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onsemi MJ11021
- Part No.:
- MJ11021
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-204AA, TO-3
- Datasheet:
-
MJ11021.pdf
- Description:
- TRANS PNP DARL 250V 15A TO204
- Quantity:
- Payment:
- Shipping:
Inventory:7,422
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Product details
Overview
MJ11021 from onsemi is a PNP complementary Darlington silicon power transistor designed for high-current, low-frequency switching and motor control circuits, delivering 15 A continuous collector current, 250 V collector-emitter sustaining voltage, and 175 W power dissipation at TC = 25 °C in TO-3 package.
For engineers reviewing the MJ11021 datasheet, pinout, applications, or equivalent options, this device is evaluated for robust safe operating area (SOA) compliance, high DC current gain (hFE ≥ 400 @ 10 A), low saturation voltage (VCE(sat) ≤ 2.0 V @ 15 A), and thermal reliability in industrial drive stages.
Technical Context
The MJ11021 implements a monolithic Darlington pair structure with integrated base-emitter shunt resistors to ensure stable turn-off behavior and reduce storage time. Its SOA is fully tested per JEDEC JESD22-A114 at VCE = 44 V, IC = 4.0 A, t = 250 ms, supporting reliable operation under inductive load transients.
Thermal design is enabled by a low junction-to-case thermal resistance of 0.86 °C/W and validated RBSOA curves up to 175 °C junction temperature. The device operates across –65 °C to +175 °C junction range and supports reverse-bias safe turn-off with clamped inductive switching per Figure 5.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO(sus) | 250 V min - Sustains 250 V during switching transients without breakdown in PNP configuration |
| IC(continuous) | 15 A - Supports continuous motor winding or solenoid drive currents without derating at TC ≤ 25 °C |
| PD @ TC=25°C | 175 W - Enables high-power linear or switching stage operation with external heatsink mounting |
| hFE @ IC=10 A | ≥400 - Reduces required base drive current to ≤25 mA for full 10 A collector conduction |
| VCE(sat) @ IC=15 A | ≤3.4 V max - Limits conduction loss to ≤51 W at full rated current, critical for thermal management |
| RJC | 0.86 °C/W - Allows precise junction temperature estimation using case temperature measurement |
| ts / tf | 2.7 μs / 2.5 μs - Enables reliable 10–20 kHz PWM switching in brushed DC motor controllers |
Pinout & Package
Package: TO-204 (TO-3), metal can with isolated collector case connection, intended for bolt-down heatsinking. Pin assignment follows Style 1 per onsemi CASE 1-07 outline: Pin 1 = Base, Pin 2 = Emitter, Case = Collector.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Base | Control input requiring ~150 mA base current for full 15 A saturation; connected to driver stage via current-limiting resistor |
| Pin 2 | Emitter | Common emitter node for PNP topology; referenced to system ground or positive rail depending on circuit configuration |
| Case | Collector | High-current output terminal electrically tied to metal can; must be insulated from heatsink unless collector is at chassis ground potential |
Key Features
| Feature | Design Value |
|---|---|
| 100% SOA tested | Validated at VCE = 44 V, IC = 4.0 A, t = 250 ms - guarantees ruggedness against short-circuit and inductive kick events |
| High hFE @ high current | hFE ≥ 400 at IC = 10 A - enables use with low-gain drivers (e.g., discrete BJT or logic-level gate buffers) |
| Low VCE(sat) at 15 A | VCE(sat) ≤ 3.4 V - reduces conduction losses by >30% vs. standard power PNP transistors at same current |
| Pb-Free TO-3 option | MJ11021G variant available - meets RoHS requirements without compromising thermal or electrical performance |
| Extended temperature range | TJ = –65 °C to +175 °C - supports deployment in automotive engine compartments and industrial furnace controls |
Applications
| Brushed DC Motor Drive | Linear Power Regulator |
|---|---|
|
Use Scenario: Full-bridge H-bridge half-leg in 100–200 W industrial fan or conveyor motor controller. IC Role / Device Role / Timing Role: PNP high-side switch in complementary Darlington pair configuration, handling bidirectional current reversal. Use Value: 250 V VCEO(sus) withstands back-EMF spikes up to 180 V; 15 A rating supports peak stall currents without SOA violation. |
Use Scenario: Pass element in adjustable 0–30 V, 10 A bench power supply with analog feedback loop. IC Role / Device Role / Timing Role: Series pass transistor regulating output voltage under constant-current and constant-voltage modes. Use Value: 175 W PD and 0.86 °C/W RJC enable stable 10 A operation at <85 °C case temperature with forced-air cooling. |
| Inductive Load Switching | High-Current Relay Driver |
|
Use Scenario: Snubberless AC/DC solenoid actuator interface in factory automation PLC output module. IC Role / Device Role / Timing Role: Low-frequency (≤100 Hz) switching element controlling 12–24 V, 8–12 A inductive loads. Use Value: Verified RBSOA up to 100 V/10 A ensures safe turn-off under unclamped inductive flyback conditions. |
Use Scenario: High-current coil driver for 24 V, 10 A industrial relay in energy meter or breaker control panel. IC Role / Device Role / Timing Role: Final-stage PNP switch sourcing current into relay coil with fast turn-on/turn-off timing. Use Value: ts = 2.7 μs and tf = 2.5 μs minimize contact bounce and coil demagnetization delay in time-critical sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP Darlington power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BDW93C | Lower VCEO(sus) = 100 V, lower hFE = 750 min @ 5 A, TO-126 package (RJC = 5 °C/W) | Not suitable for >120 V bus applications; limited to low-voltage DC-DC or audio output stages | Select BDW93C only when voltage stress <100 V and thermal budget allows higher RJC |
| MJ15003 | Higher VCEO = 200 V, higher PD = 250 W, TO-3 package, but NPN-only; requires complementary PNP pairing | Used in push-pull audio amplifiers; not drop-in for MJ11021 due to polarity mismatch | Use MJ15003 only in matched NPN/PNP amplifier designs where MJ11021's PNP role is replaced by discrete PNP partner |
Compared with BDW93C and MJ15003, the MJ11021 provides unique PNP polarity, 250 V ruggedness, and verified SOA at 44 V/4 A - making it irreplaceable in high-voltage, high-current PNP switching where both voltage headroom and transient immunity are mandatory.
Availability
MJ11021 is available at Aetrix Electronics and suitable for brushed DC motor drives, linear power regulators, inductive load switching, and high-current relay driver applications requiring stable component supply and long-term industrial lifecycle support.
Supply support for MJ11021 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 is a global semiconductor manufacturer specializing in high-performance power, analog, sensor, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The MJ11021 belongs to onsemi's legacy high-power bipolar transistor family, engineered specifically for ruggedized industrial switching and linear regulation where SOA integrity, thermal stability, and high-current gain are non-negotiable.
FAQ
What is the maximum continuous collector current rating for the MJ11021?
The MJ11021 is rated for 15 A continuous collector current at TC = 25 °C. Derating is required above 25 °C at 1.16 W/°C, and actual usable current depends on heatsink capability and ambient conditions. The device also supports 30 A peak current for pulsed operation with ≤10% duty cycle, as specified in the Maximum Ratings table.
Is the MJ11021 pin-compatible with the MJ11022?
No, the MJ11021 and MJ11022 are complementary devices (PNP and NPN respectively) with identical TO-3 mechanical packaging and pinout (Style 1: Pin 1 = Base, Pin 2 = Emitter, Case = Collector), but they are not functionally interchangeable. Circuit redesign is required to substitute one for the other due to opposite polarity and biasing requirements.
Does the MJ11021 have Pb-Free packaging options?
Yes, the MJ11021G variant is the Pb-Free version of the MJ11021, packaged in TO-3 (CASE 1-07) and compliant with RoHS Directive 2011/65/EU. Electrical and thermal specifications are identical to the standard MJ11021, and the G suffix denotes lead-free terminations and processing.
What is the Safe Operating Area (SOA) test condition for the MJ11021?
The MJ11021 undergoes 100% SOA testing at VCE = 44 V, IC = 4.0 A, pulse width = 250 ms. This validates its ability to survive transient overload conditions without second breakdown, and the SOA curves in Figures 4 and 5 define absolute limits for forward- and reverse-bias operation under real-world inductive switching.
Can the MJ11021 be used in Class AB audio amplifier output stages?
Yes, the MJ11021 is qualified for linear audio output applications, supported by its high hFE (≥400 @ 10 A), low VCE(sat), and SOA-tested thermal stability. It is commonly paired with the MJ11022 in complementary quasi-complementary output stages for high-fidelity amplifiers delivering up to 100 W into 4 Ω loads.
MJ11021 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-204AA, TO-3
- Packaging:
- Tray
- Product Status:
- Obsolete
- Transistor Type:
- PNP - Darlington
- Current - Collector (Ic) (Max):
- 15 A
- Voltage - Collector Emitter Breakdown (Max):
- 250 V
- Vce Saturation (Max) @ Ib, Ic:
- 3.4V @ 150mA, 15A
- Current - Collector Cutoff (Max):
- 1mA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 400 @ 10A, 5V
- Power - Max:
- 175 W
- Frequency - Transition:
- -
- Operating Temperature:
- -65°C ~ 200°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-204 (TO-3)
MJ11021 FAQ
1.How can I place an order for MJ11021 through Aetrix?
Please submit a Request for Quotation (RFQ) for MJ11021 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 MJ11021 reliable?
The price and inventory of MJ11021 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MJ11021 is usually 5 days.
3.What payment methods are accepted for MJ11021?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MJ11021 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MJ11021?
MJ11021 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MJ11021 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 MJ11021?
For technical support, including MJ11021 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MJ11021 requirements.
6.How does Aetrix verify that MJ11021 is sourced from the original manufacturer or authorized distributors?
All MJ11021 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 MJ11021 meets industry standards.
7.What is the process for return or replacement of MJ11021?
All MJ11021 units undergo pre-shipment inspection (PSI). If there is an issue with MJ11021, 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 MJ11021 part is unused and in its original packaging.
Return procedure for MJ11021:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MJ11021 Tags
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MMBT3906LT1G
onsemi
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Diodes Incorporated
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MMBT3904LT1G
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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
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BC846BLT1G
onsemi
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BC847B,215
Nexperia USA Inc.
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SMMBT3904LT1G
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