SDT04S60 Silicon Carbide Schottky Diode - Equivalent & Substitute Parts

Part Overview

The SDT04S60 is a 600V, 4A silicon carbide Schottky diode manufactured by Infineon Technologies in the CoolSiC™+ series. This through-hole component is packaged in TO-220-2 configuration and is designed for high-efficiency rectification applications requiring fast switching characteristics inherent to SiC technology.

The SDT04S60 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this component specification.

Substiute Parts

SDT04S60

Infineon TechnologiesIn Stock: 8484SDT04S60 Datasheet

Current PartRFQ

STPSC406D

STMicroelectronicsIn Stock: 1469STPSC406D Datasheet

MFR RecommendedRFQ

IDH04S60CAKSA1

Infineon TechnologiesIn Stock: 1222IDH04S60CAKSA1 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SDT04S60 are identified based on strict electrical and mechanical parameter alignment within the silicon carbide Schottky diode category. The substitution criteria are:

Primary Matching Parameters:

• Voltage rating: 600V DC reverse voltage
• Current rating: 4A average rectified current
• Forward voltage: 1.9V maximum at 4A
• Technology: SiC Schottky (zero reverse recovery time)
• Mounting: Through-hole configuration
• Package: TO-220-2 or compatible TO-220 variant

Substitution Categories:

MFR Recommended Substitute: Parts explicitly identified by the manufacturer as direct replacements, maintaining full electrical and thermal specifications.

Parametric Equivalent: Parts meeting all critical electrical parameters (voltage, current, forward voltage, reverse recovery characteristics) with compatible packaging, though potentially from different manufacturers or series designations.

Substitutes are grouped by their ability to fulfill the same circuit function without modification to board layout or thermal management design, provided the package footprint remains compatible with TO-220-2 mounting.

Parameter Comparison

Engineering Selection Recommendations

STPSC406D (STMicroelectronics) is designated as the manufacturer-recommended substitute. This part maintains identical electrical specifications for voltage, current, and forward voltage characteristics. The STPSC406D demonstrates improved reverse leakage performance (50 µA versus 200 µA) and is ROHS3 compliant. The operating temperature range is -40°C to 175°C, which is narrower at the lower bound compared to the SDT04S60 (-55°C to 175°C). This difference is significant only for applications requiring operation below -40°C. Both parts share TO-220-2 packaging and zero reverse recovery time characteristic of SiC Schottky technology.

IDH04S60CAKSA1 (Infineon Technologies) is a parametric equivalent within the same manufacturer ecosystem. This part maintains the full -55°C to 175°C operating temperature range and identical electrical specifications. The IDH04S60CAKSA1 is ROHS3 compliant and offers comparable reverse leakage performance (50 µA). Capacitance specification differs slightly (130 pF at 1V versus 150 pF at 0V), which is within acceptable tolerance for most rectification applications. This part is discontinued at DiGi Electronics but remains available through alternative distribution channels.

Selection Criteria:

• For applications requiring operation below -40°C: IDH04S60CAKSA1
• For ROHS3 compliance requirement: Both STPSC406D and IDH04S60CAKSA1
• For improved reverse leakage performance: Both substitute parts (50 µA versus 200 µA)
• For cross-manufacturer diversification: STPSC406D (STMicroelectronics)
• For same-manufacturer continuity: IDH04S60CAKSA1 (Infineon Technologies)

Frequently Asked Questions (FAQ)

Q: Can STPSC406D be used as a direct replacement for SDT04S60 in all applications?

A: STPSC406D is electrically equivalent for voltage, current, and forward voltage specifications. The primary consideration is the operating temperature range. STPSC406D operates from -40°C to 175°C, while SDT04S60 operates from -55°C to 175°C. If your application requires junction temperatures below -40°C, STPSC406D is not suitable. For applications within -40°C to 175°C, STPSC406D is a direct replacement with identical TO-220-2 packaging.

Q: What is the significance of the reverse leakage current difference between SDT04S60 (200 µA) and the substitute parts (50 µA)?

A: Lower reverse leakage current indicates reduced parasitic current flow when the diode is reverse-biased. The substitute parts (STPSC406D and IDH04S60CAKSA1) demonstrate superior leakage performance. This difference is beneficial for applications sensitive to standby power consumption or requiring high impedance in reverse bias conditions. For standard rectification applications, this difference does not affect functional compatibility.

Q: Are the capacitance differences between these parts significant?

A: The capacitance specifications vary slightly: SDT04S60 (150 pF @ 0V), STPSC406D (200 pF @ 0V), and IDH04S60CAKSA1 (130 pF @ 1V). These differences are minor and do not affect rectification performance in typical power supply applications. Capacitance becomes relevant in high-frequency switching circuits or applications with stringent EMI requirements. For standard 50/60 Hz rectification, these variations are negligible.

Q: What does "zero reverse recovery time" mean for these SiC Schottky diodes?

A: Reverse recovery time (trr) is the interval required for a diode to transition from forward conduction to reverse blocking when the applied voltage reverses. SiC Schottky diodes inherently exhibit zero reverse recovery time because they lack the minority carrier storage characteristic of silicon junction diodes. This property enables faster switching, reduced switching losses, and improved efficiency in power conversion applications. All three parts (SDT04S60, STPSC406D, IDH04S60CAKSA1) share this advantage.

Q: Is the TO-220-2 package compatible across all three parts?

A: Yes. All three parts use TO-220-2 packaging for through-hole mounting. The physical footprint, lead spacing, and thermal characteristics are identical. No PCB layout modifications are required when substituting between these parts. The supplier device package designation may differ (PG-TO220-2-2 for Infineon parts, TO-220AC for STMicroelectronics), but the mechanical interface remains compatible.

Q: Why is SDT04S60 classified as obsolete?

A: Product obsolescence indicates that the manufacturer has discontinued production and removed the part from active distribution. Obsolete status does not reflect product performance or reliability; rather, it reflects manufacturing lifecycle decisions. The substitute parts (STPSC406D and IDH04S60CAKSA1) are also obsolete or discontinued, indicating this product generation has been superseded by newer designs. Inventory availability varies by distributor.

Q: Which substitute part should I select for new designs?

A: For new designs, consult current manufacturer datasheets and availability through authorized distributors. Both STPSC406D and IDH04S60CAKSA1 are obsolete or discontinued. Infineon Technologies and STMicroelectronics offer current-generation SiC Schottky diodes with similar specifications. The selection between these obsolete substitutes should be based on immediate availability requirements and application temperature range constraints, not for long-term production planning.