Diodes Incorporated BZT585B8V2T-7

Overview

BZT585B8V2T-7 from Diodes Incorporated is a precision surface-mount Zener diode with nominal 8.2 V breakdown voltage, ±2.0% tolerance, 10 Ω dynamic impedance at 5 mA test current, and 350 mW power dissipation in SOD523 package. It provides stable voltage reference and overvoltage protection in low-power analog circuits, power supply feedback loops, and sensor biasing networks.

For engineers reviewing the BZT585B8V2T-7 datasheet, BZT585B8V2T-7 pinout, BZT585B8V2T-7 application, or BZT585B8V2T-7 equivalent, key selection criteria include Zener voltage accuracy, low temperature coefficient (+4.7 mV/°C), low reverse leakage (0.7 µA @ 5 V), and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown with tightly controlled V_Z = 8.2 V (min 8.04 V, max 8.36 V) at I_ZT = 5 mA. Its low 10 Ω Zener impedance ensures minimal output voltage variation under load changes.

The +4.7 mV/°C temperature coefficient indicates positive drift with rising junction temperature, requiring thermal compensation in high-precision references. Reverse capacitance is 150 pF at 0 V, limiting use in high-frequency clamping above ~1 MHz.

Key Specifications

Pinout & Package

Package: SOD523 - ultra-compact surface-mount plastic case with cathode band marking; dimensions: 1.6 mm × 0.8 mm × 0.35 mm (L × W × H); weight ≈ 0.001 g; RoHS-compliant matte tin finish on Alloy 42 leadframe.

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, BZT585B8V2T-7 delivers tighter voltage tolerance, lower dynamic impedance, and smaller footprint-making it optimal for space-constrained automotive and industrial analog designs where precision and reliability are non-negotiable.

Availability

BZT585B8V2T-7 is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial analog front-end protection, portable medical device reference, and smart meter power supply feedback requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BZT585B8V2T-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, headquartered in Plano, Texas, with design centers across Asia and manufacturing facilities in China, Taiwan, and the U.S.

The BZT585 series belongs to Diodes' precision Zener diode product line, engineered specifically for high-reliability voltage reference and transient suppression in automotive, industrial, and medical applications demanding tight tolerances and AEC-Q101 validation.

FAQ

What is the maximum continuous Zener current for BZT585B8V2T-7 at 25°C ambient?

The device supports up to 42.7 mA continuous Zener current at 25°C, calculated from P_D = 350 mW and V_Z = 8.2 V. Derating begins at 2.8 mW/°C above 25°C per the R_θJA = 357 °C/W specification, reducing usable current linearly with rising ambient temperature.

Does BZT585B8V2T-7 have a specified forward voltage?

Yes - forward voltage is 0.9 V at 10 mA and 1.1 V at 100 mA, per the datasheet's electrical characteristics table. This value is relevant for polarity verification during automated optical inspection and for ensuring correct orientation during reflow soldering.

Can BZT585B8V2T-7 be used in place of a 5.1 V Zener diode?

No - its nominal Zener voltage is fixed at 8.2 V and cannot substitute for 5.1 V references without circuit redesign. Using it in a 5.1 V feedback loop would cause overregulation and potential system instability due to excessive output voltage.

Is the SOD523 package compatible with standard reflow profiles?

Yes - the SOD523 package is qualified for JEDEC J-STD-020 moisture sensitivity level 1 and supports standard lead-free reflow profiles (peak 260°C, 10–30 sec). Its low mass and matte tin finish ensure reliable wetting and void-free solder joints on fine-pitch PCBs.