STTH50W06SW Equivalent & Substitute Parts

Part Overview

The STTH50W06SW is a general-purpose rectifier diode manufactured by STMicroelectronics, rated for 600 V DC reverse voltage and 50 A average rectified current in a TO-247-3 through-hole package. This component is classified as obsolete, indicating that direct procurement from the original manufacturer may be limited or unavailable. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for applications utilizing this rectifier specification.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	50	A
Voltage - Forward (Vf) (Max) @ If	2.4 V @ 50 A	V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	45	ns
Current - Reverse Leakage @ Vr	50	µA @ 600 V
Mounting Type	Through Hole	—
Package / Case	TO-247-3	—
Operating Temperature - Junction (Max)	175	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the STTH50W06SW is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 600 V
Mounting Type: Must be Through Hole
Package / Case: Must be TO-247-3 or compatible TO-247 variant
Technology: Must be Standard rectifier diode technology
Speed Classification: Must be Fast Recovery (≤ 500ns, > 200mA)

Secondary Compatibility Factors:

Current - Average Rectified (Io): Substitute parts may have equal or higher current ratings
Voltage - Forward (Vf): Lower forward voltage indicates improved efficiency; higher values remain acceptable within thermal design limits
Reverse Recovery Time (trr): Lower values indicate faster switching characteristics
Current - Reverse Leakage: Lower leakage current indicates superior reverse blocking performance
Operating Temperature Range: Must support the application's thermal requirements
RoHS and REACH Compliance: Must maintain regulatory compliance status

Substitute parts are grouped based on current rating capacity and thermal performance characteristics while maintaining the 600 V voltage specification and TO-247 package family compatibility.

Parameter Comparison

Parameter	STTH50W06SW (Main)	DHF30IM600QB	FFH60UP60S3	IDW30E60FKSA1	VS-60APF06-M3	VS-C4PU3006LHN3	VS-C4PU6006LHN3
Manufacturer	STMicroelectronics	IXYS	onsemi	Infineon Technologies	Vishay	Vishay	Vishay
Voltage - DC Reverse (Vr) (Max)	600 V	600 V	600 V	600 V	600 V	600 V	600 V
Current - Average Rectified (Io)	50 A	30 A	60 A	60 A	60 A	15 A	30 A
Voltage - Forward (Vf) (Max) @ If	2.4 V @ 50 A	2.36 V @ 30 A	1.7 V @ 60 A	2.0 V @ 30 A	1.3 V @ 60 A	1.55 V @ 15 A	1.6 V @ 30 A
Speed	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Reverse Recovery Time (trr)	45 ns	35 ns	80 ns	143 ns	180 ns	60 ns	65 ns
Current - Reverse Leakage @ Vr	50 µA @ 600 V	50 µA @ 600 V	100 µA @ 600 V	40 µA @ 600 V	100 µA @ 600 V	15 µA @ 600 V	50 µA @ 600 V
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-247-3	TO-3P-3, SC-65-3	TO-247-3	TO-247-3	TO-247-3	TO-247-3	TO-247-3
Operating Temperature - Junction (Max)	175°C	150°C	150°C	175°C	150°C	175°C	175°C
Product Status	Obsolete	Active	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Current Rating Replacement (50 A Equivalent):

The STTH50W06SW operates at 50 A average rectified current. No substitute part in the provided list maintains this exact current rating. Selection of a substitute requires evaluation of application current requirements:

FFH60UP60S3 (onsemi, 60 A): Provides 20% current margin above the original specification. Active product status ensures ongoing availability. TO-247-3 package compatibility is confirmed. Forward voltage of 1.7 V @ 60 A indicates superior efficiency compared to the original 2.4 V @ 50 A specification. Reverse recovery time of 80 ns is acceptable for fast recovery applications. Reverse leakage current of 100 µA is elevated but within acceptable limits for general-purpose rectification.
IDW30E60FKSA1 (Infineon Technologies, 60 A): Active product status with confirmed long-term availability. TO-247-3 package compatibility is established. Operating temperature range extends to 175°C, matching the original specification. Forward voltage of 2.0 V @ 30 A provides improved efficiency. Reverse recovery time of 143 ns is longer than the original 45 ns, which may impact switching performance in high-frequency applications.
VS-60APF06-M3 (Vishay, 60 A): Active product status with established supply chain. TO-247-3 package compatibility confirmed. Forward voltage of 1.3 V @ 60 A represents the lowest forward drop among all substitutes, indicating optimal efficiency. Reverse recovery time of 180 ns is the longest among candidates, requiring thermal design consideration in switching applications. Reverse leakage current of 100 µA matches FFH60UP60S3.

For Lower Current Applications:

VS-C4PU6006LHN3 (Vishay, 30 A): Active product status with automotive-grade qualification (AEC-Q101). Operating temperature range of -55°C to 175°C exceeds the original specification. Forward voltage of 1.6 V @ 30 A provides efficiency improvement. Reverse recovery time of 65 ns is acceptable for fast recovery applications. Reverse leakage current of 50 µA matches the original specification exactly.
VS-C4PU3006LHN3 (Vishay, 15 A): Active product status with automotive-grade qualification (AEC-Q101). Operating temperature range of -55°C to 175°C exceeds the original specification. Forward voltage of 1.55 V @ 15 A provides efficiency improvement. Reverse recovery time of 60 ns is acceptable for fast recovery applications. Reverse leakage current of 15 µA is superior to the original specification.

For Reduced Current Capacity:

DHF30IM600QB (IXYS, 30 A): Active product status ensures supply availability. Package compatibility requires verification; TO-3P-3 and SC-65-3 packages differ from TO-247-3. Forward voltage of 2.36 V @ 30 A is comparable to the original specification. Reverse recovery time of 35 ns is superior to the original 45 ns. Operating temperature maximum of 150°C is 25°C below the original specification.

Compliance and Regulatory Status:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the original part's regulatory standing. No additional compliance barriers exist for substitution.

Frequently Asked Questions (FAQ)

Q: Can the STTH50W06SW be replaced with a lower current-rated diode?

A: Substitution with lower current-rated parts is not recommended for direct replacement in applications requiring 50 A operation. The STTH50W06SW is rated for 50 A average rectified current. Substitutes with lower ratings (DHF30IM600QB at 30 A, VS-C4PU3006LHN3 at 15 A, VS-C4PU6006LHN3 at 30 A) are suitable only for applications with reduced current requirements. Exceeding the rated current of a substitute part results in excessive junction temperature rise and accelerated device failure.

Q: What is the significance of the TO-247-3 package specification?

A: The TO-247-3 package is a through-hole power package with three leads (anode, cathode, and case). This package provides mechanical mounting compatibility with PCB layouts designed for the STTH50W06SW. The DHF30IM600QB uses TO-3P-3 and SC-65-3 packages, which have different lead configurations and mounting footprints. Physical verification of PCB compatibility is required before substituting with DHF30IM600QB. All other substitute parts use TO-247-3 or compatible TO-247 variants and mount directly without layout modification.

Q: How does forward voltage affect circuit performance?

A: Forward voltage (Vf) represents the voltage drop across the diode during forward conduction. The STTH50W06SW specifies 2.4 V @ 50 A. Substitute parts with lower forward voltage (FFH60UP60S3 at 1.7 V, VS-60APF06-M3 at 1.3 V, VS-C4PU6006LHN3 at 1.6 V) reduce power dissipation and heat generation. Lower forward voltage improves overall circuit efficiency and reduces thermal management requirements. Substitutes with comparable or slightly higher forward voltage (IDW30E60FKSA1 at 2.0 V @ 30 A, DHF30IM600QB at 2.36 V @ 30 A) maintain similar thermal characteristics to the original part.

Q: What is reverse recovery time and why does it matter?

A: Reverse recovery time (trr) is the interval required for a forward-conducting diode to block reverse voltage after the applied voltage reverses polarity. The STTH50W06SW specifies 45 ns. Shorter reverse recovery times (DHF30IM600QB at 35 ns) reduce switching losses and enable higher switching frequencies. Longer reverse recovery times (FFH60UP60S3 at 80 ns, IDW30E60FKSA1 at 143 ns, VS-60APF06-M3 at 180 ns) increase switching losses and heat generation in high-frequency applications. For low-frequency rectification (50/60 Hz line frequency), reverse recovery time has minimal impact on performance.

Q: Are all substitute parts currently available?

A: Product status varies among substitutes. Active products (DHF30IM600QB, IDW30E60FKSA1, VS-60APF06-M3, VS-C4PU3006LHN3, VS-C4PU6006LHN3) have confirmed ongoing manufacturing and supply chain availability. FFH60UP60S3 is classified as obsolete, indicating limited availability similar to the original STTH50W06SW. For long-term supply assurance, selection of active-status parts is recommended.

Q: Does operating temperature range affect substitution suitability?

A: The STTH50W06SW specifies a maximum junction temperature of 175°C. Substitute parts with matching or higher maximum junction temperatures (IDW30E60FKSA1 at 175°C, VS-C4PU3006LHN3 at 175°C, VS-C4PU6006LHN3 at 175°C) are fully compatible with thermal designs based on the original specification. Substitutes with lower maximum junction temperatures (DHF30IM600QB at 150°C, FFH60UP60S3 at 150°C, VS-60APF06-M3 at 150°C) require verification that circuit thermal conditions do not exceed 150°C. If the original design operates near 175°C, these lower-rated substitutes may require additional thermal management or circuit redesign.

Q: What does RoHS3 compliance mean for substitution?

A: RoHS3 (Restriction of Hazardous Substances Directive 3) compliance indicates that the component meets European Union restrictions on hazardous materials, specifically lead, cadmium, mercury, and other regulated substances. All substitute parts maintain ROHS3 compliance status, matching the original STTH50W06SW. This ensures regulatory compatibility for applications subject to RoHS requirements and eliminates compliance barriers to substitution.

Q: Can the STTH50W06SW be replaced with a higher current-rated diode?

A: Yes. Substitute parts with higher current ratings (FFH60UP60S3 at 60 A, IDW30E60FKSA1 at 60 A, VS-60APF06-M3 at 60 A) are suitable for direct replacement in applications requiring 50 A or less. Higher current ratings provide design margin and thermal headroom. The diode operates at a lower percentage of its rated capacity, reducing junction temperature and extending component life. No circuit modification is required; the higher-rated diode functions identically to the original part at the same operating current.

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