IXTP32N65X N-Channel 650V 32A MOSFET Equivalent & Substitute Parts

Part Overview

The IXTP32N65X is an N-Channel 650V 32A MOSFET manufactured by IXYS in the Ultra X series, housed in a TO-220-3 through-hole package. This device is rated for 500W power dissipation and operates across a temperature range of -55°C to 150°C. The part is designated as Last Time Buy, indicating that alternative solutions are necessary for new designs and long-term availability planning. Equivalent and substitute parts are identified based on matching or exceeding critical electrical parameters while maintaining compatible package configurations and compliance standards.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	650	V
Continuous Drain Current (Id) @ 25°C	32	A
On-State Resistance (Rds On) @ 16A, 10V	135	mOhm
Gate Threshold Voltage (Vgs(th)) @ 250µA	5.5	V
Gate Charge (Qg) @ 10V	54	nC
Input Capacitance (Ciss) @ 25V	2205	pF
Power Dissipation (Max)	500	W
Operating Temperature Range	-55 to 150	°C
Package Type	TO-220-3	—
FET Type	N-Channel	—

Substitute Part Grouping Explanation

Substitution of the IXTP32N65X is determined by the following critical parameters:

Voltage Rating: All substitute parts must maintain a Drain to Source Voltage (Vdss) of 650V or higher to ensure safe operation in the same circuit topology.

Current Rating: Substitute parts must support a continuous drain current (Id) of 32A or greater at 25°C to handle equivalent or increased load conditions.

On-State Resistance (Rds On): Lower or equivalent Rds On values ensure comparable or improved efficiency and thermal performance. The reference value is 135mOhm @ 16A, 10V.

Package Compatibility: Substitutes are grouped by package type. TO-220-3 packages are directly interchangeable in the same PCB footprint. TO-247-3 packages require modified board layout but maintain electrical equivalence.

Compliance and Status: All substitute parts maintain RoHS3 compliance and REACH unaffected status. Product status (Active vs. Last Time Buy) influences suitability for new designs.

Operating Temperature: All parts operate within -55°C to 150°C range, ensuring thermal compatibility.

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ 25°C (A)	Rds On (mOhm)	Qg (nC)	Package	Power (W)	Status
IXTP32N65X	IXYS	650	32	135 @ 16A	54	TO-220-3	500	Last Time Buy
IXTP34N65X2	IXYS	650	34	96 @ 17A	54	TO-220-3	540	Active
IXTH32N65X	IXYS	650	32	135 @ 16A	54	TO-247-3	500	Last Time Buy
AOT42S60L	Alpha & Omega Semiconductor	600	37	99 @ 21A	40	TO-220-3	417	Not For New Designs
IPP65R110CFDAAKSA1	Infineon Technologies	650	31.2	110 @ 12.7A	118	TO-220-3	277.8	Active
STP30N65M5	STMicroelectronics	650	22	139 @ 11A	64	TO-220-3	140	Active

Engineering Selection Recommendations

Primary Recommendation: IXTP34N65X2

The IXTP34N65X2 is the manufacturer-recommended substitute. It maintains the same 650V voltage rating and TO-220-3 package as the IXTP32N65X while offering improved performance characteristics. The part features a higher continuous drain current (34A vs. 32A), lower on-state resistance (96mOhm vs. 135mOhm), and increased power dissipation capability (540W vs. 500W). The IXTP34N65X2 is Active status, ensuring long-term availability and suitability for new designs. Gate charge remains identical at 54nC, maintaining gate drive compatibility.

Secondary Recommendation: IXTH32N65X

The IXTH32N65X provides parametric equivalence to the IXTP32N65X with identical electrical specifications (650V, 32A, 135mOhm Rds On, 54nC gate charge). The primary difference is the TO-247-3 package, which requires modified PCB layout and mounting hardware but offers superior thermal performance through increased lead surface area. This part is suitable when thermal management is critical and board redesign is feasible. Both parts share Last Time Buy status.

Alternative for Voltage-Tolerant Applications: IPP65R110CFDAAKSA1

The IPP65R110CFDAAKSA1 maintains the 650V voltage rating and TO-220-3 package with Active product status. It supports 31.2A continuous current and features automotive-grade qualification (AEC-Q101). This part is appropriate for applications where automotive compliance is required. The higher gate charge (118nC vs. 54nC) requires verification of gate drive circuit capability.

Not Recommended for New Designs: AOT42S60L and STP30N65M5

The AOT42S60L carries Not For New Designs status and operates at reduced voltage (600V vs. 650V), making it unsuitable for circuits requiring full 650V rating. The STP30N65M5 supports only 22A continuous current, below the 32A requirement of the original part, and is limited to 140W power dissipation. Neither part is recommended for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can the IXTP34N65X2 be used as a direct drop-in replacement for the IXTP32N65X?

A: Yes. Both parts share identical TO-220-3 package geometry, pinout, and 650V voltage rating. The IXTP34N65X2 offers superior electrical performance with higher current rating (34A vs. 32A) and lower on-state resistance (96mOhm vs. 135mOhm). No PCB modifications are required. Gate drive circuits require no adjustment as gate charge remains at 54nC.

Q: What is the primary difference between the IXTP32N65X and IXTH32N65X?

A: The IXTH32N65X is electrically identical to the IXTP32N65X but uses a TO-247-3 package instead of TO-220-3. The TO-247-3 package provides improved thermal performance through larger lead surface area and is suitable for high-power applications. PCB layout and mounting hardware must be modified to accommodate the different package footprint.

Q: Why is the IPP65R110CFDAAKSA1 listed as a similar part rather than a direct equivalent?

A: The IPP65R110CFDAAKSA1 maintains the 650V voltage rating and TO-220-3 package but differs in several parameters. The continuous drain current is 31.2A (slightly below 32A), on-state resistance is 110mOhm (lower than 135mOhm), and gate charge is significantly higher at 118nC (vs. 54nC). The higher gate charge requires verification that existing gate drive circuits can supply the necessary charge within acceptable switching times. The part carries automotive qualification (AEC-Q101), making it suitable for automotive applications.

Q: Can the AOT42S60L be used as a substitute?

A: The AOT42S60L is not recommended as a direct substitute. Although it offers higher current capability (37A) and lower on-state resistance (99mOhm), it operates at 600V, which is 50V below the 650V rating of the IXTP32N65X. Using this part in a 650V circuit violates the device voltage rating and creates reliability risk. Additionally, the part carries Not For New Designs status, indicating end-of-life status.

Q: What does Last Time Buy status mean for the IXTP32N65X?

A: Last Time Buy status indicates that the manufacturer will discontinue production after a specified date. Existing inventory may be available for a limited period, but long-term supply cannot be guaranteed. For new designs or applications requiring extended component availability, migration to an Active status part such as the IXTP34N65X2 is necessary.

Q: Are all listed substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed in this reference maintain RoHS3 compliance and REACH unaffected status, ensuring compatibility with environmental and regulatory requirements.

Q: How does gate charge affect substitution decisions?

A: Gate charge (Qg) determines the amount of charge that must be supplied by the gate drive circuit to switch the MOSFET. The IXTP32N65X requires 54nC at 10V. The IXTP34N65X2 and IXTH32N65X maintain this value, ensuring gate drive compatibility without modification. The IPP65R110CFDAAKSA1 requires 118nC, which may exceed the capability of existing gate drive circuits and requires verification before substitution.

Q: What is the significance of the operating temperature range?

A: All substitute parts operate within -55°C to 150°C, matching the IXTP32N65X specification. This ensures thermal compatibility in the same application environment. The IPP65R110CFDAAKSA1 specifies a minimum operating temperature of -40°C, which is acceptable for most industrial and automotive applications but may not be suitable for extreme cold-weather environments requiring -55°C operation.

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