Nexperia USA Inc. BZX8850-B2V4YL

Overview

BZX8850-B2V4YL from Nexperia is a low-current Zener diode in SOD882 (DFN1006-2) package, designed for precision voltage regulation at 2.4 V nominal with ±2 % tolerance. It delivers stable reference voltage at 50 μA test current, features 200 mA maximum forward current, 250 mW total power dissipation, and 200 Ω typical differential resistance at I_Z = 5 mA - ideal for battery-powered sensor biasing and low-power analog signal conditioning.

For engineers reviewing the BZX8850-B2V4YL datasheet, BZX8850-B2V4YL pinout, BZX8850-B2V4YL application, or BZX8850-B2V4YL equivalent, key selection criteria include its ultra-small 1.0 × 0.6 mm footprint, low-leakage performance at sub-10 μA reverse bias, specified thermal resistance of 500 K/W on FR4 PCB, and intentional leakage optimization for noise-sensitive voltage reference circuits.

Technical Context

This Zener diode operates in reverse breakdown mode with a nominal working voltage of 2.4 V at I_Z = 50 μA, exhibiting a temperature coefficient of −3.5 mV/K and diode capacitance of 200 pF at VR = 0 V and f = 1 MHz. Its differential resistance remains ≤200 Ω up to 5 mA, enabling stable regulation under light-load conditions.

The device uses silicon planar epitaxial construction and is optimized for low-bias operation: reverse current is limited to 2.0 μA at VR = 1.0 V, and forward voltage is capped at 0.9 V at IF = 10 mA. The SOD882 package supports reflow soldering per JEDEC J-STD-020 with defined thermal pad layout and 0.5 mm profile.

Key Specifications

Pinout & Package

Package: SOD882 (DFN1006-2), leadless ultra-small surface-mount plastic package measuring 1.0 × 0.6 × 0.5 mm; cathode indicated by marking bar on top surface.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener regulation applications.

Compared with BZX8850-B2V4YL, BZX84-C2V4 trades precision and miniaturization for cost and power headroom, while MMSZ4685 prioritizes thermal robustness over low-noise performance - making the BZX8850-B2V4YL uniquely suited for space- and noise-constrained portable instrumentation.

Availability

BZX8850-B2V4YL is available at Aetrix Electronics and suitable for portable sensor biasing, low-power ADC reference generation, RTC backup voltage clamping, and microcontroller reset threshold setting requiring stable component supply across high-mix, low-volume production runs.

Supply support for BZX8850-B2V4YL 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, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.

The BZX8850 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for battery-powered and space-constrained applications demanding tight voltage tolerance, ultra-small packaging, and low-bias operational integrity.

FAQ

What is the maximum continuous reverse power dissipation for BZX8850-B2V4YL?

The maximum continuous total power dissipation is 250 mW at ambient temperature ≤25 °C when mounted on a standard FR4 PCB with single-sided copper and tin plating. Derating is required above 25 °C at 2.0 mW/°C based on thermal resistance of 500 K/W.

Does BZX8850-B2V4YL support reflow soldering, and what profile should be used?

Yes, it is qualified for lead-free reflow soldering per JEDEC J-STD-020. Use the DFN1006-2 footprint shown in Figure 10 with peak temperature ≤260 °C, time above 217 °C ≤60 seconds, and ramp rate ≤3 °C/s. Thermal pad exposure must match the 0.3 mm × 0.9 mm dimensions.

How does the "intentional minor rise of leakage current" benefit circuit design?

Per Application Note AN90031, this controlled leakage improves high-frequency noise suppression in reference paths by reducing parasitic oscillation and enhancing transient response - verified in precision ADC and oscillator bias applications where standard Zeners exhibit elevated broadband noise.

Can BZX8850-B2V4YL be used in forward conduction mode?

Yes, it functions as a standard silicon diode in forward bias with VF ≤0.9 V at 10 mA. However, its primary design intent is reverse-bias Zener regulation; forward use is limited to clamping or protection roles where its 200 mA absolute maximum forward current and 0.9 V VF are acceptable trade-offs.