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Nexperia USA Inc. 2PC4081R-QX
- Part No.:
- 2PC4081R-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
2PC4081R-QX.pdf
- Description:
- TRANS NPN 50V 0.15A SOT-323
- Quantity:
- Payment:
- Shipping:
Inventory:9,265
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Product details
Overview
2PC4081R-QX from Nexperia is an AEC-Q101-qualified NPN general-purpose transistor in SOT323 (SC-70) package, rated for 50 V VCEO, 150 mA IC, and DC current gain (hFE) of 180–390 at 1 mA/6 V. It serves as a compact switching or small-signal amplification device in automotive body control modules, LED drivers, and sensor interface circuits.
For engineers reviewing the 2PC4081R-QX datasheet, 2PC4081R-QX pinout, 2PC4081R-QX application, or 2PC4081R-QX equivalent, key selection criteria include its automotive qualification, low-profile SOT323 footprint, guaranteed hFE range, VCE(sat) ≤ 400 mV at 50 mA/5 mA drive, and thermal resistance of 625 K/W on FR4.
Technical Context
This discrete NPN bipolar junction transistor operates in linear or saturated switching modes with base-controlled current amplification. Its design targets low-power signal handling where space-constrained PCB layouts demand sub-2 mm² surface-mount devices.
It features guaranteed performance across −55 °C to +150 °C junction temperature, with VEB0 = 7 V, ICM = 200 mA peak, and fT = 100 MHz - enabling stable operation in automotive ambient environments and moderate-frequency analog or digital interface functions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Maximum collector-emitter voltage before breakdown; defines safe operating voltage in 12 V/24 V automotive supply rails. |
| IC | 150 mA continuous - Supports load switching up to ~1.8 W at 12 V with adequate heatsinking on FR4. |
| hFE | 180–390 at VCE = 6 V, IC = 1 mA - Ensures predictable base drive requirements for reliable saturation in logic-level interfaces. |
| VCE(sat) | ≤ 400 mV at IC = 50 mA, IB = 5 mA - Minimizes conduction loss and self-heating in high-duty-cycle switching applications. |
| fT | 100 MHz - Enables use in low-noise preamplifiers or RF bias networks up to ~10 MHz fundamental frequency. |
| Rth(j-a) | 625 K/W on FR4, single-sided copper - Requires careful thermal layout for sustained >50 mA operation above 70 °C ambient. |
| Ptot | 200 mW at Tamb ≤ 25 °C - Limits usable power dissipation without derating; critical for sealed enclosures. |
Pinout & Package
SOT323 (SC-70) plastic surface-mount package: 3-lead, 1.3 mm pitch, 2.0 mm × 1.25 mm × 0.95 mm body height, optimized for reflow soldering per IPC-7095.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base (B) | Current-controlled input node; requires ≥5 mA drive for full saturation at 50 mA collector load. |
| 2 | Emitter (E) | Common reference terminal; internally connected to PCB ground plane in low-side switch configurations. |
| 3 | Collector (C) | Output current path; connects to load (e.g., LED anode or relay coil) in low-side switching topologies. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood and cabin applications including temperature cycling, humidity, and mechanical shock. |
| Low-profile SOT323 | Enables high-density routing on space-constrained PCBs such as mirror control modules or smart actuator boards. |
| Guaranteed hFE range | 180–390 eliminates need for binning or external feedback in emitter-follower buffer designs. |
| VCE(sat) ≤ 400 mV | Reduces power loss by >30% vs. legacy SOT23 transistors at same IC/IB, improving thermal margin in sealed assemblies. |
| 150 °C max Tj | Supports operation in engine bay proximity without derating below 100 mA at 105 °C ambient. |
Applications
| Automotive Door Module Switching | LED Indicator Driver |
|---|---|
Use Scenario: Controlling window lift motors, lock actuators, and mirror positioners via microcontroller GPIO. IC Role / Device Role / Timing Role: Low-side switch providing galvanic isolation between MCU and inductive loads. Use Value: AEC-Q101 rating ensures reliability over 15-year vehicle lifetime; VCE(sat) ≤ 400 mV limits heat generation during frequent pulse-width modulated actuation. |
Use Scenario: Driving status LEDs in instrument clusters and center consoles with precise current limiting. IC Role / Device Role / Timing Role: Constant-current switch regulating LED brightness via base current control. Use Value: Tight hFE range enables consistent LED luminance across production batches without calibration. |
| Engine Control Sensor Interface | Industrial I/O Signal Conditioning |
Use Scenario: Amplifying weak signals from crankshaft position sensors or knock sensors before ADC sampling. IC Role / Device Role / Timing Role: Small-signal common-emitter amplifier with fT = 100 MHz supporting <10 MHz analog bandwidth. Use Value: Low Cc = 2–3.5 pF minimizes loading on high-impedance sensor outputs, preserving signal integrity. |
Use Scenario: Level-shifting and buffering 3.3 V logic signals to 5 V/12 V industrial fieldbus nodes. IC Role / Device Role / Timing Role: Digital translator isolating MCU I/O from higher-voltage bus transceivers. Use Value: 50 V VCEO withstands transient surges on factory floor wiring; SC-70 footprint saves board area in modular PLC I/O cards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN general-purpose transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 2PC4081R-Q | Baseline: AEC-Q101, SOT323, hFE 180–390, VCEO = 50 V | Automotive-qualified primary part | Select when AEC-Q101 compliance and SC-70 footprint are mandatory. |
| BC846BW | Non-automotive grade; same SOT323 package but hFE 110–220, VCEO = 65 V | Suitable for commercial-grade consumer or industrial control only | Choose for cost-sensitive non-automotive designs requiring higher VCEO but lower gain tolerance. |
Compared with BC846BW, 2PC4081R-QX offers tighter hFE spread and automotive qualification at the expense of 15 V lower VCEO; versus PNP complement 2PA1576R-Q, it provides matched thermal and gain characteristics for complementary pair designs in H-bridge drivers.
Availability
2PC4081R-QX is available at Aetrix Electronics and suitable for automotive body electronics, LED lighting subsystems, and industrial sensor interface circuits requiring stable component supply and long-term lifecycle support.
Supply support for 2PC4081R-QX 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.
The 2PC4081R-QX belongs to Nexperia's AEC-Q101-qualified general-purpose transistor family, engineered specifically for robust, space-efficient switching and amplification in automotive electronic control units and safety-critical subsystems.
FAQ
Is 2PC4081R-QX pin-compatible with BC846BW?
Yes - both use identical SOT323 (SC-70) pinout: Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector. Layout reuse is possible, but note that 2PC4081R-QX has higher hFE and AEC-Q101 qualification, while BC846BW offers higher VCEO (65 V) without automotive testing.
What is the maximum allowable base current for continuous operation?
The absolute maximum peak base current (IBM) is 200 mA, but for continuous DC operation, limit IB to ≤20 mA to avoid thermal runaway. At IC = 150 mA, a typical design uses IB = 15 mA (hFE ≈ 10), ensuring deep saturation while staying within Ptot = 200 mW.
Can 2PC4081R-QX be used in linear amplifier configurations?
Yes - its fT = 100 MHz and low Cc = 2–3.5 pF support small-signal amplification up to ~10 MHz. However, linearity is not characterized; use only in non-critical gain stages where hFE variation and thermal drift are acceptable.
Does the "-QX" suffix indicate a different specification than "-Q"?
No - the "-QX" suffix denotes a specific tape-and-reel packaging variant (e.g., 3000 pcs/reel, 8 mm carrier tape) compliant with J-STD-020 moisture sensitivity level 1. Electrical and thermal specifications are identical to the base 2PC4081R-Q part.
2PC4081R-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 150 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Vce Saturation (Max) @ Ib, Ic:
- 400mV @ 5mA, 50mA
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 180 @ 1mA, 6V
- Power - Max:
- 200 mW
- Frequency - Transition:
- 100MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
2PC4081R-QX FAQ
1.How can I place an order for 2PC4081R-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for 2PC4081R-QX 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 2PC4081R-QX reliable?
The price and inventory of 2PC4081R-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2PC4081R-QX is usually 5 days.
3.What payment methods are accepted for 2PC4081R-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2PC4081R-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 2PC4081R-QX?
2PC4081R-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 2PC4081R-QX 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 2PC4081R-QX?
For technical support, including 2PC4081R-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2PC4081R-QX requirements.
6.How does Aetrix verify that 2PC4081R-QX is sourced from the original manufacturer or authorized distributors?
All 2PC4081R-QX 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 2PC4081R-QX meets industry standards.
7.What is the process for return or replacement of 2PC4081R-QX?
All 2PC4081R-QX units undergo pre-shipment inspection (PSI). If there is an issue with 2PC4081R-QX, 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 2PC4081R-QX part is unused and in its original packaging.
Return procedure for 2PC4081R-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
2PC4081R-QX Tags
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Diodes Incorporated
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Micro Commercial Co
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Diodes Incorporated
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BC847B,215
Nexperia USA Inc.
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MMBT2222A-TP
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