Diodes Incorporated BZT52C15-7-F

Overview

BZT52C15-7-F from Diodes Incorporated is a surface-mount 15 V Zener diode in SOD123 package, rated for 500 mW power dissipation at TL = +75°C and 370 mW at TA = +25°C, with ±5% tolerance (13.8–15.6 V), 30 Ω typical Zener impedance at 5 mA, and 0.1 µA maximum reverse leakage at 10.5 V. It serves as a precision voltage reference or overvoltage clamp in low-power DC rails and sensor biasing circuits.

For engineers reviewing the BZT52C15-7-F datasheet, BZT52C15-7-F pinout, BZT52C15-7-F application, or BZT52C15-7-F equivalent, key selection criteria include its 15 V nominal Zener voltage, 30 Ω dynamic impedance, SOD123 thermal resistance (RθJA = 338 °C/W), AEC-Q101 qualification, and RoHS-compliant lead-free construction.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable voltage across load variations, with a temperature coefficient of +10.5 mV/°C - indicating positive drift above 5.1 V - and specified test current of 5 mA for Zener voltage validation. Its planar die construction ensures repeatable breakdown characteristics and low leakage.

The device uses a cathode-band polarity marking and is optimized for automated pick-and-place assembly on FR-4 PCBs with 1-inch copper pads. Thermal derating follows a linear curve from 500 mW at +75°C ambient down to zero at +150°C junction temperature.

Key Specifications

Pinout & Package

Package: SOD123 - surface-mount plastic case with matte tin-plated alloy 42 leadframe, UL 94V-0 flammability rating, and moisture sensitivity level 1 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5245B-7-F and 1N4744A, BZT52C15-7-F uniquely balances SMT compatibility, AEC-Q101 compliance, and 370 mW regulation capability - making it optimal for modern automotive and industrial PCBs where reliability, manufacturability, and thermal performance intersect.

Availability

BZT52C15-7-F is available at Aetrix Electronics and suitable for industrial sensor biasing, USB port overvoltage protection, and automotive lighting control requiring stable component supply, AEC-Q101 qualification, and RoHS-compliant manufacturing.

Supply support for BZT52C15-7-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 and manufacturing operations across Asia and the Americas.

The BZT52 series belongs to Diodes' general-purpose Zener diode product line, engineered for cost-effective, high-reliability voltage regulation and transient suppression in commercial and automotive applications.

FAQ

What is the maximum reverse voltage (V_R) that BZT52C15-7-F can withstand before breakdown?

The BZT52C15-7-F has a nominal Zener voltage of 15 V with a guaranteed range of 13.8 V to 15.6 V at 5 mA test current. Its reverse breakdown is designed to occur within this range; applying voltage below 13.8 V results in negligible current (<0.1 µA at 10.5 V), while exceeding 15.6 V initiates controlled conduction. It is not rated for blocking beyond its Zener specification.

Is BZT52C15-7-F suitable for use in automotive applications?

Yes - BZT52C15-7-F is qualified to AEC-Q101 standards, confirming its reliability for automotive electronics including engine control units, body control modules, and infotainment systems. Its operating temperature range (−65°C to +150°C), lead-free construction, and moisture sensitivity level 1 make it appropriate for under-hood and cabin environments.

How does the temperature coefficient affect BZT52C15-7-F's performance in precision reference circuits?

BZT52C15-7-F has a temperature coefficient of +10.5 mV/°C, meaning its Zener voltage increases linearly with temperature. In precision references, this drift must be compensated - for example, by pairing with a negative-TC component or using calibration algorithms. It is less stable than temperature-compensated references but sufficient for non-critical biasing where ±1% variation is acceptable.

Can BZT52C15-7-F replace BZT52C13-7-F in an existing design?

No - direct substitution is not recommended. BZT52C13-7-F has a 13 V nominal Zener voltage (12.4–14.1 V range) and different temperature coefficient (+9.2 mV/°C). Swapping introduces a ~2 V shift in regulation point and alters thermal drift behavior, potentially causing overvoltage or undervoltage in sensitive circuits unless feedback networks are recalculated.