IPD65R660CFDBTMA1 Equivalent & Substitute Parts

Part Overview

The IPD65R660CFDBTMA1 is an N-Channel 650V 6A MOSFET manufactured by Infineon Technologies in the CoolMOS™ series, housed in a TO-252-3 (DPAK) surface mount package. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design requirements and production continuity. Substitute parts must maintain electrical compatibility within the specified voltage, current, and thermal operating parameters while accommodating available packaging and product status considerations.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	650	V
Continuous Drain Current (Id) @ 25°C	6	A
Rds On (Max) @ 2.1A, 10V	660	mOhm
Gate Threshold Voltage (Vgs(th)) @ 200µA	4.5	V
Gate Charge (Qg) @ 10V	22	nC
Power Dissipation (Max)	62.5	W
Operating Temperature Range	-55 to 150	°C
Package Type	TO-252-3 (DPAK)	—
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution of the IPD65R660CFDBTMA1 is determined by the following critical electrical and mechanical parameters:

Primary Compatibility Criteria:

Drain to Source Voltage (Vdss): Substitute parts must equal or exceed 650V
Continuous Drain Current (Id): Substitute parts must equal or exceed 6A at 25°C
On-State Resistance (Rds On): Substitute parts must not significantly exceed 660mOhm to maintain thermal and efficiency characteristics
Gate Threshold Voltage (Vgs(th)): Must remain within ±20V gate drive capability
Package Type: TO-252-3 (DPAK) surface mount configuration required for PCB compatibility
Operating Temperature: Must support -55°C to 150°C range

Substitution Logic: Parts are grouped into two categories based on electrical performance alignment:

Category 1 - Direct Electrical Equivalents: Parts with Vdss ≥ 650V, Id ≥ 6A, and Rds On ≤ 700mOhm, maintaining thermal performance within 10% of the original specification.

Category 2 - Functional Alternatives: Parts with Vdss > 650V or Id > 6A that provide enhanced performance margins while maintaining compatible gate drive and thermal characteristics.

Parameter Comparison

Parameter	IPD65R660CFDBTMA1	IPD65R660CFDATMA2	AOD7S65	FCD850N80Z	STD11N65M2	STD9N65M2
Manufacturer	Infineon	Infineon	Alpha & Omega	onsemi	STMicroelectronics	STMicroelectronics
Vdss (V)	650	700	650	800	650	650
Id @ 25°C (A)	6	6	7	6	7	5
Rds On (mOhm)	660 @ 2.1A	660 @ 2.1A	650 @ 3.5A	850 @ 3A	670 @ 3.5A	900 @ 2.5A
Vgs(th) (V)	4.5 @ 200µA	4.5 @ 200µA	4 @ 250µA	4.5 @ 600µA	4 @ 250µA	4 @ 250µA
Qg (nC)	22 @ 10V	22 @ 10V	9.2 @ 10V	29 @ 10V	12.5 @ 10V	10 @ 10V
Power Dissipation (W)	62.5	63	89	75	85	60
Operating Temp (°C)	-55 to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150	-55 to 150
Package	TO-252-3	TO-252-3	TO-252	TO-252AA	DPAK	DPAK
Product Status	Obsolete	Active	Not For New Designs	Not For New Designs	Active	Active
RoHS Compliance	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3	ROHS3

Engineering Selection Recommendations

Primary Recommendation: IPD65R660CFDATMA2

The IPD65R660CFDATMA2 is the direct successor to the IPD65R660CFDBTMA1 within the Infineon CoolMOS™ CFD2 series. This part maintains identical electrical specifications (Vdss 700V, Id 6A, Rds On 660mOhm) with enhanced voltage rating and improved thermal performance (63W vs. 62.5W). Product status is Active, ensuring long-term availability and supply chain continuity. RoHS3 compliance and REACH unaffected status align with current regulatory requirements. This substitution requires no circuit redesign and provides direct pin-compatible replacement in TO-252-3 packaging.

Secondary Recommendation: STD11N65M2

The STD11N65M2 from STMicroelectronics (MDmesh™ II Plus series) provides enhanced current capability (7A vs. 6A) at identical voltage rating (650V) with comparable on-state resistance (670mOhm vs. 660mOhm). Product status is Active with full RoHS3 compliance. Lower gate charge (12.5nC vs. 22nC) reduces switching losses. DPAK packaging maintains surface mount compatibility. This part is suitable for applications requiring improved thermal margin or higher current transient capability.

Tertiary Recommendation: STD9N65M2

The STD9N65M2 from STMicroelectronics (MDmesh™ series) operates at 650V with 5A continuous current rating. Product status is Active with RoHS3 compliance. This part is applicable for current-limited applications or where lower power dissipation (60W) is advantageous. Gate charge of 10nC provides reduced switching losses compared to the original part. DPAK packaging maintains mechanical compatibility.

Not Recommended for New Designs:

AOD7S65 and FCD850N80Z are designated "Not For New Designs" by their respective manufacturers. While electrically functional, these parts should not be selected for new product development due to manufacturer lifecycle status. Existing designs using these parts may continue operation, but migration to Active-status alternatives is advised for long-term sustainability.

Frequently Asked Questions (FAQ)

Q1: Can the IPD65R660CFDATMA2 be used as a direct replacement for the IPD65R660CFDBTMA1?

A: Yes. The IPD65R660CFDATMA2 is electrically and mechanically compatible. Both parts share identical drain current (6A), on-state resistance (660mOhm), gate threshold voltage (4.5V), and gate charge (22nC) specifications. The IPD65R660CFDATMA2 features a higher voltage rating (700V vs. 650V), which provides additional design margin without affecting circuit operation. TO-252-3 packaging is identical, enabling direct PCB substitution.

Q2: What is the significance of the "Obsolete" product status for the IPD65R660CFDBTMA1?

A: Obsolete status indicates the manufacturer has discontinued production and support for this part. While existing inventory may remain available, long-term supply cannot be guaranteed. Substitution with Active-status alternatives (IPD65R660CFDATMA2, STD11N65M2, or STD9N65M2) ensures design continuity and eliminates future supply chain risk.

Q3: How do gate charge differences affect circuit performance?

A: Gate charge (Qg) determines the energy required to switch the MOSFET on and off. The original part specifies 22nC at 10V. STD11N65M2 (12.5nC) and STD9N65M2 (10nC) require less gate drive energy, reducing switching losses and potentially improving overall circuit efficiency. AOD7S65 (9.2nC) offers the lowest gate charge but carries "Not For New Designs" status. Higher gate charge (FCD850N80Z at 29nC) increases switching losses but may improve EMI characteristics in some applications.

Q4: Why do some substitute parts have higher drain current ratings (7A) than the original (6A)?

A: Higher current ratings provide thermal margin and allow the part to handle transient current spikes without exceeding absolute maximum ratings. STD11N65M2 and AOD7S65 both offer 7A continuous current at 25°C, compared to 6A for the original part. This enhancement does not require circuit modification and improves reliability in applications with variable load conditions.

Q5: What is the impact of on-state resistance (Rds On) variation among substitute parts?

A: On-state resistance directly affects power dissipation and thermal performance. Lower Rds On reduces I²R losses. The original part specifies 660mOhm at 2.1A, 10V. STD11N65M2 (670mOhm) and AOD7S65 (650mOhm) are closely matched. STD9N65M2 (900mOhm) exhibits higher resistance, resulting in increased power dissipation (60W vs. 62.5W nominal). FCD850N80Z (850mOhm) also shows elevated resistance. Selection depends on thermal budget and efficiency requirements.

Q6: Are all substitute parts compatible with the same PCB layout and thermal management design?

A: All recommended substitute parts use TO-252-3 (DPAK) or equivalent surface mount packaging with identical pin configuration and thermal pad dimensions. PCB layout compatibility is maintained. However, parts with higher power dissipation (AOD7S65 at 89W, STD11N65M2 at 85W, FCD850N80Z at 75W) may require enhanced thermal management compared to the original 62.5W specification. Verify thermal pad copper area and heat sink design accommodate the selected substitute's power rating.

Q7: What compliance certifications should be verified for substitute parts?

A: All recommended substitute parts carry RoHS3 compliance and REACH unaffected status, matching the original part's regulatory standing. ECCN classification (EAR99) and HTSUS code (8541.29.0095) are identical across all parts, ensuring consistent export and tariff treatment. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all parts, indicating no special moisture control requirements during storage or handling.

Q8: Which substitute part is recommended for applications requiring the lowest switching losses?

A: AOD7S65 offers the lowest gate charge (9.2nC at 10V), minimizing switching energy. However, this part carries "Not For New Designs" status. Among Active-status alternatives, STD9N65M2 (10nC) provides the lowest gate charge, followed by STD11N65M2 (12.5nC). For new designs prioritizing switching efficiency, STD9N65M2 is the recommended choice.

Q9: Can substitute parts with higher voltage ratings (700V or 800V) be used in 650V applications?

A: Yes. Higher voltage-rated parts (IPD65R660CFDATMA2 at 700V, FCD850N80Z at 800V) can operate in 650V applications. The higher voltage rating provides additional design margin and does not affect circuit operation at lower voltages. However, verify that the substitute part's other electrical characteristics (current, resistance, gate charge) remain compatible with the circuit design.

Q10: What is the difference between TO-252-3 and TO-252AA packaging?

A: Both are surface mount DPAK packages with identical pin configuration and thermal pad dimensions. TO-252-3 is the standard designation, while TO-252AA is an alternative designation used by some manufacturers (onsemi). These packages are mechanically and electrically interchangeable for PCB assembly purposes.

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