NXP Semiconductors 2PC1815BL,126

Overview

2PC1815BL,126 from Nexperia (formerly Philips Semiconductors) is an NPN general-purpose bipolar junction transistor in TO-92 (SOT54) package, rated for 50 V V_CEO, 150 mA I_C, and 500 mW P_tot, with DC current gain h_FE of 350–700 at I_C = 150 mA, used in audio amplifier driver stages and low-power switching circuits.

For engineers reviewing the 2PC1815BL,126 datasheet, 2PC1815BL,126 pinout, 2PC1815BL,126 application, or 2PC1815BL,126 equivalent, key selection considerations include its V_CEO/I_C rating, h_FE binning (BL grade), TO-92 thermal resistance (250 K/W), and compatibility with through-hole audio and signal amplification designs.

Technical Context

This discrete NPN BJT operates in linear or saturated mode with a transition frequency f_T of 80 MHz, enabling use in audio-frequency amplification and low-speed switching. Its low V_CE(sat) (≤300 mV at I_C = 100 mA/I_B = 10 mA) and low noise figure (≤10 dB at 1 kHz) support clean signal handling in preamplifier and driver stages.

The device features tight parameter control per grade: the BL suffix denotes h_FE = 350–700 at I_C = 150 mA, distinguishing it from Y (120–240) and GR (200–400) variants. It shares pinout and package with PNP complement 2PA1015 for complementary pair design.

Key Specifications

Pinout & Package

2PC1815BL,126 is housed in a plastic single-ended leaded (through-hole) TO-92 package (SOT54, SC-43A), with 3 leads and standard 2.54 mm lead pitch. Package dimensions: L = 14.5 mm, D = 4.8 mm, E = 4.2 mm, b = 0.48 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC547B and 2N3904, 2PC1815BL,126 offers uniquely high h_FE within the TO-92 footprint-critical for minimizing base drive current in space-constrained driver circuits-while maintaining identical thermal and mechanical integration.

Availability

2PC1815BL,126 is available at Aetrix Electronics and suitable for audio amplifier driver stages, low-voltage switching load control, and signal-level voltage level shifting requiring stable component supply and long-term obsolescence management.

Supply support for 2PC1815BL,126 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, formerly Philips Semiconductors, is a global leader in discrete, logic, and MOSFET components, headquartered in Nijmegen, Netherlands, with manufacturing in Asia and Europe.

The 2PC1815 series was designed as a cost-effective, high-reliability NPN general-purpose transistor family for consumer audio, industrial controls, and legacy replacement applications-emphasizing consistent h_FE binning and robust through-hole manufacturability.

FAQ

What is the h_FE range for 2PC1815BL,126 and how is it tested?

The 2PC1815BL,126 has a guaranteed DC current gain (h_FE) of 350–700 when measured at V_CE = 6 V and I_C = 150 mA. This binning is verified during final test using automated parametric equipment per Philips/Nexperia production standards. The "BL" suffix explicitly denotes this high-gain variant, distinct from Y (120–240) and GR (200–400) grades. Each 2PC1815BL,126 unit meets this specification before shipment.

Is 2PC1815BL,126 RoHS compliant and what is its lead finish?

Yes, 2PC1815BL,126 is RoHS compliant and features a matte tin (Sn) lead finish over copper leadframe, meeting JEDEC J-STD-020 moisture sensitivity level (MSL) 1 requirements. The device is qualified for lead-free reflow soldering up to 260 °C peak temperature. Nexperia's official compliance documentation confirms full exemption from hazardous substances per Directive 2011/65/EU, including Pb, Cd, Hg, Cr(VI), PBB, and PBDE.

Can 2PC1815BL,126 replace 2PC1815Y or 2PC1815GR in existing designs?

2PC1815BL,126 can directly replace 2PC1815Y or 2PC1815GR in most circuits due to identical pinout, package, and absolute maximum ratings-but only if the higher h_FE (350–700 vs. 120–240 or 200–400) does not cause unintended bias shift or instability. In linear amplifier designs, verify quiescent operating point; in switching applications, confirm base drive remains sufficient for saturation. No PCB changes are needed for mechanical fit.

What is the thermal resistance and how does it affect PCB layout for 2PC1815BL,126?

The junction-to-ambient thermal resistance (R_th(j-a)) of 2PC1815BL,126 is 250 K/W when mounted on a standard FR4 PCB with minimal copper area. To maintain T_j ≤150 °C at full 500 mW dissipation, ambient must stay ≤25 °C-or copper pour, thermal vias, or airflow must reduce effective R_th. Layout best practice: use ≥100 mm² of 1 oz copper connected to emitter pad, avoid enclosing the TO-92 body, and keep away from heat sources.

Does 2PC1815BL,126 have a documented PNP complement and is it pin-compatible?

Yes, the officially specified PNP complement is 2PA1015, which shares identical TO-92 (SOT54) package, pinout (1=base, 2=collector, 3=emitter), and mechanical dimensions. Both devices are designed for complementary pair use in push-pull amplifiers and differential stages. Electrical symmetry is optimized: 2PA1015 matches 2PC1815BL,126 in V_CEO (50 V), I_C (150 mA), and P_tot (500 mW), enabling balanced performance.