NTP45N06L Equivalent & Substitute Parts

Part Overview

The NTP45N06L is an N-Channel 60V 45A MOSFET manufactured by onsemi in a Through Hole TO-220 package. This device is classified as Obsolete, indicating it is no longer in active production. The part operates across a temperature range of -55°C to 175°C and is rated for 2.4W power dissipation at Ta and 125W at Tj. Due to its obsolete status, equivalent substitute parts are necessary for new designs and ongoing production requirements. Suitable alternatives must maintain the same voltage rating (60V Vdss), compatible current handling capability, and identical TO-220 package configuration.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	60	V
Continuous Drain Current (Id) @ 25°C	45	A
FET Type	N-Channel	—
Technology	MOSFET (Metal Oxide)	—
Rds On (Max) @ Id, Vgs	28 mOhm @ 22.5A, 5V	—
Vgs(th) (Max) @ Id	2	V @ 250µA
Gate Charge (Qg) (Max) @ Vgs	32	nC @ 5V
Operating Temperature Range	-55 to 175	°C
Package Type	TO-220-3	—
Mounting Type	Through Hole	—
Power Dissipation (Max)	2.4 (Ta), 125 (Tj)	W

Substitute Part Grouping Explanation

Substitution of the NTP45N06L is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Drain to Source Voltage (Vdss): Must equal 60V
FET Type: Must be N-Channel
Technology: Must be MOSFET (Metal Oxide)
Package: Must be TO-220-3 Through Hole configuration
Operating Temperature Range: Must support -55°C to 175°C minimum

Secondary Compatibility Parameters:

Continuous Drain Current (Id): Substitute must meet or exceed 45A at 25°C
Rds On characteristics: Lower or equivalent on-resistance values are acceptable
Gate Charge (Qg): Values provided for reference; no substitution restriction
Vgs(th): Threshold voltage must be compatible with 5V drive voltage

The substitute parts listed below satisfy all primary criteria and maintain electrical compatibility within the specified operating conditions.

Parameter Comparison

Parameter	NTP45N06L (onsemi)	STP45NF06 (STMicroelectronics)	STP55NF06L (STMicroelectronics)	IRFZ44EPBF (Infineon)	PSMN4R6-60PS,127 (Nexperia)	PSMN3R0-60PS,127 (Nexperia)
Vdss	60V	60V	60V	60V	60V	60V
Id @ 25°C	45A (Ta)	38A (Tc)	55A (Tc)	48A (Tc)	100A (Tc)	100A (Tc)
FET Type	N-Channel	N-Channel	N-Channel	N-Channel	N-Channel	N-Channel
Technology	MOSFET	MOSFET	MOSFET	MOSFET	MOSFET	MOSFET
Rds On (Max)	28 mOhm @ 22.5A, 5V	28 mOhm @ 19A, 10V	18 mOhm @ 27.5A, 10V	23 mOhm @ 29A, 10V	4.6 mOhm @ 25A, 10V	3 mOhm @ 25A, 10V
Vgs(th) (Max)	2V @ 250µA	4V @ 250µA	1.7V @ 250µA	4V @ 250µA	4V @ 1mA	4V @ 1mA
Gate Charge (Qg)	32 nC @ 5V	58 nC @ 10V	37 nC @ 4.5V	60 nC @ 10V	70.8 nC @ 10V	130 nC @ 10V
Operating Temperature	-55 to 175°C	to 175°C	-55 to 175°C	-55 to 175°C	-55 to 175°C	-55 to 175°C
Package	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3
Product Status	Obsolete	Active	Active	Not For New Designs	Obsolete	Obsolete
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: STP55NF06L (STMicroelectronics)

The STP55NF06L is the preferred substitute for the NTP45N06L. This device is classified as Active product status, ensuring ongoing availability and support. It exceeds the continuous drain current requirement at 55A versus the original 45A specification. The STP55NF06L maintains the identical 60V Vdss rating, TO-220-3 package configuration, and -55°C to 175°C operating temperature range. The part is ROHS3 compliant, addressing regulatory requirements that the original NTP45N06L does not meet. On-resistance characteristics (18 mOhm @ 27.5A, 10V) are superior to the original specification.

Secondary Recommendation: STP45NF06 (STMicroelectronics)

The STP45NF06 provides a closer current rating match at 38A, though this is below the original 45A specification. This device is Active status and ROHS3 compliant. It maintains 60V Vdss, TO-220-3 package, and full temperature range compatibility. The on-resistance specification (28 mOhm @ 19A, 10V) is equivalent to the original part.

Alternative Options: IRFZ44EPBF, PSMN4R6-60PS,127, PSMN3R0-60PS,127

These parts meet all primary substitution criteria with 60V Vdss and TO-220-3 packaging. The IRFZ44EPBF is classified as Not For New Designs. The Nexperia parts (PSMN4R6-60PS,127 and PSMN3R0-60PS,127) are Obsolete status but offer significantly higher current ratings (100A) and superior on-resistance characteristics. All three alternatives are ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can the NTP45N06L be directly replaced with any of the listed substitutes?

A: Direct replacement is possible only if the substitute maintains the same Vdss (60V), FET type (N-Channel), package (TO-220-3), and operating temperature range (-55°C to 175°C). All listed substitutes meet these requirements. However, differences in gate charge, threshold voltage, and on-resistance may require circuit evaluation depending on application-specific timing and thermal requirements.

Q: What is the significance of the different current ratings among substitutes?

A: The NTP45N06L is rated for 45A continuous drain current. Substitutes with higher current ratings (STP55NF06L at 55A, PSMN series at 100A) provide additional thermal margin and can handle higher current loads. Substitutes with lower ratings (STP45NF06 at 38A) operate closer to the original specification and may require thermal management review in high-current applications.

Q: Why is product status important in selecting a substitute?

A: Product status indicates manufacturing availability and long-term support. Active status parts (STP45NF06, STP55NF06L) are recommended for new designs and ongoing production. Obsolete parts may have limited inventory and no future availability. Not For New Designs status indicates the manufacturer is phasing out the product.

Q: Are there differences in gate drive requirements between the NTP45N06L and its substitutes?

A: The NTP45N06L specifies a 5V drive voltage for maximum on-resistance specification. Most substitutes specify 10V drive voltage. The threshold voltage (Vgs(th)) varies across parts: NTP45N06L at 2V, STP55NF06L at 1.7V, and others at 4V. These differences may affect gate driver circuit design and switching speed characteristics.

Q: What does RoHS compliance mean for substitute selection?

A: RoHS3 compliance indicates the part meets Restriction of Hazardous Substances regulations. The original NTP45N06L is RoHS non-compliant. All listed substitutes are ROHS3 compliant, making them suitable for applications requiring regulatory compliance with modern environmental standards.

Q: How do on-resistance (Rds On) differences affect circuit performance?

A: Lower on-resistance reduces power dissipation during conduction. The NTP45N06L specifies 28 mOhm at 22.5A and 5V. Substitutes with lower on-resistance (STP55NF06L at 18 mOhm, Nexperia parts at 3-4.6 mOhm) generate less heat. Higher on-resistance values increase power dissipation and may require enhanced thermal management.

Q: Can substitutes with higher current ratings be used in place of the NTP45N06L?

A: Yes. Substitutes with higher current ratings (PSMN3R0-60PS,127 and PSMN4R6-60PS,127 at 100A) are electrically compatible and provide additional design margin. However, the larger die size and higher input capacitance may affect gate drive circuit performance and switching characteristics. Circuit-level evaluation is necessary to confirm suitability for specific applications.

Q: What package considerations apply to these substitutes?

A: All listed substitutes use the TO-220-3 Through Hole package, identical to the NTP45N06L. This ensures mechanical and thermal interface compatibility with existing PCB layouts and heatsink mounting arrangements. No package redesign is required for direct substitution.

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