Diodes Incorporated UDZ5V6B-7

Overview

UDZ5V6B-7 from Diodes Incorporated is a surface-mount precision Zener diode with nominal zener voltage 5.49–5.73 V, 200 mW power dissipation, 60 Ω zener impedance at 5 mA, 1 µA maximum reverse leakage at 2.5 V, and SOD323 package. It provides stable voltage reference in low-power analog circuits, power supply feedback loops, and overvoltage protection for microcontroller I/O pins.

For engineers reviewing the UDZ5V6B-7 datasheet, UDZ5V6B-7 pinout, UDZ5V6B-7 application, or UDZ5V6B-7 equivalent, key selection criteria include zener voltage tolerance (±2.1% at 5 mA), thermal resistance (625 °C/W), cathode-band polarity marking, tight regulation under low-current conditions, and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain precise DC voltage regulation across varying load and temperature conditions. Its sharp knee characteristic and low dynamic impedance (60 Ω at I_ZT = 5 mA) ensure minimal output deviation under transient current changes.

Designed for surface-mount assembly on FR-4 PCBs using standard reflow profiles, it features matte tin–annealed terminals compatible with MIL-STD-202 soldering and meets J-STD-020D Level 1 moisture sensitivity requirements. The device exhibits a temperature coefficient of approximately +0.04 %/°C near 5.6 V, enabling predictable drift compensation in reference designs.

Key Specifications

Pinout & Package

Package: SOD323 - ultra-compact 2-pin surface-mount case (1.30 × 1.70 × 0.95 mm), UL 94V-0 rated, cathode identified by band marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX584C5V6 and MMSZ5232BS, UDZ5V6B-7 offers tighter voltage tolerance (±2.1% vs. ±5%), lower thermal resistance per unit area due to optimized SOD323 pad layout, and AEC-Q101 qualification - making it preferred for precision automotive and industrial feedback applications where regulation accuracy and reliability are critical.

Availability

UDZ5V6B-7 is available at Aetrix Electronics and suitable for power supply feedback, microcontroller I/O protection, temperature-stable reference, and automotive sensor biasing requiring stable component supply across production lifecycles.

Supply support for UDZ5V6B-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, serving industrial, computing, consumer, and automotive markets with high-reliability components.

The UDZ series belongs to Diodes' precision Zener diode product line, engineered specifically for high-accuracy voltage reference and clamping in space-constrained, thermally demanding applications such as automotive ECUs and portable instrumentation.

FAQ

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

The UDZ5V6B-7 has a specified zener voltage range of 5.49–5.73 V at 5 mA test current. Its reverse breakdown is guaranteed to occur within this window. Applying less than 2.5 V reverse bias yields ≤1 µA leakage; beyond that, current rises sharply near the knee voltage (~5.2 V). Do not exceed 200 mW total dissipation regardless of voltage.

Is the SOD323 package compatible with standard reflow soldering processes?

Yes - the UDZ5V6B-7 is rated J-STD-020D Level 1 for moisture sensitivity and features matte tin–annealed terminals qualified per MIL-STD-202, Method 208. It supports lead-free reflow profiles up to 260°C peak with standard preheat and soak times on FR-4 boards using Diodes' recommended pad layout.

How does temperature affect its zener voltage stability?

At 5.6 V nominal, UDZ5V6B-7 exhibits a positive temperature coefficient of approximately +0.04 %/°C, meaning voltage increases ~2.24 mV/°C. This behavior is stable and repeatable, allowing predictable compensation in reference designs operating from −65°C to +150°C.

Can this device replace a 5.6 V Zener in an existing design using through-hole components?

Yes, functionally - but mechanical replacement requires adapting the footprint from DO-35 or similar to SOD323. Electrical behavior matches typical 5.6 V Zeners, though UDZ5V6B-7 offers tighter tolerance (±2.1% vs. common ±5%) and lower dynamic impedance (60 Ω vs. 100+ Ω), improving regulation accuracy and transient response.