Nexperia USA Inc. 2PC4081R,135

Overview

2PC4081R 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 180–390 at 1 mA/6 V. It delivers low-saturation voltage (400 mV max at 50 mA/5 mA), 2 pF typical collector capacitance, and 100 MHz transition frequency - optimized for compact signal switching and amplification in space-constrained PCBs.

For engineers reviewing the 2PC4081R datasheet, 2PC4081R pinout, 2PC4081R application, or 2PC4081R equivalent, key selection criteria include its SC-70 footprint compatibility, thermal resistance (625 K/W on FR4), non-automotive qualification status, and PNP complement 2PA1576R for push-pull designs.

Technical Context

This discrete NPN BJT operates in linear and saturation regions with verified performance across ambient temperatures from –65 °C to +150 °C. Its design supports stable small-signal amplification (f_T = 100 MHz) and fast switching (C_c = 2 pF typ) under low-voltage bias conditions (V_EB ≤ 7 V, V_CB ≤ 60 V).

Thermal behavior is characterized by R_th(j-a) = 625 K/W on standard FR4 with single-sided copper, limiting continuous power dissipation to 200 mW at T_amb ≤ 25 °C. Cut-off leakage is tightly specified: I_CBO ≤ 5 µA at 150 °C and I_EBO ≤ 100 nA at 25 °C.

Key Specifications

Pinout & Package

2PC4081R uses the SC-70 (SOT323) surface-mount plastic package: 3-terminal, 1.3 mm pitch, 2.0 × 1.25 × 0.95 mm body size, with tin-plated leads compatible with standard reflow and wave soldering profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC847BW and MMBT3904LT1G, the 2PC4081R offers optimal balance of ultra-compact size, 50 V rating, and low V_CE(sat) - making it preferred for space-constrained 3.3 V/5 V logic interface and LED driver designs where thermal load remains below 150 mW.

Availability

2PC4081R is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, and level translation interfaces requiring stable component supply, consistent parametric performance, and long-term obsolescence mitigation.

Supply support for 2PC4081R 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 headquartered in Nijmegen, Netherlands, specializing in high-volume production of essential semiconductors including logic, discretes, MOSFETs, and ESD protection devices.

The 2PC4081R belongs to Nexperia's general-purpose bipolar transistor family, engineered for cost-sensitive, space-constrained consumer and industrial applications where reliability, consistency, and SMT compatibility are prioritized over automotive-grade qualification.

FAQ

Is the 2PC4081R qualified for automotive applications?

No. The 2PC4081R is explicitly designated as non-automotive in its revision history (v.7, January 2023). It lacks AEC-Q101 qualification, has no automotive-specific testing, and carries no guaranteed PPAP documentation. For automotive use, refer to Nexperia's -Q qualified equivalents such as PBSS4041T, which undergoes temperature cycling, HTRB, and ESD validation per AEC standards.

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 V_BE ≈ 0.7 V, sustained base current should not exceed ~150 mA to avoid exceeding P_tot when combined with collector power. For reliable 100% duty-cycle switching, keep I_B ≤ 10 mA (typical for I_C = 50 mA with h_FE ≥ 180).

Can the 2PC4081R replace a 2N3904 in existing designs?

Only with layout and biasing review. While both are NPN general-purpose transistors, the 2PC4081R uses SOT323 (vs. TO-92 or SOT23 for 2N3904), has lower V_CEO (50 V vs. 40 V), higher h_FE range (180–390 vs. 100–300), and significantly lower thermal resistance (625 K/W vs. ~200 K/W for TO-92). Direct substitution requires verifying footprint compatibility, thermal margin, and base drive matching.

Does the marking code 'Z%R' indicate RoHS compliance?

Yes. Per Nexperia's marking conventions and product data sheet v.7, the 'Z' prefix in 'Z%R' denotes lead-free (Pb-free) and RoHS-compliant construction. The '%' is a placeholder for manufacturing site code (e.g., 'ZAR' = ASE Kaohsiung), and 'R' confirms tape-and-reel packaging. Full compliance documentation (including substance declarations and test reports) is available upon request from Aetrix Electronics.