Diodes Incorporated BZT52C15TQ-7-F

Overview

BZT52C15TQ-7-F from Diodes Incorporated is a surface-mount Zener diode with a nominal zener voltage of 15 V, ±8% tolerance (13.8–15.6 V), 300 mW power dissipation, 30 Ω dynamic impedance at 5 mA test current, and 0.1 µA maximum reverse leakage at 10.5 V. It serves as a precision voltage reference or overvoltage clamp in low-power analog and automotive signal conditioning circuits.

For engineers reviewing the BZT52C15TQ-7-F datasheet, BZT52C15TQ-7-F pinout, BZT52C15TQ-7-F application, or BZT52C15TQ-7-F equivalent, key selection criteria include zener voltage stability across temperature (±0.08%/°C TC), SOD523 package thermal resistance (417 °C/W), cathode-band polarity marking, and AEC-Q200-compatibility via Q-suffix qualification for automotive-grade reliability.

Technical Context

This device operates as a two-terminal voltage-regulating element relying on controlled reverse-biased avalanche breakdown. Its zener voltage is specified at I_ZT = 5 mA, with guaranteed minimum and maximum values (13.8 V / 15.6 V) ensuring predictable clamping behavior under defined bias conditions.

Thermal performance is defined for mounting on FR-4 PCB with 2 oz copper and 1.92 mm² pad area. Derating begins above +25°C ambient per Fig. 1, reaching zero power at +150°C, and it supports operation from –55°C to +150°C junction temperature.

Key Specifications

Pinout & Package

Two-terminal device in SOD523 package: anode and cathode terminals identified by a visible cathode band on the top surface. No internal leads or multi-pin configuration - polarity must be observed during placement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5245BS-7-F and BZX84-C15-7-F, BZT52C15TQ-7-F offers superior voltage tolerance control (±8% vs ±5% and ±6%), identical power rating, lowest profile (SOD523), and AEC-Q200-ready qualification-making it optimal for new automotive and space-constrained industrial designs.

Availability

BZT52C15TQ-7-F is available at Aetrix Electronics and suitable for automotive cabin electronics, industrial PLC analog modules, and consumer power adapter feedback circuits requiring stable component supply and AEC-Q200 traceability.

Supply support for BZT52C15TQ-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 applications in harsh-environment systems including engine control units, body electronics, and industrial automation.

FAQ

What is the maximum reverse voltage before breakdown for BZT52C15TQ-7-F?

The device exhibits controlled reverse breakdown at its nominal zener voltage of 15 V, with guaranteed minimum and maximum values of 13.8 V and 15.6 V respectively at 5 mA test current. Below 10.5 V, reverse leakage remains ≤0.1 µA - no hard "maximum reverse voltage" is defined outside this operating range, as the diode is intended for regulated breakdown operation, not blocking.

Is BZT52C15TQ-7-F qualified for automotive use?

Yes - the "Q" suffix denotes qualification to AEC-Q200 stress testing standards, and the part is manufactured in IATF 16949-certified facilities. It supports PPAP documentation and change control required for automotive production, as confirmed in Diodes' official automotive product listing and datasheet notes.

How does the SOD523 package affect thermal performance?

The SOD523 package delivers R_θJA = 417 °C/W when mounted on FR-4 with 2 oz copper and 1.92 mm² pad area. Its low profile and optimized leadframe reduce thermal path resistance versus smaller packages like SOD323, enabling sustained 300 mW operation up to +85°C ambient before derating applies.

Can BZT52C15TQ-7-F replace BZT52C15-7-F in existing designs?

Yes - BZT52C15TQ-7-F is the automotive-qualified (Q-suffix) version of BZT52C15-7-F, sharing identical electrical specifications, SOD523 package, and marking code "WJ". The only differences are enhanced process controls, lot traceability, and AEC-Q200 qualification - making it a drop-in replacement with improved reliability assurance for automotive and industrial applications.