Nexperia USA Inc. BZX8850-B5V1YL

Overview

BZX8850-B5V1YL from Nexperia is a low-current Zener diode in SOD882 (DFN1006-2) package, designed for precision voltage regulation at 5.1 V nominal with ±2 % tolerance. It delivers stable reference voltage at 50 µA test current, features 500 Ω differential resistance at 5 mA, and operates within −55 °C to +150 °C ambient range-ideal for battery-powered sensor biasing and low-power analog signal conditioning.

For engineers reviewing the BZX8850-B5V1YL datasheet, BZX8850-B5V1YL pinout, BZX8850-B5V1YL application, or BZX8850-B5V1YL equivalent, key selection criteria include its ultra-small 1.0 × 0.6 mm footprint, low leakage (<0.05 µA at VR = 5.1 V), 250 mW power rating on FR4 PCB, and intentional cathode marking for unambiguous orientation during automated placement.

Technical Context

This Zener diode operates in reverse breakdown mode with a specified working voltage of 5.00–5.20 V at IZ = 50 µA, exhibiting a temperature coefficient of −2.0 mV/K and junction-to-ambient thermal resistance of 500 K/W on standard FR4. Its differential resistance drops to 60 Ω at IZ = 5 mA, enabling stable regulation under light load variations.

The device uses silicon planar technology with controlled doping to achieve tight voltage tolerance and low capacitance (130 pF at VR = 0 V, f = 1 MHz). Its cathode-anode polarity is physically marked by a bar on the top surface, aligning with the SOD882 package's standardized terminal layout for reliable PCB assembly.

Key Specifications

Pinout & Package

SOD882 (DFN1006-2) is a leadless, ultra-small surface-mount package with two terminals on the bottom side and a cathode-marking bar visible on the top surface. The body measures 1.0 mm × 0.6 mm × 0.5 mm and requires reflow-compatible solder land pattern per Figure 10 of the datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX8850-B5V1YL, BZX84-C5V1 offers higher power but sacrifices precision and size, while MMSZ5231B provides greater thermal margin at the cost of PCB area and modern assembly compatibility-making the BZX8850-B5V1YL optimal for next-gen compact, battery-sensitive designs.

Availability

BZX8850-B5V1YL is available at Aetrix Electronics and suitable for portable sensor biasing, low-power ADC reference, USB-C power negotiation clamp, and IoT node reset circuitry requiring stable component supply across high-mix, low-volume production runs.

Supply support for BZX8850-B5V1YL 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 efficiency technologies, delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.

The BZX8850 series belongs to Nexperia's precision low-current Zener portfolio, engineered specifically for space- and power-constrained applications where ultra-small size, low leakage, and tight voltage tolerance are mandatory.

FAQ

What is the maximum reverse voltage this Zener can regulate continuously?

The BZX8850-B5V1YL is rated for continuous Zener operation up to 5.20 V (maximum specified VZ at IZ = 50 µA). Its absolute maximum reverse voltage is limited by the 250 mW power dissipation ceiling on FR4 PCB-exceeding 5.20 V at >48 µA risks thermal overload. Derating is required above 25 °C ambient per the 500 K/W Rth(j-a) value.

Does this part support reflow soldering, and what profile is recommended?

Yes, the SOD882 package is qualified for lead-free reflow soldering. Nexperia specifies a peak temperature of 260 °C for ≤ 30 seconds, with ramp-up rate ≤ 3 °C/s and ramp-down rate ≤ 6 °C/s. The recommended solder land pattern matches Figure 10 in the datasheet: 0.6 mm × 0.3 mm pads with 0.7 mm center-to-center spacing and 0.4 mm solder mask opening.

How does the B-series differ from C-series variants like BZX8850-C5V1?

The BZX8850-B5V1YL has ±2 % voltage tolerance and optimized leakage for fast switching, whereas the C-series (e.g., BZX8850-C5V1) offers ±5 % tolerance and lower leakage (<0.05 µA vs. ~0.1 µA). B-series is preferred for precision references; C-series suits cost-sensitive, high-volume applications where tighter regulation is unnecessary.

Can this Zener be used in forward conduction mode?

Yes-the BZX8850-B5V1YL exhibits a forward voltage of ≤0.9 V at 10 mA, making it usable as a low-drop rectifier or ESD clamp in bidirectional signal paths. However, its primary design intent and characterization are for reverse-bias Zener regulation; forward-mode performance is secondary and not guaranteed beyond the stated VF limit.