STPSC806D Silicon Carbide Schottky Diode Equivalent & Substitute Parts

Part Overview

The STPSC806D is a 600V, 8A silicon carbide Schottky rectifier diode manufactured by STMicroelectronics in a through-hole TO-220AC package. This device is classified as Active product status with 1400 units currently in stock. The STPSC806D utilizes SiC technology to deliver zero reverse recovery time and low forward voltage characteristics suitable for high-frequency switching applications.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when design requirements demand higher current ratings or voltage margins, or when alternative manufacturers' components meet or exceed the electrical specifications of the original design.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Maximum	600	V
Current - Average Rectified (Io)	8	A
Voltage - Forward (Vf) Maximum @ If	1.7 @ 8	V @ A
Reverse Recovery Time (trr)	0	ns
Current - Reverse Leakage @ Vr	100	µA @ 600V
Capacitance @ Vr, F	450	pF @ 0V, 1MHz
Mounting Type	Through Hole
Package / Case	TO-220-2
Operating Temperature - Junction	-40 to 175	°C
Technology	SiC (Silicon Carbide) Schottky
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the STPSC806D is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Technology: SiC (Silicon Carbide) Schottky
Mounting Type: Through Hole
Package / Case: TO-220-2 or compatible TO-220 variant
Reverse Recovery Time: 0 ns (no recovery time > 500mA)
Voltage - DC Reverse (Vr): Equal to or greater than 600V
Current - Average Rectified (Io): Equal to or greater than 8A
RoHS Status: ROHS3 Compliant

Acceptable Substitution Logic: Parts with higher voltage ratings (650V) and higher current ratings (13.5A or greater) are acceptable substitutes because they operate within the same technology platform and maintain backward compatibility with the original design envelope. Parts with lower current ratings or voltage ratings are not suitable substitutes. Forward voltage characteristics and reverse leakage current must remain within acceptable operating margins for the application.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) V	Io (A)	Vf (Max) @ If (V @ A)	Reverse Leakage @ Vr (µA)	Package	Status
STPSC806D	STMicroelectronics	600	8	1.7 @ 8	100 @ 600V	TO-220-2	Active
C3D04065A	Wolfspeed, Inc.	650	13.5	1.8 @ 4	60 @ 650V	TO-220-2	Active
C3D06060F	Wolfspeed, Inc.	600	7.5	1.8 @ 6	50 @ 600V	TO-220-2	Active
C3D06065A	Wolfspeed, Inc.	650	19	1.8 @ 6	60 @ 650V	TO-220-2	Active
C3D08065A	Wolfspeed, Inc.	650	24	1.8 @ 8	60 @ 650V	TO-220-2	Active
C3D10065A	Wolfspeed, Inc.	650	30	1.8 @ 10	60 @ 650V	TO-220-2	Active
IDH04S60CAKSA1	Infineon Technologies	600	4	1.9 @ 4	50 @ 600V	TO-220-2	Discontinued
IDH05SG60CXKSA1	Infineon Technologies	600	5	2.3 @ 5	30 @ 600V	TO-220-2	Discontinued
IDH06S60CAKSA1	Infineon Technologies	600	6	1.7 @ 6	80 @ 600V	TO-220-2	Discontinued
IDH10S60CAKSA1	Infineon Technologies	600	10	1.7 @ 10	140 @ 600V	TO-220-2	Discontinued

Engineering Selection Recommendations

Primary Substitute Candidates (Active Status):

The Wolfspeed Z-Rec® series diodes (C3D04065A, C3D06060F, C3D06065A, C3D08065A, C3D10065A) are all Active products with ROHS3 compliance and represent the most suitable substitutes for the STPSC806D. These parts maintain SiC Schottky technology, through-hole mounting, and TO-220-2 packaging. The C3D06065A, C3D08065A, and C3D10065A offer higher current ratings (19A, 24A, and 30A respectively) with 650V voltage ratings, providing design margin for applications requiring higher performance. The C3D06060F maintains the 600V rating with 7.5A current capacity, offering a closer electrical match to the original specification.

Secondary Substitute Candidates (Discontinued Status):

The Infineon CoolSiC™+ series diodes (IDH04S60CAKSA1, IDH05SG60CXKSA1, IDH06S60CAKSA1, IDH10S60CAKSA1) are classified as Discontinued at DiGi Electronics. These parts maintain 600V voltage ratings and SiC Schottky technology with TO-220-2 packaging. However, their discontinued status limits long-term availability. The IDH10S60CAKSA1 provides a 10A current rating that exceeds the STPSC806D specification. These parts are suitable only for applications where existing inventory is available and future restocking is not required.

Compliance Verification:

All substitute parts listed maintain ROHS3 compliance and REACH Unaffected status, matching the environmental and regulatory requirements of the STPSC806D. All parts operate within the -55°C to 175°C junction temperature range or the -40°C to 175°C range of the original part, ensuring thermal compatibility.

Frequently Asked Questions (FAQ)

Q: Can the C3D06060F substitute for the STPSC806D despite having a lower current rating of 7.5A versus 8A?

A: No. The C3D06060F with 7.5A maximum average rectified current is below the 8A requirement of the STPSC806D. Substitutes must meet or exceed the original specification. This part is not suitable for direct replacement.

Q: Are the Wolfspeed C3D series parts with 650V ratings suitable for a 600V application?

A: Yes. The C3D04065A, C3D06065A, C3D08065A, and C3D10065A all feature 650V maximum reverse voltage ratings, which exceed the 600V requirement of the STPSC806D. Higher voltage ratings provide design margin and are acceptable for applications designed for 600V operation.

Q: What is the significance of the TO-220-2 versus TO-220-F2 package designation?

A: The TO-220-2 and TO-220-F2 designations refer to different mechanical packaging formats within the TO-220 family. The C3D06060F uses the TO-220-F2 (Full Pack) variant. While both are through-hole packages, the mechanical dimensions and lead configurations may differ. Verify PCB footprint compatibility before substitution.

Q: Why are the Infineon IDH series parts listed as discontinued?

A: The Infineon CoolSiC™+ series diodes (IDH04S60CAKSA1, IDH05SG60CXKSA1, IDH06S60CAKSA1, IDH10S60CAKSA1) are marked as Discontinued at DiGi Electronics, indicating they are no longer actively distributed through this supplier channel. While these parts maintain full SiC Schottky technology and TO-220-2 compatibility, their discontinued status restricts availability for new designs and future procurement.

Q: Can I use the C3D10065A with its 30A rating in place of the STPSC806D in an 8A application?

A: Yes. The C3D10065A with 30A maximum average rectified current and 650V voltage rating exceeds the STPSC806D specifications. Higher current-rated diodes are acceptable substitutes for lower current applications, as they operate within their safe operating area. The 650V rating provides additional voltage margin.

Q: What are the key electrical differences between the STPSC806D and the Wolfspeed C3D series substitutes?

A: The primary differences are voltage rating (600V versus 650V) and current capacity (8A versus 13.5A to 30A depending on the C3D model). Forward voltage characteristics are comparable (1.7V to 1.8V range). Reverse leakage current in the Wolfspeed parts is generally lower (60µA versus 100µA at rated voltage). All maintain zero reverse recovery time characteristic of SiC Schottky technology.

Q: Are there any thermal considerations when substituting higher-rated diodes?

A: Thermal performance depends on application-specific factors including junction temperature, thermal resistance of the package, and heat dissipation design. The provided operating temperature ranges (-40°C to 175°C for STPSC806D and -55°C to 175°C for most substitutes) define the maximum allowable junction temperatures. Verify that thermal design accommodates the substitute part's power dissipation characteristics in your specific application.

Q: What does the zero reverse recovery time (trr = 0 ns) specification mean for substitution?

A: All listed substitute parts maintain the zero reverse recovery time characteristic, indicating they are SiC Schottky diodes without minority carrier storage effects. This is a critical parameter for high-frequency switching applications. Any substitute must maintain this specification to preserve application performance.

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