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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Diodes Incorporated BZT585B6V8TQ-13

Name: BZT585B6V8TQ-13
Brand: Diodes Incorporated
SKU: BZT585B6V8TQ-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BZT585B6V8TQ-13

Manufacturer:: Diodes Incorporated

Category:: Single Zener Diodes

Package:: SC-79, SOD-523

Datasheet:: BZT585B6V8TQ-13.pdf

Description:: DIODE ZENER 6.8V 350MW SOD523

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Product details

Overview

BZT585B6V8TQ from Diodes Incorporated is a precision Zener diode with 6.8 V nominal breakdown voltage (±2.0% tolerance), 350 mW power dissipation, and SOD523 package. It operates across –65 °C to +150 °C, features 15 Ω dynamic impedance at 5 mA test current, and delivers stable voltage reference in low-power analog circuits and automotive ECUs.

For engineers reviewing the BZT585B6V8TQ datasheet, BZT585B6V8TQ pinout, BZT585B6V8TQ application, or BZT585B6V8TQ equivalent, key selection criteria include Zener voltage accuracy, thermal stability (TC = +3.0 mV/°C), low capacitance (215 pF @ 1 MHz), AEC-Q101 qualification, and SOD523 footprint compatibility for space-constrained PCBs.

Technical Context

This Zener diode uses silicon planar construction with tight voltage regulation for precision biasing and voltage clamping. Its ±2.0% V_Z tolerance and +3.0 mV/°C temperature coefficient enable predictable performance across industrial and automotive temperature ranges.

Designed for surface-mount operation on FR-4 PCBs with minimum pad layout, it achieves 357 °C/W junction-to-ambient thermal resistance and supports continuous forward current up to 200 mA - enabling use in both reverse-biased regulation and forward-biased protection roles.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	6.8 V nominal, 6.66–6.94 V range at 5 mA - ensures tight reference accuracy for feedback loops and ADC references.
Zener Impedance (Z_ZT)	15 Ω at I_ZT = 5 mA - minimizes output voltage variation under load changes in regulation circuits.
Power Dissipation (P_D)	350 mW - supports stable operation without heatsinking in compact consumer and automotive modules.
Temperature Coefficient (TC)	+3.0 mV/°C - enables predictable drift compensation in temperature-sensitive analog signal chains.
Reverse Leakage (I_R)	2 µA max at V_R = 4 V - ensures low quiescent current in battery-powered voltage monitor circuits.
Capacitance (C_T)	215 pF at f = 1 MHz, V_R = 0 V - limits high-frequency noise coupling in RF-adjacent power rails.
Package	SOD523 - 1.2 mm × 0.8 mm footprint with 0.65 mm height, compatible with automated pick-and-place and reflow.

Pinout & Package

Package: SOD523 - ultra-compact, flat-lead surface-mount package with cathode band marking. Molded green compound (UL 94V-0), matte tin annealed terminals, moisture sensitivity level 1.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / Zener cathode reference ground	Connected to circuit ground or lower-potential node; defines reference point for regulated output voltage.
Cathode	Zener breakdown terminal / voltage regulation input	Connected to unregulated supply; reverse-biased to maintain stable 6.8 V drop across load or feedback network.

Key Features

Feature	Design Value
±2.0% Zener voltage tolerance	Enables direct replacement in precision feedback networks without recalibration of voltage setpoints.
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per IATF16949 processes.
SOD523 low-profile package	0.65 mm max height allows integration beneath connectors or in multi-layer stack-ups with strict Z-axis constraints.
Halogen- and antimony-free "Green" construction	Meets JESD204B compliance thresholds (<900 ppm Br/Cl, <1000 ppm Sb) for eco-conscious industrial and EV applications.

Applications

Automotive Body Control Module (BCM)

Industrial Sensor Signal Conditioning

Use Scenario: Regulating reference voltage for LIN bus transceiver biasing and microcontroller ADC inputs in door module ECUs.

IC Role / Device Role / Timing Role: Precision voltage reference and overvoltage clamp protecting 5 V rail from load-dump transients.

Use Value: Maintains ±2.0% V_Z stability across –40 °C to +125 °C ambient, reducing calibration drift in production test.

Use Scenario: Providing stable 6.8 V reference for bridge amplifier biasing and RTD front-end instrumentation amplifiers.

IC Role / Device Role / Timing Role: Low-drift Zener shunt regulator establishing common-mode voltage for differential signal paths.

Use Value: 15 Ω Z_ZT and +3.0 mV/°C TC minimize gain error in 24-bit sigma-delta ADC systems operating at 85 °C.

USB-C Power Delivery Monitor

Medical Wearable Battery Management

Use Scenario: Clamping VBUS sense line during hot-plug events and regulating auxiliary supply for PD controller logic.

IC Role / Device Role / Timing Role: Dual-role Zener: forward conduction for ESD protection, reverse breakdown for 6.8 V regulation.

Use Value: 200 mA I_F rating and 0.9 V V_F @ 10 mA support robust transient suppression without series resistor overhead.

Use Scenario: Setting threshold for low-battery warning comparator and stabilizing charge termination voltage reference.

IC Role / Device Role / Timing Role: Low-leakage (2 µA @ 4 V) shunt reference enabling multi-week standby operation on coin-cell power.

Use Value: 215 pF C_T avoids phase margin degradation in op-amp-based hysteresis comparators used in wearable health monitors.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMSZ5235B-7-F (Diodes Inc.)	Same 6.8 V nominal, but ±5% tolerance and SOD-123 package (2.7 × 1.6 mm); higher Z_ZT = 10 Ω @ 20 mA.	Larger footprint; suited for non-automotive, cost-sensitive consumer designs where board space is less constrained.	Select when AEC-Q101 qualification is not required and thermal derating margin exceeds 350 mW.
BZX84-C6V8 (Nexperia)	6.8 V ±5%, SOT-23 package; 100 mW P_D, Z_ZT = 40 Ω @ 5 mA; no AEC-Q101 certification.	Lower power handling and wider V_Z spread limit use to non-critical biasing in commercial-grade equipment.	Choose only for prototyping or legacy designs where SOT-23 placement infrastructure already exists.

Compared with MMSZ5235B-7-F and BZX84-C6V8, BZT585B6V8TQ offers tighter tolerance, higher power rating, smaller footprint, and automotive qualification - making it optimal for safety-relevant, space-limited, and thermally demanding applications.

Availability

BZT585B6V8TQ is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, USB-C power delivery monitors, and medical wearable battery management requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BZT585B6V8TQ 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 spanning Asia, Europe, and North America.

The BZT585B series belongs to Diodes' precision Zener diode product line, engineered specifically for automotive and industrial applications demanding AEC-Q101 reliability, tight voltage tolerance, and low-profile packaging.

FAQ

What is the maximum reverse voltage this Zener can sustain before breakdown?

The BZT585B6V8TQ has a nominal Zener voltage of 6.8 V with a guaranteed range of 6.66 V to 6.94 V at 5 mA test current. Breakdown occurs within this range under reverse bias; operation above 6.94 V risks exceeding specified Zener impedance and thermal limits. Absolute maximum reverse voltage is not defined beyond the rated V_Z range - sustained operation outside 6.66–6.94 V requires current limiting to stay within 350 mW power dissipation.

Is this device suitable for use in a 12 V automotive system with load dump transients?

Yes - the BZT585B6V8TQ is AEC-Q101 qualified and rated for operation from –65 °C to +150 °C. While its 6.8 V Zener voltage is below typical 12 V rail levels, it is commonly used in conjunction with series resistors or as part of a clamping network to protect downstream 5 V or 3.3 V regulators from transients. Its 200 mA forward current rating also supports robust ESD and surge handling in combination with TVS devices.

How does the +3.0 mV/°C temperature coefficient affect circuit accuracy over temperature?

At +3.0 mV/°C, the Zener voltage increases by approximately 0.45 V over a 150 °C span (–65 °C to +85 °C). For a 6.8 V nominal device, this represents ~6.6% full-scale drift. In precision applications, this is mitigated by using the diode in constant-current mode with temperature-compensated bias or pairing it with complementary TC components. The datasheet specifies TC at I_ZT = 5 mA and T_J = 25 °C.

Can this Zener be used in forward conduction mode like a standard diode?

Yes - the BZT585B6V8TQ exhibits typical silicon diode forward characteristics: 0.9 V @ 10 mA and 1.1 V @ 100 mA. Its 200 mA continuous forward current rating and low forward voltage make it suitable for ESD protection, polarity protection, or low-voltage rectification in low-power circuits, provided power dissipation remains within 350 mW limits under combined forward and reverse stress conditions.

BZT585B6V8TQ-13 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SC-79, SOD-523

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 6.8 V

Tolerance:: ±2%

Power - Max:: 350 mW

Impedance (Max) (Zzt):: 15 Ohms

Current - Reverse Leakage @ Vr:: 2 µA @ 4 V

Voltage - Forward (Vf) (Max) @ If:: 1.1 V @ 100 mA

Operating Temperature:: -65°C ~ 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-523

BZT585B6V8TQ-13 FAQ

1.How can I place an order for BZT585B6V8TQ-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for BZT585B6V8TQ-13 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for BZT585B6V8TQ-13 reliable?

The price and inventory of BZT585B6V8TQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZT585B6V8TQ-13 is usually 5 days.

3.What payment methods are accepted for BZT585B6V8TQ-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZT585B6V8TQ-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BZT585B6V8TQ-13?

BZT585B6V8TQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BZT585B6V8TQ-13 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for BZT585B6V8TQ-13?

For technical support, including BZT585B6V8TQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZT585B6V8TQ-13 requirements.

6.How does Aetrix verify that BZT585B6V8TQ-13 is sourced from the original manufacturer or authorized distributors?

All BZT585B6V8TQ-13 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BZT585B6V8TQ-13 meets industry standards.

7.What is the process for return or replacement of BZT585B6V8TQ-13?

All BZT585B6V8TQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with BZT585B6V8TQ-13, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The BZT585B6V8TQ-13 part is unused and in its original packaging.

Return procedure for BZT585B6V8TQ-13:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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