Nexperia USA Inc. BZT52H-A6V8X

Overview

BZT52H-A6V8X from Nexperia is a precision Zener voltage regulator diode in SOD123F package, designed for low-power voltage reference and overvoltage protection in biasing, feedback, and clamp circuits. It delivers 6.8 V nominal Zener voltage at 5 mA, ±1 % tolerance, 80 Ω differential resistance, and operates up to 150 °C junction temperature - deployed in industrial power supply feedback loops and sensor signal conditioning stages.

For engineers reviewing the BZT52H-A6V8X datasheet, BZT52H-A6V8X pinout, BZT52H-A6V8X application, or BZT52H-A6V8X equivalent, key selection criteria include Zener voltage accuracy (±1 %), thermal stability (SZ = +1.2 mV/K at IZ = 5 mA), low dynamic impedance (80 Ω), SOD123F footprint compatibility, and non-automotive qualification status per Rev. 7 (Jan 2023).

Technical Context

This Zener diode operates in reverse breakdown mode with tightly controlled V_Z = 6.73–6.87 V at I_Z = 5 mA, exhibiting positive temperature coefficient (+1.2 mV/K) and low differential resistance (80 Ω max). Its design targets stable DC reference generation under low-current conditions (IZ = 1–5 mA) and transient clamping where fast response and minimal capacitance (200 pF at VR = 0 V) are critical.

The device uses silicon planar epitaxial construction, mounted on FR4 PCB with single-sided copper and tin-plated pads. Thermal resistance from junction to solder point is 70 K/W, enabling reliable operation at P_tot = 830 mW (T_amb ≤ 25 °C) and peak surge handling up to 6.0 A (100 μs pulse).

Key Specifications

Pinout & Package

SOD123F surface-mount plastic package: 2-terminal, flat lead, 3.4–3.6 mm length × 2.5–2.7 mm width × 0.9–1.2 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 voltage reference applications.

Compared with BZT52H-A6V8X, the BZT52H-B6V8 trades 1 % accuracy for cost reduction while retaining identical thermal and surge performance, whereas the BZX84-C6V8 sacrifices precision, power handling, and dynamic impedance for smaller footprint - making the A-grade part optimal for metrology-grade references.

Availability

BZT52H-A6V8X is available at Aetrix Electronics and suitable for industrial power supplies, microcontroller reset circuits, sensor excitation networks, and ESD protection clamps requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for BZT52H-A6V8X 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 solutions, headquartered in Nijmegen, Netherlands, with manufacturing in Asia and Europe.

The BZT52H series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for precision voltage regulation and clamping in cost-sensitive industrial and consumer electronics - emphasizing tight tolerances, robust surge capability, and SMD manufacturability.

FAQ

What is the maximum continuous power dissipation for BZT52H-A6V8X at 70 °C ambient?

At T_amb = 70 °C, derating applies per the thermal resistance R_th(j-a) = 330 K/W. With T_j(max) = 150 °C, allowable ΔT = 80 K, so P_tot = 80 K ÷ 330 K/W ≈ 242 mW. This is confirmed in Figure 1 of the datasheet, where 830 mW is valid only up to 25 °C ambient.

Does BZT52H-A6V8X meet automotive AEC-Q200 requirements?

No. Per Revision 7 (January 2023), this part is explicitly designated as non-automotive qualified. Nexperia states "Products changed to non-automotive qualification" and directs users to its -Q automotive alternatives for automotive applications - BZT52H-A6V8X lacks AEC-Q200 stress testing and qualification documentation.

How does the +1.2 mV/K temperature coefficient affect regulation accuracy over −40 to +85 °C?

Over a 125 K span, total V_Z drift = 125 K × 1.2 mV/K = 150 mV. Starting from nominal 6.80 V, this yields ±75 mV shift - resulting in effective V_Z range of 6.725–6.875 V at extremes. This is within the ±1 % initial tolerance band and confirms suitability for industrial-grade references.

Can BZT52H-A6V8X replace a 1N4734A in existing designs?

Yes, with caveats: both are 6.8 V Zeners, but BZT52H-A6V8X offers ±1 % tolerance (vs. ±5 % for 1N4734A), lower r_dif (80 Ω vs. 3.5 Ω typical), and SOD123F footprint (vs. DO-41). Layout redesign is required, and thermal performance differs due to package geometry - verify P_tot derating and PCB copper area per Nexperia's mounting guidelines.