IXTY50N085T N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The IXTY50N085T is an N-Channel MOSFET manufactured by IXYS in the TrenchMV™ series, rated for 85V drain-to-source voltage and 50A continuous drain current in a TO-252AA surface mount package. This device is classified as obsolete product status. Identification of equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	85	V
Continuous Drain Current (Id) @ 25°C	50	A (Tc)
On-Resistance (Rds On) @ 25A, 10V	23	mOhm
Gate Threshold Voltage (Vgs(th)) @ 25µA	4	V
Gate Charge (Qg) @ 10V	34	nC
Power Dissipation (Max)	130	W (Tc)
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	TO-252-3 (DPAK)	Surface Mount
Moisture Sensitivity Level	1 (Unlimited)	MSL

Substitute Part Grouping Explanation

Substitution of the IXTY50N085T is determined by the following critical parameters:

Voltage Rating Compatibility: Substitute parts must have a Vdss rating equal to or greater than 85V to maintain circuit protection margins.

Current Rating Compatibility: Substitute parts must have continuous drain current (Id) ratings of 40A or greater to support the 50A requirement of the original design, with consideration for thermal derating.

On-Resistance (Rds On): Substitute parts must maintain Rds On values within acceptable limits to prevent excessive power dissipation and thermal stress. The reference value is 23mOhm at specified conditions.

Package Compatibility: All substitute parts must use the TO-252-3 (DPAK) surface mount package to ensure mechanical and thermal interface compatibility.

Operating Temperature Range: Substitute parts must support the full -55°C to 175°C operating range or equivalent thermal specifications.

Gate Charge and Threshold Voltage: These parameters must remain within reasonable ranges to ensure gate drive circuit compatibility and switching performance.

The following substitute parts meet these criteria based on their electrical specifications and package configuration.

Parameter Comparison

Parameter	IXTY50N085T	IXTY44N10T	DMT8012LK3-13	FDD86326	IRFR3710ZTRLPBF	NVD6824NLT4G-VF01	STD47N10F7AG
Manufacturer	IXYS	IXYS	Diodes Inc.	onsemi	Infineon	onsemi	STMicroelectronics
Vdss (V)	85	100	80	80	100	100	100
Id @ 25°C (A)	50 (Tc)	44 (Tc)	44 (Tc)	37 (Tc)	42 (Tc)	41 (Tc)	45 (Tc)
Rds On (mOhm)	23 @ 25A, 10V	30 @ 22A, 10V	17 @ 12A, 10V	23 @ 8A, 10V	18 @ 33A, 10V	20 @ 20A, 10V	18 @ 22.5A, 10V
Vgs(th) (V)	4 @ 25µA	4.5 @ 25µA	3 @ 250µA	4 @ 250µA	4 @ 250µA	2.5 @ 250µA	4.5 @ 250µA
Qg (nC)	34 @ 10V	33 @ 10V	34 @ 10V	19 @ 10V	100 @ 10V	66 @ 10V	25 @ 10V
Power Dissipation (W)	130 (Tc)	130 (Tc)	2.7 (Ta)	62 (Tc)	140 (Tc)	90 (Tc)	60 (Tc)
Operating Temp (°C)	-55 to 175	-55 to 175	-55 to 150	-55 to 150	-55 to 175	-55 to 175	-55 to 175
Package	TO-252AA	TO-252AA	TO-252-3	TO-252AA	TO-252AA	DPAK	DPAK
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

IXTY44N10T and IRFR3710ZTRLPBF are the primary substitute options. Both devices maintain active product status, support the full -55°C to 175°C operating temperature range, and are ROHS3 compliant. IXTY44N10T provides the closest electrical match with 44A continuous drain current and similar gate charge characteristics. IRFR3710ZTRLPBF offers superior on-resistance performance (18mOhm) and higher power dissipation capability (140W), making it suitable for applications requiring enhanced thermal performance.

Secondary Substitutes (Conditional Compatibility):

NVD6824NLT4G-VF01 is qualified to AEC-Q101 automotive standards and provides 41A continuous drain current with 100V voltage rating. This device is suitable for automotive-grade applications requiring enhanced reliability qualification.

STD47N10F7AG is qualified to AEC-Q101 automotive standards and provides 45A continuous drain current with 100V voltage rating and optimized gate charge (25nC), making it suitable for automotive applications with stringent switching performance requirements.

Limited Substitutes (Reduced Current Rating):

FDD86326 and DMT8012LK3-13 provide reduced continuous drain current ratings (37A and 44A respectively) and lower power dissipation specifications. These devices are suitable only for applications where the full 50A current requirement can be reduced or where thermal management is enhanced through design modifications.

Compliance Considerations:

All active substitute parts are ROHS3 compliant and REACH unaffected. The IXTY50N085T obsolete status necessitates transition to one of the active alternatives for new designs and long-term production support.

Frequently Asked Questions (FAQ)

Q: Can IXTY44N10T directly replace IXTY50N085T in existing designs?

A: IXTY44N10T is electrically compatible for most applications. The 44A continuous drain current rating is lower than the original 50A specification. Verify that your application current requirements do not exceed 44A at the specified thermal conditions. The 100V voltage rating provides additional margin above the original 85V specification. Gate charge and threshold voltage are comparable, requiring no gate drive circuit modifications.

Q: What is the primary difference between IRFR3710ZTRLPBF and IXTY44N10T?

A: IRFR3710ZTRLPBF offers superior on-resistance (18mOhm versus 30mOhm) and higher power dissipation capability (140W versus 130W). This device is preferred for applications requiring lower conduction losses and enhanced thermal performance. Gate charge is significantly higher (100nC versus 33nC), which may require gate drive circuit evaluation for switching speed compatibility.

Q: Are automotive-qualified alternatives available?

A: Yes. NVD6824NLT4G-VF01 and STD47N10F7AG are both AEC-Q101 qualified. STD47N10F7AG provides 45A continuous drain current with optimized gate charge (25nC), making it suitable for automotive applications requiring both current capacity and switching performance.

Q: Why do some substitute parts have lower power dissipation ratings?

A: Power dissipation ratings reflect thermal specifications under specific test conditions (Ta or Tc). FDD86326 and DMT8012LK3-13 specify lower power dissipation under ambient temperature (Ta) conditions. These devices may still support equivalent thermal performance under case temperature (Tc) conditions with appropriate thermal management. Consult device datasheets for thermal resistance specifications.

Q: Is the TO-252-3 (DPAK) package identical across all substitutes?

A: Yes. All substitute parts use the TO-252-3 (DPAK) surface mount package with identical mechanical dimensions and thermal interface characteristics. PCB layout modifications are not required for package compatibility.

Q: What is the impact of different gate charge specifications?

A: Gate charge affects switching speed and gate drive power requirements. IRFR3710ZTRLPBF has significantly higher gate charge (100nC) compared to the original (34nC), requiring evaluation of gate drive circuit current capacity. STD47N10F7AG has lower gate charge (25nC), potentially enabling faster switching. Verify gate drive circuit specifications before selection.

Q: Can DMT8012LK3-13 be used in high-current applications?

A: DMT8012LK3-13 provides 44A continuous drain current, which is below the original 50A specification. This device is suitable only for applications where current requirements can be reduced or where thermal management is enhanced. The lower on-resistance (17mOhm) provides improved efficiency but does not compensate for reduced current capacity in high-current designs.

Q: What compliance certifications apply to all active substitutes?

A: All active substitute parts are ROHS3 compliant and REACH unaffected. NVD6824NLT4G-VF01 and STD47N10F7AG carry additional AEC-Q101 automotive qualification. REACH unaffected status indicates these devices are not subject to REACH substance restrictions.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message