SDURB520 Equivalent & Substitute Parts

Part Overview

The SDURB520 is a general-purpose rectifier diode manufactured by SMC Diode Solutions, rated for 200 V DC reverse voltage and packaged in a D2PAK surface mount configuration. This diode is designed for fast recovery applications with a reverse recovery time of 35 ns and operates across a junction temperature range of -55°C to 150°C. The part is currently active in production status with RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity when the primary part becomes unavailable or when alternative sourcing is required.

Substiute Parts

SDURB520

SMC Diode SolutionsIn Stock: 1737SDURB520 Datasheet

Current PartRFQ

STTH2002G-TR

STMicroelectronicsIn Stock: 1584STTH2002G-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SDURB520 are identified based on electrical and mechanical compatibility within the rectifier diode category. The substitution criteria are strictly limited to the following parameters:

Primary Substitution Criteria:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 200 V
• Package / Case: Must be TO-263-3, D2PAK (2 Leads + Tab) configuration
• Mounting Type: Must be Surface Mount
• Speed Classification: Must meet Fast Recovery ≤ 500ns, > 200mA (Io) requirement
• Current - Reverse Leakage @ Vr: Must not exceed 10 µA @ 200 V
• RoHS Status: Must maintain ROHS3 Compliance
• Moisture Sensitivity Level (MSL): Must be rated at MSL 1 or equivalent

Secondary Compatibility Factors:

• Operating Temperature Range: Substitute must support the application's thermal requirements
• Reverse Recovery Time (trr): Substitute performance must be compatible with circuit switching characteristics
• Forward Voltage (Vf): Substitute must be suitable for the intended current application

The STTH2002G-TR meets all primary substitution criteria and is therefore classified as an equivalent substitute part.

Parameter Comparison

Engineering Selection Recommendations

STTH2002G-TR as Substitute for SDURB520:

The STTH2002G-TR is a direct substitute for the SDURB520 based on electrical and mechanical parameter alignment. Both parts share identical voltage ratings (200 V DC reverse), fast recovery speed classification, reverse leakage characteristics, and D2PAK surface mount packaging. Both parts maintain ROHS3 compliance and MSL 1 rating, ensuring regulatory and environmental compatibility.

The STTH2002G-TR demonstrates higher current capacity (20 A average rectified current) and extended maximum junction temperature rating (175°C versus 150°C), providing enhanced thermal and current handling margins. The reverse recovery time of the substitute (40 ns) remains within acceptable fast recovery parameters and differs minimally from the main part (35 ns).

Both parts are currently in active production status with established supply chains. Selection between these parts should be based on application-specific current requirements, thermal environment, and procurement availability.

Frequently Asked Questions (FAQ)

Q: Can the STTH2002G-TR be used as a direct replacement for the SDURB520 in existing designs?

A: Yes. Both parts share identical voltage ratings, package configurations (D2PAK), mounting types (surface mount), and fast recovery speed classifications. The D2PAK footprint and pinout are identical, allowing direct PCB substitution without layout modifications.

Q: What are the key differences between these two diodes?

A: The primary differences are manufacturer origin (SMC Diode Solutions versus STMicroelectronics), average rectified current rating (not specified for SDURB520 versus 20 A for STTH2002G-TR), forward voltage characteristics at different current levels, reverse recovery time (35 ns versus 40 ns), and maximum junction temperature (150°C versus 175°C). The STTH2002G-TR offers higher current capacity and thermal headroom.

Q: Are there any compliance or regulatory differences between these parts?

A: Both parts are ROHS3 compliant and carry MSL 1 (unlimited) moisture sensitivity ratings. The SDURB520 is REACH Affected, while the STTH2002G-TR is REACH Unaffected. Both carry EAR99 ECCN classification and identical HTSUS codes (8541.10.0080).

Q: Does the D2PAK package ensure mechanical compatibility?

A: Yes. Both parts use the TO-263-3 D2PAK (2 Leads + Tab) package configuration. This ensures identical footprint, lead spacing, and thermal pad dimensions for direct PCB substitution without design changes.

Q: What should be considered when selecting between these parts for a new design?

A: Selection should be based on application current requirements, thermal environment, and supply chain availability. The STTH2002G-TR is suitable for higher current applications and environments with elevated ambient temperatures due to its 20 A rating and 175°C maximum junction temperature. The SDURB520 is appropriate for lower current applications within its specified operating range.

Q: Are the forward voltage characteristics interchangeable?

A: The forward voltage characteristics differ at different current levels. The SDURB520 is specified at 975 mV @ 5 A, while the STTH2002G-TR is specified at 1.1 V @ 20 A. Circuit designs dependent on specific forward voltage performance at particular current levels should verify compatibility with the substitute part's characteristics.

Q: What is the significance of the reverse recovery time difference?

A: Both parts meet the fast recovery classification (≤ 500ns, > 200mA). The 5 ns difference (35 ns versus 40 ns) is minimal and does not affect fast recovery performance classification. Applications with strict switching speed requirements should verify that 40 ns recovery time is acceptable for their specific circuit design.