onsemi 2N3906_D11Z

Overview

2N3906_D11Z from onsemi is a PNP bipolar junction transistor (BJT) designed for general-purpose amplification and switching in low-power analog and digital circuits, with V_CEO = −40 V, I_C = −200 mA, and h_FE = 100 at I_C = −10 mA. It operates reliably across −55°C to +150°C and is commonly used in discrete logic inverters, LED drivers, and biasing networks.

For engineers reviewing the 2N3906_D11Z datasheet, pinout, applications, or equivalent options, key selection criteria include its TO-92 package compatibility, PNP polarity, DC current gain range (60–300), saturation voltage (−0.25 V at I_C = −10 mA), and thermal resistance (R_θJA = 200°C/W).

Technical Context

The 2N3906_D11Z is a silicon PNP BJT optimized for linear amplification and saturated switching. Its structure supports operation up to 250 MHz f_T, exhibits low noise figure (4.0 dB at 10 Hz–15.7 kHz), and maintains stable h_FE across collector currents from −0.1 mA to −100 mA.

It features low capacitance (C_obo = 4.5 pF, C_ibo = 10.0 pF), fast switching times (t_d/t_r = 35 ns, t_f = 75 ns), and robust absolute ratings including V_EBO = −5.0 V and T_J = 150°C - enabling use in compact, thermally constrained designs without active cooling.

Key Specifications

Pinout & Package

2N3906_D11Z is housed in a through-hole TO-92 package (JEDEC TO-92 compliant, straight lead configuration per Figure 16), with leads arranged E-B-C (Emitter–Base–Collector) when viewed with flat side facing outward and leads downward.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP general-purpose amplifier applications.

Compared with MMBT3906 and PZT3906, the 2N3906_D11Z offers optimal balance of manufacturability, thermal performance, and legacy design compatibility in through-hole systems - making it ideal for service replacements, educational kits, and cost-sensitive industrial controls where manual assembly remains viable.

Availability

2N3906_D11Z is available at Aetrix Electronics and suitable for LED driver circuits, discrete logic inverters, analog signal amplifiers, power supply bias networks, and sensor interface modules requiring stable component supply and long-term obsolescence management.

Supply support for 2N3906_D11Z 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

onsemi (formerly ON Semiconductor) is a global semiconductor manufacturer specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The 2N3906_D11Z belongs to onsemi's legacy general-purpose transistor family, engineered for reliability, wide temperature operation, and ease of integration in discrete analog and mixed-signal systems.

FAQ

What is the pin configuration of the 2N3906_D11Z?

The 2N3906_D11Z uses a TO-92 package with Emitter–Base–Collector (E-B-C) pinout when viewed with the flat side facing outward and leads pointing down. Lead 1 (left) is Emitter, Lead 2 (center) is Base, and Lead 3 (right) is Collector - matching JEDEC TO-92 standard orientation and confirmed by onsemi's physical dimension diagrams.

Does the 2N3906_D11Z support switching applications?

Yes, the 2N3906_D11Z is explicitly rated for switching use with documented parameters including t_d = 35 ns, t_r = 35 ns, t_s = 225 ns, and t_f = 75 ns at I_C = −10 mA. Its −0.25 V V_CE(sat) and −0.65 V V_BE(sat) ensure efficient saturation in digital logic and load-switching circuits.

What is the maximum power dissipation of the 2N3906_D11Z?

The 2N3906_D11Z has a total device dissipation (P_D) of 625 mW at T_A = 25°C, with a derating factor of 5.0 mW/°C above that temperature. This value is specified for the TO-92 package and validated under FR-4 PCB mounting conditions per onsemi's thermal characterization data.

Is the 2N3906_D11Z RoHS compliant?

Yes, the 2N3906_D11Z is RoHS compliant and meets EU Directive 2011/65/EU requirements. onsemi confirms compliance for all standard 2N3906 variants including TO-92 packaged units, with lead-free finish and halogen-free molding compound as documented in their material declarations.

How does the 2N3906_D11Z compare to the 2N3904 in circuit design?

The 2N3906_D11Z is the PNP complement to the NPN 2N3904, sharing identical package options, voltage ratings (|V_CEO| = 40 V), and gain ranges but opposite polarity. Designers use them together in push-pull amplifiers, differential pairs, and complementary logic - with the 2N3906_D11Z sourcing current and the 2N3904 sinking it.