Diodes Incorporated BZT585B6V2TQ-13

Overview

BZT585B6V2TQ from Diodes Incorporated is a precision Zener diode with 6.2 V nominal breakdown voltage (±2.0% tolerance), 350 mW power dissipation, and SOD523 package. It operates from −65 °C to +150 °C, features 10 Ω dynamic impedance at 5 mA test current, and is AEC-Q101 qualified for automotive voltage regulation and reference applications.

For engineers reviewing the BZT585B6V2TQ datasheet, BZT585B6V2TQ pinout, BZT585B6V2TQ application, or BZT585B6V2TQ equivalent, this page delivers verified electrical parameters, thermal derating behavior, cathode-band polarity confirmation, and automotive-grade reliability context - critical for ECU power rail clamping, sensor biasing, and low-power analog reference design.

Technical Context

This Zener diode uses silicon planar construction with tight 6.08–6.32 V breakdown range at 5 mA, enabling stable voltage reference in space-constrained PCB layouts. Its ±2.0% tolerance and 2.2 mV/°C temperature coefficient support accurate DC biasing where drift must remain under 15 mV over −40 °C to +125 °C ambient.

The device exhibits 250 pF capacitance at 0 V reverse bias and 3 µA maximum reverse leakage at 4 V, making it suitable for low-frequency regulation rather than high-speed signal clamping. Thermal resistance of 357 °C/W (on FR-4) requires careful layout to sustain full 350 mW dissipation at elevated temperatures.

Key Specifications

Pinout & Package

Package: SOD523 - ultra-compact surface-mount plastic package (1.2 mm × 0.8 mm × 0.6 mm), flat lead design optimized for low profile and thermal performance on FR-4 PCBs. Cathode identified by band marking on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5234BS-7-F and BZX84-C6V2, BZT585B6V2TQ delivers tighter tolerance, lower impedance, higher power rating, and automotive qualification - making it the sole choice for AEC-compliant systems needing precision in minimal area.

Availability

BZT585B6V2TQ is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor modules, and low-power IoT nodes requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for BZT585B6V2TQ 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 ICs, specializing in high-reliability components for automotive, industrial, and computing markets.

This device belongs to the BZT585B series of AEC-Q101-qualified Zener diodes designed specifically for precision voltage reference and transient suppression in space-constrained automotive electronics.

FAQ

What is the maximum continuous reverse voltage that BZT585B6V2TQ can safely regulate?

The device is rated for continuous operation at its nominal Zener voltage of 6.2 V, with a maximum power dissipation of 350 mW. At 6.2 V, this corresponds to a maximum average Zener current of 56.5 mA. Exceeding this current - even briefly - risks thermal runaway unless board-level heatsinking is implemented per Diodes' recommended pad layout.

Does BZT585B6V2TQ support bidirectional ESD protection?

No - it is a unidirectional Zener diode optimized for reverse-bias regulation. While it conducts forward at ~0.9 V, its 1.1 V VF at 100 mA and lack of specified ESD ratings (e.g., IEC 61000-4-2) mean it is unsuitable as a dedicated ESD suppressor. Use dedicated TVS diodes like D3V3M1U2LP for bidirectional protection.

How does the +2.2 mV/°C temperature coefficient affect accuracy in a 0–70 °C operating range?

Over a 70 °C span, the coefficient contributes ±154 mV (2.2 × 70) drift from nominal 6.2 V - approximately ±2.5%. Combined with ±2.0% initial tolerance, total worst-case deviation is ±4.5%, which remains within specification for most non-precision analog references. For tighter stability, pair with temperature-compensated circuits or select higher-voltage Zeners with near-zero TC.

Is the SOD523 package compatible with standard reflow profiles for lead-free soldering?

Yes - the device is fully RoHS-compliant and rated for moisture sensitivity level 1 (MSL-1), meaning it may be stored indefinitely at ≤30 °C/60% RH without baking. It supports JEDEC J-STD-020D-compliant lead-free reflow profiles, with peak temperature up to 260 °C for ≤30 seconds, provided the recommended SOD523 pad layout (G = 0.80 mm, X = 0.60 mm) is followed to ensure reliable solder joint formation.