onsemi BC327-25RL1

Overview

BC327-25RL1 from onsemi is a PNP silicon bipolar junction transistor designed for general-purpose amplification and switching in low-voltage, medium-current circuits. It features −45 V V_CEO, −800 mA I_C, DC current gain (h_FE) of 160–250 at −100 mA, −1.0 V V_CE, and TO-92 package. It is commonly used in discrete logic inverters, relay drivers, and LED load switches in industrial control modules.

For engineers reviewing the BC327-25RL1 datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed h_FE binning (25 variant), thermal resistance (R_JA = 200°C/W), saturation voltage (V_CE(sat) ≤ −0.7 V @ −500 mA/−50 mA), and Pb-free tape-and-reel packaging (2000 pcs/reel).

Technical Context

The BC327-25RL1 operates as a medium-power PNP BJT with fixed gain binning (h_FE = 160–250), optimized for linear amplification and hard-switching where predictable turn-on/off behavior and stable gain across temperature are required. Its −5.0 V V_EBO and −50 V V_CES support robust base-emitter and collector-base reverse bias tolerance in bidirectional signal paths.

Thermal design relies on its R_JC = 83.3°C/W and R_JA = 200°C/W ratings, enabling operation up to +150°C junction temperature when mounted on standard PCBs without heatsinking. The device exhibits f_T = 260 MHz and C_ob = 11 pF, confirming suitability for audio-frequency and low-MHz switching applications-not RF or high-speed digital.

Key Specifications

Pinout & Package

BC327-25RL1 uses the industry-standard TO-92 (Case 29, Style 17) plastic package with 3 leads, rated for 625 mW at T_A = 25°C and 1.5 W at T_C = 25°C. Lead finish is matte tin (Pb-free per J-STD-609).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC327-25 and MMBT327LT1G, the BC327-25RL1 uniquely combines tape-and-reel automation readiness, Pb-free compliance, TO-92 mechanical robustness, and guaranteed medium-gain performance-making it optimal for cost-sensitive, medium-volume industrial control manufacturing.

Availability

BC327-25RL1 is available at Aetrix Electronics and suitable for relay drivers, LED current sinks, discrete logic inverters, and linear audio preamp stages requiring stable component supply, consistent h_FE binning, and RoHS-compliant packaging.

Supply support for BC327-25RL1 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The BC327 series belongs to onsemi's legacy general-purpose bipolar transistor product line, engineered for reliability and consistency in cost-sensitive discrete amplifier and switching applications across industrial and consumer electronics.

FAQ

What is the guaranteed h_FE range for BC327-25RL1?

The BC327-25RL1 is binned to h_FE = 160–250 at I_C = −100 mA and V_CE = −1.0 V, with a maximum of 400 under those conditions. This tighter gain spread versus the base BC327 (100–630) simplifies base resistor selection and improves batch-to-batch consistency in production BC327-25RL1 designs.

Is BC327-25RL1 RoHS compliant and lead-free?

Yes, BC327-25RL1 is manufactured with a matte tin lead finish and meets RoHS Directive 2011/65/EU requirements. The "G" suffix (e.g., BC327-25RL1G) explicitly denotes Pb-free packaging, and the RL1 variant itself is shipped in RoHS-compliant tape-and-reel format per onsemi's documentation.

Can BC327-25RL1 replace BC327-16RL1 in an existing design?

Yes, BC327-25RL1 can directly replace BC327-16RL1 if the circuit tolerates higher h_FE (160–250 vs. 100–160). Base drive current may decrease slightly, but V_CE(sat), V_CEO, and package remain identical. Verify stability in linear applications where gain variation affects loop response.

What is the maximum power dissipation of BC327-25RL1 at 70°C ambient?

At T_A = 70°C, BC327-25RL1's power dissipation must be derated from 625 mW at 25°C by 5.0 mW/°C, yielding 625 − (45 × 5) = 400 mW maximum. Exceeding this risks thermal runaway; for >400 mW loads, consider heatsinking or forced airflow to maintain BC327-25RL1 reliability.

Does BC327-25RL1 support operation at −40°C?

Yes, BC327-25RL1 is fully specified from −55°C to +150°C junction temperature. At −40°C ambient, its h_FE typically increases by ~15% and V_BE(on) rises by ~2 mV/°C, both within datasheet limits-making BC327-25RL1 suitable for outdoor industrial sensors and automotive body-control modules.