Diodes Incorporated LZ52C10W

Overview

LZ52C10W from Diodes Incorporated is a surface-mount Zener diode with a nominal reverse breakdown voltage of 10 V (9.80–10.20 V), ±2% tolerance, 500 mW power dissipation, and ultra-small 1206 package-designed for precision voltage regulation in low-power analog circuits, power supply feedback loops, and overvoltage protection in consumer and industrial electronics.

For engineers reviewing the LZ52C10W datasheet, LZ52C10W pinout, LZ52C10W application, or LZ52C10W equivalent, key selection criteria include Zener voltage accuracy at 5 mA test current, low dynamic impedance (15 Ω @ I_ZT), minimal reverse leakage (<0.1 µA @ 7.5 V), thermal resistance (300 °C/W), and RoHS-compliant lead-free plating.

Technical Context

This Zener diode operates in reverse-biased breakdown mode to maintain stable reference voltage under varying load and temperature conditions. It features silicon epitaxial planar construction, low-leakage performance, and is characterized with pulsed testing (t_P < 100 ms) to minimize self-heating effects.

The device delivers tight 2% V_Z tolerance across its operating range and exhibits low Zener impedance (15 Ω at 5 mA) and ultra-low reverse current (≤0.1 µA at 7.5 V), enabling high-accuracy regulation in space-constrained PCB layouts.

Key Specifications

Pinout & Package

Package: 1206 surface-mount ceramic-body Zener diode with cathode indicated by color band. Terminals are solderable, lead-free plated, and rated for reflow per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX584C10 and MMSZ5240B, LZ52C10W uniquely combines 500 mW rating, ±2% tolerance, and 1206 manufacturability-making it optimal for production-grade power management where accuracy, thermal headroom, and assembly yield are jointly prioritized.

Availability

LZ52C10W is available at Aetrix Electronics and suitable for power supply feedback reference, overvoltage clamp protection, and low-power sensor biasing requiring stable component supply and full traceability.

Supply support for LZ52C10W 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

LZ52C10W belongs to the LZ52C series of surface-mount Zener diodes engineered for high-accuracy voltage regulation in compact, environmentally compliant power management and protection circuits.

FAQ

What is the maximum continuous reverse voltage that LZ52C10W can sustain without breakdown?

LZ52C10W is designed to operate in controlled Zener breakdown at its specified test current. Its rated reverse voltage is defined by its Zener voltage range (9.80–10.20 V at 5 mA). Sustained reverse voltage above 10.20 V will cause increasing current flow, limited only by external circuitry and thermal constraints-not by a fixed "maximum non-breakdown" value.

Does LZ52C10W require a series current-limiting resistor in all applications?

Yes-LZ52C10W must always be used with an external series resistor to limit current through the diode. Without current limiting, excessive power dissipation (>500 mW) will occur, leading to thermal runaway and permanent failure. Resistor value is calculated based on input voltage, desired Zener current, and load conditions.

Is LZ52C10W suitable for use in automotive applications?

LZ52C10W meets AEC-Q200 stress test guidelines for passive components and is rated for operation from –65 °C to +175 °C. While not AEC-Q101 qualified as a discrete semiconductor, its thermal and environmental specs support under-hood and infotainment subsystems where qualification flexibility is permitted by system-level validation.

How does the 1206 package affect thermal performance compared to smaller packages like SOD-123?

The 1206 package provides larger copper pad area and greater thermal mass than SOD-123, resulting in lower effective R_θJA (300 °C/W vs. ~400–500 °C/W typical for SOD-123). This allows higher steady-state power handling and improved reliability in thermally demanding environments without additional heatsinking.