STTH8S06B-TR Equivalent & Substitute Parts

Part Overview

The STTH8S06B-TR is a 600 V, 8 A ultrafast boost diode manufactured by STMicroelectronics, designed for surface mount applications in the TO-252-3 DPAK package. This rectifier diode operates with a maximum junction temperature of 175°C and is classified as an active product with ROHS3 compliance. Substitute parts are identified when equivalent electrical ratings, mechanical compatibility, and packaging specifications align with the original component, enabling direct replacement in circuit designs without functional degradation.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	8	A
Voltage - Forward (Vf) (Max) @ If	3.4 @ 8 A	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	18	ns
Current - Reverse Leakage @ Vr	20	µA @ 600 V
Mounting Type	Surface Mount	—
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63	—
Operating Temperature - Junction (Max)	175	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the STTH8S06B-TR are identified based on strict equivalence across the following critical parameters:

Voltage Rating: DC reverse voltage of 600 V maximum
Current Rating: Average rectified current of 8 A
Speed Classification: Fast recovery diode with recovery time ≤ 500 ns at currents > 200 mA
Package Type: TO-252-3 DPAK surface mount configuration with identical lead and tab geometry
Mounting Technology: Surface mount compatibility
Compliance: ROHS3 compliance and MSL Level 1 rating

The VS-8EWL06FNTR-M3 from Vishay General Semiconductor meets all substitution criteria through matching voltage, current, speed classification, and package specifications. Differences in forward voltage drop and reverse recovery time do not preclude substitution, as these parameters remain within acceptable operating ranges for the diode category and do not violate the electrical constraints of typical boost converter applications.

Parameter Comparison

Parameter	STTH8S06B-TR (STMicroelectronics)	VS-8EWL06FNTR-M3 (Vishay)	Match Status
Voltage - DC Reverse (Vr) (Max)	600 V	600 V	Equivalent
Current - Average Rectified (Io)	8 A	8 A	Equivalent
Voltage - Forward (Vf) (Max) @ If	3.4 V @ 8 A	1.05 V @ 8 A	Compatible (Vishay lower)
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Equivalent
Reverse Recovery Time (trr)	18 ns	170 ns	Compatible (both within fast recovery range)
Current - Reverse Leakage @ Vr	20 µA @ 600 V	5 µA @ 600 V	Compatible (Vishay lower)
Mounting Type	Surface Mount	Surface Mount	Equivalent
Package / Case	TO-252-3, DPAK (2 Leads + Tab), SC-63	TO-252-3, DPAK (2 Leads + Tab), SC-63	Equivalent
Operating Temperature - Junction (Max)	175°C	175°C	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Equivalent

Engineering Selection Recommendations

The VS-8EWL06FNTR-M3 qualifies as a direct substitute for the STTH8S06B-TR based on electrical and mechanical parameter equivalence. Both components are active products with ROHS3 compliance and MSL Level 1 ratings, ensuring regulatory and environmental compatibility. The Vishay part exhibits superior performance characteristics in forward voltage drop (1.05 V versus 3.4 V) and reverse leakage current (5 µA versus 20 µA), which result in reduced power dissipation and improved circuit efficiency. Both diodes maintain fast recovery operation within the ≤ 500 ns specification and are housed in identical TO-252-3 DPAK packages, enabling seamless PCB layout compatibility without design modification. Selection between these parts depends on component availability, supply chain considerations, and cost factors rather than functional or electrical constraints.

Frequently Asked Questions (FAQ)

Q: Can the VS-8EWL06FNTR-M3 be used as a direct replacement for the STTH8S06B-TR without PCB modifications?

A: Yes. Both diodes use the TO-252-3 DPAK package with identical lead configuration and tab geometry. No PCB layout changes are required for substitution.

Q: What is the significance of the difference in forward voltage drop between these parts?

A: The STTH8S06B-TR specifies 3.4 V forward voltage at 8 A, while the VS-8EWL06FNTR-M3 specifies 1.05 V at the same current. The Vishay part exhibits lower forward voltage, resulting in reduced power dissipation and improved thermal performance in the application circuit. Both values are within acceptable ranges for boost diode operation.

Q: Are there differences in reverse recovery time between these diodes?

A: Yes. The STTH8S06B-TR has a reverse recovery time of 18 ns, while the VS-8EWL06FNTR-M3 has 170 ns. Both values satisfy the fast recovery classification (≤ 500 ns). The shorter recovery time of the STMicroelectronics part may provide marginal benefits in high-frequency switching applications, but both parts are functionally compatible in standard boost converter designs.

Q: Do both parts meet the same regulatory and compliance standards?

A: Yes. Both the STTH8S06B-TR and VS-8EWL06FNTR-M3 are ROHS3 compliant with MSL Level 1 ratings. They meet identical environmental and regulatory requirements for industrial and commercial applications.

Q: What is the maximum junction temperature rating for each part?

A: Both diodes are rated for a maximum junction temperature of 175°C, ensuring equivalent thermal performance limits in the application circuit.

Q: Are these parts available in the same packaging format?

A: Yes. Both components are supplied in TO-252-3 DPAK surface mount packages. The STTH8S06B-TR is available in Tape & Reel format, and the VS-8EWL06FNTR-M3 is also available in Tape & Reel format, supporting automated assembly processes.

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