onsemi BC327-25RL1G

Overview

BC327-25RL1G from onsemi is a PNP epitaxial silicon transistor designed for switching and low-power amplification, with h_FE = 160–400 at I_C = −100 mA, V_CE = −1 V, V_CEO = −45 V, and P_D = 625 mW in TO-92 package. It serves as a complement to BC337/BC338 in audio driver stages, relay drivers, and discrete logic-level translation circuits.

For engineers reviewing the BC327-25RL1G datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed h_FE binning (25-class), DC current gain stability across −55°C to 150°C, saturation voltage ≤ −0.7 V at I_C = −500 mA/I_B = −50 mA, and Pb-free TO-92 leadform compliance.

Technical Context

This PNP bipolar junction transistor operates in active or saturation mode with fixed-emitter biasing topology. Its design supports linear amplification up to f_T = 100 MHz and switching duty cycles where I_C remains within −800 mA DC limit and power dissipation stays below 625 mW at 25°C ambient.

Thermal derating follows 5.0 mW/°C above 25°C with R_JA = 200°C/W on standard FR-4 PCB (76 mm × 114 mm). Breakdown ratings-V_CEO = −45 V, V_CES = −50 V, V_EBO = −5 V-define safe operating area boundaries under transient and steady-state conditions.

Key Specifications

Pinout & Package

BC327-25RL1G is housed in a Pb-free TO-92 (Case 135AR) package with 4.83 mm × 4.76 mm footprint and formed leads. The package supports through-hole mounting and meets JEDEC TO-92 mechanical standards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC327-40TA and MPSA92, BC327-25RL1G offers balanced gain (160–400), proven AF performance, and optimal thermal behavior for general-purpose switching-making it the preferred choice when moderate h_FE, low saturation loss, and wide temperature operation are jointly required.

Availability

BC327-25RL1G is available at Aetrix Electronics and suitable for audio driver stages, relay drivers, discrete logic-level translators, and low-power output stages requiring stable component supply and RoHS-compliant through-hole transistors.

Supply support for BC327-25RL1G 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 management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The BC327 series belongs to onsemi's general-purpose bipolar transistor product line, engineered for cost-sensitive, high-reliability discrete switching and amplification in consumer, industrial, and communication equipment.

FAQ

What is the guaranteed h_FE range for BC327-25RL1G?

The BC327-25RL1G is binned to h_FE = 160–400 at V_CE = −1 V and I_C = −100 mA. This specification is tested and guaranteed per onsemi's datasheet revision 2 (January 2024) and applies across the full operating temperature range of −55°C to +150°C. The BC327-25RL1G h_FE remains stable under pulsed conditions and supports predictable base resistor calculation in both switching and linear applications.

Is BC327-25RL1G pin-compatible with BC327-40TA?

Yes, BC327-25RL1G and BC327-40TA share identical TO-92 (Case 135AR) packaging, pinout (Collector-Base-Emitter on pins 1-2-3), and mechanical dimensions. Both are Pb-free and rated for the same absolute maximum voltages and currents. The BC327-25RL1G differs only in its h_FE binning (160–400 vs. 250–630), making them electrically interchangeable in most circuits where gain tolerance allows.

What is the maximum continuous collector current for BC327-25RL1G?

The absolute maximum DC collector current for BC327-25RL1G is −800 mA, as specified in the Absolute Maximum Ratings table of the official onsemi datasheet. Operation at this current requires strict adherence to thermal limits: power dissipation must remain ≤625 mW at 25°C ambient, with linear derating of 5.0 mW/°C above that temperature. At I_C = −500 mA, the BC327-25RL1G achieves V_CE(sat) ≤ −0.7 V when driven with I_B = −50 mA.

Can BC327-25RL1G replace BC337 in complementary circuits?

No-BC327-25RL1G is a PNP transistor and serves as the complementary counterpart to the NPN BC337, not a replacement. In push-pull or differential pair designs, BC327-25RL1G and BC337 are used together to provide symmetrical sourcing and sinking capability. Their matched h_FE bins (e.g., BC327-25 with BC337-25) ensure balanced gain and thermal tracking, which is critical in Class AB amplifiers and H-bridge drivers.

Does BC327-25RL1G meet RoHS requirements?

Yes, BC327-25RL1G is explicitly marked as a Pb-free device in the onsemi datasheet and complies with the EU RoHS Directive 2011/65/EU. The TO-92 package uses lead-free solderable terminations and conforms to J-STD-020 moisture sensitivity level (MSL) 1. Full material declarations and substance compliance documentation for BC327-25RL1G are available through onsemi's official product portal and authorized distribution channels.