Diodes Incorporated BZT52C13-13

Overview

BZT52C13-13 from Diodes Incorporated is a surface-mount 13 V Zener diode in SOD123 package, rated for 500 mW power dissipation at TL = +75°C and 370 mW at TA = +25°C, with ±4.8% zener voltage tolerance (12.4–14.1 V), 30 Ω maximum zener impedance at 5 mA, and 0.1 µA maximum reverse leakage at 10.4 V - used for precision voltage regulation and overvoltage protection in low-power analog circuits.

For engineers reviewing the BZT52C13-13 datasheet, BZT52C13-13 pinout, BZT52C13-13 application, or BZT52C13-13 equivalent, this page delivers verified electrical parameters, thermal derating behavior, SOD123 terminal polarity, and AEC-Q101-qualified alternatives for automotive and industrial power-rail stabilization designs.

Technical Context

This Zener diode operates in reverse breakdown mode with a nominal test current of 5 mA and exhibits a positive temperature coefficient of +7.0 mV/°C, enabling stable reference generation across -65°C to +150°C ambient range. Its planar die construction ensures consistent breakdown characteristics and low capacitance (≈10 pF at 1 V reverse bias).

The device uses a cathode-band polarity marking on the SOD123 body and is qualified to AEC-Q101 for high-reliability automotive applications. Thermal resistance junction-to-ambient is 338°C/W on FR-4 PCB with 1-inch copper pad, requiring careful layout for sustained 370 mW operation at room 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. Cathode identified by band marking on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMSZ5242B-7-F and BZX84-C13, BZT52C13-13 offers superior thermal derating (338°C/W vs. ~400°C/W), tighter Z_ZT control, and AEC-Q101 validation - making it the preferred choice for automotive-grade 13 V regulation where reliability and temperature margin are critical.

Availability

BZT52C13-13 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, consumer power adapter feedback loops, and medical diagnostic equipment bias supplies requiring stable component supply and full traceability.

Supply support for BZT52C13-13 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 BZT52 series targets general-purpose, medium-current Zener regulation in compact SOD123 packages, designed specifically for automated assembly and AEC-Q101-compliant automotive subsystems.

FAQ

What is the maximum continuous power dissipation for BZT52C13-13 at +75°C?

The BZT52C13-13 is rated for 500 mW power dissipation at lead temperature (T_L) = +75°C, as specified in the Absolute Maximum Ratings table. This value assumes direct thermal coupling to a PCB copper pour or heatsink; operation at ambient temperatures above +25°C requires linear derating per Figure 1, where power drops to zero at +150°C.

Does BZT52C13-13 have polarity marking, and how is it oriented on the PCB?

Yes - the BZT52C13-13 features a cathode band marking on the SOD123 package body. When mounted on PCB, the banded end connects to the higher-potential node (e.g., supply rail or signal input), while the unmarked end is the anode, tied to ground or lower-voltage reference. This orientation is mandatory for proper reverse-bias Zener operation.

Is BZT52C13-13 suitable for use in life support devices?

No - Diodes Incorporated explicitly prohibits use of BZT52C13-13 in life support devices or systems without prior written approval from its CEO. The device is not certified to ISO 13485 or IEC 62304, and lacks the fault-tolerant design, redundancy, or safety documentation required for implantable or critical-care applications.

How does the temperature coefficient affect regulation accuracy over temperature?

The BZT52C13-13 has a +7.0 mV/°C temperature coefficient, meaning its zener voltage increases by approximately 7 mV per degree Celsius rise in junction temperature. Over a -40°C to +125°C range, this contributes up to ±1.15 V drift - requiring system-level compensation or selection of tighter-tolerance variants if absolute voltage stability is critical.