Diodes Incorporated SMAZ16-13

Overview

SMAZ16-13 from Diodes Incorporated is a 1.0W surface-mount Zener diode with a nominal zener voltage of 16.0V (±5% tolerance), 15mA maximum zener test current, and 150Ω maximum zener impedance at I_ZT. It features a cathode band polarity marking, SMA package, and is rated for operation from –65°C to +150°C. It is used for precision voltage regulation in power supply feedback loops and overvoltage protection circuits.

For engineers reviewing the SMAZ16-13 datasheet, SMAZ16-13 pinout, SMAZ16-13 application, or SMAZ16-13 equivalent, key selection criteria include zener voltage accuracy, thermal resistance (R_θJA = 100°C/W), power derating above +50°C, and reverse leakage at VR = 12.2V (≤0.5µA).

Technical Context

This Zener diode operates in reverse breakdown to maintain stable reference voltage under varying load and temperature conditions. Its 1.0W power rating at +25°C derates linearly at 10mW/°C above +50°C, and its junction-to-ambient thermal resistance is 100°C/W on standard FR-4 PCB layout.

The device exhibits low dynamic impedance (150Ω max at I_ZT = 15mA) and tight voltage tolerance (±5%), enabling reliable regulation in low-power analog and digital supply rails. Reverse leakage remains ≤0.5µA at 12.2V, supporting low-quiescent-current designs.

Key Specifications

Pinout & Package

Package: SMA (Surface Mount Axial), molded plastic case per JEDEC DO-214AC, UL 94V-0 rated, 0.064g weight. Cathode identified by band marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C16-7-F and 1N4744A, SMAZ16-13 uniquely balances 1.0W power handling, SMT manufacturability, and 100°C/W thermal performance-making it optimal for automated production of compact, thermally demanding power supplies.

Availability

SMAZ16-13 is available at Aetrix Electronics and suitable for switch-mode power supplies, automotive overvoltage protection, and industrial sensor signal conditioning requiring stable component supply across extended temperature ranges and high-volume production cycles.

Supply support for SMAZ16-13 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 and manufacturing operations across Asia and the Americas.

The SMAZ series belongs to Diodes' high-reliability Zener diode product line, engineered specifically for stable voltage reference and transient suppression in automotive, industrial, and computing power systems.

FAQ

What is the maximum reverse voltage (VR) at which leakage current is specified for SMAZ16-13?

The datasheet specifies maximum reverse leakage current (IR) ≤ 0.5 µA at VR = 12.2 V. This voltage corresponds to 76% of the nominal zener voltage (16.0 V), ensuring low standby current while maintaining margin below breakdown onset. The test condition is defined in the Electrical Characteristics table under "Maximum Reverse Current (Note 6)".

How does the 1.0W power rating change with ambient temperature?

Power dissipation is derated linearly above +50°C at 10 mW/°C, dropping to zero at +150°C. At +75°C, allowable power is 0.75 W; at +100°C, it is 0.5 W. This derating assumes mounting on an FR-4 PCB with Diodes Inc.'s recommended pad layout (1 inch × 0.85 inch, 0.062 inch thick).

Is SMAZ16-13 suitable for use in automotive under-hood applications?

Yes - its operating temperature range (–65°C to +150°C), AEC-Q200-compatible construction (lead-free, halogen-free, UL 94V-0 mold compound), and stable zener characteristics across temperature make it qualified for non-safety-critical under-hood functions such as sensor biasing and ECU power rail clamping.

What is the meaning of the "-13" suffix in SMAZ16-13?

The "-13" suffix denotes tape-and-reel packaging: 5,000 units per reel, compatible with standard SMT pick-and-place equipment. It is not a revision code or performance variant - all electrical and thermal specifications remain identical to the base SMAZ16 part number.