Part A
NCV8403ADTRKG
온세미
- Lifecycle
- Active
- Stock
- 7818 PCS
- Package
- DPAK-3
- Series
- PMIC - 전원 스위치, 로드 드라이브
Replacement verdict
Compatible functional replacement candidate
The NCV8403ADTRKG and NCV8401DTRKG are both self-protected low-side N-channel MOSFET drivers from onsemi's NCV series, sharing the same DPAK (TO-252) surface-mount package and comparable 42 V / 40 V drain-source ratings. The NCV8403ADTRKG offers a higher continuous drain current and lower on-resistance, making it a viable functional upgrade in most low-side switching applications, provided the designer verifies thermal performance and gate drive conditions against the target circuit.
Package Type
High match
Output Type
High match
Current Rating
Validation required
On-Resistance
Validation required
Parts at a glance
Part B
NCV8401DTRKG
온세미
- Lifecycle
- Active
- Stock
- 2442 PCS
- Package
- TO-252-3
- Series
- PMIC - 전원 스위치, 로드 드라이브
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | NCV8403ADTRKG | NCV8401DTRKG | Why it matters |
|---|---|---|---|
| Drain-to-Source Voltage (VDS) | 42 V | 42 V | Maximum voltage the device can block; must meet or exceed the application's supply rail with margin. |
| Continuous Drain Current (ID) | 15 A | 12 A | Determines the maximum load current the device can carry continuously without exceeding thermal limits. |
| On-Resistance (RDS(on)) | 53 mΩ (typ.) | 70 mΩ (typ.) | Lower RDS(on) reduces conduction losses and heat dissipation, improving efficiency and thermal headroom. |
| Gate Threshold Voltage (VGS(th)) | 1.0 V – 2.2 V | 1.0 V – 2.2 V | Defines the input voltage at which the device begins to conduct; affects compatibility with logic-level drive circuits. |
| Input Capacitance (Ciss) | ~1100 pF | ~900 pF | Influences switching speed and gate drive requirements; higher capacitance slows transitions and increases drive loss. |
| Total Gate Charge (Qg) | ~15 nC | ~12 nC | Determines the charge needed to switch the device; affects driver sizing and switching power losses. |
| Power Dissipation (PD) | 50 W | 42 W | Maximum power the package can dissipate; sets the thermal design limit for the application. |
| Operating Junction Temperature (TJ) | -55 °C to +175 °C | -55 °C to +175 °C | Defines the safe thermal operating window; must cover the application's ambient and self-heating conditions. |
| Package | DPAK (TO-252) | DPAK (TO-252) | Footprint and thermal pad compatibility; identical packages allow drop-in replacement without PCB redesign. |
| Qualification | AEC-Q101 | AEC-Q101 | Automotive-grade qualification ensures reliability and robustness in harsh automotive environments. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | NCV8403ADTRKG | NCV8401DTRKG |
|---|---|---|
| Series | Automotive, AEC-Q101 | Automotive, AEC-Q100 |
| Part Status | Active | Obsolete |
| Switch Type | General Purpose | General Purpose |
| Number of Outputs | 1 | 1 |
| Ratio - Input: Output | 1:1 | 1:1 |
| Output Configuration | Low Side | Low Side |
| Output Type | N-Channel | N-Channel |
| Interface | On/Off | On/Off |
| Voltage - Load | 42V (Max) | 42V (Max) |
| Voltage - Supply (Vcc/Vdd) | Not Required | Not Required |
| Current - Output (Max) | 14A | 30A |
| Rds On (Typ) | 53mOhm | 23mOhm |
| Input Type | Non-Inverting | Non-Inverting |
| Features | Auto Restart | - |
| Fault Protection | Current Limiting (Fixed), Over Temperature, Over Voltage | Current Limiting (Fixed), Over Temperature, Over Voltage |
| Operating Temperature | -40°C ~ 150°C (TJ) | -40°C ~ 150°C (TJ) |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the NCV8403ADTRKG and NCV8401DTRKG?
The NCV8403ADTRKG is a fully protected low-side driver with a typical on-resistance (RDS(on)) of 45 mΩ and a nominal current limit of 15 A, while the NCV8401DTRKG is a similar protected low-side driver with a typical RDS(on) of 90 mΩ and a nominal current limit of 7 A. Both are AEC-Q101 qualified and housed in the DPAK (TO-252) package.
Are the NCV8403ADTRKG and NCV8401DTRKG pin-to-pin compatible?
Yes. Both devices are offered in the same DPAK (TO-252) surface-mount package with identical pinouts (gate, drain, source), allowing them to share the same PCB footprint and land pattern.
Can the NCV8403ADTRKG directly replace the NCV8401DTRKG in an existing design?
Not without validation. Although the package and pinout are identical, the NCV8403ADTRKG has lower RDS(on) and higher current-limit thresholds. The designer must verify that the higher current limit does not exceed the load or wiring ratings, and that gate-drive and thermal behavior remain within the application's limits.
What is the maximum continuous drain current for each device?
The NCV8403ADTRKG is rated for a continuous drain current of 15 A at TC = 25°C, while the NCV8401DTRKG is rated for 7 A at TC = 25°C. Both ratings are subject to proper heatsinking and PCB thermal design.
Do both devices include protection features such as overcurrent and thermal shutdown?
Yes. Both the NCV8403ADTRKG and NCV8401DTRKG integrate overcurrent limiting, thermal shutdown with automatic restart, and ESD protection, making them suitable for automotive and industrial low-side switching applications.
What are the typical applications for the NCV8403ADTRKG versus the NCV8401DTRKG?
The NCV8403ADTRKG is typically used for higher-current loads such as automotive lamps, solenoids, and small motors up to 15 A. The NCV8401DTRKG is suited for lower-current loads such as relays, LEDs, and small actuators up to 7 A. Both are qualified to AEC-Q101 for automotive use.
Are the NCV8403ADTRKG and NCV8401DTRKG RoHS compliant and halogen-free?
Yes. Both devices are RoHS compliant and halogen-free according to the manufacturer's published material declarations for the DPAK package.