Diodes Incorporated BZT52C24TQ-7-F

Overview

BZT52C24TQ-7-F from Diodes Incorporated is a surface-mount Zener diode with nominal 24 V zener voltage (22.8–25.6 V range), 5 mA test current, 70 Ω maximum zener impedance at 1 kHz, 0.1 µA maximum reverse leakage at 18.4 V, and ±16.8 mV/°C temperature coefficient - used for precision voltage regulation and overvoltage protection in low-power analog and automotive control circuits.

For engineers reviewing the BZT52C24TQ-7-F datasheet, BZT52C24TQ-7-F pinout, BZT52C24TQ-7-F application, or BZT52C24TQ-7-F equivalent, this page delivers verified electrical parameters, SOD523 package layout, thermal derating behavior, cathode-band polarity marking, and direct-fit alternatives for voltage reference and clamp design.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its 24 V nominal zener voltage is specified at 5 mA test current, with 70 Ω dynamic impedance ensuring minimal output variation across operating current changes.

The device exhibits a +16.8 mV/°C temperature coefficient and is rated for −55 °C to +150 °C operation. Thermal resistance from junction to ambient is 417 °C/W on FR-4 board (2 oz copper, 1.92 mm² pad), limiting continuous power dissipation to 300 mW at 25 °C with linear derating above 25 °C.

Key Specifications

Pinout & Package

SOD523 is a two-terminal, surface-mount package with cathode identified by a visible band on the top surface. The device has no internal leads beyond the anode and cathode terminals; polarity must be observed during placement to ensure proper reverse-bias operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5249BS-7-F and BZX384-C24,115, BZT52C24TQ-7-F offers superior power handling (300 mW vs. ≤250 mW), lower dynamic impedance (70 Ω vs. ≥80 Ω), and identical leakage - making it optimal for thermally demanding or precision-clamp applications in automotive and medical systems.

Availability

BZT52C24TQ-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor transmitters, USB-C power delivery monitors, and medical diagnostic equipment requiring stable component supply with full traceability and AEC-Q101-compliant sourcing.

Supply support for BZT52C24TQ-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The BZT52 series belongs to Diodes' automotive-qualified Zener diode product line, engineered specifically for voltage regulation, transient suppression, and reference generation in harsh-environment applications including engine control, ADAS, and industrial automation.

FAQ

What is the maximum reverse voltage before breakdown for BZT52C24TQ-7-F?

The BZT52C24TQ-7-F begins controlled reverse breakdown at its nominal zener voltage of 24 V, with a guaranteed range of 22.8 V to 25.6 V at 5 mA test current. It does not conduct significantly below 22.8 V - reverse leakage remains ≤0.1 µA at 18.4 V, confirming sharp knee characteristics essential for reliable clamping.

Can BZT52C24TQ-7-F be used in place of a 24 V Zener in a 12 V automotive system?

Yes - the 24 V zener voltage is intentionally selected to remain well above normal 12 V system rails (13.5–14.8 V charging), enabling robust overvoltage protection during load dump events (up to 35 V). Its 300 mW rating and +16.8 mV/°C TC allow stable operation across the full −55 °C to +150 °C automotive temperature range.

Does BZT52C24TQ-7-F have AEC-Q200 qualification?

No - BZT52C24TQ-7-F is qualified to AEC-Q101 for discrete semiconductors, not AEC-Q200 (which applies to passive components). Its qualification includes stress testing per JESD22-A108, high-temperature operating life, and temperature cycling - all performed in IATF 16949-certified facilities, meeting automotive reliability requirements for active devices.

How does the SOD523 package affect thermal performance compared to SOD-123?

The SOD523 package has higher thermal resistance (417 °C/W junction-to-ambient) than SOD-123 (~200 °C/W), due to its smaller pad area (1.92 mm² vs. ~6 mm²) and reduced copper exposure. This limits continuous power dissipation to 300 mW at 25 °C, requiring careful thermal layout - such as increased copper pour or thermal vias - if operating near maximum ratings in enclosed environments.