NDP603AL N-Channel MOSFET 30V 25A Equivalent & Substitute Parts

Part Overview

The NDP603AL is an N-Channel MOSFET manufactured by onsemi, rated for 30V drain-to-source voltage and 25A continuous drain current in a Through Hole TO-220-3 package. This device is classified as Obsolete, making identification of equivalent and substitute parts necessary for ongoing production support, maintenance, and design continuity.

The NDP603AL serves applications requiring moderate-current switching and linear regulation in power management circuits. Due to its obsolete status, equivalent parts from active manufacturers provide continuity for procurement and system reliability.

Substiute Parts

NDP603AL

onsemiIn Stock: 16350NDP603AL Datasheet

Current PartRFQ

PSMN022-30PL,127

Nexperia USA Inc.In Stock: 9036PSMN022-30PL,127 Datasheet

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STP40NF03L

STMicroelectronicsIn Stock: 15504STP40NF03L Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the NDP603AL is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Drain-to-Source Voltage (Vdss): Must equal or exceed 30V
• Continuous Drain Current (Id): Must equal or exceed 25A at 25°C
• Gate-Source Voltage (Vgs): Must accommodate ±20V maximum rating
• On-State Resistance (Rds On): Must not exceed 22 mOhm at rated conditions to maintain thermal performance

Mechanical Compatibility Requirements:

• Package Type: TO-220-3 or TO-220AB (mechanically compatible through-hole packages)
• Mounting Type: Through Hole
• Pin Configuration: Standard TO-220 three-pin layout

Regulatory and Compliance Requirements:

• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• REACH Status: REACH Unaffected
• ECCN Classification: EAR99

The substitute parts listed below meet all electrical parameters equal to or exceeding the NDP603AL specification, maintain mechanical compatibility with TO-220 footprints, and satisfy regulatory requirements.

Parameter Comparison

Engineering Selection Recommendations

PSMN022-30PL,127 (Nexperia USA Inc.): This substitute provides 30A continuous drain current, exceeding the NDP603AL requirement of 25A. The device maintains identical 30V Vdss rating and 22 mOhm on-state resistance specification. The PSMN022-30PL,127 is classified as Obsolete but carries ROHS3 Compliant certification, providing regulatory advantage over the NDP603AL. The TO-220AB package is mechanically compatible with TO-220-3 footprints. Lower gate charge (9 nC versus 40 nC) and reduced input capacitance (447 pF versus 1100 pF) result in faster switching characteristics. This part is suitable for direct replacement in existing designs where the lower minimum operating temperature (-55°C versus -65°C) is acceptable.

STP40NF03L (STMicroelectronics): This substitute provides 40A continuous drain current, significantly exceeding the NDP603AL requirement of 25A, with identical 30V Vdss rating and 22 mOhm on-state resistance. The STP40NF03L is classified as Not For New Designs but carries ROHS3 Compliant certification. The TO-220 package is mechanically compatible with TO-220-3 footprints. Higher power dissipation rating (70W versus 50W) provides thermal margin. Lower gate threshold voltage (2.5V versus 3V) and reduced gate charge (15 nC versus 40 nC) enable faster switching response. The maximum gate-source voltage is ±16V, which is lower than the NDP603AL ±20V rating; this requires verification that circuit gate drive voltage does not exceed ±16V. This part is suitable for applications requiring higher current capacity and improved thermal performance.

Frequently Asked Questions (FAQ)

Q: Can PSMN022-30PL,127 or STP40NF03L be used as direct pin-for-pin replacements for NDP603AL?

A: Yes. Both substitute parts use standard TO-220 three-pin through-hole packages with identical pin assignments (Gate, Drain, Source). The mechanical footprint is compatible with NDP603AL PCB layouts. No circuit board modifications are required for package compatibility.

Q: What is the difference between TO-220-3 and TO-220AB packages?

A: TO-220-3 and TO-220AB are functionally equivalent through-hole packages with identical pin spacing and thermal characteristics. Both are standard TO-220 variants used interchangeably in circuit design. The designation difference reflects manufacturer nomenclature; electrical and mechanical performance are equivalent.

Q: Are there thermal performance differences between the substitute parts and NDP603AL?

A: Yes. The STP40NF03L provides higher power dissipation rating (70W versus 50W), offering greater thermal margin in high-current applications. The PSMN022-30PL,127 provides lower power dissipation (41W), which may require thermal management verification in applications operating near the 50W limit. Both substitutes maintain identical on-state resistance (22 mOhm), so thermal performance differences are primarily determined by power dissipation rating and application current levels.

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

A: Gate charge affects switching speed and gate drive circuit requirements. The NDP603AL requires 40 nC at 10V, while PSMN022-30PL,127 requires only 9 nC and STP40NF03L requires 15 nC. Lower gate charge enables faster switching transitions and reduces gate drive power consumption. Existing gate drive circuits designed for the NDP603AL will operate the substitute parts with improved switching performance; no gate drive circuit redesign is necessary.

Q: Is the lower minimum operating temperature of substitute parts (-55°C versus -65°C) a limitation?

A: The NDP603AL operates from -65°C to 175°C, while both substitutes operate from -55°C to 175°C. This difference is significant only for applications requiring operation below -55°C. For standard industrial and commercial temperature ranges, this difference is not a practical limitation. Verify application minimum operating temperature requirements before selection.

Q: What is the impact of the STP40NF03L maximum gate-source voltage (±16V) versus NDP603AL (±20V)?

A: The STP40NF03L maximum Vgs rating of ±16V is lower than the NDP603AL ±20V rating. This requires verification that the circuit gate drive voltage does not exceed ±16V. If the circuit applies gate voltages between ±16V and ±20V, the STP40NF03L is not suitable. For standard gate drive circuits operating at ±10V or ±12V, this difference is not a practical limitation.

Q: Why are both substitute parts classified as Obsolete or Not For New Designs?

A: The NDP603AL, PSMN022-30PL,127, and STP40NF03L represent mature MOSFET technology from previous design generations. Manufacturers have transitioned to newer device families with improved performance characteristics. These parts remain available in inventory for maintenance and legacy system support. For new designs, consultation with component suppliers regarding current-generation alternatives is recommended, though these parts remain suitable for replacement and repair applications.

Q: Are there compliance or regulatory differences between the substitute parts?

A: The PSMN022-30PL,127 carries ROHS3 Compliant certification, while the NDP603AL does not specify RoHS compliance. The STP40NF03L also carries ROHS3 Compliant certification. Both substitutes maintain REACH Unaffected status identical to the NDP603AL. For applications requiring RoHS compliance, the PSMN022-30PL,127 or STP40NF03L are preferred selections.