Diodes Incorporated BZT585B8V2TQ-7

Overview

BZT585B8V2TQ-7 from Diodes Incorporated is a precision Zener diode with 8.2 V nominal breakdown voltage, ±2.0% tolerance, 10 Ω maximum Zener impedance at 5 mA, 350 mW power dissipation, and AEC-Q101 qualification for automotive voltage regulation and reference applications.

For engineers reviewing the BZT585B8V2TQ-7 datasheet, BZT585B8V2TQ-7 pinout, BZT585B8V2TQ-7 application, or BZT585B8V2TQ-7 equivalent, this device serves as a stable, low-profile voltage reference in power supply feedback loops, overvoltage protection circuits, and sensor biasing networks where tight voltage tolerance and thermal stability are required.

Technical Context

This Zener diode operates in reverse-biased breakdown mode to maintain a precise DC reference voltage across its terminals under varying load and temperature conditions. Its 4.7 mV/°C temperature coefficient ensures predictable drift behavior near room temperature, and its 150 pF capacitance at 1 MHz supports stable operation in moderate-frequency analog circuits.

The device uses a planar-diffused silicon junction fabricated in IATF16949-certified facilities and features a cathode band marking for unambiguous polarity identification. It delivers 0.7 µA maximum reverse leakage at 5 V, enabling low-power standby functionality in battery-sensitive systems.

Key Specifications

Pinout & Package

Package: SOD523 - ultra-compact, low-profile surface-mount package (1.25 mm × 0.85 mm × 0.60 mm) with matte tin–annealed Alloy 42 leadframe, rated for 357 °C/W junction-to-ambient thermal resistance on FR-4 PCB.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5231BS-7-F and BZX84-C8V2-7-F, the BZT585B8V2TQ-7 provides tighter voltage control, higher power margin, and certified automotive reliability-making it the sole choice for production-grade automotive and medical applications demanding traceable performance.

Availability

BZT585B8V2TQ-7 is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interfaces, consumer overvoltage protection, and medical wearable battery monitoring requiring stable component supply and full AEC-Q101 documentation.

Supply support for BZT585B8V2TQ-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 BZT585 series belongs to Diodes' precision Zener diode product line, engineered specifically for AEC-Q101-compliant voltage reference and regulation in harsh-environment electronics where long-term stability and process-controlled tolerances are critical.

FAQ

What is the maximum Zener test current for BZT585B8V2TQ-7?

The device is characterized at 5 mA Zener test current (I_ZT), where its 8.2 V nominal voltage and 10 Ω dynamic impedance are guaranteed. Operation beyond 5 mA requires derating per the power curve in Figure 1, with absolute maximum continuous current limited to 200 mA in forward bias and thermally constrained reverse bias.

Is BZT585B8V2TQ-7 compatible with lead-free reflow soldering profiles?

Yes - the device uses matte tin–annealed Alloy 42 leads and complies with J-STD-020 moisture sensitivity Level 1. It withstands peak reflow temperatures up to 260°C for 30 seconds and is fully compatible with standard Pb-free SAC305 profiles without delamination or parametric shift.

How does the +4.7 mV/°C temperature coefficient affect regulation accuracy?

This positive coefficient means voltage increases by 4.7 mV per °C rise above 25°C. Over a –40°C to +125°C range, total drift is approximately ±70 mV - well within the ±160 mV window defined by its ±2.0% tolerance, making it suitable for closed-loop systems where minor drift is compensated digitally or via feedback design.

Can BZT585B8V2TQ-7 be used in series or parallel configurations?

Series connection is not recommended due to mismatched temperature coefficients and Zener impedances causing uneven voltage division. Parallel use is acceptable only with matched units and external balancing resistors to prevent current hogging; however, single-device operation is preferred for precision applications per Diodes' application guidance in AN-102.