Diodes Incorporated BZT585B6V8T-7

Overview

BZT585B6V8T-7 from Diodes Incorporated is a precision surface-mount Zener diode with nominal 6.8 V breakdown voltage, ±2.0% tolerance, 15 Ω dynamic impedance at 5 mA, 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 BZT585B6V8T-7 datasheet, BZT585B6V8T-7 pinout, BZT585B6V8T-7 application, or BZT585B6V8T-7 equivalent, key selection criteria include Zener voltage accuracy, low dynamic impedance at rated test current, thermal resistance (357 °C/W), reverse leakage (<2 µA at 4 V), and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This device operates as a two-terminal voltage reference, regulating voltage by maintaining a stable reverse-biased breakdown across its junction. Its 6.8 V nominal Zener voltage exhibits +3.0 mV/°C temperature coefficient and 215 pF capacitance at 0 V, enabling predictable behavior in temperature-varying environments and high-frequency bypass applications.

The SOD523 package supports high power density with 350 mW rating on FR-4 PCB using Diodes Inc.'s recommended pad layout. Cathode band marking and matte tin-plated Alloy 42 leads ensure reliable solderability per MIL-STD-202, Method 208, while meeting AEC-Q101 stress testing requirements for automotive electronics.

Key Specifications

Pinout & Package

Package: SOD523 - ultra-compact, flat-lead surface-mount case measuring 1.50–1.70 mm length × 0.70–0.90 mm width × 0.25–0.35 mm height, optimized for low profile and high power density.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMSZ5235B-7-F and BZX84-C6V8, BZT585B6V8T-7 delivers tighter voltage tolerance, lower dynamic impedance, superior thermal performance in minimal area, and automotive-grade qualification-making it optimal for space-constrained, high-reliability analog regulation where precision and consistency are critical.

Availability

BZT585B6V8T-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, and USB-C power delivery monitor circuits requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for BZT585B6V8T-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 and manufacturing operations across Asia and the Americas.

The BZT585 series belongs to Diodes' precision Zener diode product line, engineered specifically for high-accuracy voltage reference and overvoltage protection in automotive, industrial, and portable electronics where tight tolerance, low impedance, and AEC-Q101 compliance are essential.

FAQ

What is the maximum reverse current specification for BZT585B6V8T-7 at 4 V?

The maximum reverse current (I_R) is 2 µA at V_R = 4 V and T_A = +25°C, as specified in the Electrical Characteristics table. This low leakage supports energy-efficient operation in always-on sensor nodes and battery-backed systems where standby current must remain below 5 µA.

Does BZT585B6V8T-7 require derating above +25°C ambient?

Yes - the device follows a linear power derating curve starting at +25°C, reducing maximum power dissipation by approximately 1.12 mW/°C above that point, based on its 357 °C/W thermal resistance. At +85°C ambient, maximum allowable power drops to ~280 mW on standard FR-4 PCB with recommended pad layout.

Is the SOD523 package compatible with standard reflow profiles?

Yes - the SOD523 package is qualified for lead-free reflow per J-STD-020, with moisture sensitivity level 1 (unlimited floor life). Its matte tin finish over Alloy 42 leadframe meets MIL-STD-202, Method 208 solderability requirements and withstands peak reflow temperatures up to 260°C.

How does the +3.0 mV/°C temperature coefficient affect voltage reference stability?

The +3.0 mV/°C coefficient means the Zener voltage increases by 3.0 mV per degree Celsius rise in junction temperature. Over a -40°C to +125°C range, this results in a total drift of ±495 mV - requiring system-level compensation or use within narrower ambient bands where drift remains within ±1% of 6.8 V.