Nexperia USA Inc. BZT52-C5V1X

Overview

BZT52-C5V1X from Nexperia is a Zener voltage regulator diode in SOD123 surface-mount package, designed for precision low-power voltage reference and clamping in biasing, protection, and regulation circuits. It delivers a nominal 5.1 V Zener voltage at 5 mA, ±5 % tolerance, 480 Ω max differential resistance, 2 μA max reverse current at 3 V, and operates across –55 °C to +150 °C ambient.

For engineers reviewing the BZT52-C5V1X datasheet, BZT52-C5V1X pinout, BZT52-C5V1X application, or BZT52-C5V1X equivalent, this page provides verified electrical parameters, thermal behavior, PCB mounting guidance, cathode/anode terminal mapping, and cross-series substitution insights for stable low-voltage reference design.

Technical Context

This Zener diode operates in reverse breakdown to maintain a stable 5.1 V reference under controlled current conditions (IZ = 5 mA), with temperature coefficient of –2.7 to +1.2 mV/K ensuring predictable drift over temperature. Its low 480 Ω differential resistance supports tight regulation in low-current feedback paths.

The device uses silicon planar epitaxial construction with cathode-marked SOD123 packaging optimized for reflow soldering on FR4 PCBs. Thermal resistance from junction to ambient is 350 K/W (free air) and 210 K/W (solder point), enabling reliable operation up to 150 °C junction temperature.

Key Specifications

Pinout & Package

SOD123 plastic surface-mount package: 2-terminal, flat lead, cathode marked by bar; dimensions: 3.75 mm × 1.7 mm × 1.3 mm (L × W × H); recommended reflow footprint per Figure 12.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZT52-C5V1X, BZT52-B5V1 offers tighter voltage control and lower impedance for critical references, while MMBZ5221BS trades higher impedance for SOT-23 compatibility-neither is pin-compatible nor electrically identical without circuit recalibration.

Availability

BZT52-C5V1X is available at Aetrix Electronics and suitable for voltage reference, overvoltage protection, and power supply feedback applications requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for BZT52-C5V1X 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, serving automotive, industrial, and consumer markets with scalable manufacturing and rigorous quality systems.

The BZT52 series targets general-purpose voltage regulation and protection in cost-sensitive, space-constrained applications, emphasizing robustness, wide voltage coverage (2.4–75 V), and SMD manufacturability.

FAQ

What is the maximum continuous reverse current the BZT52-C5V1X can handle?

The BZT52-C5V1X is rated for 250 mA maximum forward current (I_F), but its continuous reverse (Zener) current is limited by power dissipation: at 25 °C ambient, 590 mW / 5.1 V ≈ 116 mA maximum steady-state I_Z. Derating applies above 25 °C per thermal resistance data.

How does the temperature coefficient affect regulation accuracy over –40 °C to +125 °C?

With S_Z ranging from –2.7 to +1.2 mV/K at 5 mA, total V_Z drift over 165 K span is ≤ ±0.44 V - i.e., regulation shifts from ~4.66 V to ~5.54 V. For tighter accuracy, use lower-current bias or add compensation.

Can BZT52-C5V1X replace a 5.1 V Zener in a linear regulator feedback network?

Yes - its 4.8–5.4 V V_Z range, low r_dif, and stable temperature behavior make it suitable for TL431 or LM317 feedback dividers. Confirm that 590 mW dissipation margin accommodates expected I_Z × V_Z in your loop.

Is the SOD123 package compatible with standard reflow profiles for lead-free assembly?

Yes - Nexperia specifies reflow soldering only, with JEDEC J-STD-020-compliant profile. The SOD123 outline (Figure 11) and recommended footprint (Figure 12) ensure reliable wetting and mechanical integrity under IPC-A-610 Class 2/3 conditions.