onsemi BC369_D27Z

Overview

BC369_D27Z from Fairchild Semiconductor is a PNP general-purpose amplifier transistor in TO-92 package, rated for V_CEO = 20 V, I_C = 1.5 A continuous, and P_D = 625 mW at 25°C. It delivers h_FE ≥ 50 at I_C = 5 mA and supports switching and linear amplification in medium-power industrial control circuits.

For engineers reviewing the BC369_D27Z datasheet, pinout, applications, or equivalent options, key selection criteria include its PNP polarity, TO-92 mechanical compatibility, V_CE(sat) ≤ 0.5 V at I_C = 1.0 A / I_B = 100 mA, f_T = 45 MHz, and operation across –55°C to +150°C junction temperature range.

Technical Context

The BC369_D27Z operates as a silicon PNP bipolar junction transistor optimized for medium-power linear amplification and saturated switching. Its design targets applications requiring stable DC current gain (h_FE = 50–375 depending on bias), low saturation voltage, and robust thermal performance with R_θJA = 200°C/W.

It features negative-polarity voltage/current conventions per PNP topology: V_CEO, V_CES, and V_EBO are all specified with reverse-biased junctions; collector cutoff current I_CBO remains ≤ 10 µA at 25°C and ≤ 1.0 mA at 150°C.

Key Specifications

Pinout & Package

BC369_D27Z is housed in a standard TO-92 plastic package with 3 leads. Pin identification follows JEDEC TO-92 outline: viewed from flat side with leads down, left-to-right pin order is Emitter (E), Base (B), Collector (C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC327-40 and MJD2955T4G, BC369_D27Z uniquely balances 1.5 A current capability, TO-92 mountability, and 45 MHz f_T-making it optimal for cost-sensitive, medium-power industrial controls where thermal and layout constraints preclude larger packages or higher-gain-only alternatives.

Availability

BC369_D27Z is available at Aetrix Electronics and suitable for motor control drivers, DC-DC converter switches, and linear voltage regulator pass elements requiring stable component supply and long-term industrial availability.

Supply support for BC369_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, signal conditioning, and discrete devices before its acquisition by ON Semiconductor in 2016.

The BC369_D27Z belongs to Fairchild's legacy general-purpose bipolar transistor product line, engineered for reliability in industrial switching and amplification where TO-92 form factor and moderate power handling are essential.

FAQ

What is the maximum collector current rating for BC369_D27Z?

The BC369_D27Z has a continuous collector current rating of 1.5 A at T_A = 25°C. This rating decreases with rising ambient temperature due to its 5.0 mW/°C derating slope. At 100°C ambient, usable I_C drops to approximately 250 mA. Always verify thermal design margins using R_θJA = 200°C/W and actual PCB copper area in your layout before finalizing BC369_D27Z usage.

Is BC369_D27Z pin-compatible with BC337 NPN transistors?

No, BC369_D27Z is not pin-compatible with BC337. While both use TO-92 packages, BC369_D27Z is a PNP device with E-B-C pinout (flat side facing up, leads down: left = E, center = B, right = C), whereas BC337 is NPN with E-B-C reversed (left = C, center = B, right = E). Swapping them without circuit revision will cause functional failure or damage. Always confirm pinout orientation before substitution.

What does the '_D27Z' suffix indicate in BC369_D27Z?

The '_D27Z' suffix in BC369_D27Z denotes a specific Fairchild manufacturing lot code and tape-and-reel packaging variant compliant with EIA-481-D standards. It does not alter electrical specifications versus the base BC369 part. All absolute maximum ratings, electrical characteristics, and thermal parameters remain identical to those published in the original BC369 datasheet Rev. G.

Can BC369_D27Z be used in Class-A audio amplifier stages?

Yes, BC369_D27Z can be used in Class-A audio preamplifier or driver stages due to its h_FE ≥ 50 at low currents and f_T = 45 MHz, supporting full-audio-band gain stability. However, its V_CE(sat) and thermal resistance make it less optimal for high-fidelity output stages. For such roles, complementary NPN/PNP pairs like BC337/BC327 are preferred. BC369_D27Z excels in cost-sensitive, medium-fidelity industrial audio interfaces.

Does BC369_D27Z meet RoHS requirements?

Yes, BC369_D27Z complies with RoHS Directive 2011/65/EU. As a Fairchild device manufactured prior to ON Semiconductor's acquisition, it was transitioned to lead-free (Pb-free) termination and halogen-free molding compound in accordance with industry timelines. The TO-92 package carries the "Pb-Free" marking, and material declarations confirm cadmium, hexavalent chromium, mercury, PBB, and PBDE levels below RoHS thresholds.