Nexperia USA Inc. BZX8850-C4V7YL

Overview

BZX8850-C4V7YL from Nexperia is a low-current Zener diode in SOD882 (DFN1006-2) package, designed for precision voltage regulation at 4.7 V nominal with ±5 % tolerance. It delivers stable reference voltage at 50 µA test current, exhibits 3.0 Ω differential resistance at 5 mA, and maintains 140 pF capacitance at 0 V reverse bias - ideal for low-power sensor biasing and portable voltage monitoring circuits.

For engineers reviewing the BZX8850-C4V7YL datasheet, BZX8850-C4V7YL pinout, BZX8850-C4V7YL application, or BZX8850-C4V7YL equivalent, this device serves as a compact, low-leakage voltage reference in space-constrained battery-powered systems where minimal quiescent current and fast transient response are critical selection criteria.

Technical Context

This Zener operates in reverse breakdown mode with a specified 4.7 V nominal working voltage at I_Z = 50 µA, optimized for low-bias applications. Its intentional minor leakage rise improves switching speed and reduces noise per AN90031, distinguishing it from standard Zeners.

The device features a temperature coefficient of −2.7 mV/K and thermal resistance of 500 K/W (junction-to-ambient), enabling predictable drift behavior in ambient temperatures from −55 °C to +150 °C while dissipating up to 250 mW on FR4 PCB.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX8850-C4V7YL, the BZX8850-B4V7 offers tighter tolerance but higher impedance, while MMSZ4705T1G provides lower impedance in a larger package - making the C-series optimal for ultra-compact, low-leakage, moderate-precision reference needs.

Availability

BZX8850-C4V7YL is available at Aetrix Electronics and suitable for portable sensor biasing, low-power microcontroller reset monitoring, and USB-C power negotiation requiring stable component supply across high-mix, low-volume production runs.

Supply support for BZX8850-C4V7YL 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 leading semiconductor manufacturer headquartered in Nijmegen, Netherlands, specializing in high-performance, energy-efficient logic, analog, and discrete components for consumer, industrial, and automotive markets.

The BZX8850 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for space-constrained, battery-sensitive applications demanding stable voltage references with minimal quiescent current and optimized noise performance.

FAQ

What is the maximum continuous power dissipation for BZX8850-C4V7YL?

The BZX8850-C4V7YL has a total power dissipation limit of 250 mW at ambient temperature ≤ 25 °C when mounted on a standard FR4 PCB with single-sided copper. Derating is required above 25 °C per the 500 K/W junction-to-ambient thermal resistance, reaching zero dissipation at 150 °C ambient.

How does the "C" suffix differ from "B" in the BZX8850 series?

The "C" suffix denotes ±5 % tolerance and optimized leakage characteristics per AN90031, whereas "B" indicates ±2 % tolerance and standard leakage. The C-series uses intentional minor leakage rise to improve switching speed and reduce noise - confirmed in Table 8 electrical characteristics and Section 2 features.

Can BZX8850-C4V7YL be used in forward conduction mode?

Yes - its forward voltage is specified at 0.9 V @ 10 mA, making it usable as a low-drop rectifier or clamp in forward bias. However, its primary design intent and characterization are for reverse-biased Zener regulation; forward parameters are secondary and not guaranteed beyond the stated test condition.

Is the SOD882 package compatible with standard reflow soldering profiles?

Yes - Nexperia provides a dedicated reflow soldering footprint (Fig. 10) and qualifies the SOD882 package for JEDEC J-STD-020-compliant reflow. Peak temperature must not exceed 260 °C, and thermal profile must respect the 500 K/W thermal resistance to avoid junction overheating during assembly.