Nexperia USA Inc. 2PC4081S,135

Overview

2PC4081S 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 270–560 at 1 mA/6 V. It serves as a low-voltage, low-current switching or small-signal amplification device in space-constrained PCB layouts.

For engineers reviewing the 2PC4081S datasheet, 2PC4081S pinout, 2PC4081S application, or 2PC4081S 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 non-automotive qualification status.

Technical Context

The 2PC4081S operates as a standard silicon NPN BJT with base-controlled current amplification. Its design targets linear amplification and saturated switching in low-power analog and digital signal paths where compactness and predictable DC gain are prioritized over RF performance or high-speed switching.

It features absolute maximum ratings including 60 V V_CBO, 7 V V_EBO, 200 mW P_tot at T_amb ≤ 25 °C, and 150 °C T_j. Thermal performance is specified for FR4 PCB mounting with single-sided copper, defining real-world power handling limits under standard layout conditions.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC846B,215 and MMBT3904LT1G, the 2PC4081S offers superior h_FE consistency at low bias (1 mA), smallest footprint among the three, and optimal thermal resistance for FR4 mounting-making it preferred for miniaturized, low-current analog and logic interface 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, consistent parametric performance, and SOT323 footprint compatibility.

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 delivering high-performance, reliable discrete, logic, and MOSFET solutions with focus on efficiency, miniaturization, and robustness for mass-market electronics.

The 2PC4081S belongs to Nexperia's general-purpose bipolar transistor product line, engineered for cost-effective, space-efficient switching and amplification in consumer, industrial, and computing applications-not qualified for automotive use.

FAQ

Is the 2PC4081S suitable for automotive applications?

No. The 2PC4081S is explicitly designated as non-automotive qualified in its revision history and legal disclaimers. It has not undergone AEC-Q101 stress testing or qualification for temperature cycling, humidity, or vibration requirements mandated for automotive use. Engineers must select -Q suffix variants (e.g., 2PC4081SQ) for automotive-grade deployment.

What is the maximum allowable power dissipation at 85 °C ambient?

At 85 °C ambient, the 2PC4081S must be derated from its 200 mW rating at 25 °C. Using R_th(j-a) = 625 K/W, junction temperature rise is 625 × (P × 10⁻³) K. To stay below 150 °C T_j, max P = (150 − 85) / 625 = 104 mW. Therefore, maximum continuous power dissipation at 85 °C ambient is 104 mW.

Can the 2PC4081S replace a BC547 in existing designs?

Only with layout and bias redesign. The 2PC4081S uses SOT323 (3-pin, 1.3 mm pitch), whereas BC547 typically uses TO-92 or SOT23 packages with different pinouts and thermal characteristics. Electrical parameters differ: BC547 has V_CEO = 45 V, h_FE = 110–800, and higher P_tot. Direct substitution risks mechanical incompatibility, thermal overload, or gain mismatch unless verified per circuit node.

Does the 2PC4081S have a PNP complement in the same package?

Yes. The PNP complement is the 2PA1576S, also in SOT323 package, with matching voltage/current ratings (V_CEO = −50 V, I_C = −150 mA) and complementary pinout (1 = E, 2 = B, 3 = C). This pairing enables balanced push-pull or complementary symmetry designs in compact layouts without footprint changes.