Diodes Incorporated BZT52HC8V2WF-7

Overview

BZT52HC8V2WF-7 from Diodes Incorporated is a surface-mount Zener diode with nominal 8.2 V zener voltage (7.7–8.7 V range), 5 mA test current, 10 Ω maximum zener impedance at I_ZT, and ±0.7 µA maximum reverse leakage at 5 V. Housed in SOD123F package, it delivers 375 mW power dissipation on standard FR-4 PCB and supports precision voltage regulation in automotive sensor biasing, industrial power supply feedback loops, and overvoltage protection circuits.

For engineers reviewing the BZT52HC8V2WF-7 datasheet, BZT52HC8V2WF-7 pinout, BZT52HC8V2WF-7 application, or BZT52HC8V2WF-7 equivalent, key selection criteria include its AEC-Q101 qualification, low-profile SOD123F footprint, tight 8.2 V tolerance, temperature coefficient of +3.2 to +6.2 mV/°C, and cathode-band polarity marking for unambiguous orientation during automated assembly.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its 10 Ω dynamic impedance at 5 mA ensures minimal output voltage deviation across current changes, while the +3.2 to +6.2 mV/°C positive temperature coefficient enables predictable drift compensation in multi-device reference networks.

The device is rated for −65 °C to +150 °C operating temperature and features a 150 °C/W thermal resistance when mounted with 1 cm² cathode pad - enabling reliable operation in under-hood automotive environments and thermally constrained industrial PCBs without forced cooling.

Key Specifications

Pinout & Package

Package: SOD123F (Type B), flat-lead, low-profile surface-mount package with cathode band marking. Dimensions: 1.80 mm × 2.70 mm × 1.15 mm (L × W × H); weight ≈ 0.015 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMSZ5238B-TP and BZX84-C8V2, BZT52HC8V2WF-7 uniquely combines AEC-Q101 qualification, SOD123F low-profile packaging, and 10 Ω impedance - making it the sole option for space-constrained, high-reliability automotive voltage reference designs.

Availability

BZT52HC8V2WF-7 is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLC analog input stages, and medical infusion pump power supplies requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for BZT52HC8V2WF-7 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.

This device belongs to the BZT52HC series of AEC-Q101-qualified Zener diodes, engineered specifically for high-reliability voltage regulation and transient suppression in automotive and industrial systems where thermal stability and long-term parametric consistency are critical.

FAQ

What is the maximum continuous power dissipation for BZT52HC8V2WF-7 on a standard FR-4 PCB?

The device dissipates up to 375 mW when mounted on FR-4 with Diodes Incorporated's minimum recommended pad layout. This rating assumes natural convection cooling and accounts for thermal resistance of 330 °C/W junction-to-ambient. Exceeding this limit risks parametric shift or catastrophic failure.

How does the +3.2 to +6.2 mV/°C temperature coefficient affect circuit performance?

This positive coefficient means the zener voltage increases linearly with temperature - approximately +0.5 V over a 100 °C rise. In precision references, it must be compensated using complementary TC resistors or matched diode pairs; in clamping applications, it provides predictable overvoltage margin expansion at elevated temperatures.

Is BZT52HC8V2WF-7 compatible with lead-free reflow profiles?

Yes - the device uses matte tin annealed terminals over copper alloy leadframe and is qualified for Pb-free soldering per JEDEC J-STD-020. Peak reflow temperature must not exceed 260 °C for ≤60 seconds, and moisture sensitivity level is rated Class 1 (unlimited floor life at ≤30 °C/60% RH).

Can BZT52HC8V2WF-7 be used in bidirectional TVS configurations?

No - it is a unidirectional Zener diode optimized for reverse-bias regulation. While forward conduction is specified (0.9 V @ 10 mA), it lacks the symmetric breakdown characteristics, low clamping voltage, and high surge current capability required for true bidirectional transient suppression per IEC 61000-4-2 or -4-5 standards.