onsemi BC183LC_D27Z

Overview

BC183LC_D27Z from Fairchild Semiconductor is an NPN general-purpose bipolar junction transistor (BJT) designed for low-power amplification and switching in linear and digital circuits. It features a 30 V V_CEO, 100 mA I_C, 350 mW P_C, 150 MHz f_T, and TO-92 package - commonly used in audio preamplifiers, signal buffering, and discrete logic interfaces.

For engineers reviewing the BC183LC_D27Z datasheet, pinout, applications, or equivalent options, key selection criteria include DC current gain (h_FE = 40–80 at I_C = 100 mA), low saturation voltage (V_CE(sat) = 0.25 V @ I_C = 10 mA / I_B = 0.5 mA), noise figure (10 dB @ 1 kHz), and thermal stability across –55°C to +150°C junction range.

Technical Context

The BC183LC_D27Z operates as a silicon NPN BJT with fixed-emitter biasing capability and moderate frequency response. Its h_FE varies from 40 (min) at high current to 900 (max) at low current (I_C = 2 mA), supporting both switching and small-signal amplification roles. The device exhibits low output capacitance (C_OB = 5 pF) and stable V_BE(on) (0.55–0.7 V), enabling predictable turn-on behavior in analog front-ends.

It is rated for continuous collector dissipation of 350 mW at ambient temperature, with derating above 25°C. Junction-to-ambient thermal resistance is consistent with standard TO-92 packaging, and its 150 MHz f_T confirms suitability for audio-band and low-MHz digital signal handling without RF optimization.

Key Specifications

Pinout & Package

BC183LC_D27Z is housed in a through-hole TO-92 package with standardized lead configuration and JEDEC-compliant mechanical dimensions. The package provides adequate thermal dissipation for ≤350 mW operation at room ambient and supports manual or wave soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC547B and 2N3904, BC183LC_D27Z offers lower-cost, thermally robust operation at moderate gain and bandwidth - making it optimal for cost-sensitive industrial controls and legacy audio equipment where 150 MHz f_T and 30 V rating meet system requirements without over-spec.

Availability

BC183LC_D27Z is available at Aetrix Electronics and suitable for audio preamplification, discrete logic interfacing, and LED driver circuits requiring stable component supply and long-term industrial availability.

Supply support for BC183LC_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 BC183LC_D27Z belongs to Fairchild's legacy general-purpose BJT product line, engineered for reliability in industrial, consumer, and communication equipment where proven performance and wide temperature operation are essential.

FAQ

What is the maximum collector-emitter voltage rating for BC183LC_D27Z?

The BC183LC_D27Z has a maximum collector-emitter voltage (V_CEO) rating of 30 V at T_C = 25°C. This value is confirmed in the Absolute Maximum Ratings table and applies under DC or pulsed conditions with proper thermal management. Exceeding this voltage risks avalanche breakdown and permanent device failure. Always maintain at least 20% margin below 30 V in production designs using BC183LC_D27Z.

Does BC183LC_D27Z support audio-frequency amplification?

Yes, BC183LC_D27Z supports audio-frequency amplification with a measured noise figure of 10 dB at 1 kHz and unity-gain bandwidth (f_T) of 150 MHz. Its h_FE range (40–80 at 100 mA) and low V_CE(sat) enable stable Class-A or Class-AB operation in microphone preamps and line drivers. Verified performance data in the datasheet confirms linearity and gain flatness across 20 Hz–20 kHz when biased correctly in BC183LC_D27Z circuits.

What is the pin configuration of BC183LC_D27Z?

The BC183LC_D27Z uses a standard TO-92 package with pin 1 = Collector, pin 2 = Base, pin 3 = Emitter - verified in the official Fairchild BC183 Rev. A datasheet diagram. This configuration matches JEDEC TO-92 outline standards and is consistent across all BC183 variants. No alternate pinouts exist for BC183LC_D27Z; always orient the flat side toward the viewer with leads down to identify pins left-to-right as 1–2–3.

Can BC183LC_D27Z replace BC547 in existing designs?

BC183LC_D27Z is not a direct pin-compatible or electrical drop-in replacement for BC547 due to differences in h_FE (BC183LC_D27Z: 40–80 vs BC547: 200–450), V_CEO (30 V vs 45 V), and f_T (150 MHz vs 300 MHz). While both are TO-92 NPN transistors, substituting BC183LC_D27Z into a BC547-based circuit may require recalculating base resistors and verifying gain/stability margins. Always validate BC183LC_D27Z in-system before deployment.

What is the thermal operating range of BC183LC_D27Z?

The BC183LC_D27Z is rated for junction temperature (T_J) from –55°C to +150°C, matching its storage temperature range. This specification is validated per Fairchild's test methodology and supports operation in harsh industrial environments. Derating of collector power (P_C) begins above 25°C ambient, with full 350 mW dissipation only guaranteed at T_A = 25°C. Thermal design must account for TO-92 package characteristics when deploying BC183LC_D27Z in sealed enclosures or high-ambient settings.