Nexperia USA Inc. BZX84-A15,215

Overview

BZX84-A15,215 from Nexperia is a ±1 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 15 V nominal breakdown voltage at 5 mA, 250 mW total power dissipation, and 75 Ω maximum differential resistance - used for precision voltage reference and overvoltage protection in low-power analog supply rails.

For engineers reviewing the BZX84-A15,215 datasheet, BZX84-A15,215 pinout, BZX84-A15,215 application, or BZX84-A15,215 equivalent, this page delivers verified electrical parameters, validated SOT23 terminal mapping, confirmed thermal derating behavior, and real-world regulation use cases - all grounded in Nexperia's Rev. 7 product data sheet.

Technical Context

This device operates as a two-terminal shunt regulator: reverse-biased to maintain stable output voltage across load variations. Its 15 V nominal Zener voltage is specified at I_Z = 5 mA with ±1 % tolerance, and exhibits a positive temperature coefficient of +9.2 mV/K at that current, enabling predictable drift compensation in bias networks.

Designed for surface-mount integration on FR4 PCBs with single-sided 70 µm copper, it supports non-repetitive surge handling up to 40 W (100 µs pulse) and maintains thermal resistance of 330 K/W from junction to solder point - critical for transient clamping in signal conditioning circuits.

Key Specifications

Pinout & Package

Package: SOT23 (TO-236AB), 3-lead surface-mount plastic package with standard footprint per Figure 12 (reflow) and Figure 13 (wave soldering); dimensions per Figure 11.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5245B and BZX84-C15, BZX84-A15,215 delivers superior voltage accuracy and lower dynamic impedance at identical power and footprint - making it the optimal choice for applications demanding stable 15 V references under varying load or temperature conditions.

Availability

BZX84-A15,215 is available at Aetrix Electronics and suitable for industrial sensor interfaces, low-power microcontroller reference circuits, USB-C overvoltage protection, and audio amplifier bias supply clamping requiring stable component supply and long-term sourcing continuity.

Supply support for BZX84-A15,215 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 and logic devices, with leadership in automotive-qualified and industrial-grade components.

The BZX84 series belongs to Nexperia's precision Zener regulator product line, engineered specifically for stable voltage reference and transient suppression in space-constrained, cost-sensitive consumer and industrial electronics.

FAQ

What is the maximum continuous reverse current the BZX84-A15,215 can sustain at 25 °C?

The device is rated for continuous forward current up to 200 mA, but as a Zener diode, its steady-state reverse current is defined by the regulation condition. At 15 V operation with 250 mW dissipation limit, the maximum sustainable Zener current is 16.7 mA - calculated as P_tot/V_Z. Exceeding this requires active thermal management or derating per Figure 1's thermal resistance curves.

Can BZX84-A15,215 replace BZX84-C15 in an existing design?

Yes, mechanically and electrically - same SOT23 package, pinout, and 15 V nominal rating - but functional substitution requires verification. BZX84-A15,215 offers ±1 % tolerance versus ±5 % for the C version, and 75 Ω vs. 100 Ω dynamic resistance. If the original design relies on worst-case 14.25 V to 15.75 V range, the tighter A-version may shift bias points or trip thresholds; revalidation is recommended.

How does the +9.2 mV/K temperature coefficient affect long-term stability?

This coefficient means the Zener voltage increases by 9.2 mV per Kelvin rise in junction temperature. Over a 100 °C range (−40 °C to +60 °C ambient, assuming ~30 °C self-heating), V_Z shifts by ~0.92 V - approximately 6.1 % of nominal value. For high-stability applications, this must be compensated via circuit topology (e.g., complementary tempcos) or calibrated out in software.

Is BZX84-A15,215 suitable for automotive applications?

No. Per Nexperia's Rev. 7 datasheet Section 13, this part is explicitly designated as non-automotive qualified. It lacks AEC-Q101 stress testing, automotive-grade process controls, and extended reliability validation. For automotive use, Nexperia offers the BZX84-Q series - which must be selected separately and verified against vehicle-level EMC and thermal requirements.