Nexperia USA Inc. BZX84-A30,215

Overview

BZX84-A30,215 from Nexperia is a ±1 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 30 V nominal breakdown voltage at 2 mA, 250 mW total power dissipation, and 150 °C maximum junction temperature. It provides stable reference voltage in low-power linear regulators and overvoltage protection circuits for industrial sensor interfaces and microcontroller I/O conditioning.

For engineers reviewing the BZX84-A30,215 datasheet, BZX84-A30,215 pinout, BZX84-A30,215 application, or BZX84-A30,215 equivalent, key selection criteria include Zener voltage tolerance (±1 %), differential resistance (≤300 Ω at 2 mA), non-repetitive peak reverse current (1.0 A), thermal resistance (500 K/W junction-to-ambient), and SOT23 footprint compatibility with automated PCB assembly.

Technical Context

This device operates as a two-terminal shunt voltage reference, maintaining regulation by conducting reverse current when applied voltage exceeds its 30 V Zener threshold. Its ±1 % tolerance ensures tight voltage accuracy across production batches without trimming, and its 300 Ω typical differential resistance minimizes output voltage drift under varying load currents.

The SOT23 package enables high-density placement on compact PCBs while supporting reflow and wave soldering per IPC-J-STD-020/001. Thermal performance is defined for FR4 boards with single-sided 70 µm copper, delivering 500 K/W junction-to-ambient resistance - critical for ambient temperatures up to +150 °C in enclosed industrial enclosures.

Key Specifications

Pinout & Package

Package: SOT23 (TO-236AB), 3-lead surface-mount plastic package with 1.9 mm × 1.3 mm body, 0.95 mm height, and standard 0.95 mm lead pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-A30,215, MMBZ5260B offers higher power headroom but sacrifices voltage accuracy, while BZX84-C30 matches power and package but trades ±1 % precision for broader tolerance - making the A-grade optimal for closed-loop feedback and metrology-grade sensing.

Availability

BZX84-A30,215 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, microcontroller I/O protection, low-power linear regulator feedback, and power supply undervoltage detection requiring stable component supply across long-lifecycle embedded programs.

Supply support for BZX84-A30,215 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 discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.

The BZX84 series belongs to Nexperia's precision Zener diode product line, engineered specifically for stable voltage reference and overvoltage protection in space-constrained, thermally demanding industrial electronics.

FAQ

What is the maximum continuous reverse current for BZX84-A30,215 at 25 °C ambient?

The device is rated for 200 mA maximum forward current, but as a Zener diode, its continuous reverse current depends on power dissipation. At 25 °C ambient, with 250 mW total power limit and 30 V Zener voltage, the maximum continuous reverse current is 8.3 mA - calculated as P_tot/V_Z. Exceeding this requires thermal derating per the 500 K/W junction-to-ambient resistance.

Can BZX84-A30,215 be used in place of a 30 V Zener with ±5 % tolerance?

Yes, it can replace ±5 % Zeners in most applications, but only if tighter voltage control improves system performance. Its ±1 % tolerance yields a 29.7–30.3 V range versus 28.0–32.0 V for ±5 % parts - reducing worst-case error by 1.7 V. This matters in ADC references or comparator thresholds, but adds no benefit in simple overvoltage clamping where margin is already sufficient.

Is Pin 2 truly unused, or does it serve a mechanical function?

Pin 2 is electrically not connected (n.c.) per Nexperia's official pinning diagram and internal construction. It serves no electrical role and must remain unconnected on the PCB. Mechanically, it contributes to package rigidity and alignment during pick-and-place, but no thermal or electrical path exists through it - confirmed by thermal resistance measurements referencing only Pins 1 and 3.

How does the 150 °C junction temperature rating translate to real-world board-level operation?

With R_th(j-a) = 500 K/W and 250 mW power dissipation, self-heating raises junction temperature by 125 °C above ambient. So at 25 °C ambient, T_j reaches 150 °C - the absolute maximum. For reliable long-term operation, ambient should be limited to ≤40 °C (derated to ~110 °C T_j) or power reduced below 200 mW when ambient exceeds 25 °C, per the thermal derating curve in the datasheet.