Diodes Incorporated LZ52C8V2W

Overview

LZ52C8V2W from Diodes Incorporated is a surface-mount Zener diode with a nominal reverse breakdown voltage of 8.2 V, ±2% tolerance, 500 mW power dissipation, and ultra-low leakage current (≤0.1 µA at 6.2 V). It operates across –65 °C to +175 °C and is used for precision voltage regulation and overvoltage protection in compact DC power rails.

For engineers reviewing the LZ52C8V2W datasheet, LZ52C8V2W pinout, LZ52C8V2W application, or LZ52C8V2W equivalent, key selection factors include its 7 Ω dynamic impedance at 5 mA test current, 50 Ω knee impedance at 1 mA, 1206 package footprint compatibility, and RoHS-compliant lead-free plating with halogen/antimony-free "Green" molding compound.

Technical Context

This Zener diode employs silicon epitaxial planar construction to deliver stable reverse breakdown characteristics under pulsed conditions (t_P < 100 ms). Its low thermal resistance (300 °C/W) enables reliable operation at elevated ambient temperatures when mounted on standard PCB copper areas.

The device exhibits tight voltage tolerance (±2%), low forward voltage (1.5 V at 200 mA), and minimal junction capacitance-critical for noise-sensitive analog reference and feedback loop stabilization in LDOs and switching regulators.

Key Specifications

Pinout & Package

Package: 1206 surface-mount ceramic-body package with cathode indicated by color band; dimensions 3.2 mm × 1.6 mm × 1.0 mm (L × W × H); weight ≈10 mg.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C8V2 and MMSZ5238B, LZ52C8V2W delivers tighter tolerance, lower impedance, higher power, and extended temperature capability-making it optimal for industrial and automotive applications demanding long-term stability and thermal resilience.

Availability

LZ52C8V2W is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, USB-C power delivery clamp circuits, automotive body control module reset functions, and medical wearable battery monitor references requiring stable component supply across extended temperature ranges.

Supply support for LZ52C8V2W 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.

The LZ52C series belongs to Diodes' surface-mount Zener diode product line, engineered specifically for high-reliability voltage regulation and transient suppression in space-constrained, thermally demanding applications.

FAQ

What is the maximum continuous reverse voltage that LZ52C8V2W can withstand without breakdown?

LZ52C8V2W has a specified Zener voltage range of 8.04 V to 8.36 V at 5 mA test current. Its absolute maximum non-breakdown reverse voltage is not defined; instead, it begins controlled Zener conduction at the lower end of this range. For reliable shunt regulation, applied reverse voltage must exceed 8.04 V but remain within power limits to avoid thermal runaway.

Does LZ52C8V2W require external heat sinking in standard 1206 PCB layouts?

No external heat sink is required. At 25 °C ambient, the device dissipates up to 500 mW. With R_θJA = 300 °C/W, junction temperature rise is 150 °C at full power-still within its –65 °C to +175 °C operating range. Standard 1 oz. copper pads provide sufficient thermal relief for typical 1206 mounting.

Can LZ52C8V2W be used in forward-bias applications like standard rectifiers?

Yes-it exhibits 1.5 V forward voltage at 200 mA, consistent with silicon diode behavior. However, it is not optimized for rectification: its forward I-V curve lacks soft recovery characteristics, and its 1206 package is not rated for repetitive surge currents. Use only for low-duty-cycle bias or indicator functions-not primary AC/DC conversion.

Is LZ52C8V2W compliant with AEC-Q200 for automotive passive components?

No. While LZ52C8V2W operates from –65 °C to +175 °C and meets RoHS/halogen-free requirements, it is not qualified to AEC-Q200. Diodes offers the AZ series (e.g., AZ52C8V2W) for AEC-Q200-compliant automotive applications; LZ52C8V2W is intended for industrial and commercial use.