IXTP90N055T N-Channel 55V 90A MOSFET Equivalent & Substitute Parts

Part Overview

The IXTP90N055T is an N-Channel power MOSFET manufactured by IXYS, rated for 55V drain-to-source voltage and 90A continuous drain current in the TO-220-3 package. This device is part of the TrenchT2™ series and is currently classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for new designs and ongoing production requirements. Substitute parts must maintain compatibility across critical electrical parameters including voltage rating, current capacity, on-resistance, and thermal characteristics while accommodating the through-hole TO-220-3 mounting standard.

Key Parameters

Parameter	Value	Unit	Specification Condition
Drain-to-Source Voltage (Vdss)	55	V	Maximum rating
Continuous Drain Current (Id)	90	A	At 25°C (Tc)
On-Resistance (Rds On)	8.8	mOhm	At 25A, 10V Vgs
Gate Threshold Voltage (Vgs(th))	4	V	At 50µA Id
Gate Charge (Qg)	61	nC	At 10V Vgs
Input Capacitance (Ciss)	2500	pF	At 25V Vds
Power Dissipation (Max)	176	W	At Tc
Operating Temperature Range	-55 to 175	°C	Junction temperature (TJ)
Package Type	TO-220-3	—	Through-hole mounting
Gate Voltage (Vgs Max)	±20	V	Maximum rating

Substitute Part Grouping Explanation

Substitution of the IXTP90N055T is determined by the following critical parameters:

Primary Compatibility Criteria:

Drain-to-Source Voltage (Vdss): Substitute parts must equal or exceed 55V
Continuous Drain Current (Id): Substitute parts must equal or exceed 90A at 25°C
Package Type: TO-220-3 through-hole mounting required
Operating Temperature Range: -55°C to 175°C minimum
On-Resistance (Rds On): Must be within acceptable range for thermal and efficiency requirements
Gate Threshold Voltage (Vgs(th)): Must be compatible with existing gate drive circuits

Substitution Logic: Parts are grouped into two categories based on voltage and current ratings:

Direct Voltage Equivalents (55V Rating): Parts with 55V Vdss and ≥90A Id provide the closest electrical match. These include IXTP90N055T2, IRL2505PBF, and IRL3705NPBF.
Higher Voltage Alternatives (60V or 75V Rating): Parts with higher Vdss ratings (60V or 75V) are electrically compatible in 55V applications due to voltage derating. These include CSD18534KCS, DMNH6008SCT, DMNH6008SCTQ, IRF1010EZPBF, IRFB3607PBF, and IPP45N06S4L08AKSA1.

All substitute parts maintain the TO-220-3 package format and operate within the -55°C to 175°C temperature range.

Parameter Comparison

Part Number	Manufacturer	Vdss (V)	Id @ 25°C (A)	Rds On (mOhm)	Vgs(th) (V)	Qg (nC)	Ciss (pF)	Pd Max (W)	Status
IXTP90N055T	IXYS	55	90	8.8 @ 25A, 10V	4 @ 50µA	61 @ 10V	2500 @ 25V	176	Obsolete
IXTP90N055T2	IXYS	55	90	8.4 @ 25A, 10V	4 @ 250µA	42 @ 10V	2770 @ 25V	150	Active
CSD18534KCS	Texas Instruments	60	100 (Tc)	9.5 @ 40A, 10V	2.3 @ 250µA	24 @ 10V	1880 @ 30V	107	Active
DMNH6008SCT	Diodes Incorporated	60	130	8 @ 20A, 10V	4 @ 250µA	21 @ 10V	2596 @ 30V	210	Active
DMNH6008SCTQ	Diodes Incorporated	60	130	8 @ 20A, 10V	4 @ 250µA	21 @ 10V	2596 @ 30V	210	Active
IPP45N06S4L08AKSA1	Infineon Technologies	60	45	8.2 @ 45A, 10V	2.2 @ 35µA	64 @ 10V	4780 @ 25V	71	Discontinued at DiGi Electronics
IRF1010EZPBF	Infineon Technologies	60	75	8.5 @ 51A, 10V	4 @ 100µA	86 @ 10V	2810 @ 25V	140	Active
IRFB3607PBF	Infineon Technologies	75	80	9 @ 46A, 10V	4 @ 100µA	84 @ 10V	3070 @ 50V	140	Not For New Designs
IRL2505PBF	Infineon Technologies	55	104	8 @ 54A, 10V	2 @ 250µA	130 @ 5V	5000 @ 25V	200	Not For New Designs
IRL3705NPBF	Infineon Technologies	55	89	10 @ 46A, 10V	2 @ 250µA	98 @ 5V	3600 @ 25V	170	Active
IRL3705ZPBF	International Rectifier	55	75	8 @ 52A, 10V	3 @ 250µA	60 @ 5V	2880 @ 25V	130	Active

Engineering Selection Recommendations

For Direct Replacement (Recommended Primary Choice):

IXTP90N055T2 is the preferred substitute. It maintains the same 55V/90A rating as the original IXTP90N055T, operates within identical temperature ranges, and is manufactured by the same supplier (IXYS). The part is currently in active production status. Electrical parameters are closely matched, with slightly improved on-resistance (8.4 mOhm vs. 8.8 mOhm) and reduced gate charge (42 nC vs. 61 nC), resulting in improved efficiency and faster switching characteristics.

For Higher Current Applications (60V Alternatives):

DMNH6008SCT and DMNH6008SCTQ from Diodes Incorporated provide 130A continuous drain current at 60V, exceeding the original 90A specification. Both parts are AEC-Q101 automotive qualified and RoHS3 compliant. The DMNH6008SCTQ variant includes automotive qualification. These parts are suitable for applications requiring higher current capacity or thermal margin.

For Active Production with Compliance Requirements:

CSD18534KCS (Texas Instruments NexFET™ series) is RoHS3 compliant and actively produced. It provides 100A (Tc) at 60V with improved gate charge characteristics (24 nC vs. 61 nC), enabling faster switching and reduced power dissipation in gate drive circuits.

For 55V Voltage-Matched Alternatives:

IRL3705NPBF and IRL3705ZPBF maintain the 55V rating with 89A and 75A continuous drain current respectively. Both are active production parts with RoHS3 compliance. IRL3705NPBF provides the closest current match to the original specification.

Parts to Avoid for New Designs:

IRFB3607PBF is marked "Not For New Designs" and should not be selected for new applications. IPP45N06S4L08AKSA1 is discontinued at DiGi Electronics and has reduced current capacity (45A) relative to the original specification. IRL2505PBF is marked "Not For New Designs" despite higher current rating.

Frequently Asked Questions (FAQ)

Q: Can I use a 60V-rated MOSFET in place of the 55V IXTP90N055T?

A: Yes. A 60V-rated MOSFET is electrically compatible in a 55V application. The higher voltage rating provides additional safety margin and does not affect circuit operation. All 60V alternatives listed (CSD18534KCS, DMNH6008SCT, DMNH6008SCTQ, IRF1010EZPBF) are suitable substitutes.

Q: What is the difference between DMNH6008SCT and DMNH6008SCTQ?

A: Both parts are electrically identical with matching electrical specifications. DMNH6008SCTQ includes AEC-Q101 automotive qualification, making it suitable for automotive applications. Select DMNH6008SCTQ if automotive qualification is required.

Q: Why does IXTP90N055T2 have lower gate charge than the original IXTP90N055T?

A: Gate charge (Qg) is a design parameter that varies between manufacturing generations. The IXTP90N055T2 represents an improved design with reduced gate charge (42 nC vs. 61 nC), resulting in faster switching speed and lower gate drive power requirements. This is a beneficial improvement for most applications.

Q: Can I use IRL3705ZPBF as a direct replacement?

A: IRL3705ZPBF is electrically compatible but provides 75A continuous drain current compared to the original 90A specification. It is suitable for applications where the full 90A capacity is not required. For applications requiring the full 90A specification, use IXTP90N055T2, IRL3705NPBF, or IRL2505PBF instead.

Q: What is the significance of RoHS3 compliance?

A: RoHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead and other hazardous materials. All active production substitutes listed (IXTP90N055T2, CSD18534KCS, DMNH6008SCT, DMNH6008SCTQ, IRF1010EZPBF, IRL3705NPBF, IRL3705ZPBF) are RoHS3 compliant, making them suitable for applications with environmental compliance requirements.

Q: Are all substitute parts available in TO-220-3 package?

A: Yes. All substitute parts listed in this document are supplied in TO-220-3 through-hole package format, ensuring mechanical and thermal compatibility with the original IXTP90N055T.

Q: Why is IPP45N06S4L08AKSA1 not recommended despite lower on-resistance?

A: IPP45N06S4L08AKSA1 is discontinued at DiGi Electronics and provides only 45A continuous drain current, significantly below the original 90A specification. It is unsuitable for applications requiring the full current capacity of the IXTP90N055T.

Q: What is the operating temperature range for all substitute parts?

A: All substitute parts operate within the -55°C to 175°C junction temperature range, matching the original IXTP90N055T specification.

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