Diodes Incorporated BZT52C9V1-13

Overview

BZT52C9V1-13 from Diodes Incorporated is a surface-mount Zener diode with a nominal zener voltage of 9.1 V, ±5.5% tolerance (8.5–9.6 V), 500 mW power dissipation at TL = +75°C, 370 mW at TA = +25°C, and 15 Ω typical zener impedance at 5 mA test current. It operates across –65 °C to +150 °C and is used for precision voltage regulation in low-power analog circuits, overvoltage protection in sensor interfaces, and reference generation in industrial control modules.

For engineers reviewing the BZT52C9V1-13 datasheet, BZT52C9V1-13 pinout, BZT52C9V1-13 application, or BZT52C9V1-13 equivalent, key selection criteria include zener voltage accuracy at 5 mA, thermal resistance (RθJA = 338 °C/W), reverse leakage (<0.5 µA at 7.0 V), temperature coefficient (+3.8 mV/°C), and SOD123 package compatibility with automated PCB assembly.

Technical Context

This Zener diode uses planar die construction for stable breakdown characteristics and low dynamic impedance. Its cathode-band polarity and matte tin-plated alloy 42 leadframe ensure reliable solderability per MIL-STD-202 and RoHS compliance.

Designed for medium-current, general-purpose regulation, it delivers 9.1 V reference with <±5.5% tolerance at 5 mA, exhibits +3.8 mV/°C temperature coefficient, and maintains <0.5 µA reverse leakage at VR = 7.0 V - enabling stable operation in ambient temperatures up to +150 °C.

Key Specifications

Pinout & Package

Package: SOD123 - molded plastic case, UL 94V-0 rated, 0.010 g weight, 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 regulation applications.

Compared with MMBZ5240BS-7-F and 1N4739A, BZT52C9V1-13 uniquely balances SMT manufacturability, AEC-Q101 qualification, and 370 mW regulation capability in the compact SOD123 form factor - making it optimal for volume automotive and industrial PCBs where reliability and assembly yield are critical.

Availability

BZT52C9V1-13 is available at Aetrix Electronics and suitable for industrial sensor conditioning, automotive body control modules, and programmable logic controller input protection requiring stable component supply, consistent parametric performance, and full traceability.

Supply support for BZT52C9V1-13 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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.

The BZT52 series belongs to Diodes' general-purpose Zener diode product line, engineered specifically for cost-effective, high-reliability voltage regulation and protection in commercial and automotive applications - emphasizing AEC-Q101 qualification, green material compliance, and SMT process robustness.

FAQ

What is the maximum reverse voltage (VR) at which BZT52C9V1-13 guarantees IR ≤ 0.5 µA?

The datasheet specifies that reverse leakage current IR is ≤0.5 µA at VR = 7.0 V. This value is measured under standard test conditions (TA = +25°C) and reflects the device's ability to hold off voltage below its nominal zener breakdown point with minimal leakage - critical for low-power sensor bias networks.

Can BZT52C9V1-13 be used in place of a 9.1 V through-hole Zener like 1N4739A?

No - BZT52C9V1-13 is an SMD SOD123 device with different thermal characteristics (RθJA = 338 °C/W vs. ~50 °C/W for DO-41), lower power rating (370 mW vs. 1 W), and distinct mounting requirements. Substitution requires PCB redesign, thermal analysis, and validation of surge handling under real-world transients.

Does BZT52C9V1-13 meet AEC-Q101 for automotive under-hood applications?

Yes - the BZT52C9V1-13 is explicitly qualified to AEC-Q101 Rev D standards, including stress tests for temperature cycling, high-temperature reverse bias (HTRB), and accelerated humidity resistance. Its –65 °C to +150 °C operating range supports under-hood deployment in engine control and transmission modules.

How does the +3.8 mV/°C temperature coefficient affect regulation accuracy over temperature?

At +3.8 mV/°C, the zener voltage increases by approximately 19 mV over a 5°C rise. Over a 100°C span (–40 °C to +60 °C), total drift is ~380 mV - meaning VZ shifts from ~8.72 V to ~9.48 V. For high-accuracy references, this must be compensated via circuit design or paired with TC-matched components.