STDLED625H N-Channel 620V 4.5A MOSFET DPAK Equivalent & Substitute Parts

Part Overview

The STDLED625H is an N-Channel metal oxide semiconductor field-effect transistor (MOSFET) manufactured by STMicroelectronics, rated for 620V drain-to-source voltage and 4.5A continuous drain current in a surface mount DPAK package. This device is classified as obsolete product status. Identification of equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this component.

Substiute Parts

STDLED625H

STMicroelectronicsIn Stock: 3445STDLED625H Datasheet

Current PartRFQ

STD6N62K3

STMicroelectronicsIn Stock: 3675STD6N62K3 Datasheet

SimilarRFQ

FDD5N60NZTM

onsemiIn Stock: 84309FDD5N60NZTM Datasheet

SimilarRFQ

FQD5N60CTM

onsemiIn Stock: 20453FQD5N60CTM Datasheet

SimilarRFQ

IXTY2N65X2

IXYSIn Stock: 842IXTY2N65X2 Datasheet

SimilarRFQ

TK4P60DA(T6RSS-Q)

Toshiba Semiconductor and StorageIn Stock: 1204TK4P60DA(T6RSS-Q) Datasheet

SimilarRFQ

TK4P60DB(T6RSS-Q)

Toshiba Semiconductor and StorageIn Stock: 1098TK4P60DB(T6RSS-Q) Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the STDLED625H is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Drain to Source Voltage (Vdss) must equal or exceed 620V
• Continuous Drain Current (Id) must equal or exceed 4.5A at 25°C
• Gate-Source Voltage (Vgs) maximum rating must accommodate ±30V operation
• On-state resistance (Rds On) must not exceed application thermal and efficiency requirements
• Gate Charge (Qg) must be compatible with driver circuit specifications
• Power Dissipation (Max) must support thermal management design

Mechanical Compatibility Criteria:

• Package must be TO-252-3 DPAK (2 Leads + Tab) SC-63 surface mount configuration
• Mounting type must be surface mount
• Lead configuration and footprint must match PCB design

Compliance Criteria:

• RoHS3 compliance required
• Moisture Sensitivity Level (MSL) 1 (Unlimited)
• REACH Unaffected status

Substitute parts listed below meet these criteria with electrical parameters equal to or exceeding the STDLED625H specification, ensuring functional equivalence or performance improvement in the same application circuit.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: STD6N62K3

The STD6N62K3 manufactured by STMicroelectronics is the primary substitute for the STDLED625H. This device maintains identical voltage rating (620V Vdss), exceeds current rating (5.5A versus 4.5A), and provides improved on-state resistance (1.28 Ohm versus 2 Ohm). The STD6N62K3 is active product status with ROHS3 compliance and unlimited moisture sensitivity rating. The SuperMESH3™ technology series provides enhanced performance characteristics suitable for direct replacement in existing circuit designs.

Secondary Substitutes: FDD5N60NZTM and TK4P60DB(T6RSS-Q)

The FDD5N60NZTM (onsemi UniFET-II™) and TK4P60DB(T6RSS-Q) (Toshiba π-MOSVII) provide functional equivalence with reduced voltage rating (600V Vdss). These devices are suitable for applications where 600V operation is acceptable. The FDD5N60NZTM offers extended operating temperature range (-55°C to 150°C) and active product status. The TK4P60DB(T6RSS-Q) provides matched on-state resistance (2 Ohm) and current rating (3.7A) with active product status.

Alternative Substitutes: FQD5N60CTM and IXTY2N65X2

The FQD5N60CTM (onsemi QFET®) and IXTY2N65X2 (IXYS Ultra X2) provide alternative solutions for lower current applications. The FQD5N60CTM is rated for 2.8A continuous drain current and includes extended operating temperature range. The IXTY2N65X2 provides highest voltage rating (650V Vdss) with lowest gate charge (4.3 nC) for applications requiring minimal driver circuit loading.

All substitute parts maintain TO-252-3 DPAK surface mount package compatibility, ROHS3 or RoHS compliance, and MSL 1 (Unlimited) moisture sensitivity rating. Selection among substitutes depends on specific application requirements for voltage margin, current capacity, thermal dissipation, and gate drive characteristics.

Frequently Asked Questions (FAQ)

Q: Can the STD6N62K3 directly replace the STDLED625H in existing designs?

A: Yes. The STD6N62K3 maintains identical 620V Vdss rating, exceeds the 4.5A current requirement, and uses the same TO-252-3 DPAK package. No PCB modifications are required. The improved on-state resistance (1.28 Ohm) reduces power dissipation compared to the original device.

Q: What is the voltage rating difference between the STDLED625H and FDD5N60NZTM?

A: The STDLED625H is rated for 620V Vdss while the FDD5N60NZTM is rated for 600V Vdss. The 20V difference represents a 3.2% reduction in voltage margin. Applications operating below 600V can use the FDD5N60NZTM without circuit modification.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts are either ROHS3 Compliant or RoHS Compliant. The STDLED625H, STD6N62K3, FDD5N60NZTM, FQD5N60CTM, and IXTY2N65X2 are ROHS3 Compliant. The Toshiba devices TK4P60DA(T6RSS-Q) and TK4P60DB(T6RSS-Q) are RoHS Compliant.

Q: Which substitute has the lowest gate charge?

A: The IXTY2N65X2 has the lowest gate charge at 4.3 nC @ 10V, compared to 23 nC for the STDLED625H. Lower gate charge reduces driver circuit power consumption and switching losses in high-frequency applications.

Q: Can I use FQD5N60CTM if my application requires 4.5A continuous current?

A: No. The FQD5N60CTM is rated for 2.8A continuous drain current, which is below the 4.5A requirement. This device is suitable only for applications requiring 2.8A or less.

Q: What is the package compatibility across all substitute parts?

A: All substitute parts use the TO-252-3 DPAK (2 Leads + Tab) SC-63 surface mount package. PCB footprints and lead spacing are identical, allowing direct physical replacement without layout modifications.

Q: Which substitute provides the best thermal performance?

A: The STD6N62K3 provides the highest power dissipation rating at 90W (Tc), followed by FDD5N60NZTM at 83W (Tc) and TK4P60DB(T6RSS-Q) at 80W (Tc). Selection depends on application thermal management requirements and ambient operating conditions.

Q: Are there operating temperature differences between substitutes?

A: Yes. The FDD5N60NZTM, FQD5N60CTM, and IXTY2N65X2 support extended operating temperature range from -55°C to 150°C. The STDLED625H, STD6N62K3, TK4P60DA(T6RSS-Q), and TK4P60DB(T6RSS-Q) are rated to 150°C maximum junction temperature. Applications requiring sub-zero operation must use devices with -55°C minimum rating.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity?

A: MSL 1 (Unlimited) indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. All listed parts carry this rating, eliminating moisture-related reliability concerns.

Q: Which substitute is recommended for new designs?

A: The STD6N62K3 is recommended for new designs. It is active product status, provides performance improvement over the obsolete STDLED625H, maintains identical voltage rating, and is available from STMicroelectronics with established supply chain support.