Diodes Incorporated BZT52C24Q-7-F

Overview

BZT52C24Q-7-F from Diodes Incorporated is an automotive-grade surface-mount Zener diode with a nominal zener voltage of 24 V, ±5% tolerance (22.8–25.6 V), 500 mW power dissipation at TL = +75°C, and 370 mW at TA = +25°C. It features SOD123 package, matte tin-plated alloy 42 leadframe, and AEC-Q101 qualification - used for precision voltage regulation and overvoltage protection in automotive body control modules.

For engineers reviewing the BZT52C24Q-7-F datasheet, BZT52C24Q-7-F pinout, BZT52C24Q-7-F application, or BZT52C24Q-7-F equivalent, key selection criteria include zener voltage accuracy at 5 mA test current, low dynamic impedance (70 Ω @ 5 mA), temperature coefficient (+16.8 mV/°C), reverse leakage (<0.1 µA @ 18.4 V), and automotive qualification status.

Technical Context

This Zener diode operates in reverse breakdown to maintain stable reference voltage under varying load and temperature conditions. Its planar die construction ensures consistent breakdown characteristics, while the SOD123 package supports automated placement and reflow soldering in high-reliability automotive PCBs.

The device exhibits a positive temperature coefficient of +16.8 mV/°C and delivers regulated output across 0.1–70 mA zener current range. Thermal resistance junction-to-lead is 150 °C/W, enabling effective heat transfer to PCB copper pads during transient overvoltage events.

Key Specifications

Pinout & Package

The BZT52C24Q-7-F is housed in a SOD123 plastic package with matte tin-plated terminals and cathode band polarity marking. Weight is approximately 0.010 grams.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMSZ5249B-TP and BZX84-C24, BZT52C24Q-7-F offers superior thermal performance (R_θJA = 338 °C/W), tighter process control for automotive environments, and optimized SOD123 footprint for space-constrained BCM PCBs.

Availability

BZT52C24Q-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, and lighting control units requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for BZT52C24Q-7-F 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, specializing in high-reliability components for automotive, industrial, and computing markets.

The BZT52C series belongs to Diodes' automotive-qualified Zener diode product line, designed specifically for precision voltage regulation and transient suppression in harsh-environment vehicle electronics.

FAQ

What is the maximum reverse voltage this Zener can withstand before breakdown?

The BZT52C24Q-7-F has a nominal zener voltage of 24 V with a guaranteed range of 22.8 V to 25.6 V at 5 mA test current. Breakdown occurs within this range - it does not have a separate "maximum reverse voltage" rating beyond its specified V_Z tolerance band. Operation above 25.6 V risks exceeding power limits unless current is strictly limited by external series resistance.

Is this part suitable for use in a 24 V battery-powered system with load dump transients?

Yes - the BZT52C24Q-7-F is AEC-Q101 qualified and rated for operation from –65°C to +150°C. When paired with appropriate series current-limiting resistance, it clamps load dump transients up to ISO 7637-2 Pulse 5a (120 V, 400 ms) by conducting excess energy into ground, provided power dissipation remains within 500 mW derated curve limits.

How does the temperature coefficient affect regulation accuracy over temperature?

With a temperature coefficient of +16.8 mV/°C, the zener voltage increases linearly with junction temperature. From –40°C to +125°C (165°C delta), V_Z shifts by +2.77 V - resulting in a total regulation window of ~22.8 V to ~26.8 V. System-level compensation or tolerance budgeting must account for this drift in precision reference applications.

Can this diode replace a BZT52C24-7-F in an existing design?

Yes - the "Q" suffix denotes AEC-Q101 qualification, while the non-Q version is commercial grade. Electrically and physically identical (same SOD123 package, marking code WO, V_Z, I_ZT, Z_ZT), the Q variant adds automotive stress testing and traceability. No layout or schematic changes are needed for drop-in replacement in automotive designs.