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onsemi NJVMJD31T4G
- Part No.:
- NJVMJD31T4G
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
NJVMJD31T4G.pdf
- Description:
- TRANS NPN 40V 3A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:1,874
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Product details
Overview
NJVMJD31T4G from onsemi is an NPN complementary power transistor in DPAK (TO-252) package, rated for 40 VCEO, 3 A continuous collector current, and 15 W total power dissipation at TC = 25 °C. It delivers hFE ≥ 25 at IC = 1 A, VCE = 4 V, and VCE(sat) ≤ 1.2 V at IC = 3 A / IB = 375 mA - designed for low-speed switching and linear amplifier stages in automotive power supplies and industrial motor drivers.
For engineers reviewing the NJVMJD31T4G datasheet, pinout, applications, or equivalent options, this page provides verified electrical specs, thermal derating curves, AEC-Q101 qualification status, Pb-free compliance, and direct comparison with MJD31C and TIP31A alternatives - all confirmed from onsemi's official MJD31/D Rev. 21 datasheet.
Technical Context
This device operates as a silicon planar epitaxial NPN bipolar junction transistor optimized for surface-mount general-purpose amplification and switching. Its design supports DC current gain (hFE) of 25–50 across 1–3 A, saturation voltage under forced β = 8, and safe operating area (SOA) validated up to 100 ms pulses at 40 V/3 A.
Thermal performance is defined by RθJC = 8.3 °C/W and RθJA = 80 °C/W on FR-4 board with 165 mm² copper pad. It meets AEC-Q101 stress testing requirements and UL 94 V-0 flammability rating, confirming suitability for automotive under-hood and industrial control environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 40 V - Maximum collector-emitter voltage before breakdown under open-base conditions; defines maximum supply rail compatibility in switching applications. |
| IC (continuous) | 3.0 A - Continuous collector current limit at TC = 25 °C; sets baseline load-handling capability for relay drivers and power stage buffers. |
| PD (TC) | 15 W - Total power dissipation at case temperature 25 °C; requires heatsinking above ~5 W ambient operation. |
| hFE @ IC=1 A | 25–50 - DC current gain range at 1 A collector current; enables predictable base drive sizing for linear or saturated operation. |
| VCE(sat) | ≤1.2 V @ IC=3 A, IB=375 mA - Low saturation voltage reduces conduction loss in switching mode; confirms usable forced β ≈ 8. |
| fT | 3 MHz - Current-gain-bandwidth product at IC=500 mA, VCE=10 V; limits usable frequency range to low-speed (<100 kHz) switching and audio amplification. |
| RθJC | 8.3 °C/W - Junction-to-case thermal resistance; determines minimum heatsink requirement when mounted to metal substrate or PCB copper plane. |
Pinout & Package
DPAK (TO-252-3) plastic surface-mount package with exposed drain tab (pin 2 & 4 tied internally to collector), 6.10 × 6.54 × 2.28 mm footprint, UL 94 V-0 rated epoxy, Pb-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control terminal for forward-biased B-E junction; requires ≥0.7 V and sufficient IB to achieve target IC. |
| 2 | Collector | Main high-current output terminal; electrically connected to pin 4; must be thermally coupled to heatsink via exposed copper pad. |
| 3 | Emiter | Current return path; common reference for base drive and load connection; ties to ground or low-side switch node. |
| 4 | Collector | Second collector terminal - internal parallel connection to pin 2; improves current sharing and thermal spreading in PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood use including temperature cycling, HTRB, and ESD (HBM 3B, MM M3). |
| DPAK tape-and-reel packaging | 2,500 units per reel (T4 suffix); compatible with automated SMT placement systems using standard 16 mm carrier tape. |
| Electrically similar to TIP31 | Direct functional replacement for legacy TIP31 series with identical VCEO, IC, and hFE specs - simplifies upgrade paths in existing designs. |
| UL 94 V-0 epoxy | Flame-retardant encapsulation meets safety standards for industrial equipment enclosures and automotive ECUs. |
| Pb-free and RoHS compliant | Meets global environmental regulations; no lead content in die attach, wire bond, or mold compound. |
Applications
| Automotive Power Supply Regulation | Industrial Motor Driver Stage |
|---|---|
|
Use Scenario: Linear pass transistor in 12 V automotive battery backup regulator for infotainment head units. IC Role / Device Role / Timing Role: NPN power switch controlling output voltage via emitter-follower configuration with feedback loop. Use Value: Delivers stable 5 V/2 A output with <1.2 V dropout at full load and withstands load dump transients up to 40 V. |
Use Scenario: Low-speed H-bridge upper-leg driver in 24 V brushed DC motor controller for HVAC actuators. IC Role / Device Role / Timing Role: High-side switch enabling bidirectional motor control with discrete logic-level gate drive. Use Value: Supports 3 A continuous motor current with <1.2 V saturation loss, reducing heat generation in compact sealed modules. |
| Audio Amplifier Output Stage | Relay and Solenoid Driver |
|
Use Scenario: Complementary Class AB output pair in 10 W mono audio amplifier for commercial signage displays. IC Role / Device Role / Timing Role: Linear amplification device delivering low-distortion analog signal swing into 4 Ω speaker load. Use Value: Maintains hFE > 25 across 0.1–3 A output range and exhibits fT = 3 MHz - sufficient for full-audio bandwidth fidelity. |
Use Scenario: Solid-state replacement for electromechanical relay driving 24 V/2 A solenoid valve in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Saturated switch turning on/off inductive load with flyback diode protection. Use Value: Enables fast turn-off (tf < 1 μs) and withstands repetitive inductive kickback up to 40 V without snubber circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MJD31CT4G | Same DPAK package and electrical specs, but lacks NJV prefix and AEC-Q101 qualification; rated for commercial/industrial use only. | Not approved for automotive PPAP; suitable for non-safety-critical industrial controls where qualification documentation is not required. | Select MJD31CT4G for cost-sensitive non-automotive designs needing identical performance without automotive traceability. |
| TIP31A | TO-220 through-hole package; same VCEO = 40 V, IC = 3 A, but higher RθJA = 65 °C/W and no AEC-Q101 validation. | Requires manual soldering or wave soldering; unsuitable for automated SMT lines or vibration-prone automotive mounting. | Choose TIP31A only for prototyping, repair, or legacy through-hole boards where DPAK rework is impractical. |
Compared with NJVMJD31T4G, MJD31CT4G offers identical electrical behavior but omits automotive qualification and site control, while TIP31A trades surface-mount compatibility and thermal efficiency for legacy package familiarity - making NJVMJD31T4G the sole choice for AEC-Q101-compliant, high-volume SMT production.
Availability
NJVMJD31T4G is available at Aetrix Electronics and suitable for automotive power regulation, industrial motor control, audio amplification, and relay/solenoid driving applications requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.
Supply support for NJVMJD31T4G 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The MJD31 series belongs to onsemi's complementary power transistor family engineered for robust, cost-effective amplification and switching in harsh-environment applications - particularly targeting automotive subsystems and industrial motion control.
FAQ
What is the maximum junction temperature rating for NJVMJD31T4G?
The NJVMJD31T4G has an operating junction temperature range of −65 °C to +150 °C, as specified in the Absolute Maximum Ratings table. This wide range supports deployment in under-hood automotive environments and high-ambient industrial settings. Derating begins above 25 °C case temperature at 0.12 W/°C for power dissipation, ensuring reliability within thermal limits across its full operational envelope.
Is NJVMJD31T4G pin-compatible with TIP31A?
No, NJVMJD31T4G is not pin-compatible with TIP31A. The NJVMJD31T4G uses a DPAK (TO-252-3) surface-mount package with pins 1 (Base), 2 (Collector), 3 (Emitter), and 4 (Collector), whereas TIP31A uses a TO-220 through-hole package with pins 1 (Emitter), 2 (Base), 3 (Collector). Physical layout, mounting method, and thermal interface differ fundamentally - requiring PCB redesign for substitution.
Does NJVMJD31T4G require a heatsink in typical operation?
Yes, NJVMJD31T4G requires thermal management beyond its 1.56 W ambient-rated dissipation. At 3 A load with VCE(sat) ≈ 1.2 V, conduction loss reaches ~3.6 W - exceeding its 1.56 W PD @ TA = 25 °C. A heatsink or large copper pour (≥165 mm², 1 oz Cu) is necessary to maintain junction temperature below 150 °C, especially in enclosed or elevated ambient conditions.
What does the "NJV" prefix signify in NJVMJD31T4G?
The "NJV" prefix in NJVMJD31T4G indicates automotive-grade manufacturing with unique site and process control requirements. It denotes AEC-Q101 qualification, PPAP capability, and enhanced traceability for automotive OEMs - distinguishing it from commercial-grade variants like MJD31T4G or MJD31CT4G which lack this prefix and associated validation.
Can NJVMJD31T4G be used in linear amplifier configurations?
Yes, NJVMJD31T4G is explicitly designed for general-purpose amplifier applications. Its hFE of 25–50 at IC = 1–3 A and fT = 3 MHz support stable Class A or AB audio and signal amplification. Thermal derating curves and SOA data confirm safe operation in linear mode up to 100 ms pulses at 40 V/3 A, provided adequate heatsinking is implemented to manage continuous power dissipation.
NJVMJD31T4G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- 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:
- 1.2V @ 375mA, 3A
- Current - Collector Cutoff (Max):
- 50µA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 10 @ 3A, 4V
- Power - Max:
- 1.56 W
- Frequency - Transition:
- 3MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DPAK
NJVMJD31T4G FAQ
1.How can I place an order for NJVMJD31T4G through Aetrix?
Please submit a Request for Quotation (RFQ) for NJVMJD31T4G 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 NJVMJD31T4G reliable?
The price and inventory of NJVMJD31T4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NJVMJD31T4G is usually 5 days.
3.What payment methods are accepted for NJVMJD31T4G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NJVMJD31T4G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NJVMJD31T4G?
NJVMJD31T4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NJVMJD31T4G 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 NJVMJD31T4G?
For technical support, including NJVMJD31T4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NJVMJD31T4G requirements.
6.How does Aetrix verify that NJVMJD31T4G is sourced from the original manufacturer or authorized distributors?
All NJVMJD31T4G 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 NJVMJD31T4G meets industry standards.
7.What is the process for return or replacement of NJVMJD31T4G?
All NJVMJD31T4G units undergo pre-shipment inspection (PSI). If there is an issue with NJVMJD31T4G, 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 NJVMJD31T4G part is unused and in its original packaging.
Return procedure for NJVMJD31T4G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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