Diodes Incorporated BZT52HC15WFQ-7

Overview

BZT52HC15WFQ from Diodes Incorporated is an AEC-Q101 qualified surface-mount Zener diode with nominal zener voltage 14.7 V (13.8–15.6 V range), 5 mA test current, and 15 Ω maximum zener impedance at 5 mA. It delivers 375 mW power dissipation on standard FR-4 PCB and operates across –65 °C to +150 °C for automotive voltage regulation and overvoltage protection.

For engineers reviewing the BZT52HC15WFQ datasheet, BZT52HC15WFQ pinout, BZT52HC15WFQ application, or BZT52HC15WFQ equivalent, key selection criteria include its SOD123F package footprint, cathode-band polarity marking, low 0.05 µA reverse leakage at 10.5 V, ±13.0 mV/°C temperature coefficient, and AEC-Q101 qualification for under-hood electronics.

Technical Context

This Zener diode functions as a precision voltage reference and clamp in low-power analog and digital supply rails. Its 14.7 V nominal breakdown voltage is stabilized by silicon junction design with controlled doping and thermal compensation, enabling stable regulation under varying ambient conditions.

The device uses a planar epitaxial construction with matte tin–annealed copper alloy leads and green molding compound (UL 94V-0). Its SOD123F package provides 150 °C/W thermal resistance when mounted with 1 cm² cathode pad, supporting reliable operation in thermally constrained automotive modules.

Key Specifications

Pinout & Package

Package: SOD123F - 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 diode applications.

Compared with MMSZ5245B-TP and BZX84-C15, BZT52HC15WFQ offers tighter voltage tolerance (±0.9 V vs ±1 V), lower impedance, and full automotive qualification-making it the sole choice for safety-critical vehicle subsystems requiring validated reliability and thermal robustness.

Availability

BZT52HC15WFQ is available at Aetrix Electronics and suitable for automotive engine control, body electronics, infotainment power management, and ADAS camera modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BZT52HC15WFQ 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 ICs, specializing in high-reliability components for automotive, industrial, and consumer markets with IATF 16949-certified facilities.

The BZT52HC series targets automotive-grade Zener regulation, designed specifically for AEC-Q101 compliance, low-profile mounting, and robust thermal performance in harsh-environment electronic control units.

FAQ

What is the maximum reverse voltage rating before breakdown for BZT52HC15WFQ?

The device exhibits a specified zener voltage range of 13.8 V to 15.6 V at 5 mA test current. Breakdown occurs within this range under controlled DC conditions; it is not rated for continuous operation above 15.6 V. The 10.5 V reverse voltage referenced in leakage specs is a measurement point-not a maximum rating.

Can BZT52HC15WFQ replace BZT52C15 in an existing design?

Yes, but with verification: both share SOD123F package and 15 V nominal rating, yet BZT52HC15WFQ adds AEC-Q101 qualification, tighter Z_ZT (15 Ω vs 30 Ω), and improved temperature coefficient. Layout compatibility is confirmed, but automotive qualification and lower impedance may require revalidation of transient response.

Does the SOD123F package support automated optical inspection (AOI)?

Yes-the flat-lead SOD123F package features consistent cathode band contrast and defined solderable terminations compatible with standard AOI systems. Its 0.81 mm minimum height and 1.80 mm length provide adequate feature resolution for fiducial-based alignment and solder-joint inspection in high-volume SMT lines.

What is the meaning of the 'WJ' marking code on the device body?

'WJ' is the manufacturer-specific type identification code for BZT52HC15WFQ, per Diodes Incorporated's marking scheme. It uniquely identifies the 14.7 V zener variant within the BZT52HC family and corresponds to the electrical characteristics table entry on page 2 of DS41143 Rev. 4–2.