Nexperia USA Inc. BC816-25WX

Overview

BC816-25WX 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 160–400 h_FE at V_CE = 1 V / I_C = 100 mA. It serves as a robust switching and amplification device in space-constrained automotive and industrial control circuits.

For engineers reviewing the BC816-25WX datasheet, BC816-25WX pinout, BC816-25WX application, or BC816-25WX equivalent, key selection criteria include its 80 V breakdown voltage, thermal resistance of 431 K/W on optimized PCB layout, AEC-Q101 qualification, and SC-70 footprint compatibility with high-density routing requirements.

Technical Context

This transistor operates as a single-element NPN bipolar junction device with base-controlled current amplification. Its design supports linear amplification and saturated switching modes, with verified performance across −55 °C to +150 °C ambient range and junction temperature up to 150 °C.

It features low V_CE(sat) (≤400 mV at I_C = 500 mA / I_B = 50 mA) and high f_T (100 MHz), enabling reliable operation in 48 V board-net switching and signal buffering applications where fast turn-on/turn-off and low conduction loss are required.

Key Specifications

Pinout & Package

SOT323 (SC-70) surface-mount plastic package: 1.3 mm × 2.2 mm × 0.95 mm body, 0.65 mm lead pitch, tin-plated terminations compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC816-25WX, BC816-25LT1G trades compactness for easier handling and thermal margin, while MMBT2222ALT1G sacrifices voltage rating and gain consistency for broader availability-making BC816-25WX optimal for space-limited AEC-Q101 designs requiring 80 V headroom.

Availability

BC816-25WX is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, power supply enable circuits, and consumer appliance motor drivers requiring stable component supply and AEC-Q101 assurance.

Supply support for BC816-25WX 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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.

The BC816W series belongs to Nexperia's general-purpose transistor product line, engineered specifically for robust switching and amplification in space-constrained automotive and industrial environments where AEC-Q101 compliance and thermal efficiency are critical.

FAQ

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

Yes - both share identical SOT323 (SC-70) pinout (1: Base, 2: Emitter, 3: Collector) and mechanical footprint. The only difference is DC current gain: BC816-16WX offers h_FE 100–250, while BC816-25WX delivers 160–400. No PCB redesign is needed when upgrading gain grade.

What is the maximum allowable PCB temperature rise for continuous 500 mA operation?

At I_C = 500 mA and T_amb = 25 °C, P_tot = 290 mW with R_th(j-a) = 431 K/W yields ΔT = 125 K, so junction temperature reaches 150 °C - the absolute maximum. To maintain safety margin, limit ambient temperature to ≤75 °C or increase copper area to reduce R_th(j-a).

Does BC816-25WX support pulsed operation beyond 500 mA?

Yes - it supports I_CM = 1 A for single pulses ≤1 ms (duty cycle ≤0.02). At I_C = 1 A, V_CE(sat) remains ≤600 mV, and thermal transient impedance limits junction temperature rise to <100 K for short bursts, enabling use in intermittent load switching.

Can BC816-25WX replace BC846B in existing designs?

No - BC846B is a 65 V, 100 mA transistor in SOT23 with h_FE 200–450. While gain ranges overlap, BC816-25WX's 500 mA I_C and 80 V rating exceed BC846B's specs, but its higher capacitance (2 pF vs. 4.5 pF) and different saturation behavior require validation in high-speed or precision analog roles.