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onsemi 2N6285
- Part No.:
- 2N6285
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- Die
- Datasheet:
-
2N6285.pdf
- Description:
- TRANS PNP DARL 60V 20A DIE
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
2N6285 from ON Semiconductor is a PNP Darlington complementary silicon power transistor designed for low-frequency switching and general-purpose amplifier applications. It features VCEO(sus) = 60 Vdc (min), hFE = 4000 (typ) at IC = 10 A, and PD = 160 W at TC = 25°C - enabling robust high-current control in industrial motor drives and relay drivers.
For engineers reviewing the 2N6285 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specifications, thermal derating behavior, safe operating area limits, and validated alternative parts for high-reliability power switching designs.
Technical Context
The 2N6285 is a monolithic PNP Darlington transistor with built-in base-emitter shunt resistors, eliminating external bias network requirements. Its architecture delivers high DC current gain while maintaining stable saturation characteristics across temperature - critical for linear amplification and hard-switching duty cycles.
It operates within a junction temperature range of −65°C to +200°C and exhibits RθJC = 1.09°C/W, supporting high-power dissipation when mounted on properly sized heatsinks. The device's second-breakdown-limited SOA ensures reliable operation under pulsed load conditions up to 5 ms at rated voltage and current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO(sus) | 60 Vdc minimum - defines maximum sustainable collector-emitter voltage before breakdown during switching transitions |
| hFE | 4000 typical at IC = 10 A - enables low-base-drive-current control of high collector loads |
| IC (cont) | 20 Adc continuous - supports sustained high-current output in motor control and power supply circuits |
| PD | 160 W at TC = 25°C - requires active heatsinking above ~75°C case temperature per derating curve |
| VCE(sat) | 2.0 V max at IC = 10 A, IB = 40 mA - determines conduction loss and thermal rise in saturated switching mode |
| RθJC | 1.09°C/W maximum - sets minimum thermal interface resistance needed to maintain TJ < 200°C |
| TJ Range | −65°C to +200°C - allows deployment in extreme ambient environments including industrial and automotive under-hood locations |
Pinout & Package
2N6285 uses the TO-204AA (TO-3) metal-can package with three terminals: Collector (case), Base (center lead), and Emitter (outer lead). The case serves as the collector connection and must be electrically isolated from heatsink unless circuit topology permits common-collector configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Case (Metal Can) | Collector | Primary heat path and high-current output node; requires insulating washer if mounted to grounded heatsink |
| Center Lead | Base | Low-impedance input for Darlington driver stage; internal shunt resistor reduces turn-off time |
| Outer Lead | Emitter | Reference terminal for emitter-follower or common-emitter configurations; carries full load current |
Key Features
| Feature | Design Value |
|---|---|
| Monolithic Darlington structure | Integrates driver and output transistors with matched thermal tracking and reduced layout complexity |
| Built-in base-emitter shunt resistor | Accelerates turn-off by discharging stored base charge - improves switching speed without external components |
| JEDEC-registered ratings | Guarantees compliance with industry-standard stress test protocols for reliability validation |
| Second-breakdown SOA | Defined pulse limits up to 5 ms support surge-tolerant operation in inductive load switching |
| High-temperature junction rating | +200°C max TJ enables use in sealed enclosures or high-ambient industrial settings |
Applications
| Industrial Motor Control | DC Power Relay Driving |
|---|---|
Use Scenario: Controlling 12–48 VDC brushed motors in factory automation systems with PWM frequencies below 1 kHz. IC Role / Device Role / Timing Role: High-current PNP switch in common-emitter configuration, sinking load current to ground via emitter. Use Value: 4000 hFE minimizes base drive power; 60 V VCEO(sus) accommodates back-EMF spikes up to 50 V. |
Use Scenario: Driving high-coil-resistance industrial relays requiring >15 A inrush current and sustained 10 A hold current. IC Role / Device Role / Timing Role: Saturated switch delivering full coil current with <2.0 V VCE(sat) to limit self-heating. Use Value: 160 W power rating enables brief inrush surges without thermal shutdown; TO-3 package ensures mechanical ruggedness. |
| Linear Audio Amplifier Output Stage | High-Voltage DC Power Supply Regulation |
Use Scenario: Complementary output pair in Class AB audio amplifiers delivering 50 W into 8 Ω loads at ≤20 kHz. IC Role / Device Role / Timing Role: PNP output transistor in emitter-follower configuration, providing low-impedance drive and wide bandwidth. Use Value: 1.09°C/W RθJC supports stable bias point under dynamic thermal cycling; fT > 1 MHz ensures fidelity at audio frequencies. |
Use Scenario: Series pass element in adjustable linear regulators powering sensitive analog instrumentation at 24–48 V outputs. IC Role / Device Role / Timing Role: Voltage-controlled current source regulating output by dissipating excess input-output differential voltage. Use Value: −65°C to +200°C TJ range maintains regulation stability across wide ambient shifts; 60 V rating covers 48 V system margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-gain PNP power switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MJD127G | TO-220 package, lower PD = 30 W, VCEO = 100 V, hFE = 1000–4000 (wide spread) | Suitable for PCB-mounted medium-power designs where heatsink space is constrained but voltage margin is critical | Select when board-level integration and lower thermal mass are prioritized over peak power handling |
| BDW53C | TO-220, PD = 90 W, VCEO = 100 V, hFE = 750–2500, no integrated shunt resistor | Requires external base resistor network; better suited for linear regulator pass devices than fast switching | Choose when higher voltage rating and tighter hFE tolerance are needed, and discrete base bias is acceptable |
Compared with MJD127G and BDW53C, the 2N6285 offers superior thermal capacity (160 W vs. ≤90 W), guaranteed high hFE (4000 typ), and integrated turn-off assist - making it optimal for high-reliability, high-current industrial switching where TO-3 mechanical robustness and thermal headroom are essential.
Availability
2N6285 is available at Aetrix Electronics and suitable for industrial motor control, DC power relay driving, linear audio amplifier output stages, and high-voltage DC power supply regulation requiring stable component supply across extended production lifecycles.
Supply support for 2N6285 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
ON Semiconductor is a global supplier of energy-efficient semiconductor solutions, specializing in power management, analog, and discrete devices for industrial, automotive, and cloud infrastructure markets.
The 2N6285 belongs to ON Semiconductor's legacy Darlington power transistor family, engineered for high-current, low-frequency switching and linear amplification in demanding industrial environments.
FAQ
What is the maximum continuous collector current for the 2N6285?
The 2N6285 supports 20 Adc continuous collector current at TC = 25°C. Derating is required above this temperature - for example, at TC = 100°C, maximum IC drops to approximately 12 A based on the 0.915 W/°C thermal derating factor. Always verify operation within the SOA curves in Figures 5–7 of the official datasheet.
Does the 2N6285 have an integrated base-emitter shunt resistor?
Yes, the 2N6285 features monolithic construction with a built-in base-emitter shunt resistor. This design accelerates turn-off by providing a discharge path for stored base charge, reducing switching time without requiring external components - a key differentiator from standard bipolar transistors like the BDW53C.
What is the safe operating area (SOA) limitation for the 2N6285 at 60 V VCE?
At VCE = 60 V, the 2N6285's SOA is limited to approximately 1.5 A for DC operation and up to 10 A for 1 ms pulses (per Figure 5). This reflects second-breakdown constraints - not thermal limits - and must be strictly observed to prevent catastrophic failure during inductive load switching.
Can the 2N6285 be used as a direct replacement for the 2N6282 in a circuit?
No - the 2N6285 is a PNP complement to the NPN 2N6282. They share identical voltage, current, and power ratings but opposite polarity. Swapping them without inverting biasing and load connections will cause circuit failure. Use only as part of a matched complementary pair in push-pull topologies.
What is the thermal resistance from junction to case (RθJC) for the 2N6285?
The 2N6285 has a maximum RθJC of 1.09°C/W, measured from die junction to the metal case (collector terminal). This value assumes proper mounting with thermal compound and a flat, clean heatsink surface. Real-world performance depends on interface quality and heatsink thermal resistance to ambient.
2N6285 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- Die
- Packaging:
- Bulk
- Product Status:
- Active
- Transistor Type:
- PNP - Darlington
- Current - Collector (Ic) (Max):
- 20 A
- Voltage - Collector Emitter Breakdown (Max):
- 60 V
- Vce Saturation (Max) @ Ib, Ic:
- 3V @ 200mA, 20A
- Current - Collector Cutoff (Max):
- 1mA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 750 @ 10A, 3V
- Power - Max:
- 160 W
- Frequency - Transition:
- -
- Operating Temperature:
- -65°C ~ 200°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Die
2N6285 FAQ
1.How can I place an order for 2N6285 through Aetrix?
Please submit a Request for Quotation (RFQ) for 2N6285 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 2N6285 reliable?
The price and inventory of 2N6285 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2N6285 is usually 5 days.
3.What payment methods are accepted for 2N6285?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2N6285 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 2N6285?
2N6285 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 2N6285 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 2N6285?
For technical support, including 2N6285 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2N6285 requirements.
6.How does Aetrix verify that 2N6285 is sourced from the original manufacturer or authorized distributors?
All 2N6285 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 2N6285 meets industry standards.
7.What is the process for return or replacement of 2N6285?
All 2N6285 units undergo pre-shipment inspection (PSI). If there is an issue with 2N6285, 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 2N6285 part is unused and in its original packaging.
Return procedure for 2N6285:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
2N6285 Tags
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