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onsemi NJL0302DG
- Part No.:
- NJL0302DG
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-264-5
- Datasheet:
-
NJL0302DG.pdf
- Description:
- TRANS PNP 260V 15A TO-264
- Quantity:
- Payment:
- Shipping:
Inventory:213
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Product details
Overview
NJL0302DG from onsemi is a PNP bipolar power transistor with integrated thermal tracking diode, designed for bias stabilization in high-fidelity audio amplifier output stages. It delivers 15 A continuous collector current, 260 V collector-emitter voltage rating, 180 W power dissipation at TC = 25 °C, and features thermally matched base-emitter junctions to eliminate thermal lag during dynamic operation - used in home receivers and professional PA amplifiers.
For engineers reviewing the NJL0302DG datasheet, pinout, applications, or equivalent options, key selection criteria include safe operating area (SOA) compliance at high VCE/IC conditions, thermal resistance (RθJC = 0.694 °C/W), DC current gain stability across −25 °C to +100 °C, and Pb-free TO-264 package compatibility with high-power heatsink mounting.
Technical Context
The NJL0302DG integrates a PNP transistor die and a matched thermal-sensing diode in a single monolithic structure housed in a 5-lead TO-264 package. Its ThermalTrak architecture ensures instantaneous thermal coupling between the transistor junction and diode, enabling real-time bias compensation without external sensors or trimming circuits.
This device operates as a complementary pair with NJL0281DG (NPN), sharing identical maximum ratings (VCEO = 260 V, IC = 15 A, PD = 180 W), thermal resistance (RθJC = 0.694 °C/W), and SOA curves. It supports Class AB amplifier topologies where precise quiescent current control is critical to minimize crossover distortion and thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 260 Vdc - supports rail voltages up to ±130 V in push-pull amplifier designs without breakdown risk. |
| IC (continuous) | 15 Adc - enables high-current output stage operation in >100 W audio amplifiers. |
| PD @ TC = 25 °C | 180 W - allows direct mounting to large heatsinks with minimal derating in ambient-controlled enclosures. |
| RθJC | 0.694 °C/W - ensures efficient heat transfer from junction to case, critical for sustained high-power operation. |
| hFE (IC = 500 mA, VCE = 5 V) | 75–150 - provides stable current gain across production lots and temperature range for predictable bias design. |
| fT | 30 MHz - supports wideband audio signal fidelity up to 20 kHz with margin for harmonic content and transient response. |
| VCE(sat) @ IC = 5 A | ≤1.0 Vdc - minimizes conduction loss and self-heating during high-current saturation events. |
Pinout & Package
Package: TO-264 (Case 340AA), 5-lead, Pb-free, isolated metal tab with integrated thermal pad. Mounting hole (ØP) and notches (2×R) defined per mechanical drawing 98AON19871D.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control terminal for forward-biased PNP operation; connects to driver stage for Class AB bias network. |
| 2 | Emitter | High-current return path; electrically tied to heatsink via isolated metal tab in standard mounting. |
| 3 | Collector | Main power output node; connected to speaker load or output transformer primary winding. |
| 4 | Anode | Thermal sensing diode anode; used in emitter-follower bias servo loop for real-time VBE tracking. |
| 5 | Cathode | Thermal sensing diode cathode; referenced to emitter potential to enable ΔVBE-based temperature feedback. |
Key Features
| Feature | Design Value |
|---|---|
| Thermally matched bias diode | Monolithic integration ensures <±1 °C thermal tracking between transistor junction and diode, eliminating equilibrium delay in bias loops. |
| Instant thermal bias tracking | Enables bias current stabilization within microseconds of thermal transients - no manual trimmer potentiometers required. |
| High safe operating area (SOA) | Rated for 100% linear operation up to 100 V × 10 A (DC) and 260 V × 1.5 A (pulsed), supporting robust Class AB output stages. |
| Absolute thermal integrity | Guaranteed thermal coupling over full −65 °C to +150 °C junction range, validated by onsemi's ThermalTrak qualification test flow. |
| Pb-free TO-264 package | RoHS-compliant lead finish and UL 94 V-0 flammability rating support industrial and consumer safety certifications. |
Applications
| Home Audio Receivers | Professional PA Amplifiers |
|---|---|
|
Use Scenario: Dual-channel stereo receiver delivering 80–120 W per channel into 4–8 Ω loads with low THD+N across 20 Hz–20 kHz. IC Role / Device Role / Timing Role: PNP output transistor in complementary symmetry Class AB push-pull stage, paired with NJL0281DG. Use Value: Eliminates need for discrete thermal compensation diodes and manual bias adjustment, reducing BOM count and field calibration labor. |
Use Scenario: High-reliability 300 W+ public address amplifier deployed in stadiums and theater systems with extended duty cycles. IC Role / Device Role / Timing Role: Primary PNP output switch in high-current output stage, handling peak currents >20 A during bass transients. Use Value: Maintains stable quiescent current under thermal cycling, preventing thermal runaway and ensuring long-term reliability in unattended installations. |
| Studio Monitor Power Amplifiers | High-End Home Theater Amplifiers |
|
Use Scenario: Bi-amplified studio monitor with separate LF/HF channels requiring ultra-low noise and distortion below −105 dB. IC Role / Device Role / Timing Role: Low-noise PNP output device in discrete emitter-follower configuration with active bias servo loop. Use Value: Delivers consistent hFE and VBE characteristics across temperature, preserving linearity and minimizing intermodulation distortion. |
Use Scenario: 7.1-channel AV receiver with independent power supplies per channel and dynamic headroom optimization. IC Role / Device Role / Timing Role: Complementary PNP transistor in rail-switching output topology for improved efficiency and reduced heat generation. Use Value: Enables tighter thermal management due to RθJC = 0.694 °C/W, allowing smaller heatsinks without compromising SOA margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MJD32C | Lower VCEO (100 V), lower PD (30 W), TO-220 package, no integrated thermal diode. | Suitable only for low-voltage (<±50 V rail) consumer audio; requires external bias compensation circuitry. | Select when cost sensitivity outweighs thermal stability requirements and rail voltage remains ≤±50 V. |
| ST13009 | Higher VCEO (400 V), higher IC (12 A), TO-3P package, no thermal tracking; slower fT (~4 MHz). | Better for SMPS or motor drive; lacks monolithic thermal matching needed for precision audio bias control. | Choose for high-voltage switching applications where audio-grade thermal tracking is unnecessary. |
Compared with MJD32C and ST13009, the NJL0302DG uniquely combines high-voltage capability (260 V), high-power handling (180 W), and monolithic thermal tracking - making it irreplaceable in high-fidelity audio output stages requiring zero-bias-drift operation.
Availability
NJL0302DG is available at Aetrix Electronics and suitable for home audio receivers, professional PA amplifiers, and studio monitor power amplifiers requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for NJL0302DG 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 management, analog, sensor, and connectivity solutions for automotive, industrial, and consumer markets.
The NJL0302DG belongs to onsemi's ThermalTrak family - engineered specifically for high-end audio amplifier bias stabilization, where thermal drift elimination and SOA robustness are non-negotiable design requirements.
FAQ
What is the function of pins 4 and 5 on the NJL0302DG?
Pins 4 (Anode) and 5 (Cathode) form an integrated thermal-sensing diode monolithically matched to the PNP transistor junction. This diode provides real-time VBE tracking for bias servo loops, enabling automatic quiescent current stabilization without external components. The NJL0302DG relies on this dual-die structure to achieve its core ThermalTrak functionality.
Is the NJL0302DG still in production?
While the NJL0302DG datasheet revision 3 (February 2026) notes NJL0302D as discontinued, the NJL0302DG variant remains orderable through authorized distributors and Aetrix Electronics with verified inventory. Its Pb-free marking (G suffix) confirms active manufacturing compliance with current RoHS standards.
How does the NJL0302DG differ from standard PNP power transistors like the MJE15034?
Unlike the MJE15034 - a conventional PNP transistor without thermal sensing - the NJL0302DG integrates a matched diode in the same package for instantaneous thermal feedback. This eliminates thermal equilibrium lag and manual bias adjustment, directly addressing reliability and sound quality issues in Class AB amplifiers. The NJL0302DG is purpose-built for this role.
What is the safe operating area (SOA) limit for the NJL0302DG at 100 °C case temperature?
At TC = 100 °C, the NJL0302DG's SOA is derated to approximately 90 W (per Figure 1), with maximum allowable collector current dropping to ~6 A at VCE = 100 V. This reflects its 1.43 W/°C derating coefficient applied to the 180 W rating at 25 °C. Designers must reference Figure 2 in the official datasheet for pulse and DC SOA boundaries.
Can the NJL0302DG be used without its thermal diode terminals?
Yes - pins 4 and 5 may be left unconnected if the design uses fixed bias or alternative thermal compensation. However, doing so forfeits the NJL0302DG's defining ThermalTrak advantage: automatic, drift-free bias control. Leaving them open does not impair basic transistor operation, but fully leveraging the NJL0302DG requires using all five terminals as specified.
NJL0302DG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-264-5
- Packaging:
- Tube
- Product Status:
- Active
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 15 A
- Voltage - Collector Emitter Breakdown (Max):
- 260 V
- Vce Saturation (Max) @ Ib, Ic:
- 1V @ 500mA, 5A
- Current - Collector Cutoff (Max):
- 10µA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 75 @ 3A, 5V
- Power - Max:
- 180 W
- Frequency - Transition:
- 30MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-264
NJL0302DG FAQ
1.How can I place an order for NJL0302DG through Aetrix?
Please submit a Request for Quotation (RFQ) for NJL0302DG 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 NJL0302DG reliable?
The price and inventory of NJL0302DG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NJL0302DG is usually 5 days.
3.What payment methods are accepted for NJL0302DG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NJL0302DG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NJL0302DG?
NJL0302DG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NJL0302DG 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 NJL0302DG?
For technical support, including NJL0302DG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NJL0302DG requirements.
6.How does Aetrix verify that NJL0302DG is sourced from the original manufacturer or authorized distributors?
All NJL0302DG 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 NJL0302DG meets industry standards.
7.What is the process for return or replacement of NJL0302DG?
All NJL0302DG units undergo pre-shipment inspection (PSI). If there is an issue with NJL0302DG, 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 NJL0302DG part is unused and in its original packaging.
Return procedure for NJL0302DG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NJL0302DG Tags
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