onsemi PN4250A_D27Z

Overview

PN4250A_D27Z from Fairchild Semiconductor is a PNP general-purpose bipolar junction transistor (BJT) designed for amplification and switching applications with continuous collector current up to 500 mA and V_CEO = 60 V. It operates across –55°C to +150°C, features h_FE of 250–700 at I_C = 100 µA, V_CE(sat) ≤ 0.25 V at I_C = 10 mA/I_B = 0.5 mA, and is packaged in TO-92 with Emitter-first tape-and-reel configuration (EOL code D27Z).

For engineers reviewing the PN4250A_D27Z datasheet, pinout, applications, or equivalent options, key selection considerations include its PNP polarity, TO-92 mechanical compatibility, DC current gain range, saturation voltage under defined drive conditions, and thermal resistance (R_θJA = 200°C/W) for low-power linear and switching use cases.

Technical Context

This PNP BJT uses Process 68 silicon technology and is rated for continuous operation up to 150°C junction temperature. Its OFF-state breakdown ratings-V_(BR)CEO, V_(BR)CBO, and V_(BR)EBO-are all specified at 60 V, 60 V, and 5.0 V respectively, with leakage currents (I_CBO ≤ 10 nA, I_EBO ≤ 20 nA) confirming tight junction isolation.

In ON-state operation, it delivers h_FE = 250–700 at V_CE = 5.0 V/I_C = 100 µA and supports small-signal gain (h_fe) of 250–800 at I_C = 1.0 mA. Output capacitance (C_ob = 6.0 pF at V_CB = 5.0 V/f = 1 MHz) and noise figure (NF = 2.0 dB at I_C = 250 µA/RS = 1 kΩ) indicate suitability for audio-frequency amplification and low-noise preamp stages.

Key Specifications

Pinout & Package

PN4250A_D27Z is housed in a standard TO-92 plastic package with straight leads and Emitter-first orientation per tape-and-reel specification (EOL code D27Z). The flat side of the package faces downward during taping, and adhesive tape is applied to the top side.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPSA92 and BC807-40, PN4250A_D27Z offers balanced trade-offs: sufficient 60 V breakdown for mid-rail systems, wide h_FE range for flexible bias design, and TO-92 through-hole compatibility for prototyping and serviceability-making it optimal for cost-sensitive, low-to-medium frequency analog and switching functions.

Availability

PN4250A_D27Z is available at Aetrix Electronics and suitable for audio pre-amplifiers, relay drivers, LED current sinks, and temperature-sensing bias networks requiring stable component supply and long-term manufacturability.

Supply support for PN4250A_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 devices before its acquisition by ON Semiconductor in 2016.

PN4250A_D27Z belongs to Fairchild's legacy general-purpose bipolar transistor product line, engineered for robustness and consistency in industrial control, consumer audio, and power interface applications.

FAQ

What is the pin configuration of PN4250A_D27Z?

PN4250A_D27Z uses a TO-92 package with Emitter-first orientation in tape-and-reel packaging (EOL code D27Z). When viewing the flat side of the package facing you with leads pointing downward, the left-to-right pin order is Emitter (E), Base (B), Collector (C). This matches standard TO-92 PNP pinout and is confirmed in Fairchild's Tape and Reel Data documentation.

Does PN4250A_D27Z support switching applications?

Yes, PN4250A_D27Z is explicitly designed for switching applications requiring collector currents up to 300–500 mA. Its V_CE(sat) ≤ 0.25 V at I_C = 10 mA/I_B = 0.5 mA and fast turn-on/off characteristics (inferred from C_ob = 6.0 pF) make it suitable for low-frequency (<1 MHz) digital switching, relay driving, and LED control in PN4250A_D27Z-based circuits.

What is the maximum operating temperature for PN4250A_D27Z?

PN4250A_D27Z has a specified operating junction temperature range of –55°C to +150°C. This allows reliable operation in harsh environments such as automotive engine compartments or industrial motor controls, provided PCB layout and ambient conditions maintain junction temperature within this limit-verified via R_θJA = 200°C/W and power dissipation calculations.

How does PN4250A_D27Z differ from PN2222A?

PN4250A_D27Z is a PNP transistor with V_CEO = 60 V and h_FE = 250–700, while PN2222A is an NPN device with V_CEO = 40 V and h_FE = 100–300. They are complementary in polarity and not interchangeable without circuit redesign. PN4250A_D27Z serves high-side switch roles and inverted amplification, unlike the low-side NPN functionality of PN2222A.

Is PN4250A_D27Z RoHS compliant?

PN4250A_D27Z was manufactured prior to full RoHS enforcement and is documented in Fairchild's legacy datasheets without explicit RoHS marking. For new designs requiring compliance, Aetrix Electronics recommends verifying current status with ON Semiconductor (Fairchild's successor) or selecting modern RoHS-compliant equivalents such as BC807-40, while PN4250A_D27Z remains viable for legacy repair and non-regulated applications.