STTH20R04FP Equivalent & Substitute Parts

Part Overview

The STTH20R04FP is a general-purpose rectifier diode manufactured by STMicroelectronics, rated for 400 V DC reverse voltage and 20 A average rectified current in a Through Hole TO-220FPAC package. This component is classified as Obsolete, necessitating identification of equivalent and substitute parts for ongoing design requirements and procurement needs. Substitute parts must maintain electrical compatibility within the specified voltage and current parameters while accommodating available packaging and product status constraints.

Substiute Parts

STTH20R04FP

STMicroelectronicsIn Stock: 2045STTH20R04FP Datasheet

Current PartRFQ

STTH2004FP

STMicroelectronicsIn Stock: 773STTH2004FP Datasheet

MFR RecommendedRFQ

DPG15I400PM

IXYSIn Stock: 1202DPG15I400PM Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the STTH20R04FP are identified based on the following electrical and mechanical compatibility criteria:

Primary Substitution Criteria:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 400 V
• Mounting Type: Must be Through Hole
• Package / Case: Must be TO-220-2 Full Pack or compatible variant
• Speed Classification: Must be Fast Recovery ≤ 500ns, > 200mA (Io)
• RoHS Status: Must maintain ROHS3 Compliance

Current Rating Consideration: Current - Average Rectified (Io) may be equal to or greater than 20 A. Parts with lower current ratings (15 A) are classified as similar substitutes due to reduced current capacity, which may require circuit re-evaluation depending on application requirements.

Substitute Categories:

1. MFR Recommended Substitute (STTH2004FP): Same manufacturer, same voltage class, same package family, active product status.

2. Similar Substitute (DPG15I400PM): Different manufacturer (IXYS), same voltage class, compatible package, active product status, reduced current rating (15 A vs. 20 A).

Parameter Comparison

Engineering Selection Recommendations

STTH2004FP (MFR Recommended Substitute): This part is the primary substitute option. It is manufactured by STMicroelectronics, the same original equipment manufacturer as the STTH20R04FP. The part maintains Active product status, ensuring long-term availability and supply chain stability. Full electrical parameter specifications are not provided in the available data; however, the designation within the same STTH series and manufacturer recommendation indicate electrical compatibility. ROHS3 compliance and REACH Unaffected status are maintained. This substitute is suitable for direct replacement in applications where the original part specifications are met.

DPG15I400PM (Similar Substitute): This part is manufactured by IXYS and is classified as a similar substitute due to reduced average rectified current (15 A versus 20 A). The part maintains 400 V DC reverse voltage rating, Fast Recovery speed classification, and identical 45 ns reverse recovery time. The DPG15I400PM exhibits superior reverse leakage characteristics (1 µA @ 400 V versus 20 µA @ 400 V) and lower forward voltage drop (1.39 V @ 15 A). The part features an Isolated Tab variant of the TO-220-2 package and an extended operating temperature range (-55°C ~ 175°C). Active product status and full compliance certifications (ROHS3, REACH Unaffected) are confirmed. Selection of this substitute requires circuit evaluation to confirm that the 15 A current rating is adequate for the application.

Frequently Asked Questions (FAQ)

Q: Can STTH2004FP be used as a direct replacement for STTH20R04FP?

A: STTH2004FP is the manufacturer-recommended substitute. Both parts are manufactured by STMicroelectronics and belong to the same STTH series. The recommendation indicates electrical compatibility; however, complete parameter specifications for STTH2004FP are not provided in the available documentation. Verification against application requirements is necessary.

Q: What is the primary difference between STTH2004FP and DPG15I400PM?

A: STTH2004FP is manufactured by STMicroelectronics (same as the original part), while DPG15I400PM is manufactured by IXYS. The DPG15I400PM has a reduced current rating (15 A versus 20 A) but offers improved reverse leakage performance (1 µA versus 20 µA) and lower forward voltage drop. Both maintain 400 V voltage rating and 45 ns reverse recovery time.

Q: Can DPG15I400PM be used in applications requiring 20 A current?

A: DPG15I400PM is rated for 15 A average rectified current. Use in applications requiring 20 A operation exceeds the component's rated capacity. Circuit evaluation is required to determine if 15 A operation is acceptable for the specific application.

Q: Are the package variants (TO-220FPAC, TO-220ACFP) interchangeable?

A: Both packages are TO-220-2 Full Pack configurations with Through Hole mounting. The DPG15I400PM features an Isolated Tab variant. Physical compatibility with PCB layouts and thermal management requirements must be confirmed. Consult package datasheets for dimensional specifications and pin configurations.

Q: Do all substitute parts maintain the same compliance certifications?

A: Yes. STTH2004FP and DPG15I400PM both maintain ROHS3 compliance and REACH Unaffected status, matching the original STTH20R04FP specifications.

Q: What is the significance of the Obsolete product status for STTH20R04FP?

A: Obsolete status indicates that the original part is no longer manufactured or supported by STMicroelectronics. Substitute parts with Active product status ensure continued availability, supply chain reliability, and manufacturer support for future procurement and technical inquiries.

Q: How do reverse leakage characteristics differ between the main part and substitutes?

A: STTH20R04FP exhibits 20 µA reverse leakage at 400 V. DPG15I400PM exhibits superior performance at 1 µA reverse leakage at 400 V. Lower reverse leakage reduces standby power dissipation and improves circuit efficiency in certain applications. STTH2004FP reverse leakage specifications are not provided.

Q: Are there thermal considerations when selecting between these parts?

A: STTH20R04FP specifies a maximum junction temperature of 175°C. DPG15I400PM specifies an operating temperature range of -55°C ~ 175°C, providing extended low-temperature capability. Thermal management and heat dissipation requirements depend on application current levels and duty cycles. The 15 A rating of DPG15I400PM may result in lower power dissipation compared to 20 A operation of the original part.