Nexperia USA Inc. BZT52H-A5V1X

Overview

BZT52H-A5V1X from Nexperia is a ±1 % tolerance Zener diode in SOD123F package, rated for 5.1 V nominal breakdown voltage at 5 mA, 830 mW total power dissipation, and 480 Ω maximum differential resistance - used for precision voltage reference and overvoltage protection in low-power analog supply rails.

For engineers reviewing the BZT52H-A5V1X datasheet, BZT52H-A5V1X pinout, BZT52H-A5V1X application, or BZT52H-A5V1X equivalent, this page delivers verified Zener parameters, thermal performance under PCB-mount conditions, cathode/anode terminal mapping, and direct-fit alternatives with documented voltage tolerance and temperature coefficient differences.

Technical Context

This device operates as a two-terminal shunt regulator, maintaining stable reverse-biased conduction above its 5.1 V Zener voltage with low dynamic impedance (480 Ω max) and minimal temperature drift (−2.7 to +1.2 mV/K). It is designed for DC biasing, voltage clamping, and reference generation in space-constrained SMT layouts.

Its SOD123F footprint supports reflow-only assembly on FR4 PCBs with single-sided copper; thermal resistance from junction to ambient is 330 K/W (free air) and 150 K/W (to solder point), enabling reliable operation up to 150 °C junction temperature under defined mounting conditions.

Key Specifications

Pinout & Package

SOD123F surface-mount plastic package: 2.5–2.7 mm length × 1.5–1.7 mm width × 0.9–1.0 mm height; cathode marked by bar on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZT52H-A5V1X, BZT52C5V1 trades ±1 % accuracy for lower cost and wider availability, while MMSZ5231B offers superior power handling and lower impedance at the expense of tighter voltage control - selection depends on whether precision, surge robustness, or cost dominates the design constraint.

Availability

BZT52H-A5V1X is available at Aetrix Electronics and suitable for industrial sensor modules, programmable logic controller (PLC) I/O protection, and medical-grade power supply references requiring stable component supply and long-term lifecycle continuity.

Supply support for BZT52H-A5V1X 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 BZT52H series belongs to Nexperia's general-purpose Zener diode product line, engineered for precision voltage regulation and transient suppression in consumer, industrial, and communication equipment where SMT scalability and parametric consistency are critical.

FAQ

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

At T_amb = 25 °C with specified PCB mounting (1 cm² cathode pad), the device sustains up to 163 mA continuous reverse current - calculated from P_tot = 830 mW and V_Z ≈ 5.1 V. Derating is required above 25 °C per the 150 K/W R_th(j-sp) thermal resistance.

Does the SOD123F package support hand-soldering or require reflow only?

Reflow soldering is the only recommended method per Nexperia's documentation. The SOD123F outline and thermal mass are optimized for controlled ramp profiles; hand-soldering risks thermal damage due to localized overheating and insufficient cathode pad heat sinking.

How does the −2.7 to +1.2 mV/K temperature coefficient affect regulation stability over temperature?

This coefficient means V_Z shifts by up to ±0.13 V across a 100 °C range (e.g., −40 °C to +60 °C), resulting in <±2.6 % relative change. For applications needing <±0.1 % stability, external compensation or tighter-tolerance variants (e.g., BZT52H-B5V1) are advised.

Can this part replace older BZT52B5V1 designs without layout changes?

Yes - both share identical SOD123F package dimensions, pinout, and solder footprint. However, BZT52H-A5V1X improves tolerance (±1 % vs. ±2 %) and reduces differential resistance (480 Ω vs. 60 Ω), delivering tighter regulation but requiring verification of reduced power dissipation in existing thermal designs.