NTP45N06 N-Channel 60V 45A MOSFET Equivalent & Substitute Parts

Part Overview

The NTP45N06 is an N-Channel MOSFET manufactured by onsemi, rated for 60V drain-to-source voltage and 45A continuous drain current in a TO-220AB through-hole package. This device is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing applications and new designs. Substitute parts must maintain electrical compatibility across voltage ratings, current handling, gate characteristics, and thermal performance while accommodating packaging and compliance requirements.

Substiute Parts

NTP45N06

onsemiIn Stock: 15392NTP45N06 Datasheet

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IRFZ44EPBF

Infineon TechnologiesIn Stock: 10516IRFZ44EPBF Datasheet

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PSMN3R0-60PS,127

Nexperia USA Inc.In Stock: 2374PSMN3R0-60PS,127 Datasheet

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PSMN4R6-60PS,127

Nexperia USA Inc.In Stock: 8893PSMN4R6-60PS,127 Datasheet

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STP45NF06

STMicroelectronicsIn Stock: 8832STP45NF06 Datasheet

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STP55NF06

STMicroelectronicsIn Stock: 155444STP55NF06 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the NTP45N06 is determined by the following critical electrical and mechanical parameters:

Voltage Rating Compatibility: All substitute parts must maintain a Vdss rating of 60V to ensure safe operation within the original design envelope.

Current Handling: Substitute parts must support continuous drain current at or above 45A to maintain equivalent current-carrying capacity. Parts with higher current ratings (100A) remain compatible as they operate within the same voltage class and provide superior thermal margin.

Gate Characteristics: Gate threshold voltage (Vgs(th)) must remain at 4V ±tolerance to ensure compatible gate drive requirements. Gate charge (Qg) and input capacitance (Ciss) variations affect switching speed and drive circuit design but do not preclude substitution when voltage and current ratings align.

On-State Resistance (Rds On): Variations in Rds On affect power dissipation and thermal performance. Lower Rds On values indicate improved efficiency; higher values require thermal management verification but remain functionally compatible.

Package and Mounting: All identified substitutes utilize TO-220-3 through-hole packaging, ensuring mechanical and thermal interface compatibility.

Temperature Range: Operating temperature range of -55°C to 175°C is maintained across all substitute options.

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (Closest Electrical Match):

STP55NF06 (STMicroelectronics) provides the closest electrical performance to the NTP45N06. It maintains 60V Vdss rating, exceeds the 45A current requirement at 50A, and delivers superior on-state resistance (18 mOhm vs. 26 mOhm). This part is actively manufactured and ROHS3 compliant, eliminating obsolescence risk. Gate characteristics remain compatible with existing drive circuits.

Higher Current Capacity Alternative:

PSMN4R6-60PS,127 and PSMN3R0-60PS,127 (Nexperia) both support 100A continuous drain current at 60V, providing significant thermal margin and reduced on-state losses. These parts are suitable for applications requiring enhanced current handling or thermal performance. Both are ROHS3 compliant. Gate charge and input capacitance are elevated, requiring drive circuit verification for switching frequency compatibility.

Infineon Alternative:

IRFZ44EPBF (Infineon Technologies) operates at 60V with 48A continuous drain current and 23 mOhm on-state resistance. This part is classified as "Not For New Designs" but remains available. ROHS3 compliance is confirmed.

STMicroelectronics Lower Current Option:

STP45NF06 (STMicroelectronics) matches the NTP45N06 current rating at 45A but with slightly higher on-state resistance (28 mOhm). This part is actively manufactured and ROHS3 compliant, making it suitable for new designs where current capacity is not a limiting factor.

Compliance Consideration:

All recommended substitutes are ROHS3 compliant, addressing environmental and regulatory requirements. The original NTP45N06 is RoHS non-compliant; substitution enables compliance with current procurement standards.

Frequently Asked Questions (FAQ)

Q: Can STP55NF06 directly replace NTP45N06 in existing designs?

A: Yes. STP55NF06 maintains identical 60V Vdss rating, exceeds the 45A current requirement, and operates within the same temperature range. Gate threshold voltage (4V) and maximum gate voltage (±20V) are compatible with existing gate drive circuits. The improved on-state resistance (18 mOhm vs. 26 mOhm) reduces power dissipation. No circuit modifications are required.

Q: What is the difference between the Nexperia PSMN4R6-60PS,127 and PSMN3R0-60PS,127?

A: Both parts support 100A continuous drain current at 60V. The PSMN3R0-60PS,127 features lower on-state resistance (3 mOhm vs. 4.6 mOhm) and higher power dissipation capability (306W vs. 211W), resulting in superior thermal performance. The PSMN4R6-60PS,127 has lower gate charge (70.8 nC vs. 130 nC) and input capacitance (4426 pF vs. 8079 pF), enabling faster switching. Selection depends on thermal and switching frequency requirements.

Q: Are there current rating limitations when substituting with higher-rated parts?

A: No. Parts rated for 100A continuous drain current (PSMN series) operate safely at 45A. Higher current ratings provide thermal margin and reduced on-state losses. Gate drive requirements remain unchanged as gate threshold voltage and maximum gate voltage are preserved across all substitutes.

Q: How does on-state resistance (Rds On) affect substitution decisions?

A: Lower Rds On values reduce power dissipation and heat generation. STP55NF06 (18 mOhm) and PSMN series (3-4.6 mOhm) dissipate less power than the original NTP45N06 (26 mOhm) at equivalent current levels. This improves efficiency and may reduce thermal management requirements. Higher Rds On values increase dissipation but remain functionally compatible if thermal design accommodates the additional heat.

Q: What is the significance of gate charge (Qg) differences?

A: Gate charge affects switching speed and gate drive circuit power consumption. Higher Qg values (PSMN series at 70.8-130 nC vs. NTP45N06 at 46 nC) require longer switching transitions and increased drive current. For applications operating at high switching frequencies, lower Qg parts (STP55NF06 at 60 nC) are preferred. At low switching frequencies, Qg differences have minimal impact on circuit performance.

Q: Is the TO-220-3 package identical across all substitutes?

A: Yes. All substitute parts utilize TO-220-3 through-hole packaging with identical pin configuration (Gate, Drain, Source). Mechanical mounting and thermal interface characteristics are compatible. PCB layout modifications are not required.

Q: What compliance advantages do substitute parts offer?

A: All recommended substitutes are ROHS3 compliant, whereas the original NTP45N06 is RoHS non-compliant. Substitution enables compliance with environmental regulations and modern procurement standards. REACH status is "Unaffected" for all parts, indicating no restricted substance concerns.

Q: Can IRFZ44EPBF be used despite "Not For New Designs" status?

A: IRFZ44EPBF is electrically compatible with NTP45N06 (60V, 48A, 4V gate threshold). However, its "Not For New Designs" classification indicates limited long-term availability. For new designs, STP55NF06 or PSMN series are preferred due to active manufacturing status and confirmed long-term supply.

Q: How do input capacitance (Ciss) variations affect circuit design?

A: Input capacitance affects gate drive circuit impedance and switching transient behavior. STP45NF06 and STP55NF06 have lower Ciss values (980-1300 pF) compared to NTP45N06 (1725 pF), enabling faster switching with equivalent drive circuits. PSMN series parts have significantly higher Ciss (4426-8079 pF), requiring higher gate drive current for equivalent switching speed. At low switching frequencies, Ciss differences have minimal practical impact.