Nexperia USA Inc. BZT52-C3V3X

Overview

BZT52-C3V3X from Nexperia is a ±5 % tolerance Zener diode in SOD123 package, rated for 3.3 V nominal regulation at 5 mA, with 500 Ω max differential resistance and 5 μA max reverse current at 1 V, used for low-power voltage reference and overvoltage protection in consumer power rails.

For engineers reviewing the BZT52-C3V3X datasheet, BZT52-C3V3X pinout, BZT52-C3V3X application, or BZT52-C3V3X equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (210 K/W junction-to-solder-point), forward voltage ≤0.9 V at 10 mA, total power dissipation of 590 mW at 25 °C ambient, and SOD123 footprint compatibility with IPC-7351B reflow guidelines.

Technical Context

This device operates as a two-terminal voltage reference by maintaining stable reverse breakdown at 3.3 V under regulated current conditions. Its ±5 % tolerance (C-series) targets cost-sensitive applications where tight regulation is secondary to reliability and footprint efficiency.

Designed for surface-mount use on FR4 PCBs with single-sided copper, it exhibits 210 K/W junction-to-solder-point thermal resistance and supports non-repetitive peak reverse power up to 40 W for surge suppression when mounted with 1 cm² cathode pad.

Key Specifications

Pinout & Package

SOD123 plastic surface-mounted package: 2-pin, flat lead, cathode marked by bar; dimensions 2.80 mm × 1.70 mm × 1.30 mm (L × W × H), compatible with IPC-7351B standard footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZT52-C3V3X, MMBZ5226BS-7-F trades thermal performance for higher assembly yield in pick-and-place, while BZX384-C3V3 sacrifices 49 % power capacity for 35 % smaller footprint-neither offers drop-in replacement without layout or thermal redesign.

Availability

BZT52-C3V3X is available at Aetrix Electronics and suitable for USB power management, microcontroller reset generation, IoT sensor biasing, and LED driver reference applications requiring stable component supply and long-term obsolescence support.

Supply support for BZT52-C3V3X 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 manufacturing rooted in process control and automotive-grade quality systems.

The BZT52 series belongs to Nexperia's general-purpose Zener diode product line, engineered for cost-efficient voltage regulation and overvoltage protection in consumer, industrial, and computing power supplies.

FAQ

What is the maximum continuous reverse current the BZT52-C3V3X can sustain without degradation?

The device is rated for 250 mA maximum forward current, but its Zener operation relies on controlled reverse bias. At 3.3 V regulation, sustained reverse current must remain within 590 mW / 3.3 V ≈ 179 mA to avoid exceeding total power dissipation at 25 °C ambient. Derating is required above 25 °C per the 210 K/W junction-to-solder-point thermal resistance.

Does the BZT52-C3V3X meet automotive qualification standards?

No. Per Nexperia's revision history (Rev. 2, October 2025), C-series BZT52 devices are explicitly designated as non-automotive qualified. They lack AEC-Q200 stress testing and are not approved for safety-critical vehicle subsystems. Automotive alternatives require the -Q suffix (e.g., BZT52-C3V3-Q).

How does the 5 μA reverse current specification impact low-power design?

At 1 V reverse bias, the 5 μA max IR ensures minimal standby leakage-critical for battery-operated devices. For example, in a 3.3 V rail with 1 MΩ pull-up, this leakage contributes <5.3 nW of static power, preserving multi-year shelf life in coin-cell-powered sensors without compromising regulation accuracy.

Can the SOD123 package be hand-soldered using hot-air rework?

Yes, but with strict adherence to Nexperia's reflow profile: peak temperature ≤260 °C for ≤10 seconds, ramp rate ≤3 °C/s, and cooling rate ≤6 °C/s. Hand-soldering requires preheating the PCB to 100–120 °C and using fine-tip tweezers to avoid mechanical stress on the 0.25 mm lead thickness and 0.10 mm solder joint height.