Nexperia USA Inc. BC816-16WX

Overview

BC816-16WX from Nexperia is an AEC-Q101 qualified NPN general-purpose transistor in SOT323 (SC-70) package, rated for 80 V V_CEO, 500 mA continuous I_C, and offering h_FE of 100–250 at V_CE = 1 V, I_C = 100 mA. It serves as a robust switching and amplification device in space-constrained automotive and industrial PCBs.

For engineers reviewing the BC816-16WX datasheet, BC816-16WX pinout, BC816-16WX application, or BC816-16WX equivalent, this page delivers verified electrical parameters, thermal derating behavior, SOT323 footprint details, and automotive-grade reliability context - all critical for high-reliability 48 V board net design and discrete BJT replacement validation.

Technical Context

This transistor operates as a silicon NPN bipolar junction device with base-controlled current amplification. Its 80 V V_CEO rating supports use in 48 V automotive supply rails, while its 290 mW P_tot (at T_amb ≤ 25 °C on FR4) and 625 K/W R_th(j-a) define thermal limits under free-air conditions.

The BC816-16WX features pulsed I_CM = 1 A (t_p ≤ 1 ms), V_BE(sat) ≤ 1.2 V at I_C = 500 mA, and f_T = 100 MHz - enabling reliable low-speed switching and moderate-frequency amplification without secondary breakdown concerns in linear or saturated operation.

Key Specifications

Pinout & Package

SOT323 (SC-70) is a 3-pin, surface-mount plastic package measuring 2.2 mm × 1.35 mm × 0.95 mm (L × W × H), optimized for high-density PCB layouts and reflow compatibility.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC816-16WX, BC817-16W trades voltage margin for identical gain and package but fails in 48 V automotive use, while MMBT3904LT1G offers broader h_FE spread but lacks both AEC-Q101 validation and sufficient V_CEO for board-net switching - making BC816-16WX uniquely suited for qualified 48 V discrete control.

Availability

BC816-16WX is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, compact power adapter feedback circuits, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for BC816-16WX 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

Nexperia is a global semiconductor expert focused on essential semiconductors, delivering high-performance, reliable discrete, logic, and MOSFET devices for automotive, industrial, and consumer markets.

The BC816W series belongs to Nexperia's AEC-Q101 qualified general-purpose transistor portfolio, engineered specifically for robust 48 V board-net switching and amplification in space- and reliability-constrained automotive ECUs.

FAQ

Is BC816-16WX pin-compatible with BC816-25WX?

Yes - both share identical SOT323 pinout (1: Base, 2: Emitter, 3: Collector) and mechanical footprint. The only difference is DC current gain: BC816-16WX has h_FE = 100–250, while BC816-25WX offers 160–400. No layout change is needed when swapping between these variants for gain optimization.

What is the maximum allowable junction temperature during pulsed operation?

The absolute maximum junction temperature is 150 °C. Under pulsed conditions (t_p ≤ 1 ms, duty cycle ≤ 0.02), thermal impedance drops significantly - Z_th(j-a) ≈ 100 K/W at t_p = 100 μs - allowing short-duration I_C peaks up to 1 A without exceeding T_j(max), provided ambient remains ≤ 125 °C.

Does BC816-16WX require external base resistors in switching applications?

Yes - it does not integrate base resistors. For saturation at I_C = 500 mA, a typical base drive of 50 mA is required (IC/IB = 10). A 100 Ω resistor is commonly used with 5 V logic; exact value depends on driver voltage and desired overdrive ratio, which must be calculated using V_BE(sat) ≤ 1.2 V and h_FE(min) = 100.

How does the SOT323 package affect thermal performance compared to SOT23?

SOT323 has ~30 % less copper pad area than SOT23, resulting in higher thermal resistance: R_th(j-a) = 625 K/W (SOT323) vs. ~450 K/W (SOT23) on identical FR4. This reduces continuous power handling by ~25 % - limiting BC816-16WX to 290 mW versus ~400 mW for comparable SOT23 transistors under same board conditions.