specify operating temperature ranges extending to 150°C, compared to 125°C for SSL34 and B340-13-F. This extended range provides additional thermal margin in high-temperature applications. However, the SSL34 and B340-13-F remain suitable for applications within their specified -55°C ~ 125°C range.

Q: How do reverse leakage current specifications compare?

A: Reverse leakage current at 40 V is specified as 500 µA for SSL34, 30BQ040, and B340-13-F, while SK34 specifies 200 µA @ 40 V. Lower reverse leakage in SK34 may provide performance advantages in applications sensitive to leakage current, such as precision analog circuits or high-impedance applications.

Q: What is the impact of REACH Status differences?

A: The 30BQ040 is listed as REACH Affected, while SSL34, SK34, and B340-13-F are REACH Unaffected. REACH Affected status indicates the part may contain substances of concern requiring additional documentation and compliance verification. Organizations operating under strict REACH compliance requirements should prioritize REACH Unaffected alternatives (SK34 or B340-13-F) unless specific supply chain justification exists for 30BQ040 substitution.

Q: Are all parts ROHS3 compliant?

A: All listed parts, including SSL34, 30BQ040, SK34, and B340-13-F, are ROHS3 compliant. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all parts, indicating no moisture sensitivity restrictions during storage and handling.