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onsemi NJV4031NT3G
- Part No.:
- NJV4031NT3G
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
NJV4031NT3G.pdf
- Description:
- TRANS NPN 40V 3A SOT223
- Quantity:
- Payment:
- Shipping:
Inventory:997
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Product details
Overview
NJV4031NT3G from onsemi is an AEC-Q101 qualified NPN bipolar power transistor in SOT-223 package, rated for 40 VCEO, 3.0 AC continuous collector current, and 2.0 W total power dissipation at TA = 25°C on 1"² FR-4 pad - used in automotive load switching and industrial DC-DC converter output stages.
For engineers reviewing the NJV4031NT3G datasheet, pinout, applications, or equivalent options, key selection criteria include VCE(sat) ≤ 0.300 V at IC = 3.0 A / IB = 0.3 A, hFE ≥ 100 at IC = 3.0 A, and thermal resistance RθJA = 64°C/W (mounted on 1"² pad), critical for thermally constrained automotive modules.
Technical Context
This device operates as a medium-power NPN switch with fixed gain architecture and no integrated biasing or protection circuitry. Its safe operating area (SOA) is defined up to 10 ms pulse width, and it exhibits fT = 215 MHz at IC = 500 mA, VCE = 10 V, indicating suitability for moderate-frequency switching above audio range but below RF.
Thermal derating follows linear reduction from 2.0 W at 25°C ambient to zero at 125°C case temperature. The SOT-223 package uses pins 2 and 4 tied to the collector tab for enhanced thermal conduction, requiring PCB copper pour design per onsemi's layout guidelines for 64°C/W RθJA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 40 Vdc - maximum blocking voltage between collector and emitter with base open; defines upper rail limit in low-side switch applications. |
| IC (cont.) | 3.0 Adc - continuous collector current rating at TC = 25°C; determines max steady-state load drive capability. |
| VCE(sat) | 0.300 Vdc at IC = 3.0 A / IB = 0.3 A - low saturation voltage minimizes conduction loss and self-heating in high-current switching. |
| hFE | 100 min at IC = 3.0 A / VCE = 1.0 V - ensures sufficient DC gain for reliable base drive sizing in linear or saturated operation. |
| fT | 215 MHz - current-gain bandwidth product confirms usable switching speed up to ~10–20 MHz with proper drive and layout. |
| RθJA | 64°C/W (1"² pad) - thermal resistance value used to calculate junction temperature rise under given power dissipation and PCB layout. |
| ESD HBM | Class 3B - 8 kV human-body-model ESD rating supports robustness in automotive assembly and handling environments. |
Pinout & Package
SOT-223 (Case 318E, Style 1) package with exposed collector tab (pins 2 and 4 electrically connected to collector); requires solderable thermal pad on PCB for rated power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control input terminal; requires ≥0.3 A base current to saturate at 3.0 A collector load. |
| 2 | Collector | Main power output terminal; internally bonded to metal tab for thermal and electrical conduction. |
| 3 | Emitter | Power return path; common reference for base drive and load current return. |
| 4 | Collector | Second collector connection point; must be connected to same net as pin 2 for full thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS power stages. |
| Pb-free, Halogen-free/BFR-free | Complies with RoHS Directive 2011/65/EU and automotive ELV requirements without compromising thermal or electrical performance. |
| UL 94 V-0 epoxy | Flame-retardant molding compound enables use in safety-critical enclosures without additional fire barriers. |
| Low VCE(sat) at high IC | 0.300 V at 3.0 A reduces power loss to ≤0.9 W, easing thermal management in space-constrained modules. |
| High fT | 215 MHz enables stable operation in PWM frequencies up to 20 MHz with minimal phase lag in feedback paths. |
Applications
| Automotive Door Module | Industrial DC-DC Converter |
|---|---|
Use Scenario: Driving power window motor and lock actuators via microcontroller GPIO with discrete base drive. IC Role / Device Role / Timing Role: Low-side NPN switch controlling 12 V DC loads with peak currents up to 3 A. Use Value: VCE(sat) ≤ 0.300 V limits heat generation during extended actuation cycles, supporting ASIL-B functional safety compliance. |
Use Scenario: Synchronous rectifier or pre-regulator switch in isolated 24 V to 5 V flyback converter. IC Role / Device Role / Timing Role: Medium-current power switch operating at 100–500 kHz with forced conduction timing. Use Value: hFE ≥ 100 ensures predictable base drive sizing across temperature, reducing gate driver complexity vs. MOSFET alternatives. |
| LED Headlamp Driver | Motor Control Interface |
Use Scenario: Constant-current sink for high-brightness LED strings in adaptive front lighting systems (AFS). IC Role / Device Role / Timing Role: Linear or PWM-controlled current regulator with analog dimming capability. Use Value: RθJA = 64°C/W allows direct mounting on aluminum heatsink pads, enabling >2 W optical output without active cooling. |
Use Scenario: Directional control interface between MCU and brushed DC motor in HVAC blower assemblies. IC Role / Device Role / Timing Role: H-bridge half-bridge element providing bidirectional current flow with logic-level enable. Use Value: ESD HBM Class 3B (8 kV) withstands electrostatic discharge during automated assembly and field service, improving yield and reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MJD44H11T4G | Higher VCEO = 80 V, lower hFE = 50 min at IC = 3 A, same SOT-223 package. | Better suited for 48 V industrial systems; less suitable for 12 V automotive where gain margin matters. | Select when higher breakdown voltage is required and base drive capability permits lower hFE. |
| ZTX653STZ | Lower VCEO = 30 V, higher fT = 250 MHz, TO-92 package (no thermal pad). | Limited to low-power consumer applications; unsuitable for automotive thermal or reliability requirements. | Use only in non-automotive, low-current (<1 A), non-thermally constrained designs. |
Compared with MJD44H11T4G and ZTX653STZ, the NJV4031NT3G delivers optimal balance of AEC-Q101 qualification, 40 V rating, 3 A current capacity, and 64°C/W thermal performance in SOT-223 - making it the preferred choice for thermally demanding 12 V automotive power switching where reliability and manufacturability are critical.
Availability
NJV4031NT3G is available at Aetrix Electronics and suitable for automotive body control modules, industrial DC-DC converters, and LED lighting drivers requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant traceability.
Supply support for NJV4031NT3G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
onsemi is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NJV4031NT3G belongs to onsemi's bipolar power transistor family designed specifically for ruggedized, high-reliability automotive power switching - emphasizing AEC-Q101 qualification, thermal robustness, and manufacturable SOT-223 packaging.
FAQ
What is the maximum continuous collector current rating for NJV4031NT3G?
The NJV4031NT3G has a maximum continuous collector current (IC) rating of 3.0 A at TC = 25°C. This rating assumes proper PCB thermal management using a 1"² copper pad; derating applies above 25°C case temperature per Figure 1 in the datasheet. At TC = 100°C, the usable IC drops to approximately 1.25 A.
Is NJV4031NT3G suitable for automotive applications?
Yes, the NJV4031NT3G is AEC-Q101 qualified and PPAP capable, with NJV prefix indicating automotive-specific site and change control. It meets automotive temperature range (−55°C to +150°C), ESD (HBM Class 3B), and material compliance (Pb-free, halogen-free) requirements - making it appropriate for body electronics, lighting, and power distribution modules.
What is the typical VCE(sat) of NJV4031NT3G at full load?
The NJV4031NT3G exhibits VCE(sat) = 0.300 Vdc maximum at IC = 3.0 A and IB = 0.3 A, per the datasheet's ON CHARACTERISTICS table. This low saturation voltage ensures conduction losses remain below 0.9 W at full rated current, supporting efficient thermal design in compact layouts.
Does NJV4031NT3G have integrated ESD protection?
The NJV4031NT3G features built-in ESD protection rated to Human Body Model (HBM) Class 3B (≥8 kV) and Machine Model (MM) Class C (≥400 V), as specified in the Maximum Ratings table. These ratings are verified per AEC-Q101 test conditions and do not require external TVS devices for standard handling and board-level ESD immunity.
What package type does NJV4031NT3G use and how is thermal performance achieved?
The NJV4031NT3G uses the SOT-223 (Case 318E) package with pins 2 and 4 internally connected to the collector tab. Thermal performance relies on soldering the exposed collector pad to a ≥1"² copper area on FR-4 PCB, achieving RθJA = 64°C/W. Smaller pads increase thermal resistance to 155°C/W, limiting usable power.
NJV4031NT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 3 A
- Voltage - Collector Emitter Breakdown (Max):
- 40 V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 300mA, 3A
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 200 @ 1A, 1V
- Power - Max:
- 2 W
- Frequency - Transition:
- 215MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-223 (TO-261)
NJV4031NT3G FAQ
1.How can I place an order for NJV4031NT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for NJV4031NT3G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for NJV4031NT3G reliable?
The price and inventory of NJV4031NT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NJV4031NT3G is usually 5 days.
3.What payment methods are accepted for NJV4031NT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NJV4031NT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NJV4031NT3G?
NJV4031NT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NJV4031NT3G order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for NJV4031NT3G?
For technical support, including NJV4031NT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NJV4031NT3G requirements.
6.How does Aetrix verify that NJV4031NT3G is sourced from the original manufacturer or authorized distributors?
All NJV4031NT3G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that NJV4031NT3G meets industry standards.
7.What is the process for return or replacement of NJV4031NT3G?
All NJV4031NT3G units undergo pre-shipment inspection (PSI). If there is an issue with NJV4031NT3G, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The NJV4031NT3G part is unused and in its original packaging.
Return procedure for NJV4031NT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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