NTP125N02RG Equivalent & Substitute Parts

Part Overview

The NTP125N02RG is an N-Channel MOSFET manufactured by onsemi, rated for 24V drain-to-source voltage with a continuous drain current of 15.9A at 25°C. The device is housed in a Through Hole TO-220-3 package and is designed for applications requiring moderate voltage and current switching capabilities. This part is classified as Obsolete, necessitating identification of equivalent substitute components for ongoing design support and procurement continuity.

Substiute Parts

NTP125N02RG

onsemiIn Stock: 18963NTP125N02RG Datasheet

Current PartRFQ

NTB5405NT4G

onsemiIn Stock: 21714NTB5405NT4G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the NTP125N02RG requires evaluation of electrical and mechanical compatibility based on the following critical parameters:

Electrical Compatibility Criteria:

• FET Type: N-Channel MOSFET technology
• Drain to Source Voltage (Vdss): Must equal or exceed 24V
• Continuous Drain Current (Id): Must meet or exceed 15.9A at rated temperature
• Gate Charge (Qg): Lower values indicate faster switching with reduced drive requirements
• Input Capacitance (Ciss): Affects gate drive circuit design
• Rds On: Lower on-resistance reduces conduction losses
• Operating Temperature Range: Must encompass -55°C to 150°C minimum

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole vs. Surface Mount affects PCB layout and assembly process
• Package / Case: Physical dimensions and pin configuration determine board compatibility

The NTB5405NT4G is identified as a substitute part. This device exceeds the electrical specifications of the NTP125N02RG in voltage rating (40V vs. 24V) and current capacity (116A vs. 15.9A). However, the NTB5405NT4G uses Surface Mount D2PAK packaging, which represents a mechanical incompatibility with the Through Hole TO-220 requirement of the original part. This substitution is valid only for applications where PCB redesign to accommodate surface mount technology is feasible.

Parameter Comparison

Engineering Selection Recommendations

Electrical Substitution Validity:

The NTB5405NT4G satisfies all electrical requirements for substitution of the NTP125N02RG. The substitute part provides superior voltage rating (40V vs. 24V), significantly higher current capacity (116A vs. 15.9A), and extended operating temperature range (-55°C to 175°C vs. -55°C to 150°C). Both devices are manufactured by onsemi and employ identical N-Channel MOSFET technology with matching maximum gate voltage (±20V) and moisture sensitivity classification (MSL 1).

Mechanical Compatibility Constraint:

The primary limitation for direct substitution is the packaging difference. The NTP125N02RG uses Through Hole TO-220-3 mounting, while the NTB5405NT4G uses Surface Mount D2PAK (TO-263-3) packaging. This difference requires PCB redesign and assembly process modification. Direct pin-for-pin replacement on existing through-hole PCBs is not possible without adapter solutions.

Regulatory and Compliance Status:

Both parts maintain identical REACH Unaffected status and ECCN classification (EAR99), ensuring no regulatory barriers to substitution from a compliance perspective. Both devices carry MSL 1 (Unlimited) moisture sensitivity, indicating no special handling requirements during storage or assembly.

Gate Drive Considerations:

The NTB5405NT4G exhibits higher gate charge (88 nC vs. 28 nC) and higher input capacitance (4000 pF vs. 3440 pF), requiring gate drive circuits with increased current capability and faster switching characteristics to maintain equivalent switching performance.

Frequently Asked Questions (FAQ)

Q: Can the NTB5405NT4G be used as a direct replacement for the NTP125N02RG on existing PCBs?

A: No. The NTP125N02RG uses Through Hole TO-220-3 packaging, while the NTB5405NT4G uses Surface Mount D2PAK packaging. Direct PCB replacement is not possible without redesign. Adapter solutions or PCB layout modifications are required.

Q: Are there electrical limitations when substituting the NTB5405NT4G for the NTP125N02RG?

A: No electrical limitations exist. The NTB5405NT4G exceeds all electrical specifications of the NTP125N02RG, including voltage rating, current capacity, and temperature range. The substitute part is electrically superior.

Q: What is the impact of higher gate charge in the NTB5405NT4G?

A: The NTB5405NT4G has gate charge of 88 nC compared to 28 nC in the NTP125N02RG. This requires gate drive circuits with higher current output and faster response times to achieve equivalent switching speeds. Existing gate drive circuits may require redesign.

Q: Do both parts have identical regulatory compliance?

A: Yes. Both the NTP125N02RG and NTB5405NT4G share identical REACH Unaffected status, ECCN classification (EAR99), and MSL 1 moisture sensitivity level. No regulatory barriers exist for substitution.

Q: Why is the NTP125N02RG classified as Obsolete?

A: The NTP125N02RG is marked as Obsolete by the manufacturer. Substitute parts must be identified for new designs or ongoing production support. The NTB5405NT4G is also Obsolete, indicating both devices are no longer in active production.

Q: What are the thermal performance differences between these parts?

A: The NTP125N02RG dissipates 113.6W (Tc) maximum, while the NTB5405NT4G dissipates 150W (Tc) maximum. The substitute part provides superior thermal performance. The NTB5405NT4G also supports higher operating temperatures (175°C vs. 150°C junction temperature).

Q: Are there any input capacitance differences that affect circuit design?

A: The NTB5405NT4G has input capacitance of 4000 pF at 32V, compared to 3440 pF at 20V for the NTP125N02RG. The higher capacitance in the substitute part may require adjustments to gate drive timing and circuit impedance matching.