Diodes Incorporated UDZ6V2B-7

Overview

UDZ6V2B-7 from Diodes Incorporated is a surface-mount precision Zener diode with nominal Zener voltage 6.2 V, ±3.5% tolerance (6.06–6.33 V), 200 mW power rating, 60 Ω dynamic impedance at 5 mA, and 1 µA maximum reverse leakage at 3.0 V. It serves as a stable voltage reference or overvoltage clamp in low-power analog signal conditioning and power supply feedback paths.

For engineers reviewing the UDZ6V2B-7 datasheet, UDZ6V2B-7 pinout, UDZ6V2B-7 application, or UDZ6V2B-7 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (625 °C/W), SOD323 package compatibility with high-density PCB layouts, and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This device operates in reverse breakdown mode with sharp knee characteristics and tightly controlled voltage regulation across 1 µA to 20 mA Zener current range. Its low 60 Ω Zener impedance at 5 mA ensures minimal output voltage variation under load transients.

The SOD323 package enables automated placement and reflow soldering, while its 625 °C/W junction-to-ambient thermal resistance requires careful PCB copper area design to maintain safe operation within -65°C to +150°C ambient temperature range.

Key Specifications

Pinout & Package

Package: SOD323 - ultra-compact 2-pin surface-mount case (1.30 mm × 1.70 mm × 0.95 mm), cathode identified by band marking, matte tin-plated alloy 42 leadframe, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C6V2 and MMSZ4685, UDZ6V2B-7 offers superior voltage tolerance (±3.5% vs. ±5%), AEC-Q101 qualification for automotive use, and SOD323 size advantage-making it optimal for space-constrained, high-reliability designs where precision and qualification outweigh raw power headroom.

Availability

UDZ6V2B-7 is available at Aetrix Electronics and suitable for automotive ECU reference circuits, industrial sensor signal chains, and compact DC-DC converter feedback networks requiring stable component supply and long-term lifecycle support.

Supply support for UDZ6V2B-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, manufacturing, and sales operations across Asia, Europe, and North America.

The UDZ series belongs to Diodes' precision Zener diode product line, engineered specifically for high-accuracy voltage referencing in automotive, industrial, and communications systems where tight tolerance and qualification are mandatory.

FAQ

What is the maximum reverse voltage that can be safely applied before breakdown?

The UDZ6V2B-7 exhibits sharp Zener breakdown starting at 6.06 V and fully regulating up to 6.33 V at 5 mA. Applying reverse voltage below 3.0 V results in ≤1 µA leakage; operation above 6.33 V is permissible only with current limiting to stay within 200 mW dissipation limit and avoid thermal runaway.

Does this Zener diode require a series resistor in all applications?

Yes - a current-limiting resistor is mandatory to set the operating Zener current between 1 µA (minimum for regulation onset) and 20 mA (maximum before exceeding 200 mW). Typical values range from 1 kΩ to 10 kΩ depending on supply voltage and load current demands in feedback or clamp configurations.

How does the SOD323 package affect thermal performance compared to larger packages?

The SOD323's 625 °C/W R_θJA reflects its small thermal mass and limited copper pad coupling. To achieve comparable junction temperatures as SOT-23 devices, PCB layout must include ≥25 mm² of 1-oz copper connected directly to both terminals, per Diodes' recommended pad layout (Document DS30290, page 5).

Is the UDZ6V2B-7 suitable for use in medical equipment?

No - while AEC-Q101 qualified for automotive use, UDZ6V2B-7 is not certified to ISO 13485 or tested for life-support applications. Diodes Incorporated explicitly prohibits use in life-support devices without written CEO approval, and this part lacks the traceability, burn-in, and failure-rate data required for Class III medical systems.