Nexperia USA Inc. BZT52H-C4V3,115

Overview

BZT52H-C4V3,115 from Nexperia is a ±5 % tolerance Zener diode in SOD123F package, designed for precision voltage regulation at 4.3 V nominal breakdown voltage with 3 Ω typical differential resistance and ≤1 μA reverse leakage at 1 V. It delivers stable reference voltage in low-power analog circuits, power supply feedback loops, and overvoltage protection stages.

For engineers reviewing the BZT52H-C4V3,115 datasheet, BZT52H-C4V3,115 pinout, BZT52H-C4V3,115 application, or BZT52H-C4V3,115 equivalent, this part supports design validation of 4.3 V reference nodes, thermal-aware PCB layout for 830 mW dissipation, and selection among ±1 %/±2 %/±5 % tolerance variants within the BZT52H series.

Technical Context

This Zener diode operates in reverse-bias breakdown mode to maintain a stable 4.3 V reference across load variations, with temperature coefficient of −3.5 mV/K (typical) ensuring predictable drift over −65 °C to +150 °C ambient range. Its low 3 Ω differential resistance minimizes output impedance under 5 mA test current.

The device uses planar epitaxial construction for tight parameter control and reliability, mounted on FR4 PCB with 1 cm² cathode pad to sustain 830 mW total power dissipation at Tamb ≤ 25 °C. Thermal resistance from junction to solder point is 70 K/W, enabling effective heat transfer in compact SMD layouts.

Key Specifications

Pinout & Package

SOD123F is a 2-terminal surface-mount plastic package with cathode marked by a bar on the body. The device has no internal leads or substrate connections beyond the two external terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZT52H-C4V3,115, the BZT52H-B4V3 offers improved voltage accuracy at equal thermal performance, while the BZX384-C4V3 trades power capability and regulation quality for miniaturization-making each suitable only when their specific trade-offs align with system requirements.

Availability

BZT52H-C4V3,115 is available at Aetrix Electronics and suitable for power supply feedback references, overvoltage clamps, low-power sensor biasing, and reference voltage generators requiring stable component supply and long-term obsolescence management.

Supply support for BZT52H-C4V3,115 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 targets general-purpose voltage regulation in consumer, industrial, and computing applications, emphasizing manufacturability, thermal robustness, and parametric consistency across wide voltage and tolerance grades.

FAQ

What is the maximum continuous reverse current this Zener can handle at 4.3 V?

The BZT52H-C4V3,115 is rated for 5 mA test current (I_Z) per datasheet characterization, but its absolute maximum reverse current is limited by power dissipation: at 4.3 V, continuous I_Z must stay below 193 mA to avoid exceeding 830 mW (P = V × I). Derating is required above 25 °C ambient.

Can this diode be used in series with another Zener to achieve higher reference voltage?

Yes-stacking multiple BZT52H-C4V3,115 units in series yields additive Zener voltages (e.g., two in series ≈ 8.6 V), provided current remains within 5 mA per device and total power stays within thermal limits. Differential resistance adds linearly, increasing overall output impedance.

How does the −3.5 mV/K temperature coefficient affect regulation accuracy over temperature?

At 4.3 V nominal, a −3.5 mV/K coefficient causes ~0.53 V drift from −40 °C to +125 °C (165 K range), resulting in ~12.3 % relative change. This is acceptable for non-precision applications but requires compensation or tighter-tolerance variants for <1 % total error.

Is the SOD123F package compatible with standard reflow soldering profiles?

Yes-the SOD123F package is qualified for lead-free reflow per JEDEC J-STD-020, with peak temperature up to 260 °C. The recommended footprint (2.9 mm × 1.6 mm solder land, 1.1 mm pad width) ensures reliable wetting and mechanical strength without tombstoning.