STTH4R02D Equivalent & Substitute Parts

Part Overview

The STTH4R02D is a general-purpose rectifier diode manufactured by STMicroelectronics, rated for 200 V DC reverse voltage and 4 A average rectified current. The device features fast recovery characteristics with a reverse recovery time of 30 ns and is housed in a TO-220AC through-hole package. This part is classified as obsolete, making identification of suitable substitute components necessary for ongoing design support and procurement planning. The STTH4R02D remains available in inventory with 882 pieces in stock.

Substiute Parts

STTH4R02D

STMicroelectronicsIn Stock: 965STTH4R02D Datasheet

Current PartRFQ

STTH802D

STMicroelectronicsIn Stock: 13958STTH802D Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the STTH4R02D is determined by the following critical electrical and mechanical parameters:

Voltage Rating Compatibility: The substitute part must maintain the same maximum DC reverse voltage rating of 200 V to ensure circuit protection and reliability in the intended application.

Current Rating Consideration: While the STTH4R02D is rated for 4 A average rectified current, substitute parts with equal or higher current ratings are electrically compatible, as they can safely handle the specified current without exceeding thermal or electrical limits.

Forward Voltage Characteristics: The forward voltage drop at the specified current must remain consistent to preserve circuit performance and power dissipation calculations.

Recovery Speed Classification: The part must maintain fast recovery characteristics (≤ 500 ns) to ensure compatibility with switching applications and minimize reverse recovery losses.

Package and Mounting: The substitute must use the same TO-220-2 package configuration with through-hole mounting to ensure mechanical and thermal compatibility with existing PCB designs.

Compliance and Status: Active product status and maintained RoHS3 compliance ensure long-term availability and regulatory adherence.

Parameter Comparison

Engineering Selection Recommendations

The STTH802D serves as a direct substitute for the STTH4R02D based on electrical and mechanical compatibility. Both devices share identical voltage ratings, recovery characteristics, package configuration, and thermal specifications. The STTH802D provides enhanced current capacity at 8 A compared to the 4 A rating of the STTH4R02D, making it suitable for applications requiring the original part's performance envelope.

The STTH802D holds active product status with ROHS3 compliance, ensuring continued availability and regulatory adherence. This contrasts with the obsolete status of the STTH4R02D, making the STTH802D the preferred choice for new designs and long-term procurement strategies.

The slightly elevated reverse leakage current in the STTH802D (6 µA versus 3 µA at 200 V) remains within acceptable engineering tolerances for general-purpose rectification applications and does not compromise circuit functionality.

Frequently Asked Questions (FAQ)

Q: Can the STTH802D directly replace the STTH4R02D in existing circuits?

A: Yes. Both devices share identical voltage ratings (200 V), forward voltage characteristics (1.05 V), recovery time (30 ns), package configuration (TO-220-2), and thermal specifications (175°C junction temperature). The STTH802D's higher current rating (8 A) is compatible with applications designed for the 4 A STTH4R02D.

Q: What is the significance of the higher current rating in the STTH802D?

A: The STTH802D is rated for 8 A average rectified current, compared to 4 A for the STTH4R02D. This higher rating provides additional design margin and allows the substitute to handle the original part's specified current without thermal stress. No circuit modification is required.

Q: Are there packaging differences between these parts?

A: No. Both the STTH4R02D and STTH802D use the TO-220-2 package with through-hole mounting. PCB layouts and thermal management designs remain unchanged.

Q: Why is the STTH4R02D classified as obsolete?

A: The STTH4R02D is listed as obsolete by the manufacturer. The STTH802D, with active product status, represents the current generation equivalent and ensures long-term availability for procurement and design support.

Q: Does the STTH802D meet the same compliance standards?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.

Q: Is there a performance difference in reverse recovery characteristics?

A: No. Both devices feature identical reverse recovery time (30 ns) and fast recovery classification (≤ 500 ns), ensuring equivalent switching performance in rectification circuits.