Nexperia USA Inc. BZX84-A10,215

Overview

BZX84-A10,215 from Nexperia is a ±1 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 10 V nominal breakdown voltage at 5 mA test current, 250 mW total power dissipation, and 150 °C maximum junction temperature. It provides precision voltage reference and overvoltage protection in low-power analog signal conditioning and power rail stabilization circuits.

For engineers reviewing the BZX84-A10,215 datasheet, BZX84-A10,215 pinout, BZX84-A10,215 application, or BZX84-A10,215 equivalent, key selection criteria include Zener voltage tolerance (±1 %), differential resistance (≤150 Ω at IZ = 5 mA), non-repetitive peak reverse current (3.0 A), temperature coefficient (±0.2 mV/K), and thermal resistance (330 K/W to solder point).

Technical Context

This discrete Zener diode operates in reverse-biased breakdown mode to maintain stable voltage across its terminals under varying load and supply conditions. Its 10 V nominal Zener voltage is specified at 5 mA test current with ±1 % tolerance, and it exhibits a low temperature coefficient of ±0.2 mV/K over 25–150 °C.

The device supports pulsed operation up to 40 W non-repetitive peak reverse power (100 μs, square wave), with forward voltage ≤0.9 V at 10 mA and reverse leakage <0.7 μA at VR = 9 V. Thermal design relies on Rth(j-sp) = 330 K/W to cathode solder point on standard FR4 PCB.

Key Specifications

Pinout & Package

SOT23 (TO-236AB) surface-mount plastic package with 3 leads, 1.9 mm × 1.1 mm footprint, 1.2 mm height, and tin-plated copper terminations compatible with reflow and wave soldering per IPC-J-STD-020/001.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-A10,215, MMBZ5240B offers higher power but sacrifices precision, while BZX84-C10 reduces cost at the expense of voltage accuracy-making the A-grade part optimal for untrimmed reference and tight-tolerance protection roles.

Availability

BZX84-A10,215 is available at Aetrix Electronics and suitable for voltage reference generation, overvoltage clamping, and signal level translation requiring stable component supply in industrial control, sensor interface, and embedded power management systems.

Supply support for BZX84-A10,215 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 delivering high-performance, reliable discrete, logic, and MOSFET devices optimized for efficiency and miniaturization in high-volume electronics.

The BZX84 series targets low-power voltage regulation and protection in space-constrained applications, emphasizing tight tolerances, robust surge handling, and compatibility with automated SMT assembly.

FAQ

What is the maximum continuous reverse current this Zener can handle at 25 °C ambient?

The BZX84-A10,215 is rated for 200 mA maximum forward current, but its continuous reverse (Zener) current is limited by power dissipation. At 25 °C ambient on standard FR4 PCB, 250 mW / 10 V = 25 mA maximum DC Zener current. Exceeding this risks thermal runaway due to positive temperature coefficient above ~5 V.

Can this diode be used in series to achieve higher regulated voltage?

Yes-multiple BZX84-A10,215 diodes may be connected in series to sum Zener voltages (e.g., two yield ~20 V). However, ensure identical current through all devices, account for cumulative tolerance (±1 % each), and verify thermal derating since power dissipation adds linearly while heat removal remains constrained by single-package limits.

Is the not-connected (n.c.) pin electrically isolated or thermally coupled?

Pin 2 is internally unconnected to the die and serves only as a mechanical support tab. It is electrically isolated but thermally coupled to the package body. Do not solder it to ground or any net; leaving it floating maintains specified thermal resistance (Rth(j-a) = 500 K/W) and avoids unintended parasitic paths.

How does the temperature coefficient affect regulation accuracy over −40 to +125 °C?

With SZ = ±0.2 mV/K at IZ = 5 mA, the worst-case voltage drift over 165 K range is ±33 mV (0.33 % of 10 V). Combined with ±1 % initial tolerance, total regulation uncertainty is ±1.33 % across temperature-suitable for non-critical references but insufficient for metrology-grade applications without compensation.