Diodes Incorporated BZT52C13-7

Overview

BZT52C13-7 from Diodes Incorporated is a surface-mount 13V Zener diode in SOD123 package, rated for 500mW power dissipation at TL=+75°C and 370mW at TA=+25°C, with ±4.1V zener voltage tolerance (12.4–14.1V), 30Ω max zener impedance at 5mA, and 0.1µA max reverse leakage at 11V. It serves as a precision voltage reference or overvoltage clamp in low-power analog and power-supply feedback circuits.

For engineers reviewing the BZT52C13-7 datasheet, BZT52C13-7 pinout, BZT52C13-7 application, or BZT52C13-7 equivalent, key selection factors include its 13V nominal zener voltage, SOD123 thermal resistance (RθJA = 338°C/W), AEC-Q101 qualification, RoHS/Green compliance, and cathode-band polarity marking for automated assembly.

Technical Context

This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under controlled current conditions. Its planar die construction ensures consistent breakdown characteristics, while the SOD123 package enables high-density PCB layouts and compatibility with reflow soldering profiles per J-STD-020 Level 1 moisture sensitivity.

The device exhibits a positive temperature coefficient of +7.0 mV/°C near 13V, enabling predictable drift compensation in temperature-sensitive references. Its 0.010g mass and matte tin-plated Alloy 42 leadframe support reliable solderability and mechanical robustness in automotive and industrial environments.

Key Specifications

Pinout & Package

Package: SOD123 - surface-mount plastic case (UL 94V-0), 1.55 mm width × 2.65 mm length × 3.65 mm height, cathode band marking, matte tin finish on Alloy 42 leadframe.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5243B-7-F and BZX84-C13, BZT52C13-7 offers superior thermal performance in SOD123, full AEC-Q101 compliance, and guaranteed green material content - making it the preferred choice for automotive and industrial-grade voltage regulation where long-term stability and regulatory alignment are critical.

Availability

BZT52C13-7 is available at Aetrix Electronics and suitable for automotive power management, industrial sensor conditioning, and consumer power supply feedback requiring stable component supply, consistent Zener voltage tolerance, and AEC-Q101 reliability assurance.

Supply support for BZT52C13-7 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 belongs to Diodes' general-purpose Zener diode product line, designed specifically for medium-current voltage regulation and clamping in cost-sensitive, high-volume applications demanding AEC-Q101 qualification and green compliance.

FAQ

What is the maximum continuous Zener current for BZT52C13-7 at +75°C ambient?

At TL = +75°C, the device supports 500mW power dissipation. With a nominal 13V zener voltage, this corresponds to a maximum continuous current of approximately 38.5 mA (500 mW ÷ 13 V). Derating must follow the curve in Figure 1 if ambient exceeds +25°C on standard FR-4 PCB.

Does BZT52C13-7 have polarity marking, and how is it identified?

Yes - the cathode is marked with a distinct band on the SOD123 body, located adjacent to the cathode terminal. This band aligns with the cathode end of the internal die and must be oriented toward the higher-potential node in reverse-bias operation to achieve proper Zener regulation.

Is BZT52C13-7 suitable for use in automotive ECUs?

Yes - it is qualified to AEC-Q101 standards and manufactured with halogen- and antimony-free "Green" materials. Its SOD123 package, 150°C maximum junction temperature, and tested reliability under temperature cycling and humidity bias make it appropriate for under-hood and cabin ECU applications.

How does the +7.0 mV/°C temperature coefficient affect circuit design?

This positive coefficient means the zener voltage increases by ~7 mV per degree Celsius rise in junction temperature. In precision references, designers compensate using negative-TC components (e.g., forward-biased diodes) or select complementary Zeners to achieve near-zero net drift across operating temperature ranges.