IXTQ470P2 N-Channel 500V 42A MOSFET Equivalent & Substitute Parts

Part Overview

The IXTQ470P2 is an N-Channel metal oxide semiconductor field-effect transistor (MOSFET) rated for 500V drain-to-source voltage with 42A continuous drain current at 25°C. Manufactured by IXYS, this device is housed in a TO-3P package and is designed for high-voltage switching applications requiring significant power dissipation capability (830W at Tc). The part carries a Last Time Buy product status, indicating that the original manufacturer has discontinued or will discontinue production. Identification of equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications currently utilizing the IXTQ470P2.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	500	V
Continuous Drain Current (Id) @ 25°C	42	A (Tc)
Power Dissipation (Max)	830	W (Tc)
On-State Resistance (Rds On Max) @ 10V	145	mOhm @ 500mA
Gate Threshold Voltage (Vgs(th) Max)	4.5	V @ 250µA
Gate Charge (Qg Max) @ 10V	88	nC
Input Capacitance (Ciss Max) @ 25V	5400	pF
Operating Temperature Range	-55 to 150	°C (TJ)
Package Type	TO-3P	Through Hole
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the IXTQ470P2 is determined by electrical and mechanical compatibility across the following critical parameters:

Voltage Rating: All substitute parts must maintain a minimum Vdss of 500V to ensure safe operation in the original application circuit.

Current Rating: Substitute parts must support continuous drain current at or above the application requirement. The IXTQ470P2 specifies 42A (Tc); substitutes with equal or higher current ratings are acceptable.

Package Type: The IXTQ470P2 uses a TO-3P through-hole package. Substitutes must use identical or mechanically compatible package designations to ensure proper PCB mounting and thermal interface.

On-State Resistance (Rds On): This parameter directly affects power dissipation and switching losses. Substitutes with equal or lower Rds On values maintain or improve circuit efficiency.

Gate Charge and Input Capacitance: These parameters influence gate drive requirements and switching speed. Substitutes with comparable or lower values ensure compatibility with existing gate drive circuits.

Operating Temperature Range: Substitutes must support the full operating temperature range of -55°C to 150°C (TJ) to maintain reliability across all application conditions.

Compliance and Certifications: All substitutes must maintain ROHS3 compliance and REACH unaffected status to meet regulatory requirements.

Parameter Comparison

Parameter	IXTQ470P2	IXTQ44N50P	STW28NM50N	Unit
Manufacturer	IXYS	IXYS	STMicroelectronics	-
FET Type	N-Channel	N-Channel	N-Channel	-
Vdss	500	500	500	V
Id @ 25°C	42	44	21	A (Tc)
Rds On (Max) @ 10V	145	140	158	mOhm
Vgs(th) (Max)	4.5	5	4	V @ 250µA
Qg (Max) @ 10V	88	98	50	nC
Ciss (Max) @ 25V	5400	5440	1735	pF
Power Dissipation (Max)	830	658	150	W (Tc)
Operating Temperature	-55 to 150	-55 to 150	-55 to 150	°C (TJ)
Package Type	TO-3P	TO-3P	TO-247-3	-
Product Status	Last Time Buy	Active	Active	-
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	-

Engineering Selection Recommendations

IXTQ44N50P (IXYS Polar Series): This part is the primary recommended substitute for the IXTQ470P2. Both devices are manufactured by IXYS, share identical voltage ratings (500V Vdss), and use the same TO-3P package. The IXTQ44N50P provides 44A continuous drain current, exceeding the IXTQ470P2 specification of 42A. On-state resistance is marginally lower (140 mOhm vs. 145 mOhm), resulting in improved efficiency. Power dissipation capability is reduced to 658W, which may require thermal design review for applications operating at maximum power levels. The IXTQ44N50P maintains active product status with full ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), ensuring long-term availability and regulatory compliance.

STW28NM50N (STMicroelectronics MDmesh™ II Series): This part provides a secondary substitute option with identical 500V voltage rating and active product status. However, the STW28NM50N is rated for only 21A continuous drain current, representing a 50% reduction from the IXTQ470P2 specification. Power dissipation is significantly lower at 150W. The package type differs (TO-247-3 versus TO-3P), requiring PCB layout and thermal interface modifications. Gate charge is substantially lower (50 nC vs. 88 nC), and input capacitance is reduced (1735 pF vs. 5400 pF), potentially improving switching performance in gate-drive-limited applications. This substitute is suitable only for applications where current and power dissipation requirements are substantially lower than the original design specification.

Both substitutes maintain ROHS3 compliance, REACH unaffected status, and full operating temperature range compatibility (-55°C to 150°C TJ). Selection between these options depends on application current and power dissipation requirements relative to the original IXTQ470P2 design.

Frequently Asked Questions (FAQ)

Q: Can the IXTQ44N50P directly replace the IXTQ470P2 without circuit modifications?

A: The IXTQ44N50P is mechanically and electrically compatible with the IXTQ470P2 in TO-3P package applications. Both devices share identical voltage ratings, gate drive voltage requirements, and operating temperature ranges. The higher current rating (44A vs. 42A) and lower on-state resistance (140 mOhm vs. 145 mOhm) of the IXTQ44N50P provide improved performance margins. However, thermal design review is recommended due to the reduced power dissipation rating (658W vs. 830W). No gate drive circuit modifications are required.

Q: Why is the STW28NM50N listed as a substitute if it has lower current and power ratings?

A: The STW28NM50N meets the fundamental electrical requirements (500V Vdss, N-Channel MOSFET, through-hole mounting) and is suitable for applications where the actual operating current and power dissipation are substantially lower than the IXTQ470P2 maximum ratings. This part is not a direct replacement for all IXTQ470P2 applications but serves as an alternative for designs with reduced current demands. The TO-247-3 package requires PCB layout changes.

Q: What is the impact of package type differences between TO-3P and TO-247-3?

A: The TO-3P and TO-247-3 packages have different mechanical dimensions, lead configurations, and thermal interface characteristics. TO-3P uses a three-lead configuration with a mounting tab, while TO-247-3 uses a different lead arrangement. PCB footprints, mounting hardware, and thermal management solutions (heatsinks, thermal interface materials) are not interchangeable. Applications using TO-3P packages cannot accommodate TO-247-3 devices without significant PCB redesign.

Q: Are there any gate drive circuit compatibility concerns with these substitutes?

A: The IXTQ44N50P maintains gate charge (98 nC vs. 88 nC) and input capacitance (5440 pF vs. 5400 pF) characteristics nearly identical to the IXTQ470P2, ensuring compatibility with existing gate drive circuits. The STW28NM50N has substantially lower gate charge (50 nC) and input capacitance (1735 pF), which may improve switching speed but does not create incompatibility with standard gate drive designs. Gate drive voltage requirements remain consistent at 10V across all three devices.

Q: What is the significance of the Last Time Buy status for the IXTQ470P2?

A: Last Time Buy status indicates that IXYS has announced discontinuation of the IXTQ470P2. This designation establishes a final purchase window before production ends. Existing inventory may become unavailable, making identification of active substitute parts essential for long-term design support and supply chain continuity. The IXTQ44N50P and STW28NM50N both maintain active product status with established supply channels.

Q: Do all three parts meet current regulatory compliance requirements?

A: Yes. The IXTQ470P2, IXTQ44N50P, and STW28NM50N are all ROHS3 compliant and REACH unaffected. All three devices carry ECCN classification EAR99 and HTSUS code 8541.29.0095. Moisture sensitivity level is MSL 1 (unlimited) for all parts, indicating no special storage or handling requirements. These compliance characteristics ensure regulatory acceptance in current manufacturing environments.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message