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onsemi MJD3055T4
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- Part No.:
- MJD3055T4
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
MJD3055T4.pdf
- Description:
- TRANS NPN 60V 10A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:3,627
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Product details
Overview
MJD3055T4 from onsemi is an NPN silicon power transistor in DPAK (TO-252) package, rated for 60 VCEO, 10 AC, and 20 W at TC = 25 °C, designed for general-purpose amplification and low-speed switching in industrial power supplies and motor control circuits.
For engineers reviewing the MJD3055T4 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical ratings, thermal derating behavior, AEC-Q101 qualification status, and validated alternative transistors for automotive-grade power stage design.
Technical Context
The MJD3055T4 operates as a medium-power bipolar junction transistor with complementary PNP counterpart MJD2955. Its DC current gain (hFE) ranges from 20 to 100 at IC = 4 A and VCE = 4 V, and it achieves fT = 2 MHz under specified test conditions (IC = 500 mA, VCE = 10 V, f = 500 kHz).
Thermal performance is defined by RJC = 6.25 °C/W and RJA = 71.4 °C/W (on minimum recommended pad), with safe operating area limited by both thermal and second-breakdown constraints up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 60 V - Maximum collector-emitter voltage before breakdown under open-base condition; defines maximum supply rail compatibility. |
| IC | 10 A - Continuous collector current rating at TC = 25 °C; usable up to ~6.5 A at TC = 100 °C after derating. |
| PD @ TC = 25 °C | 20 W - Total power dissipation limit with heatsink contact; requires thermal interface design per RJC = 6.25 °C/W. |
| hFE (IC = 4 A) | 20–100 - Current gain range determines base drive requirements; supports direct TTL/CMOS drive only at lower currents. |
| VCE(sat) (IC = 10 A) | ≤ 1.1 V - Saturation voltage at full rated current; sets conduction loss and heatsink sizing in switching applications. |
| fT | 2 MHz - Transition frequency limits usable bandwidth to low-speed switching (<100 kHz) and audio-frequency amplification. |
Pinout & Package
DPAK-3 (Case 369C, Style 1) surface-mount package measuring 6.10 × 6.54 × 2.28 mm with 2.29 mm lead pitch. Pin 1 is Base, Pins 2 & 4 are Collector (internally tied), Pin 3 is Emitter.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control terminal for forward-biased B-E junction; requires current-limited drive to avoid exceeding IB = 6 A absolute max. |
| 2, 4 | Collector | High-current output node; electrically common; must be thermally connected to PCB copper pour or heatsink for 20 W operation. |
| 3 | Emitter | Reference terminal for biasing; connects to ground or low-side return path; carries full load current and influences stability in emitter-follower configurations. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood applications including engine control modules and body electronics requiring PPAP compliance. |
| Pb-free / RoHS compliant | Meets EU RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow profile; compatible with lead-free assembly processes. |
| UL 94 V-0 epoxy | Flame-retardant encapsulation enables use in safety-critical industrial equipment meeting IEC 62368-1 insulation requirements. |
| High hFE × fT product | Supports efficient low-frequency switching with reduced base drive losses compared to legacy MJE3055-class devices. |
Applications
| Industrial Power Supply | DC Motor Driver |
|---|---|
|
Use Scenario: Linear regulator pass element or series switch in 24 V/5 A industrial SMPS auxiliary supplies. IC Role / Device Role / Timing Role: NPN power switch controlling output voltage via base current modulation; operates in linear or saturation region depending on regulation mode. Use Value: Low VCE(sat) minimizes dropout and thermal load; 60 V rating accommodates 48 V input transients without clamping. |
Use Scenario: Low-side driver for brushed DC motors in HVAC actuators and factory automation systems. IC Role / Device Role / Timing Role: Single-ended switch sinking motor current to ground; driven by microcontroller GPIO or dedicated gate driver. Use Value: 10 A rating supports peak stall currents up to 8 A; AEC-Q101 qualification ensures reliability in vibration-prone environments. |
| Automotive Lighting Control | Linear Audio Amplifier |
|
Use Scenario: High-side or low-side current sink for LED headlamp dimming modules in passenger vehicles. IC Role / Device Role / Timing Role: Constant-current switch regulating LED string brightness via PWM or analog base bias. Use Value: Junction temperature range (−55 to +150 °C) supports operation inside sealed headlamp housings; HBM ESD rating ≥ 8 kV reduces field failure risk. |
Use Scenario: Output stage in Class-AB audio amplifiers for infotainment systems and cabin speakers. IC Role / Device Role / Timing Role: Complementary emitter-follower pair (with MJD2955) delivering low-distortion, high-current output swing. Use Value: hFE consistency across batch ensures matched gain in push-pull configuration; fT > 2 MHz preserves fidelity up to 20 kHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics BUW12A | Higher VCEO (100 V), lower hFE (10–40), TO-220 package | Preferred where higher voltage margin is needed but board space allows through-hole mounting | Select when system overvoltage exceeds 60 V or thermal mass of TO-220 improves reliability in unheatsinked designs |
| ON Semiconductor MJD3055G | Same die, DPAK package, but supplied in 75-unit rail vs. 2500-unit tape-and-reel; discontinued per datasheet Rev. 14 | Suitable for prototyping or low-volume builds where reel handling is unnecessary | Choose for evaluation or small-batch production; verify availability as MJD3055G is marked discontinued in official documentation |
Compared with BUW12A and MJD3055G, the MJD3055T4 offers optimized surface-mount manufacturability, AEC-Q101 validation, and tighter hFE distribution-making it preferred for high-volume automotive and industrial SMT lines requiring traceable, PPAP-capable components.
Availability
MJD3055T4 is available at Aetrix Electronics and suitable for industrial power supplies, automotive lighting control, and DC motor drivers requiring stable component supply with long-term lifecycle support.
Supply support for MJD3055T4 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 MJD3055T4 belongs to onsemi's complementary power transistor family engineered for robust, cost-effective switching and amplification in harsh-environment applications demanding AEC-Q101 compliance and Pb-free manufacturing.
FAQ
What is the maximum continuous collector current for MJD3055T4 at 100 °C case temperature?
The MJD3055T4 has a maximum continuous collector current of 10 A at TC = 25 °C, derating linearly at 0.16 W/°C above that temperature. At TC = 100 °C, its power dissipation limit drops to 8.5 W, supporting approximately 6.5 A under typical VCE(sat) conditions. Always consult Figure 1 (Power Derating) in the official datasheet for precise thermal boundary mapping.
Is MJD3055T4 pin-compatible with MJE3055?
The MJD3055T4 is electrically similar to the MJE3055 but not pin-compatible: MJE3055 uses TO-220 packaging with three discrete leads, while MJD3055T4 uses DPAK-3 with four terminals (Pins 2 & 4 internally joined as Collector). PCB layout and thermal pad design must differ significantly between the two packages.
Does MJD3055T4 meet automotive qualification standards?
Yes, the NJVMJD3055T4G* variant (identical to MJD3055T4 except for NJV prefix) is AEC-Q101 qualified and PPAP capable. The standard MJD3055T4G shares the same die and process, and onsemi explicitly states NJV-prefix parts are for automotive applications requiring unique site and control change requirements.
What is the safe operating area (SOA) limitation for MJD3055T4 in pulse applications?
The MJD3055T4 SOA is defined in Figure 9 of the datasheet, with second-breakdown limits valid for duty cycles ≤10% and TJ(pk) ≤ 150 °C. For 1 ms pulses, it supports up to ~6 A at 40 V; for dc operation, thermal limits govern at ~10 A only with adequate heatsinking and TC ≤ 25 °C.
Can MJD3055T4 be used in complementary pair configurations with MJD2955?
Yes, the MJD3055T4 (NPN) and MJD2955T4G (PNP) are designed as complementary pairs with matched voltage/current ratings, gain characteristics, and thermal profiles. They are routinely used together in Class-AB audio output stages and H-bridge motor drivers where symmetrical switching behavior is required.
MJD3055T4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 10 A
- Voltage - Collector Emitter Breakdown (Max):
- 60 V
- Vce Saturation (Max) @ Ib, Ic:
- 1.1V @ 400mA, 4A
- Current - Collector Cutoff (Max):
- 50µA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 20 @ 4A, 4V
- Power - Max:
- 20 W
- Frequency - Transition:
- 2MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DPAK
MJD3055T4 FAQ
1.How can I place an order for MJD3055T4 through Aetrix?
Please submit a Request for Quotation (RFQ) for MJD3055T4 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 MJD3055T4 reliable?
The price and inventory of MJD3055T4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MJD3055T4 is usually 5 days.
3.What payment methods are accepted for MJD3055T4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MJD3055T4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MJD3055T4?
MJD3055T4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MJD3055T4 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 MJD3055T4?
For technical support, including MJD3055T4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MJD3055T4 requirements.
6.How does Aetrix verify that MJD3055T4 is sourced from the original manufacturer or authorized distributors?
All MJD3055T4 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 MJD3055T4 meets industry standards.
7.What is the process for return or replacement of MJD3055T4?
All MJD3055T4 units undergo pre-shipment inspection (PSI). If there is an issue with MJD3055T4, 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 MJD3055T4 part is unused and in its original packaging.
Return procedure for MJD3055T4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MJD3055T4 Tags
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