Nexperia USA Inc. BZT52H-A3V6X

Overview

BZT52H-A3V6X from Nexperia is a ±1 % tolerance Zener diode in SOD123F package, rated for 3.6 V nominal breakdown voltage at 5 mA, with 830 mW total power dissipation and 95 Ω maximum differential resistance - used for precision voltage reference and low-power regulation in power supply feedback paths and sensor biasing circuits.

For engineers reviewing the BZT52H-A3V6X datasheet, BZT52H-A3V6X pinout, BZT52H-A3V6X application, or BZT52H-A3V6X equivalent, key selection criteria include Zener voltage tolerance (±1 %), thermal resistance (150 K/W junction-to-solder-point), reverse current ≤5 μA at 1 V, forward voltage ≤0.9 V at 10 mA, and SOD123F footprint compatibility with automated reflow assembly.

Technical Context

This Zener diode operates in reverse-biased breakdown mode to maintain stable voltage across its terminals under varying load or input conditions. Its ±1 % tolerance and low 95 Ω dynamic impedance ensure tight regulation accuracy at I_Z = 5 mA, while the 3.6 V nominal Zener voltage places it in the low-voltage reference range suitable for 3.3 V system rail monitoring.

Thermal design is constrained by R_th(j-sp) = 150 K/W and T_j max = 150 °C, requiring adequate copper pad area (1 cm² cathode pad) to sustain 830 mW dissipation at ambient ≤25 °C. The device exhibits a negative temperature coefficient of −3.5 mV/K, minimizing drift over temperature in compensated circuits.

Key Specifications

Pinout & Package

SOD123F surface-mount plastic package: 2-terminal, flat lead, 3.4–3.6 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 MMBZ5226BS-7-F and BZX84-C3V6, BZT52H-A3V6X delivers superior regulation accuracy (±1 % vs. ±5 %), higher power handling (830 mW vs. ≤350 mW), and lower dynamic impedance - making it the preferred choice for precision 3.3 V system references where thermal margin permits SOD123F mounting.

Availability

BZT52H-A3V6X is available at Aetrix Electronics and suitable for power supply feedback reference, sensor biasing, overvoltage clamp protection, and microcontroller reset circuit applications requiring stable component supply with guaranteed long-term sourcing.

Supply support for BZT52H-A3V6X 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 essential efficiency technologies, delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.

The BZT52H series belongs to Nexperia's general-purpose Zener diode product line, engineered for precision voltage regulation and stabilization in compact SMD designs where accuracy, thermal performance, and manufacturability are critical.

FAQ

What is the maximum continuous reverse current the BZT52H-A3V6X can handle at 3.6 V?

The BZT52H-A3V6X is not rated for continuous reverse current at its Zener voltage - it operates in controlled breakdown. At V_Z = 3.6 V and I_Z = 5 mA, power dissipation is 18 mW. Maximum continuous DC current is limited by P_tot = 830 mW, yielding ~230 mA theoretical upper bound, but practical operation stays within 5–20 mA for stability and thermal safety per datasheet recommendations.

Can BZT52H-A3V6X be used in place of a 3.3 V Zener diode?

No - BZT52H-A3V6X has a nominal Zener voltage of 3.6 V (3.56–3.64 V), not 3.3 V. Using it as a 3.3 V reference would result in ~90 mV overvoltage, potentially violating downstream IC absolute maximum ratings. For 3.3 V regulation, select BZT52H-A3V3X (3.26–3.34 V) instead.

Is the SOD123F package compatible with standard reflow soldering profiles?

Yes - Nexperia specifies reflow soldering as the only recommended method for SOD123F. The package supports JEDEC J-STD-020-compliant profiles, with peak temperature up to 260 °C for ≤30 seconds. Footprint dimensions (2.9 × 1.6 mm land, 4.4 mm overall) are defined in Figure 12 of the datasheet for optimal wetting and mechanical reliability.

Does BZT52H-A3V6X meet automotive qualification standards?

No - per Revision 7 (January 2023) datasheet Section 13, BZT52H series devices are explicitly designated as non-automotive qualified. They lack AEC-Q101 stress testing and automotive-grade process controls. For automotive applications, Nexperia offers separate -Q qualified variants (e.g., BZT52H-A3V6X-Q), which must be selected and sourced independently.