Nexperia USA Inc. 2PC4081Q,135

Overview

2PC4081Q from Nexperia is an NPN general-purpose bipolar junction transistor in SOT323 (SC-70) package, rated for 50 V V_CEO, 150 mA I_C, and DC current gain (h_FE) of 120–270 at 1 mA/6 V. It serves as a low-voltage, low-current switch or small-signal amplifier in space-constrained PCB layouts.

For engineers reviewing the 2PC4081Q datasheet, 2PC4081Q pinout, 2PC4081Q application, or 2PC4081Q equivalent, key selection criteria include its 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 2PA1576Q for push-pull designs.

Technical Context

The 2PC4081Q operates as a standard silicon NPN BJT with base-controlled current amplification. Its design targets linear amplification and saturated switching below 50 V and 150 mA, with verified f_T ≥ 100 MHz enabling RF-coupled preamp stages up to VHF.

Thermal performance is specified for single-sided FR4 boards with tin-plated copper; R_th(j-a) = 625 K/W reflects conservative derating for ambient operation up to +150 °C, while V_EBO = 7 V and I_CBO ≤ 100 nA at 25 °C support stable biasing in low-noise analog front-ends.

Key Specifications

Pinout & Package

SOT323 (SC-70) plastic surface-mount package: 3-terminal, 1.3 mm pitch, 2.0 mm × 1.25 mm × 0.95 mm body height. Optimized for high-density routing and reflow soldering per IPC-7095 guidelines.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN general-purpose transistor applications.

Compared with BC846B and MMBT3904LT1G, the 2PC4081Q offers the tightest combination of ultra-small SC-70 size, guaranteed 120–270 h_FE at 1 mA, and 50 V V_CEO-making it optimal for space-limited, low-bias-current digital and analog functions where thermal resistance and precise gain control are prioritized over raw voltage headroom or high-current drive.

Availability

2PC4081Q is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, audio pre-amplifier stages, and low-voltage sensor signal conditioning requiring stable component supply and consistent parametric performance across production batches.

Supply support for 2PC4081Q 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 delivering high-performance, reliable discrete, logic, and MOSFET devices optimized for efficiency, miniaturization, and robustness in mass-market electronics.

The 2PC4081Q belongs to Nexperia's general-purpose bipolar transistor family, engineered for cost-sensitive, high-volume applications demanding proven reliability, tight parameter distributions, and seamless integration into compact SMT-based designs.

FAQ

Is the 2PC4081Q automotive-qualified?

No. Per Nexperia's 2023 data sheet revision, the 2PC4081Q is explicitly designated as non-automotive qualified. It is not tested to AEC-Q101 standards, lacks automotive-grade screening, and carries no warranty for use in safety-critical or life-support systems. Automotive applications require dedicated -AQ or -Q automotive variants.

What is the maximum allowable base current for continuous operation?

The absolute maximum peak base current (I_BM) 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 remain below 285 µA to avoid exceeding P_tot when combined with collector power.

Can the 2PC4081Q replace a BC547 in existing designs?

Only with circuit validation. While both are NPN general-purpose transistors, the 2PC4081Q has lower V_CEO (50 V vs. 45 V), smaller SOT323 footprint (vs. TO-92), and different h_FE test conditions (1 mA vs. 2 mA). Direct substitution requires verifying bias stability, thermal margin, and PCB land pattern compatibility.

Does the 2PC4081Q have a documented PNP complement?

Yes. The official PNP complement is the 2PA1576Q, also in SOT323 package, with matched voltage ratings (V_ECO = 50 V), current capability (I_C = −150 mA), and complementary pinout (1 = E, 2 = B, 3 = C). This pairing enables balanced push-pull output stages and differential amplifier topologies.