onsemi BC214L

Overview

BC214L from Fairchild Semiconductor is a PNP general-purpose bipolar junction transistor (BJT) designed for amplification and switching in low-to-medium power analog and digital circuits, with V_CEO = −30 V, I_C = −500 mA continuous, h_FE ≥ 100 at I_C = −10 µA, f_T = 200 MHz, and TO-92 package - used in audio preamplifiers, relay drivers, and level-shifting interfaces.

For engineers reviewing the BC214L datasheet, pinout, applications, or equivalent options, key selection considerations include its PNP polarity, −30 V V_CEO rating, −500 mA I_C capability, 200 MHz f_T, and TO-92 mechanical compatibility in space-constrained through-hole designs.

Technical Context

The BC214L operates as a silicon PNP BJT with epitaxial planar construction, optimized for linear amplification and saturated switching. Its DC current gain (h_FE) ranges from 100 to 400 across I_C = −10 µA to −100 mA, and it delivers V_CE(sat) = −0.25 V at I_C = −10 mA / I_B = −0.5 mA.

Small-signal performance includes f_T = 200 MHz at V_CE = −5 V / I_C = −10 mA and NF = 2.0 dB at 15.7 kHz, supporting audio-frequency amplification and RF front-end stages up to VHF. Thermal resistance R_θJA = 200 °C/W enables operation up to +150 °C junction temperature.

Key Specifications

Pinout & Package

BC214L uses a standard TO-92 package with leads arranged in linear order: Emitter (Pin 1), Collector (Pin 2), Base (Pin 3), viewed from flat side with leads down. Package dimensions conform to JEDEC TO-92 outline, including 3.60 mm body width and 14.47 mm overall length.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC214 and BC557, the BC214L uniquely balances 200 MHz f_T, 2.0 dB noise figure, and guaranteed h_FE ≥ 100 - making it optimal for audio preamps and medium-speed switching where both gain and bandwidth matter.

Availability

BC214L is available at Aetrix Electronics and suitable for audio preamplifiers, relay driver circuits, and discrete logic inverters requiring stable component supply, consistent parametric performance, and long-term through-hole manufacturing support.

Supply support for BC214L 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.

The BC214L belongs to Fairchild's legacy "FACT Quiet Series™" general-purpose BJT family, engineered for low-noise amplification and reliable switching in consumer, industrial, and instrumentation equipment.

FAQ

What is the maximum collector-emitter voltage rating for BC214L?

The BC214L has a maximum collector-emitter voltage (V_CEO) rating of −30 V at T_A = 25°C. This rating is defined with the base open and reflects the device's ability to block reverse voltage in common-emitter configuration. Exceeding this value risks avalanche breakdown and permanent damage to the BC214L junction.

Does BC214L support audio-frequency amplification?

Yes, the BC214L supports audio-frequency amplification due to its 2.0 dB noise figure at 15.7 kHz and 200 MHz f_T, which ensures flat gain response across the full 20 Hz–20 kHz band. Its h_FE stability and low V_CE(sat) also reduce distortion in Class-A preamp stages - key attributes confirmed in the BC214L datasheet.

What is the pin configuration of BC214L in TO-92 package?

The BC214L uses standard TO-92 pinout: Pin 1 = Emitter, Pin 2 = Collector, Pin 3 = Base - when viewed from the flat side with leads pointing downward. This matches JEDEC TO-92 outline and is identical to BC557 and BC214, enabling direct board-level substitution where electrical specs align.

Can BC214L replace BC214 in existing designs?

BC214L can replace BC214 in most designs because they share identical pinout, package, and absolute maximum ratings. However, BC214L guarantees h_FE ≥ 100 and f_T = 200 MHz - whereas BC214 only specifies h_FE ≥ 60 and no f_T. So BC214L improves performance in gain-critical or high-frequency applications without layout changes.

What thermal derating applies to BC214L above 25°C?

The BC214L has a total power dissipation limit of 625 mW at 25°C ambient, with linear derating of 5.0 mW/°C above that temperature. At 75°C ambient, its usable power drops to 375 mW. This derating is based on R_θJA = 200 °C/W and must be applied in enclosed or high-temperature environments to avoid exceeding the 150°C max junction temperature.