onsemi 2N5366_D27Z

Overview

2N5366_D27Z from Fairchild Semiconductor is a PNP general-purpose amplifier transistor in TO-92 package, rated for V_CEO = 40 V, I_C = 500 mA continuous, and DC current gain (h_FE) of 80–300 at I_C = 2–300 mA, used in low-to-mid-power linear amplification and switching circuits in industrial control modules.

For engineers reviewing the 2N5366_D27Z datasheet, pinout, applications, or equivalent options, key selection criteria include its PNP polarity, TO-92 mechanical compatibility, V_CEO/V_CBO = 40 V rating, h_FE variation across collector current range, and thermal dissipation limit of 625 mW at T_A = 25°C.

Technical Context

This device operates as a silicon PNP bipolar junction transistor optimized for general-purpose amplification up to 300 mA collector current, with specified h_FE minima at three bias points (2 mA, 50 mA, 300 mA), enabling predictable gain behavior across signal-level and power-switching use cases.

Its thermal design is constrained by R_θJA = 200°C/W and derating slope of 5.0 mW/°C above 25°C ambient, requiring careful PCB copper area planning when operating near maximum power dissipation or elevated junction temperatures.

Key Specifications

Pinout & Package

2N5366_D27Z is housed in a standard TO-92 plastic package with 3 leads. Pin numbering follows JEDEC TO-92 outline: Lead 1 = Emitter, Lead 2 = Collector, Lead 3 = Base.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPSA92 and BC557, the 2N5366_D27Z uniquely balances 40 V breakdown, 500 mA current handling, and verified h_FE across 2–300 mA-making it optimal for industrial analog front-ends requiring both signal fidelity and moderate power delivery.

Availability

2N5366_D27Z is available at Aetrix Electronics and suitable for industrial sensor conditioning, low-power DC motor control, and linear regulator pass elements requiring stable component supply and long-term obsolescence management.

Supply support for 2N5366_D27Z 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

Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016.

The 2N5366_D27Z belongs to Fairchild's legacy general-purpose bipolar transistor family, designed specifically for cost-sensitive, reliability-critical industrial amplification and switching applications where TO-92 compatibility and predictable DC gain behavior are essential.

FAQ

What is the pin configuration of the 2N5366_D27Z?

The 2N5366_D27Z uses a standard TO-92 package with pin 1 as Emitter, pin 2 as Collector, and pin 3 as Base. This configuration is confirmed in the original Fairchild datasheet Rev. A1 and matches JEDEC TO-92 mechanical outline drawings. The 2N5366_D27Z must be mounted with correct lead orientation to ensure proper PNP biasing in circuit layouts.

Does the 2N5366_D27Z support switching applications?

Yes, the 2N5366_D27Z supports switching applications with V_CE(sat) = 0.25 V at I_C = 50 mA and 1.0 V at I_C = 300 mA, and a maximum I_C of 500 mA. Its PNP structure allows high-side switching, and the specified h_FE values enable reliable base drive calculation. The 2N5366_D27Z is commonly used in relay drivers and LED current sinks where moderate speed and current are required.

What is the maximum junction temperature for the 2N5366_D27Z?

The 2N5366_D27Z has a specified operating junction temperature range of −55°C to +150°C. This rating is defined in the Absolute Maximum Ratings table of the Fairchild datasheet and applies under all valid bias conditions. Derating of power dissipation begins above 25°C ambient, and the 2N5366_D27Z must be thermally managed to stay within this T_J limit during sustained operation.

Is the 2N5366_D27Z RoHS compliant?

The 2N5366_D27Z was manufactured prior to RoHS enforcement deadlines and predates formal RoHS certification by Fairchild. It contains lead in the solderable finish and packaging materials. For new designs requiring RoHS compliance, Aetrix recommends evaluating modern alternatives such as the NSS60201MR6T1G (SOT-23, PNP, RoHS-compliant), while the 2N5366_D27Z remains available for legacy repair and maintenance of existing systems.

How does hFE vary with collector current in the 2N5366_D27Z?

The 2N5366_D27Z specifies h_FE minima at three distinct operating points: ≥80 at V_CE = 10 V, I_C = 2.0 mA; ≥100 at V_CE = 1.0 V, I_C = 50 mA; and ≥40 at V_CE = 5.0 V, I_C = 300 mA. This multi-point characterization allows designers to select appropriate bias points for either high-gain signal stages or robust power switching, and the 2N5366_D27Z exhibits predictable degradation at high current rather than abrupt collapse.