STDLED656 N-Channel MOSFET 650V 6A DPAK Equivalent & Substitute Parts

Part Overview

The STDLED656 is an N-Channel MOSFET manufactured by STMicroelectronics, rated for 650V drain-to-source voltage with 6A continuous drain current in a surface mount DPAK package. This device is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design support and procurement requirements. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating the same or compatible package footprints.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	650	V
Continuous Drain Current (Id) @ 25°C	6	A
Drive Voltage (Max Rds On)	10	V
Rds On (Max) @ Id, Vgs	1.3	Ohm @ 2.7A, 10V
Gate Threshold Voltage Vgs(th) (Max) @ Id	4.5	V @ 50µA
Gate Charge (Qg) (Max) @ Vgs	34	nC @ 10V
Maximum Gate Voltage Vgs (Max)	±30	V
Input Capacitance (Ciss) (Max) @ Vds	895	pF @ 100V
Power Dissipation (Max)	70	W
Operating Temperature (TJ)	150	°C
Package Type	TO-252-3 DPAK	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the STDLED656 is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Drain-to-Source Voltage (Vdss): Must equal or exceed 650V
Package Type: Must be TO-252-3 DPAK or mechanically compatible surface mount package
FET Type: N-Channel MOSFET technology
Mounting: Surface mount configuration
RoHS Compliance: ROHS3 Compliant status required

Performance Matching Criteria:

Continuous Drain Current (Id): Substitute must support minimum 6A at 25°C
On-State Resistance (Rds On): Lower or equivalent values at specified gate voltage
Gate Charge (Qg): Lower values preferred for reduced switching losses
Power Dissipation: Minimum 70W thermal capability
Operating Temperature: Support for 150°C junction temperature

Electrical Compatibility Criteria:

Gate Threshold Voltage (Vgs(th)): Within ±30V maximum gate voltage specification
Input Capacitance (Ciss): Affects gate drive circuit design but does not prevent substitution

The identified substitute parts AOD7N65 and IPD65R1K4C6ATMA1 meet the mandatory criteria of 650V Vdss rating, N-Channel MOSFET technology, TO-252-3 DPAK package compatibility, and ROHS3 compliance. Both parts accommodate the electrical specifications of the STDLED656 within their respective current and thermal ratings.

Parameter Comparison

Parameter	STDLED656 (STMicroelectronics)	AOD7N65 (Alpha & Omega)	IPD65R1K4C6ATMA1 (Infineon)	Unit
Drain to Source Voltage (Vdss)	650	650	650	V
Continuous Drain Current (Id) @ 25°C	6	7	3.2	A
Drive Voltage (Max Rds On)	10	10	10	V
Rds On (Max) @ Id, Vgs	1.3 @ 2.7A, 10V	1.56 @ 3.5A, 10V	1.4 @ 1A, 10V	Ohm
Gate Threshold Voltage Vgs(th) (Max) @ Id	4.5 @ 50µA	4.5 @ 250µA	3.5 @ 100µA	V
Gate Charge (Qg) (Max) @ Vgs	34 @ 10V	24 @ 10V	10.5 @ 10V	nC
Maximum Gate Voltage Vgs (Max)	±30	±30	±20	V
Input Capacitance (Ciss) (Max) @ Vds	895 @ 100V	1180 @ 25V	225 @ 100V	pF
Power Dissipation (Max)	70	178	28	W
Operating Temperature (TJ)	150	-50 to 150	-55 to 150	°C
Package Type	TO-252-3 DPAK	TO-252-3 DPAK	TO-252-3 DPAK
Product Status	Obsolete	Not For New Designs	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

AOD7N65 (Alpha & Omega Semiconductor Inc.)

The AOD7N65 provides direct package compatibility and exceeds the STDLED656 current rating at 7A continuous drain current. This part demonstrates superior power dissipation capability at 178W, accommodating higher thermal loads. The reduced gate charge of 24 nC compared to 34 nC in the STDLED656 results in lower switching losses. However, the AOD7N65 carries a "Not For New Designs" product status, limiting its suitability for new development initiatives. This part is appropriate for legacy system maintenance and replacement applications where design freeze conditions exist.

IPD65R1K4C6ATMA1 (Infineon Technologies)

The IPD65R1K4C6ATMA1 is classified as an active product, supporting long-term availability and design continuity. This part operates within the CoolMOS™ C6 series, providing advanced switching characteristics with significantly reduced gate charge at 10.5 nC. The lower input capacitance of 225 pF reduces gate drive circuit complexity. However, the continuous drain current rating of 3.2A is below the STDLED656 specification of 6A, and power dissipation is limited to 28W. The maximum gate voltage specification of ±20V is also more restrictive than the STDLED656 ±30V rating. This part is suitable for applications where current requirements do not exceed 3.2A and thermal dissipation remains below 28W.

Selection Criteria:

For applications requiring full electrical equivalence to the STDLED656 across all current and thermal specifications, the AOD7N65 provides the most direct substitution despite its obsolescence status. For new designs prioritizing long-term component availability and advanced switching performance within reduced current and power envelopes, the IPD65R1K4C6ATMA1 is the appropriate selection. Both parts maintain ROHS3 compliance and TO-252-3 DPAK package compatibility.

Frequently Asked Questions (FAQ)

Q: Can the AOD7N65 directly replace the STDLED656 in existing designs?

A: The AOD7N65 is mechanically and electrically compatible with the STDLED656 in the TO-252-3 DPAK package. The AOD7N65 exceeds the STDLED656 specifications in continuous drain current (7A vs. 6A) and power dissipation (178W vs. 70W), making it suitable for direct substitution. Gate charge is lower (24 nC vs. 34 nC), which may improve switching performance. However, verify that the application does not depend on the specific Rds On characteristics at the exact operating point.

Q: Is the IPD65R1K4C6ATMA1 suitable as a drop-in replacement for the STDLED656?

A: The IPD65R1K4C6ATMA1 shares the TO-252-3 DPAK package and 650V Vdss rating with the STDLED656. However, the continuous drain current is limited to 3.2A, which is below the STDLED656 6A specification. This part is not suitable for applications requiring the full 6A current capacity. The IPD65R1K4C6ATMA1 is appropriate only for designs where the actual operating current does not exceed 3.2A.

Q: What is the significance of the "Not For New Designs" status on the AOD7N65?

A: The "Not For New Designs" designation indicates that the AOD7N65 is in the mature or declining phase of its product lifecycle. While the part remains available and functional, manufacturers recommend using active alternatives for new development projects to ensure long-term supply continuity. This status does not affect the electrical performance or reliability of the part for existing applications.

Q: Are all three parts (STDLED656, AOD7N65, IPD65R1K4C6ATMA1) pin-compatible?

A: All three parts use the TO-252-3 DPAK package with identical pin configurations: Gate, Drain, and Source. The physical footprint and pin layout are compatible, allowing PCB-level substitution without layout modifications.

Q: How does gate charge affect device selection?

A: Gate charge (Qg) determines the energy required to switch the MOSFET on and off. Lower gate charge reduces switching losses and simplifies gate drive circuit design. The IPD65R1K4C6ATMA1 has the lowest gate charge at 10.5 nC, followed by the AOD7N65 at 24 nC, and the STDLED656 at 34 nC. For high-frequency switching applications, lower gate charge is advantageous.

Q: What are the thermal considerations when substituting these parts?

A: The STDLED656 is rated for 70W power dissipation. The AOD7N65 supports 178W, providing thermal margin for higher-power applications. The IPD65R1K4C6ATMA1 is limited to 28W, requiring careful thermal management in applications approaching the STDLED656 power rating. Verify that the PCB thermal design and heat sinking accommodate the selected part's power dissipation characteristics.

Q: Do all substitute parts maintain RoHS3 compliance?

A: Yes, both the AOD7N65 and IPD65R1K4C6ATMA1 are ROHS3 compliant, matching the STDLED656 environmental certification. All three parts have MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions during storage and handling.

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