Diodes Incorporated BZT52C6V8-13

Overview

BZT52C6V8-13 from Diodes Incorporated is a surface-mount Zener diode with nominal 6.8 V breakdown voltage, ±5% tolerance (6.4–7.2 V), 5 mA test current, 15 Ω dynamic impedance at I_ZT, and 2.0 mA maximum knee current. It delivers stable voltage reference in low-power regulation and overvoltage protection circuits, such as USB port ESD clamp biasing and microcontroller reset circuitry.

For engineers reviewing the BZT52C6V8-13 datasheet, BZT52C6V8-13 pinout, BZT52C6V8-13 application, or BZT52C6V8-13 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (338 °C/W), SOD123 package compatibility, reverse leakage at 4.5 V (≤5 µA), and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This Zener diode operates in reverse-biased breakdown mode to maintain a stable reference voltage across its terminals under varying load and temperature conditions. Its planar die construction ensures consistent breakdown characteristics, while the 500 mW power dissipation rating (at T_L = +75 °C) supports moderate transient energy absorption.

The device exhibits a positive temperature coefficient of +1.2 mV/°C near 6.8 V, enabling predictable drift compensation in multi-diode reference strings. Its 80 Ω maximum Zener impedance at knee current (I_ZK = 2.0 mA) confirms low-noise performance suitable for precision analog sensing interfaces.

Key Specifications

Pinout & Package

Package: SOD123 - surface-mount plastic case with cathode band marking; dimensions: 2.65 mm × 1.55 mm × 1.05 mm (L × W × H); weight ≈ 0.010 g; UL 94V-0 rated molding compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMSZ4687-7-F and BZX84-C6V8, BZT52C6V8-13 offers superior thermal performance (338 °C/W vs. ≥375 °C/W), tighter production lot consistency due to planar die process, and full AEC-Q101 validation-making it optimal for space-constrained, thermally demanding automotive and industrial applications where long-term voltage stability is critical.

Availability

BZT52C6V8-13 is available at Aetrix Electronics and suitable for USB power protection, microcontroller reset generation, and automotive sensor biasing requiring stable component supply, traceable sourcing, and lifecycle continuity.

Supply support for BZT52C6V8-13 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 across Asia, Europe, and North America.

The BZT52 series belongs to Diodes' general-purpose Zener diode product line, engineered for medium-current voltage regulation and overvoltage protection in cost-sensitive, high-volume applications including automotive ECUs and consumer power supplies.

FAQ

What is the maximum reverse voltage before breakdown for BZT52C6V8-13?

The BZT52C6V8-13 begins controlled reverse conduction at a nominal 6.8 V, with guaranteed breakdown occurring between 6.4 V and 7.2 V when tested at 5 mA. Below 4.5 V, reverse leakage remains ≤5 µA - confirming stable non-conducting behavior in sub-threshold bias conditions used for reference networks.

Can BZT52C6V8-13 replace a 6.2 V Zener in an existing design?

No - BZT52C6V8-13 has a fixed 6.8 V nominal Zener voltage and cannot substitute for a 6.2 V part without circuit recalibration. Its 6.4–7.2 V tolerance range does not overlap the 5.8–6.6 V range of BZT52C6V2, and forward voltage (0.9 V @ 10 mA) is identical, so bias point shifts will occur in shunt regulator topologies.

Is the SOD123 package compatible with reflow soldering per J-STD-020?

Yes - the SOD123 package is rated for moisture sensitivity level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30 °C/85% RH without baking. It supports standard lead-free reflow profiles (peak 260 °C, 10–30 sec above 217 °C), with matte tin plating ensuring reliable solder wetting per MIL-STD-202, Method 208.

Does BZT52C6V8-13 support bidirectional ESD protection?

No - it is a unidirectional Zener diode with cathode-band polarity. It conducts only in reverse breakdown (cathode positive relative to anode) and forward-biases at ~0.9 V. For bidirectional TVS protection, a dedicated symmetric device like D3V3M1U2LP or SMAJ6.0A is required.