Diodes Incorporated BZT52HC24WFQ-7

Overview

BZT52HC24WFQ from Diodes Incorporated is an AEC-Q101 qualified surface-mount Zener diode with a nominal zener voltage of 24 V (22.8–25.6 V range), 30 Ω maximum zener impedance at 5 mA, and 375 mW power dissipation on standard FR-4 PCB. It features SOD123F packaging, cathode band polarity, and is designed for precision voltage regulation in automotive power supply rails and ECU reference circuits.

For engineers reviewing the BZT52HC24WFQ datasheet, BZT52HC24WFQ pinout, BZT52HC24WFQ application, or BZT52HC24WFQ equivalent, key selection criteria include its ±5% zener tolerance, low 0.05 µA reverse leakage at 16.8 V, -200 ppm/°C temperature coefficient, and IATF 16949-certified manufacturing for mission-critical automotive electronics.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable voltage under varying load and temperature conditions. Its 24 V nominal rating targets mid-range automotive subsystems requiring tighter regulation than generic 12 V or 48 V rails-such as sensor biasing, ADC reference stabilization, and overvoltage clamp protection in body control modules.

The device delivers 30 Ω dynamic impedance at 5 mA test current and exhibits a negative temperature coefficient of −200 ppm/°C, enabling predictable drift compensation in multi-device reference networks. Its SOD123F package supports thermal resistance of 330 °C/W (standard layout) or 150 °C/W (enhanced pad), directly impacting sustained power handling in compact PCB designs.

Key Specifications

Pinout & Package

Package: SOD123F - flat-lead, low-profile surface-mount package with matte tin-plated copper alloy leadframe; cathode identified by band marking; weight ≈ 0.015 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMSZ5245B-TP and BZX84-C24, BZT52HC24WFQ offers superior automotive compliance, higher power headroom (375 mW vs. 250 mW), and optimized SOD123F thermal performance-making it the preferred choice for under-hood applications demanding both reliability and thermal robustness.

Availability

BZT52HC24WFQ is available at Aetrix Electronics and suitable for automotive body control modules, engine control unit reference supplies, and ADAS camera power management requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BZT52HC24WFQ 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with design, manufacturing, and distribution operations across Asia, the Americas, and Europe.

This part belongs to the BZT52HC series of AEC-Q101 qualified Zener diodes engineered specifically for automotive voltage regulation, ESD protection, and reference stabilization in harsh-environment electronic control units.

FAQ

What is the maximum reverse voltage before breakdown for BZT52HC24WFQ?

The device exhibits a guaranteed zener voltage range of 22.8 V to 25.6 V at 5 mA test current. Breakdown begins within this window; operation below 22.8 V maintains high impedance (>100 MΩ), while voltages exceeding 25.6 V trigger full conduction with controlled dynamic impedance of ≤30 Ω.

Can BZT52HC24WFQ be used in parallel for higher power handling?

No-Zener diodes exhibit inherent parameter spread (±5% V_Z tolerance), causing current imbalance and thermal runaway when paralleled. For >375 mW requirements, use a single higher-power device like the 1 W SMBZ5245B or implement active regulation with a transistor-based shunt.

Does the SOD123F package require special soldering profiles?

Yes-the SOD123F's thin leadframe and green molding compound require adherence to J-STD-020 Level 1 moisture sensitivity guidelines. Reflow must follow Diodes' recommended profile: peak temperature ≤260°C, time above 217°C ≤60 seconds, and ramp rates within ±3°C/s to prevent delamination or voiding.

How does the −200 ppm/°C temperature coefficient affect system accuracy?

At 24 V nominal, this coefficient yields ≈−4.8 mV/°C drift. Over a −40°C to +125°C range (165°C span), total drift is ±0.792 V-within typical 24 V system tolerances. For tighter accuracy, pair with a positive-TC reference or use trimming resistors in feedback paths.