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onsemi MJE270TG
- Part No.:
- MJE270TG
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-225AA, TO-126-3
- Datasheet:
-
MJE270TG.pdf
- Description:
- TRANS NPN DARL 100V 2A TO-126
- Quantity:
- Payment:
- Shipping:
Inventory:791
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Product details
Overview
MJE270TG from onsemi is an NPN complementary silicon power Darlington transistor in TO-225 package, rated for 100 VCEO(sus), 2.0 A continuous collector current, and 15 W total power dissipation at TC = 25°C; it delivers hFE ≥ 1500 at IC = 120 mA and VCE = 10 V, and is used in linear power amplifiers and relay drivers requiring high DC gain and robust SOA.
For engineers reviewing the MJE270TG datasheet, pinout, applications, or equivalent options, key selection considerations include its 100 V sustaining voltage, second-breakdown current of 375 mA at 40 V/1 s, Pb-free RoHS-compliant TO-225 package, and suitability for medium-power switching and analog amplification where thermal management and safe operating area are critical.
Technical Context
The MJE270TG is a monolithic NPN Darlington pair with integrated base-emitter resistor network enabling high DC current gain (hFE ≥ 1500) and reduced drive requirements. Its rugged safe operating area supports non-repetitive pulse currents up to 375 mA at 40 V for 1 second.
It operates across −65°C to +150°C junction temperature range, features VCEO(sus) ≥ 100 Vdc, VCE(sat) ≤ 3.0 V at IC = 120 mA/IB = 1.2 mA, and exhibits fT ≥ 6.0 MHz under standard test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO(sus) | 100 Vdc minimum - ensures reliable blocking capability in 80–100 V rail applications without breakdown. |
| IC (continuous) | 2.0 Adc - supports medium-power load switching and linear amplifier output stages up to ~15 W dissipation. |
| hFE | ≥1500 at IC = 120 mA - enables low-base-drive designs, reducing driver stage complexity and power loss. |
| SOA (t = 1 s) | 375 mA @ 40 V - defines maximum single-pulse energy handling before second breakdown occurs. |
| RθJC | 8.33°C/W - allows direct heatsink mounting to sustain full 15 W power at case temperatures ≤ 25°C. |
| fT | ≥6.0 MHz - supports audio-frequency amplification and moderate-speed switching up to ~100 kHz. |
Pinout & Package
Package: TO-225 (Case 77-09, Style 3), Pb-free, with metal tab electrically connected to collector (pins 2 and 4). Mounting surface is thermally active and must be isolated if collector is not at chassis ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Base | Control input; requires current-limited drive due to Darlington configuration (VBE(on) ≤ 2.0 V). |
| Pins 2 & 4 | Collector | Main power output node; internally tied and connected to metal tab - must be electrically isolated from heatsink unless referenced to system ground. |
| Pin 3 | Emitter | Power return path; common emitter connection enables standard NPN switch/amplifier topology. |
Key Features
| Feature | Design Value |
|---|---|
| High Safe Operating Area | Supports 375 mA pulsed current at 40 V for 1 s - enables robust overload tolerance in motor start-up and solenoid drive. |
| High DC Current Gain | hFE ≥ 1500 minimizes required base drive current - reduces driver transistor size and heat generation. |
| 100 V Sustaining Voltage | VCEO(sus) ≥ 100 Vdc - suitable for 80 V industrial rails and flyback snubber circuits without derating. |
| Pb-Free & RoHS Compliant | Meets EU Directive 2011/65/EU - eliminates lead content while maintaining thermal and electrical performance. |
Applications
| Audio Power Amplifiers | DC Motor Drivers |
|---|---|
Use Scenario: Medium-power Class AB audio output stage delivering 5–15 W into 4–8 Ω loads. IC Role / Device Role / Timing Role: NPN Darlington output transistor providing high-current, low-distortion amplification with minimal drive requirements. Use Value: High hFE ≥ 1500 reduces need for pre-driver gain stages, simplifying PCB layout and improving thermal stability. | Use Scenario: Unidirectional 24–48 V DC motor control in industrial actuators and HVAC dampers. IC Role / Device Role / Timing Role: Switching element in emitter-follower or common-emitter configuration driving brushed DC motors up to 2 A continuous. Use Value: 100 VCEO(sus) accommodates back-EMF spikes during commutation without clamping circuitry. |
| Relay & Solenoid Drivers | Linear Regulator Pass Elements |
Use Scenario: Driving 12–24 V, 1–2 A electromagnetic relays and fuel injectors in automotive body control modules. IC Role / Device Role / Timing Role: High-gain saturated switch controlling coil current with fast turn-on/turn-off enabled by low VCE(sat) ≤ 3.0 V. Use Value: Second-breakdown rating of 375 mA @ 40 V ensures reliability during inductive turn-off transients. | Use Scenario: Series pass element in adjustable 3–30 V, 1–1.5 A linear regulators for test equipment and analog instrumentation. IC Role / Device Role / Timing Role: Power transistor regulating output voltage via feedback-controlled base current in series-pass topology. Use Value: RθJC = 8.33°C/W enables stable operation at full load with modest heatsinking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN Darlington power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MJE270G | Same die, identical specs, but discontinued per onsemi - MJE270TG is the Pb-free variant with identical marking and packaging. | No functional difference; both intended for same linear/switching roles in TO-225. | Select MJE270TG when Pb-free compliance is mandatory; verify availability against MJE270G legacy stock. |
| TIP122 | Lower VCEO(sus) = 100 V (same), but hFE = 1000 min (vs. 1500), RθJC = 5°C/W (better), and SOA limited to 250 mA @ 40 V. | Suitable for lower-gain, higher-thermal-conductivity designs; less tolerant of short overloads than MJE270TG. | Choose TIP122 only if board-level thermal design prioritizes junction-to-case resistance over SOA margin. |
Compared with MJE270G, the MJE270TG offers identical electrical performance with certified Pb-free construction; versus TIP122, it provides superior DC gain and second-breakdown immunity at the cost of slightly higher thermal resistance - making it preferable for high-reliability linear amplification and inductive load switching.
Availability
MJE270TG is available at Aetrix Electronics and suitable for audio power amplifiers, DC motor drivers, relay/solenoid drivers, and linear regulator pass elements requiring stable component supply and long-term industrial support.
Supply support for MJE270TG 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, cloud, and consumer markets.
The MJE270TG belongs to onsemi's complementary silicon power Darlington transistor family, designed specifically for medium-power linear amplification and switching applications demanding high DC gain, wide SOA, and rugged 100 V operation.
FAQ
What is the maximum continuous collector current rating for the MJE270TG?
The MJE270TG is rated for 2.0 A continuous collector current (IC) at TC = 25°C. Derating is required above this temperature - 0.12 W/°C - and actual usable current depends on heatsinking and ambient conditions. The device also supports 4.0 A peak collector current (ICM) for short-duration pulses.
Is the MJE270TG pin-compatible with the MJE270G?
Yes, the MJE270TG is pin-compatible with the MJE270G - both use identical TO-225 (Case 77-09, Style 3) packaging with base on pin 1, collector on pins 2 and 4, and emitter on pin 3. The MJE270TG is the Pb-free version of the MJE270G, with no electrical or mechanical differences beyond RoHS compliance.
What does "DISCONTINUED" mean for the MJE270TG in onsemi's ordering information?
"DISCONTINUED" indicates that onsemi no longer manufactures the MJE270TG for new designs. However, Aetrix Electronics maintains active inventory and supply chain support for legacy production and repair programs. Customers should consult Aetrix for current stock status and long-term availability planning for the MJE270TG.
Does the MJE270TG require a heatsink in typical applications?
Yes - the MJE270TG dissipates up to 15 W at TC = 25°C, and its RθJC = 8.33°C/W means even modest power levels generate significant junction temperature rise. A properly sized heatsink with thermal interface material is required for continuous operation above ~1–2 W; the metal tab (collector) must be electrically isolated unless referenced to system ground.
What is the safe operating area (SOA) limitation of the MJE270TG at 40 V?
At VCE = 40 V, the MJE270TG's non-repetitive second-breakdown SOA limit is 375 mA for 1.0 second (IS/B). This defines the maximum energy pulse the device can withstand without destructive failure. Exceeding this boundary risks thermal runaway, even if average power remains within ratings.
MJE270TG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-225AA, TO-126-3
- Packaging:
- Tube
- Product Status:
- Active
- Transistor Type:
- NPN - Darlington
- Current - Collector (Ic) (Max):
- 2 A
- Voltage - Collector Emitter Breakdown (Max):
- 100 V
- Vce Saturation (Max) @ Ib, Ic:
- 3V @ 1.2mA, 120mA
- Current - Collector Cutoff (Max):
- 1mA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 1500 @ 120mA, 10V
- Power - Max:
- 1.5 W
- Frequency - Transition:
- 6MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-126
MJE270TG FAQ
1.How can I place an order for MJE270TG through Aetrix?
Please submit a Request for Quotation (RFQ) for MJE270TG 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 MJE270TG reliable?
The price and inventory of MJE270TG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MJE270TG is usually 5 days.
3.What payment methods are accepted for MJE270TG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MJE270TG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MJE270TG?
MJE270TG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MJE270TG 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 MJE270TG?
For technical support, including MJE270TG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MJE270TG requirements.
6.How does Aetrix verify that MJE270TG is sourced from the original manufacturer or authorized distributors?
All MJE270TG 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 MJE270TG meets industry standards.
7.What is the process for return or replacement of MJE270TG?
All MJE270TG units undergo pre-shipment inspection (PSI). If there is an issue with MJE270TG, 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 MJE270TG part is unused and in its original packaging.
Return procedure for MJE270TG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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