Nexperia USA Inc. BZT52H-A2V7X

Overview

BZT52H-A2V7X from Nexperia is a ±1 % tolerance Zener diode in SOD123F package, designed for precision voltage regulation and reference applications at 2.7 V nominal breakdown voltage with 500 Ω max differential resistance at I_Z = 5 mA and 830 mW total power dissipation at T_amb ≤ 25 °C. It serves as a stable shunt voltage reference in low-power analog circuits, power supply feedback paths, and overvoltage protection clamping stages.

For engineers reviewing the BZT52H-A2V7X datasheet, BZT52H-A2V7X pinout, BZT52H-A2V7X application, or BZT52H-A2V7X equivalent, key selection considerations include its tight ±1 % V_Z tolerance, low 500 Ω dynamic impedance, SOD123F footprint compatibility with high-density PCB layouts, and thermal performance validated on FR4 with 1 cm² cathode pad.

Technical Context

This Zener diode operates in reverse-biased breakdown mode to maintain a stable 2.7 V reference across load variations, with temperature coefficient of –3.5 to 0.0 mV/K and reverse current <20 μA at V_R = 1 V. Its design targets low-noise, low-drift DC biasing and voltage clamping where accuracy and thermal stability are critical.

The device uses planar epitaxial silicon construction with metallized cathode termination, enabling reliable operation up to 150 °C junction temperature and supporting non-repetitive surge currents up to 6.0 A (t_p = 100 μs). Its SOD123F package provides mechanical robustness and thermal path optimization via cathode-side solder pad.

Key Specifications

Pinout & Package

SOD123F is a surface-mount plastic package with two leads, 3.4–3.6 mm length, 1.5–1.7 mm width, and 0.55–0.70 mm height. Cathode marked by bar on body; anode unmarked end.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZT52H-A2V7X, BZT52C2V7 sacrifices accuracy and impedance for cost, while MMSZ4678T1G improves impedance at the expense of tolerance and qualification status-making the A2V7X optimal for precision industrial feedback and reference designs requiring traceable ±1 % performance.

Availability

BZT52H-A2V7X is available at Aetrix Electronics and suitable for power supply feedback, ADC reference voltage generation, overvoltage clamp, and logic-level protection requiring stable component supply with guaranteed long-term continuity and full traceability.

Supply support for BZT52H-A2V7X 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 advanced packaging and automotive-grade qualification.

The BZT52H series belongs to Nexperia's general-purpose Zener diode product line, engineered for precision voltage regulation in industrial, consumer, and computing applications where tight tolerance, low impedance, and thermal robustness are essential.

FAQ

What is the maximum continuous reverse current for BZT52H-A2V7X at 25 °C ambient?

The device does not specify a maximum continuous reverse current independent of power dissipation. At T_amb ≤ 25 °C, it supports up to 308 mA continuous Zener current (calculated as 830 mW ÷ 2.7 V), limited by thermal design and PCB layout. Derating is required above 25 °C per the 150 K/W R_th(j-a) value.

How does the marking code 'FU' correspond to BZT52H-A2V7X?

'FU' is the official top-side marking for BZT52H-A2V7X per Table 4 of the datasheet. It uniquely identifies the ±1 % tolerance variant with nominal 2.7 V Zener voltage within the BZT52H series, distinguishing it from 'DD' (±2 %) and 'B4' (±5 %) variants at the same voltage.

Can BZT52H-A2V7X be used in automotive applications?

No. Per Revision 7 (January 2023), this part is explicitly designated as non-automotive qualified. Nexperia states that automotive alternatives must be selected from their –Q qualified product line. Using BZT52H-A2V7X in automotive systems voids warranty and violates safety-critical design requirements.

What is the recommended reflow profile for SOD123F mounting?

Reflow soldering is the only recommended method. The footprint requires 1.2 mm × 1.1 mm solder pads (2×), 2.8 mm × 4.4 mm occupied area, and 1.6 mm solder land width per side. Peak temperature must not exceed 260 °C for ≤10 seconds, with ramp rates per JEDEC J-STD-020 for moisture sensitivity level 1.