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onsemi MJE3055TG
- Part No.:
- MJE3055TG
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-220-3
- Datasheet:
-
MJE3055TG.pdf
- Description:
- TRANS NPN 60V 10A TO-220
- Quantity:
- Payment:
- Shipping:
Inventory:3,061
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Product details
Overview
MJE3055TG from onsemi is an NPN silicon power transistor in TO-220 package, rated for 60 VCEO, 10 AC, and 75 W dissipation at TC = 25 °C, with DC current gain (hFE) of 20–100 at IC = 4 A, used in linear amplifiers, switching regulators, and motor drive output stages.
For engineers reviewing the MJE3055TG datasheet, pinout, applications, or equivalent options, key selection criteria include safe operating area (SOA) compliance at elevated case temperatures, VCE(sat) ≤ 1.1 V at IC/IB = 10, thermal resistance RθJC = 1.67 °C/W, and Pb-free TO-220 mechanical compatibility.
Technical Context
The MJE3055TG operates as a medium-power NPN bipolar junction transistor optimized for linear and switching operation up to 2 MHz (fT = 2.0 MHz). It features complementary pairing with MJE2955TG (PNP), enabling push-pull amplifier and H-bridge configurations.
Its SOA is defined by three limits-bonding wire, second breakdown, and thermal-with derating to 0.6 W/°C above 25 °C and maximum junction temperature of +150 °C. VBE(on) is specified at 1.8 V max under IC = 4 A, supporting robust base drive design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 60 V - Maximum collector-emitter voltage before avalanche breakdown under open-base conditions; defines rail voltage limit in switching applications. |
| IC | 10 A - Continuous collector current rating at TC = 25 °C; usable up to ~7 A at TC = 100 °C with derating. |
| PD | 75 W - Total device dissipation at TC = 25 °C; requires heatsink for sustained >15 W operation. |
| hFE | 20–100 - DC current gain range at IC = 4 A, VCE = 4 V; enables predictable base drive sizing in Class AB amplifiers. |
| VCE(sat) | ≤1.1 V - Saturation voltage at IC = 4 A, IB = 0.4 A; determines conduction loss and thermal load in switch-mode use. |
| fT | 2.0 MHz - Current-gain-bandwidth product at IC = 500 mA, VCE = 10 V; supports audio-frequency amplification and low-speed PWM switching. |
Pinout & Package
Package: TO-220 (Case 221A-09, Style 1), 4-pin variant with Collector pins 2 and 4 electrically common, Base on pin 1, Emitter on pin 3. Mounting tab is Collector-connected and electrically isolated via insulating washer when required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control terminal; requires ≥0.4 A base current to saturate at IC = 4 A per datasheet test condition. |
| 2 & 4 | Collector | High-current output node; dual pins reduce current density and improve thermal path to heatsink via mounting tab. |
| 3 | Emitter | Reference terminal for bias network; tied to ground or negative rail in common-emitter configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free & RoHS Compliant | Meets EU Directive 2011/65/EU; eliminates lead-based solder compatibility concerns in modern assembly lines. |
| High Safe Operating Area (SOA) | Supports 10 A at 5 V (50 W) in DC mode and 7 A at 10 V (70 W) for 1 ms pulses-enables robust overload tolerance in motor control. |
| Low Thermal Resistance | RθJC = 1.67 °C/W allows efficient heat transfer to heatsink; enables compact thermal design vs. higher-Rθ alternatives. |
| Complementary Pairing | Matched with MJE2955TG (PNP) for symmetrical push-pull output stages without gain or VBE mismatch penalties. |
Applications
| Audio Power Amplifier | DC Motor Driver |
|---|---|
|
Use Scenario: Output stage in 20–50 W Class AB audio amplifiers driving 4–8 Ω speakers. IC Role / Device Role / Timing Role: NPN power switch in complementary emitter-follower configuration delivering linear current gain and low distortion. Use Value: VCE(sat) ≤ 1.1 V minimizes quiescent heating; hFE stability across −55 to +150 °C ensures consistent bias point over temperature. |
Use Scenario: H-bridge half-bridge leg controlling bidirectional 12–24 V DC motors in industrial actuators. IC Role / Device Role / Timing Role: High-side or low-side switching element handling peak currents up to 10 A during stall conditions. Use Value: SOA curve validated to 100 °C case temperature enables reliable operation without forced air cooling in enclosed enclosures. |
| Linear Voltage Regulator | Switching Power Supply |
|
Use Scenario: Pass transistor in adjustable 3–30 V, 5 A linear regulators for lab bench supplies. IC Role / Device Role / Timing Role: Series pass element dissipating excess voltage as heat while maintaining precise output regulation. Use Value: 75 W PD rating and 1.67 °C/W RθJC allow stable 5 A operation at ≤10 V dropout with moderate heatsinking. |
Use Scenario: Main switch in 50–100 kHz flyback or forward converters for AC/DC adapters and embedded power modules. IC Role / Device Role / Timing Role: Hard-switched NPN transistor turning on/off at fixed frequency with base-driven control. Use Value: fT = 2.0 MHz exceeds typical SMPS switching frequencies, ensuring adequate gain margin for stable base drive loop response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TIP3055 | Same TO-220 package, but VCEO = 100 V, IC = 15 A, PD = 90 W; hFE min = 20 at IC = 4 A, VCE = 4 V. | Higher voltage/current headroom; suitable where 60 V margin is insufficient or surge currents exceed 10 A. | Select TIP3055 when designing for 80–100 V rails or requiring extended SOA beyond MJE3055TG's 60 V/10 A envelope. |
| 2N3055 | Legacy TO-3 metal can; VCEO = 60 V, IC = 15 A, PD = 115 W; hFE min = 20 at IC = 4 A, but RθJC ≈ 1.5 °C/W and no Pb-free option. | Requires larger heatsink footprint and through-hole assembly; not RoHS-compliant in standard versions. | Choose 2N3055 only for legacy repair or high-reliability mil/aero designs where TO-3 mechanical ruggedness is mandated. |
Compared with TIP3055 and 2N3055, the MJE3055TG offers optimal balance of Pb-free compliance, TO-220 manufacturability, and verified SOA performance at 60 V/10 A-making it preferred for new industrial and consumer power designs where cost, size, and regulatory alignment matter.
Availability
MJE3055TG is available at Aetrix Electronics and suitable for audio amplifiers, DC motor drivers, and linear voltage regulators requiring stable component supply, RoHS compliance, and TO-220 thermal performance.
Supply support for MJE3055TG 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 MJE3055TG belongs to onsemi's complementary plastic power transistor family, designed specifically for cost-sensitive, medium-power linear and switching applications where reliability, thermal performance, and regulatory compliance are critical.
FAQ
What is the maximum continuous collector current for MJE3055TG at 100 °C case temperature?
The MJE3055TG is rated for 10 A at TC = 25 °C, with linear derating at 0.6 W/°C. At TC = 100 °C, its power dissipation limit drops to 30 W. Using the SOA curve (Figure 1), the maximum continuous IC at VCE = 5 V is approximately 6 A. Therefore, MJE3055TG supports ~6 A continuous at 100 °C case temperature under thermally limited conditions.
Is MJE3055TG pin-compatible with older MJE3055T variants?
Yes, MJE3055TG uses identical TO-220 package (Case 221A-09, Style 1) and pinout as MJE3055T: Pin 1 = Base, Pins 2 & 4 = Collector, Pin 3 = Emitter. The "G" suffix denotes Pb-free construction, with no electrical or mechanical changes-making MJE3055TG a direct drop-in replacement for legacy MJE3055T in existing PCB layouts.
Does MJE3055TG require a heatsink in 5 A switching applications?
Yes, MJE3055TG requires a heatsink in 5 A switching applications. At IC = 5 A and VCE(sat) ≈ 1.3 V (typical at elevated temperature), conduction loss exceeds 6.5 W. With RθJC = 1.67 °C/W and ambient >40 °C, junction temperature would exceed 150 °C without heatsinking. A 2–3 °C/W heatsink is recommended for reliable 5 A operation.
What is the safe operating area (SOA) limitation for MJE3055TG at 1 ms pulse width?
Per Figure 1 in the onsemi datasheet, the MJE3055TG SOA for 1 ms pulses is bounded by second breakdown. At VCE = 30 V, the maximum allowable IC is ~8 A; at VCE = 50 V, it drops to ~4.5 A. This defines absolute limits for short-duration overload events-exceeding these values risks localized thermal runaway even if average power appears acceptable.
Can MJE3055TG be used in parallel with another MJE3055TG for higher current?
Parallel operation of MJE3055TG devices is not recommended without individual emitter resistors. Due to hFE variation (20–100) and VBE(on) spread, current sharing will be uneven-risking thermal runaway in one device. If paralleling is essential, use 0.1–0.22 Ω emitter resistors per MJE3055TG and ensure matched heatsinking and layout symmetry.
MJE3055TG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 10 A
- Voltage - Collector Emitter Breakdown (Max):
- 60 V
- Vce Saturation (Max) @ Ib, Ic:
- 8V @ 3.3A, 10A
- Current - Collector Cutoff (Max):
- 700µA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 20 @ 4A, 4V
- Power - Max:
- 75 W
- Frequency - Transition:
- 2MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
MJE3055TG FAQ
1.How can I place an order for MJE3055TG through Aetrix?
Please submit a Request for Quotation (RFQ) for MJE3055TG 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 MJE3055TG reliable?
The price and inventory of MJE3055TG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MJE3055TG is usually 5 days.
3.What payment methods are accepted for MJE3055TG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MJE3055TG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MJE3055TG?
MJE3055TG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MJE3055TG 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 MJE3055TG?
For technical support, including MJE3055TG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MJE3055TG requirements.
6.How does Aetrix verify that MJE3055TG is sourced from the original manufacturer or authorized distributors?
All MJE3055TG 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 MJE3055TG meets industry standards.
7.What is the process for return or replacement of MJE3055TG?
All MJE3055TG units undergo pre-shipment inspection (PSI). If there is an issue with MJE3055TG, 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 MJE3055TG part is unused and in its original packaging.
Return procedure for MJE3055TG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MJE3055TG Tags
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MMBT3906LT1G
onsemi
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MMBT3904-7-F
Diodes Incorporated
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MMBT3904LT1G
onsemi
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MMBT3906-7-F
Diodes Incorporated
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MMBT3904-TP
Micro Commercial Co
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MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
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MMBT2222A-TP
Micro Commercial Co
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MMBTA06LT1G
onsemi
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MMBT2222ALT1G
onsemi
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