onsemi BC327-16ZL1

Overview

BC327-16ZL1 from onsemi is a PNP silicon general-purpose amplifier transistor in TO-92 package, rated for −45 V_CEO, −800 mA_C, and 625 mW at T_A = 25°C, with DC current gain (h_FE) of 100–160 at I_C = −100 mA and V_CE = −1.0 V, commonly used in low-voltage switching and linear amplification stages of power management and signal conditioning circuits.

For engineers reviewing the BC327-16ZL1 datasheet, pinout, applications, or equivalent options, key selection considerations include guaranteed h_FE binning (−16 variant), TO-92 mechanical compatibility, thermal resistance (R_JA = 200°C/W), and Pb-free tape-and-ammo packaging for automated assembly.

Technical Context

The BC327-16ZL1 operates as a medium-power PNP bipolar junction transistor optimized for linear amplification and saturated switching in DC-coupled and low-frequency AC applications. Its design supports base-driven operation with V_BE(on) ≤ −1.2 V and V_CE(sat) ≤ −0.7 V at I_C = −500 mA / I_B = −50 mA.

It features f_T = 260 MHz small-signal gain-bandwidth product and C_ob = 11 pF output capacitance, enabling stable performance up to several tens of MHz. Junction temperature range spans −55°C to +150°C, with R_JC = 83.3°C/W supporting heatsink-assisted thermal management.

Key Specifications

Pinout & Package

BC327-16ZL1 uses TO-92 package (Case 29, Style 17), with standardized lead configuration: Pin 1 = Collector, Pin 2 = Base, Pin 3 = Emitter. The package is Pb-free and supplied in ammo box format (2000 units).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC327-16G and BC327-25ZL1, the BC327-16ZL1 uniquely balances moderate h_FE, TO-92 ammo-box packaging for SMT placement, and proven reliability in industrial relay and LED driver designs-making it optimal for volume production requiring automated assembly and predictable drive requirements.

Availability

BC327-16ZL1 is available at Aetrix Electronics and suitable for relay drivers, LED current sinks, audio preamplifiers, and level-shifting interfaces requiring stable component supply, consistent h_FE binning, and RoHS-compliant TO-92 packaging.

Supply support for BC327-16ZL1 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, cloud, and consumer markets.

The BC327 series belongs to onsemi's legacy general-purpose bipolar transistor product line, designed for cost-sensitive, high-reliability linear and switching applications in industrial controls, power supplies, and interface circuits.

FAQ

What is the maximum continuous collector current rating for BC327-16ZL1?

The BC327-16ZL1 has a maximum continuous collector current (I_C) rating of −800 mA at T_A = 25°C. This value decreases with rising ambient temperature due to its 5.0 mW/°C thermal derating factor. At 75°C ambient, usable I_C drops to approximately −550 mA. Always verify actual operating conditions against the Safe Operating Area (SOA) curve in the BC327/D datasheet when designing for sustained load currents.

Does BC327-16ZL1 have Pb-free construction?

Yes, BC327-16ZL1 is a Pb-free device compliant with EU RoHS Directive 2011/65/EU. Its TO-92 package uses lead-free terminations and is qualified for standard lead-free reflow soldering profiles per J-STD-020. The "ZL1" suffix explicitly denotes Pb-free ammo box packaging, distinguishing it from legacy tin-lead variants like BC327-16.

What does the "−16" suffix mean in BC327-16ZL1?

The "−16" suffix in BC327-16ZL1 specifies the DC current gain (h_FE) bin: minimum h_FE = 100 and maximum h_FE = 160 at I_C = −100 mA and V_CE = −1.0 V. This binning allows designers to select predictable base drive requirements without testing individual units, improving yield in production-grade amplifier and switch circuits.

Can BC327-16ZL1 replace BC327-25ZL1 in an existing design?

BC327-16ZL1 can replace BC327-25ZL1 only if the circuit tolerates lower h_FE (100–160 vs. 160–250). In base-current-limited designs-such as microcontroller-driven switches-the BC327-16ZL1 may require increased base drive to maintain saturation. Review V_CE(sat) and I_B margins using the BC327/D datasheet curves before substitution.

What is the thermal resistance junction-to-ambient (R_JA) for BC327-16ZL1?

The BC327-16ZL1 has a specified R_JA of 200°C/W under standard JEDEC test conditions (single-layer PCB, 1 in² copper pad). This value assumes no external heatsinking; adding a 1 cm² copper pour reduces effective R_JA by ~30–40°C/W. For continuous 500 mA operation, board layout must ensure junction temperature stays below 135°C per the SOA limits.