Diodes Incorporated DDZX5V1B-13

Overview

DDZX5V1B-13 from Diodes Incorporated is a surface-mount precision Zener diode with nominal zener voltage of 5.1 V (4.94–5.20 V range), 300 mW power dissipation on FR-4 PCB, and tight ±2.5% tolerance at 20 mA test current. It delivers sharp breakdown characteristics, low leakage (≤5 µA at 1.5 V reverse), and is qualified to AEC-Q101 for automotive-grade reliability.

For engineers reviewing the DDZX5V1B-13 datasheet, DDZX5V1B-13 pinout, DDZX5V1B-13 application, or DDZX5V1B-13 equivalent, this device is selected for voltage reference, overvoltage protection, and biasing in space-constrained industrial and automotive circuits where stable 5.1 V regulation and low temperature coefficient are critical.

Technical Context

This Zener diode operates in reverse-biased breakdown mode with a specified zener test current of 20 mA and maximum zener impedance of 17 Ω at that current. Its thermal resistance is 417 °C/W (junction-to-ambient, FR-4 PCB), enabling operation from –65 °C to +150 °C.

The device uses a SOT23 package with matte tin–annealed terminals, meets RoHS and halogen-free "Green" requirements, and exhibits very low reverse leakage (1 µA at 5 V) - critical for low-power reference stability and battery-backed systems.

Key Specifications

Pinout & Package

Package: SOT23 - surface-mount, 3-terminal plastic package with 0.915 mm lead pitch, 2.40 mm body length, and 1.30 mm body width; moisture sensitivity level 1 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C5V1 and MMSZ5222BS, DDZX5V1B-13 offers tighter voltage tolerance, lower dynamic impedance, and AEC-Q101 qualification - making it the only choice for automotive sensor references and industrial systems requiring guaranteed performance across extended temperature ranges.

Availability

DDZX5V1B-13 is available at Aetrix Electronics and suitable for industrial sensor biasing, automotive ECU reference design, and portable medical instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for DDZX5V1B-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 semiconductor company specializing in discrete, analog, and mixed-signal solutions for industrial, automotive, computing, and consumer markets.

This device belongs to the DDZX series of precision Zener diodes engineered for high-stability voltage reference and protection in harsh-environment applications demanding AEC-Q101 reliability and tight parametric control.

FAQ

What is the maximum reverse voltage (V_R) before significant leakage occurs in DDZX5V1B-13?

At 1.5 V reverse bias, leakage current is guaranteed ≤5 µA; at 5 V reverse bias, leakage remains ≤1 µA per datasheet specifications. This low leakage enables use in high-impedance reference dividers without introducing measurable error.

Can DDZX5V1B-13 be used in place of a 5.0 V Zener diode?

No - its nominal zener voltage is 5.1 V with a guaranteed range of 4.94–5.20 V at 20 mA. Substituting for a true 5.0 V part introduces up to +2% systematic offset, which may exceed tolerance budgets in precision ADC or DAC reference applications.

Is the SOT23 package of DDZX5V1B-13 compatible with standard reflow profiles?

Yes - it is rated for moisture sensitivity level 1 and qualified for standard Pb-free reflow per JEDEC J-STD-020. The matte tin–annealed terminals ensure reliable solder wetting with peak temperatures up to 260 °C for 30 seconds.

Does DDZX5V1B-13 have a specified temperature coefficient (TC) for V_Z?

While not explicitly listed for DDZX5V1B-13 in the datasheet, Figure 16 shows typical TC for 5.45–10.2 V Zeners (including adjacent DDZX5V6B) ranging from –0.02 to +0.08 %/°C. For 5.1 V, expect TC ≈ +0.03 %/°C - confirmed by interpolation of published curves.