STTH20W02CW Equivalent & Substitute Parts

Part Overview

The STTH20W02CW is a fast recovery diode array manufactured by STMicroelectronics, configured as a 1 Pair Common Cathode rectifier with 200 V reverse voltage rating and 10 A average rectified current per diode. The device is packaged in TO-247-3 through-hole format and is classified as obsolete. Due to its obsolete product status, equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production and repair applications.

Substiute Parts

STTH20W02CW

STMicroelectronicsIn Stock: 1453STTH20W02CW Datasheet

Current PartRFQ

STTH30W02CW

STMicroelectronicsIn Stock: 1286STTH30W02CW Datasheet

DirectRFQ

SDUR2020WT

SMC Diode SolutionsIn Stock: 1214SDUR2020WT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the STTH20W02CW are selected based on strict electrical and mechanical parameter compatibility. The primary substitution criteria are:

Mandatory Matching Parameters:

• Voltage - DC Reverse (Vr) (Max): 200 V
• Diode Configuration: 1 Pair Common Cathode
• Package / Case: TO-247-3
• Mounting Type: Through Hole
• Speed Classification: Fast Recovery

Current Rating Consideration: Substitute parts must maintain equal or higher average rectified current (Io) per diode to ensure functional equivalence. The STTH20W02CW operates at 10 A; substitutes rated at 10 A or higher satisfy this requirement.

Forward Voltage Compatibility: Forward voltage drop (Vf) at rated current must be within acceptable operating parameters for the application circuit. Variations in Vf do not preclude substitution when other electrical parameters align.

Reverse Recovery Time: Fast recovery classification (≤ 500ns) is maintained across all substitute options to preserve switching performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

STTH30W02CW (Direct Substitute - Recommended)

The STTH30W02CW is the primary substitute for the obsolete STTH20W02CW. Both devices are manufactured by STMicroelectronics and share identical voltage ratings (200 V), diode configuration (1 Pair Common Cathode), package format (TO-247-3), and thermal specifications (175°C max junction temperature). The STTH30W02CW provides 15 A average rectified current per diode, exceeding the 10 A requirement of the original part. This higher current rating ensures functional compatibility in applications designed for the STTH20W02CW. Both parts maintain ROHS3 compliance and identical moisture sensitivity levels. The STTH30W02CW is currently in active production status, ensuring long-term availability.

SDUR2020WT (Similar Substitute - Alternative Option)

The SDUR2020WT, manufactured by SMC Diode Solutions, provides an alternative substitute option. This device maintains the 200 V reverse voltage rating, 1 Pair Common Cathode configuration, TO-247-3 package, and fast recovery speed classification. The SDUR2020WT exhibits a lower forward voltage drop (1.05 V @ 10 A) compared to the STTH20W02CW (1.2 V @ 10 A), which may provide thermal efficiency benefits in certain applications. However, the SDUR2020WT has a maximum junction temperature of 150°C, which is 25°C lower than the STTH20W02CW specification. This thermal limitation must be evaluated against application requirements. The SDUR2020WT is currently in active production status and maintains ROHS3 compliance. REACH status differs from the main part (REACH Affected versus REACH Unaffected), which may impact regulatory compliance in specific jurisdictions.

Frequently Asked Questions (FAQ)

Q: Can the STTH30W02CW directly replace the STTH20W02CW in existing designs?

A: Yes. The STTH30W02CW is electrically and mechanically compatible with the STTH20W02CW. Both devices share identical reverse voltage ratings (200 V), diode configuration (1 Pair Common Cathode), package format (TO-247-3), and thermal specifications (175°C max junction temperature). The higher current rating (15 A versus 10 A) of the STTH30W02CW provides additional design margin and does not create compatibility issues.

Q: What is the primary difference between the STTH30W02CW and SDUR2020WT?

A: The STTH30W02CW and SDUR2020WT differ in forward voltage characteristics, reverse recovery time, and maximum junction temperature. The STTH30W02CW exhibits 1.2 V forward voltage at 15 A with 25 ns reverse recovery time and 175°C maximum junction temperature. The SDUR2020WT exhibits 1.05 V forward voltage at 10 A with 35 ns reverse recovery time and 150°C maximum junction temperature. Both maintain 200 V reverse voltage rating and TO-247-3 packaging.

Q: Are there thermal considerations when substituting the STTH20W02CW?

A: The STTH30W02CW maintains the same maximum junction temperature (175°C) as the STTH20W02CW, requiring no thermal design modifications. The SDUR2020WT has a lower maximum junction temperature (150°C), which may require thermal evaluation in high-temperature applications. Forward voltage differences (1.2 V for STTH devices versus 1.05 V for SDUR2020WT) affect power dissipation and should be considered in thermal calculations.

Q: Do substitute parts maintain the same package footprint?

A: Yes. All substitute parts use the TO-247-3 package format with through-hole mounting, ensuring identical PCB footprint and mechanical compatibility with designs originally specified for the STTH20W02CW.

Q: What is the significance of the obsolete product status of the STTH20W02CW?

A: The obsolete status indicates that the STTH20W02CW is no longer manufactured by STMicroelectronics and existing inventory is limited. The STTH30W02CW and SDUR2020WT are both in active production status, ensuring reliable long-term component availability for new designs and repair applications.

Q: Are compliance certifications maintained across substitute parts?

A: The STTH30W02CW maintains identical compliance certifications to the STTH20W02CW (ROHS3 Compliant, Moisture Sensitivity Level 1, REACH Unaffected). The SDUR2020WT is ROHS3 Compliant with Moisture Sensitivity Level 1 but has REACH Affected status, which may impact regulatory compliance in specific applications or jurisdictions.