Nexperia USA Inc. BZX84J-B3V3,115

Overview

BZX84J-B3V3,115 from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323F (SC-90) package, rated for 3.3 V nominal regulation at 5 mA test current, with 550 mW total power dissipation and AEC-Q101 qualification for automotive use.

For engineers reviewing the BZX84J-B3V3,115 datasheet, BZX84J-B3V3,115 pinout, BZX84J-B3V3,115 application, or BZX84J-B3V3,115 equivalent, this device serves as a precision low-voltage reference and overvoltage clamp in space-constrained automotive and industrial power rails where thermal stability and surge robustness are critical.

Technical Context

This Zener diode operates in reverse breakdown to maintain stable 3.3 V output across load and line variations, with differential resistance of 500 Ω at 5 mA and temperature coefficient of −3.5 mV/K - enabling predictable drift compensation in bias networks. Its low 1.1 V forward voltage at 100 mA supports dual-role use in protection and level-shifting circuits.

Designed for surface-mount reliability, it withstands non-repetitive peak reverse power up to 100 W (≤6.8 V types) under 100 μs square-wave surges at T_j = 25 °C, and features 230 K/W junction-to-ambient thermal resistance on standard FR4 PCBs.

Key Specifications

Pinout & Package

Package: SOD323F (SC-90), ultra-small flat-lead surface-mount plastic package with 2 terminals, 1.35 mm × 0.80 mm footprint and 0.25 mm profile - optimized for high-density routing and automated placement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84J-B3V3,115, the BZX84-C3V3,115 trades regulation accuracy for cost, while MMSZ4685T1G sacrifices board space efficiency for marginally improved surge endurance - making the BZX84J-B3V3,115 optimal for AEC-Q101-compliant, space-constrained 3.3 V reference designs.

Availability

BZX84J-B3V3,115 is available at Aetrix Electronics and suitable for automotive sensor biasing, USB-C power rail clamping, and industrial PLC input protection requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BZX84J-B3V3,115 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 technologies.

The BZX84J series belongs to Nexperia's AEC-Q101-qualified Zener diode product line, engineered specifically for precision voltage regulation and transient suppression in harsh automotive and industrial environments.

FAQ

What is the maximum continuous reverse current the BZX84J-B3V3,115 can sustain at 3.3 V?

The device is rated for 250 mA maximum forward current, but as a Zener diode, its continuous reverse current is limited by power dissipation. At 3.3 V, the absolute maximum DC reverse current is 167 mA (550 mW ÷ 3.3 V), assuming ambient temperature ≤25 °C and no additional thermal derating. Real-world operation must account for PCB thermal resistance and ambient rise.

Does the BZX84J-B3V3,115 support reflow soldering only, or can it be hand-soldered?

Nexperia specifies reflow soldering as the only recommended method due to the SOD323F package's thermal sensitivity and fine pitch. Hand-soldering risks thermal damage to the die or delamination; if unavoidable, use a temperature-controlled iron (<350 °C tip), contact time <3 seconds per terminal, and preheating to 100 °C to minimize thermal shock.

How does the −3.5 mV/K temperature coefficient impact regulation accuracy over −40 °C to +125 °C?

Over that 165 K range, the Zener voltage shifts by approximately −578 mV (−3.5 mV/K × 165 K), resulting in a 3.3 V nominal device drifting from ~3.88 V at −40 °C to ~2.72 V at +125 °C. This behavior is predictable and usable in compensated designs, but not suitable for unadjusted high-precision references.

Is the 100 W non-repetitive peak power rating applicable at elevated junction temperatures?

No - the 100 W rating applies only when T_j = 25 °C prior to surge. At higher initial junction temperatures, the allowable P_ZSM decreases significantly; Figure 1 in the datasheet shows derating to ~25 W at T_j = 125 °C for 100 µs pulses. System-level thermal design must ensure adequate cooling before transient events.