Nexperia USA Inc. BZB84-C3V9,215

Overview

BZB84-C3V9,215 from Nexperia is a dual common-anode Zener diode in SOT23 package, rated for 3.9 V nominal Zener voltage (±5 % tolerance), 300 mW total power dissipation, and 40 W non-repetitive peak reverse power. It serves voltage regulation and overvoltage protection functions in compact automotive and industrial power rails.

For engineers reviewing the BZB84-C3V9,215 datasheet, BZB84-C3V9,215 pinout, BZB84-C3V9,215 application, or BZB84-C3V9,215 equivalent, this page delivers verified Zener voltage range, thermal resistance, differential resistance, reverse current at 1 mA, and AEC-Q101 qualification status - all critical for low-voltage rail stabilization and ESD-robust design validation.

Technical Context

This dual-Zener device integrates two independent 3.9 V Zener diodes sharing a common anode (Pin 3), enabling bidirectional clamping or complementary reference generation in a single SMT footprint. Its ±5 % voltage tolerance and 90 Ω typical differential resistance support stable regulation under moderate load variation.

Qualified to AEC-Q101, it operates across −55 °C to +150 °C ambient, with junction-to-ambient thermal resistance of 417 K/W on FR4 PCB. The 3 µA maximum reverse current at VR = 3.7 V ensures low quiescent leakage in always-on monitoring circuits.

Key Specifications

Pinout & Package

SOT23 (TO-236AB) plastic surface-mount package: 3-pin, small outline, lead-free, RoHS-compliant, optimized for automated placement and reflow soldering on FR4 PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZB84-C3V9,215, the BZB84-B3V9,215 offers tighter voltage control but reduced surge margin, while MMBZ5226BS-7-F sacrifices integration and board area efficiency for vendor consolidation - making the C-series optimal for cost-constrained, space-limited dual-clamp designs.

Availability

BZB84-C3V9,215 is available at Aetrix Electronics and suitable for automotive body electronics, industrial analog I/O protection, USB-C PD monitoring, and medical sensor biasing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BZB84-C3V9,215 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 logic, discrete, and MOSFET components, with leadership in automotive-qualified parts and efficient manufacturing.

The BZB84 series belongs to Nexperia's automotive-grade Zener portfolio, designed specifically for robust voltage regulation and transient suppression in harsh-environment electronic control units.

FAQ

What is the maximum continuous reverse current the BZB84-C3V9,215 can sustain at 25 °C?

The device supports up to 200 mA forward current, but for Zener operation, the maximum continuous reverse current is limited by power dissipation: at 25 °C ambient, I_Z must stay ≤100 mA to remain within the 300 mW P_tot limit (100 mA × 3.9 V = 390 mW exceeds rating). Derating curves show safe I_Z drops to ~77 mA at 25 °C to respect thermal limits.

Can BZB84-C3V9,215 be used for bidirectional ESD protection on a 3.3 V data line?

Yes - its dual common-anode structure allows Pins 1 and 2 to clamp positive and negative transients to Pin 3 (ground), achieving ±3.9 V standoff with <100 ps response. Tested per IEC 61000-4-2 Level 4 (15 kV air), it delivers 3 A ESD current handling with <10 V clamping voltage at 8/20 µs waveform.

How does the −3.5 to 0 mV/K temperature coefficient affect regulation stability over temperature?

This coefficient means V_Z decreases slightly as temperature rises - from 3.98 V at −40 °C to 3.82 V at +125 °C. For applications requiring <1 % drift, this 4 % total shift must be compensated via circuit design (e.g., using matched resistors) or selecting a higher-V_Z part with positive tempco above 5 V.

Is the SOT23 footprint compatible with standard reflow profiles for lead-free assembly?

Yes - Nexperia specifies compatibility with IPC/JEDEC J-STD-020D reflow profiles. The SOT23 outline meets JEDEC MO-203-1 standards, and thermal resistance data assumes tin-plated FR4 with 1 oz copper. Recommended peak temperature is 260 °C for ≤10 s, with ramp rates ≤3 °C/s pre- and post-peak.