Diodes Incorporated BZT52C9V1S-7-F

Overview

BZT52C9V1S-7-F 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), 200 mW power dissipation, and 15 Ω dynamic impedance at 5 mA test current. It operates in reverse-bias regulation mode for precision voltage reference and overvoltage protection in low-power analog and digital circuits.

For engineers reviewing the BZT52C9V1S-7-F datasheet, BZT52C9V1S-7-F pinout, BZT52C9V1S-7-F application, or BZT52C9V1S-7-F equivalent, key selection criteria include zener voltage accuracy, thermal resistance (625 °C/W), SOD323 package compatibility, low leakage (<0.2 µA at 7.0 V), and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This Zener diode uses planar die construction to ensure stable breakdown characteristics across temperature and lifetime. Its 9.1 V nominal zener voltage exhibits a +3.8 mV/°C temperature coefficient, enabling predictable drift compensation in reference designs.

The device is rated for 200 mW power dissipation on FR-4 PCB with recommended pad layout, and features a cathode band polarity marker. Reverse leakage remains ≤0.2 µA at VR = 7.0 V, supporting low-current biasing and sensing applications.

Key Specifications

Pinout & Package

Package: SOD323 - molded plastic case, UL 94V-0 flammability rating, matte tin-plated alloy 42 leadframe, cathode band marking, weight ≈ 0.0049 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5240BS-7-F and BZX384-C9V1, BZT52C9V1S-7-F offers tighter voltage tolerance (±5.5% vs. ±6–7%), lower leakage, and AEC-Q101 validation-making it optimal for automotive and high-stability analog reference designs where 9.1 V regulation fidelity is critical.

Availability

BZT52C9V1S-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, and consumer power adapter feedback circuits requiring stable component supply and long-term lifecycle support.

Supply support for BZT52C9V1S-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 BZT52C series belongs to Diodes' high-reliability Zener diode product line, engineered specifically for precision voltage regulation and overvoltage protection in space-constrained, thermally demanding environments such as automotive ECUs and industrial sensors.

FAQ

What is the maximum reverse leakage current for BZT52C9V1S-7-F at 7.0 V?

The maximum reverse leakage current is 0.2 µA at V_R = 7.0 V and T_A = +25°C, as specified in the Electrical Characteristics table. This value ensures minimal loading on high-impedance bias networks and supports accurate low-current reference applications.

Is BZT52C9V1S-7-F suitable for automotive applications?

Yes-BZT52C9V1S-7-F is AEC-Q101 qualified and rated for operation from -65°C to +150°C. Its construction, testing, and packaging meet automotive reliability requirements for use in body control modules, lighting drivers, and infotainment power supplies.

How does the +3.8 mV/°C temperature coefficient affect circuit performance?

The +3.8 mV/°C coefficient means the zener voltage increases by 3.8 mV per degree Celsius rise above 25°C. In a 9.1 V reference, this yields ~0.042% per °C drift-critical for systems operating across wide ambient ranges unless compensated via circuit topology or calibration.

Can BZT52C9V1S-7-F be used in place of a 9.0 V Zener diode?

No-BZT52C9V1S-7-F has a nominal 9.1 V zener voltage with 8.5–9.6 V range. Substituting for a true 9.0 V part may cause regulation errors exceeding ±1.1%, especially in temperature-sensitive or precision feedback applications where exact voltage setpoint matters.