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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

Nexperia USA Inc. 2PC4081S,115

Name: 2PC4081S,115
Brand: Nexperia USA Inc.
SKU: 2PC4081S,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2PC4081S,115

Manufacturer:: Nexperia USA Inc.

Category:: Single Bipolar Transistors

Package:: SC-70, SOT-323

Datasheet:: 2PC4081S,115.pdf

Description:: TRANS NPN 50V 0.15A SOT-323

Quantity:: RFQ Add To RFQ list

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Inventory:7,804

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Product details

Overview

2PC4081S from Nexperia is an NPN general-purpose transistor in SOT323 (SC-70) package, rated for 50 V V_CEO, 150 mA I_C, and DC current gain (h_FE) of 270–560 at 1 mA/6 V. It serves as a low-voltage, low-current switching or small-signal amplification device in compact consumer and industrial PCBs.

For engineers reviewing the 2PC4081S datasheet, 2PC4081S pinout, 2PC4081S application, or 2PC4081S equivalent, key selection criteria include verified SC-70 footprint compatibility, guaranteed h_FE range at 1 mA bias, V_CE(sat) ≤ 400 mV at 50 mA/5 mA drive, thermal resistance of 625 K/W on FR4, and PNP complement availability (2PA1576S).

Technical Context

This discrete NPN bipolar junction transistor operates in linear or saturated switching modes with base-emitter forward voltage ~0.7 V and transition frequency f_T = 100 MHz at 12 V/2 mA. Its low leakage (I_CBO ≤ 100 nA at 25 °C) and tight h_FE spread support stable biasing in low-power analog stages.

Designed for surface-mount assembly on standard FR4 boards, it uses a three-terminal SC-70 outline with defined thermal derating above 25 °C ambient and absolute maximum ratings aligned to IEC 60134 - including 60 V V_CBO, 7 V V_EBO, and 200 mW P_tot.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	50 V - Maximum collector-emitter voltage before breakdown under open-base condition; defines safe operating voltage headroom in low-side switch designs.
I_C	150 mA - Continuous collector current rating; sets upper limit for steady-state load drive capability in signal routing or LED bias circuits.
h_FE	270–560 - DC current gain at V_CE = 6 V, I_C = 1 mA, 25 °C; enables predictable base drive sizing for reliable saturation in logic-level interfaces.
V_CE(sat)	≤ 400 mV - Collector-emitter saturation voltage at I_C = 50 mA, I_B = 5 mA; ensures low conduction loss and minimal self-heating during switching.
f_T	100 MHz - Transition frequency at V_CE = 12 V, I_C = 2 mA; supports audio-frequency amplification and fast digital edge handling up to ~10 MHz.
R_th(j-a)	625 K/W - Junction-to-ambient thermal resistance on single-sided FR4 board; determines temperature rise per watt dissipated in unheatsinked layouts.

Pinout & Package

Package: SOT323 (SC-70), plastic surface-mounted, 3-lead, 1.3 mm pitch, body dimensions 2.0 mm × 1.25 mm × 0.95 mm.

Pin/Terminal	Circuit Role	Design Meaning
1	Base (B)	Control terminal for injecting minority carriers; requires current-limited drive (I_B ≤ 200 mA peak) to avoid damage or excessive power dissipation.
2	Emitter (E)	Current sink node tied to reference potential; connects directly to ground or common return path in low-side switch configurations.
3	Collector (C)	Output terminal sourcing current to load; must remain within 50 V and 150 mA limits under all operating conditions including transients.

Key Features

Feature	Design Value
Low-profile SMT package	SOT323 footprint enables high-density placement in space-constrained applications like wearables and sensor modules.
Guaranteed h_FE range	270–560 at 1 mA/6 V ensures consistent gain across production lots, reducing need for individual bias trimming in production.
Low V_CE(sat)	≤ 400 mV at 50 mA/5 mA allows efficient switching with minimal voltage drop, preserving headroom in 3.3 V or 5 V rail systems.
Thermal robustness	150 °C max junction temperature and 625 K/W R_th(j-a) support operation in sealed enclosures without forced airflow.

Applications

Portable Audio Amplifiers

Microcontroller GPIO Expanders

Use Scenario: Amplifying line-level signals in battery-powered headphones or Bluetooth speakers.

IC Role / Device Role / Timing Role: Small-signal NPN amplifier stage providing voltage gain with minimal quiescent current.

Use Value: High h_FE and low noise enable clean amplification at <1 mA bias, extending battery life while maintaining SNR > 70 dB.

Use Scenario: Driving LEDs, relays, or MOSFET gates from microcontroller output pins with limited current capability.

IC Role / Device Role / Timing Role: Low-side switch translating 3.3 V logic into higher-current loads.

Use Value: Verified V_CE(sat) ≤ 400 mV ensures full logic-low output even at 50 mA load, preventing unintended partial turn-on of downstream devices.

USB Peripheral Power Control

Industrial Sensor Signal Conditioning

Use Scenario: Enabling/disabling 5 V USB peripheral power rails under host controller command.

IC Role / Device Role / Timing Role: Load switch controlling VBUS path with fast turn-on/turn-off response.

Use Value: 100 MHz f_T and low C_c (2–3.5 pF) minimize switching delay and capacitive loading on control lines.

Use Scenario: Level-shifting and buffering analog sensor outputs (e.g., thermistor, photodiode) before ADC input.

IC Role / Device Role / Timing Role: Emitter-follower buffer isolating high-impedance sensors from noisy digital sections.

Use Value: Tight h_FE tolerance and low I_CBO (<100 nA) preserve signal integrity and offset stability over temperature.

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
BC846B,215	Same SOT323 package; h_FE = 200–450 at 10 mA/5 V; V_CEO = 65 V; slightly higher V_CE(sat) (max 600 mV at 100 mA/5 mA).	Better voltage margin but lower gain consistency at low I_C; less suitable for 1 mA bias precision amplification.	Prefer when higher V_CEO headroom is critical and load currents exceed 50 mA.
MMBT3904LT1G	SOT23 package (larger footprint); h_FE = 100–300 at 10 mA/1 V; V_CEO = 40 V; higher R_th(j-a) (~700 K/W).	Not pin-compatible; requires PCB redesign; lower gain and thermal performance limit use in compact, low-power designs.	Select only if SOT23 is already standardized in the design and 40 V rating suffices.

Compared with BC846B,215 and MMBT3904LT1G, the 2PC4081S delivers tighter h_FE control at low bias, lower saturation voltage, and superior thermal resistance in the smallest SC-70 form factor - making it optimal for miniaturized, battery-sensitive signal and switching functions.

Availability

2PC4081S is available at Aetrix Electronics and suitable for portable audio amplifiers, microcontroller GPIO expanders, and USB peripheral power control requiring stable component supply and consistent parametric performance across production batches.

Supply support for 2PC4081S 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, industrial, and mobile applications.

The 2PC4081S belongs to Nexperia's general-purpose bipolar transistor family, engineered for cost-effective, space-efficient signal switching and amplification in non-automotive consumer and industrial electronics.

FAQ

Is the 2PC4081S qualified for automotive applications?

No. The 2PC4081S is explicitly designated as non-automotive qualified in its revision history and legal disclaimers. It lacks AEC-Q101 qualification, automotive-grade screening, and extended temperature validation beyond −65 °C to +150 °C ambient. For automotive use, refer to Nexperia's -Q series variants such as 2PC4081SQ.

What is the maximum allowable base current for continuous operation?

The absolute maximum peak base current is 200 mA, but continuous operation must respect the total power dissipation limit of 200 mW at T_amb ≤ 25 °C. At typical V_BE ≈ 0.7 V, sustained I_B should not exceed ~285 µA to stay within P_tot - though practical designs use pulsed or current-limited drive to avoid thermal runaway.

Does the 2PC4081S have a documented PNP complement?

Yes. Nexperia specifies 2PA1576S as the direct PNP complement to the 2PC4081S, sharing identical SOT323 packaging, voltage/current ratings (V_CEO = −50 V, I_C = −150 mA), and complementary h_FE range (270–560), enabling matched pair usage in differential or push-pull topologies.

Can the 2PC4081S be used in RF matching networks?

No. While its f_T is 100 MHz, the device is not characterized for RF parameters such as S-parameters, noise figure, or impedance matching stability. Its C_c (2–3.5 pF) and lack of RF-specific layout guidance make it unsuitable for intentional RF amplification or filtering - it is intended strictly for baseband switching and low-frequency amplification.

2PC4081S,115 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:: 270 @ 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

2PC4081S,115 FAQ

1.How can I place an order for 2PC4081S,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for 2PC4081S,115 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 2PC4081S,115 reliable?

The price and inventory of 2PC4081S,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2PC4081S,115 is usually 5 days.

3.What payment methods are accepted for 2PC4081S,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2PC4081S,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2PC4081S,115?

2PC4081S,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2PC4081S,115 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 2PC4081S,115?

For technical support, including 2PC4081S,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2PC4081S,115 requirements.

6.How does Aetrix verify that 2PC4081S,115 is sourced from the original manufacturer or authorized distributors?

All 2PC4081S,115 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 2PC4081S,115 meets industry standards.

7.What is the process for return or replacement of 2PC4081S,115?

All 2PC4081S,115 units undergo pre-shipment inspection (PSI). If there is an issue with 2PC4081S,115, 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 2PC4081S,115 part is unused and in its original packaging.

Return procedure for 2PC4081S,115:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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