Diodes Incorporated SMAZ10-13

Overview

SMAZ10-13 from Diodes Incorporated is a 1.0W surface-mount Zener diode with nominal zener voltage of 10.0V (±5%), 100Ω maximum zener impedance at 4mA test current, and 1.0µA maximum reverse leakage at 7.6V. It features SMA package, RoHS-compliant matte tin plating, and is rated for -65°C to +150°C operation. Used for voltage regulation and overvoltage protection in DC power rails and analog reference circuits.

For engineers reviewing the SMAZ10-13 datasheet, SMAZ10-13 pinout, SMAZ10-13 application, or SMAZ10-13 equivalent, key selection criteria include zener voltage tolerance, power derating above +50°C, thermal resistance (RθJA = 100°C/W), reverse leakage at VR, and compatibility with automated SMT assembly on FR-4 PCBs.

Technical Context

This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown when reverse-biased above its specified VZ. Its regulation performance is defined at IZT = 4mA, with ZZT ≤ 100Ω and ZZK ≤ 200Ω at IZK = 1mA, ensuring stable clamping under transient and steady-state conditions.

Thermal design relies on its RθJT = 30°C/W and RθJA = 100°C/W ratings, requiring appropriate copper pad area per Diodes' recommended SMA layout. Power dissipation derates linearly at 10mW/°C above +50°C ambient, limiting usable power to 0.5W at +100°C.

Key Specifications

Pinout & Package

Two-terminal device in SMA (DO-214AC) molded plastic package. Cathode identified by band or notch; anode is unmarked end. Dimensions: 4.60 × 2.92 × 1.63 mm (L × W × H). Weight: 0.064 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C10LT1G and 1N4740A, SMAZ10-13 uniquely balances high-power SMT capability, industry-standard SMA footprint, and low-leakage performance-making it optimal for modern automated production of industrial power interfaces.

Availability

SMAZ10-13 is available at Aetrix Electronics and suitable for industrial power supply protection, automotive ECU reference clamping, and consumer DC adapter regulation requiring stable component supply and full RoHS compliance.

Supply support for SMAZ10-13 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, serving industrial, computing, communications, and consumer markets since 1959.

The SMAZ series belongs to Diodes' high-reliability Zener diode product line, engineered specifically for precision voltage regulation and transient suppression in automated SMT production environments.

FAQ

What is the maximum continuous reverse voltage (VR) that SMAZ10-13 can withstand without breakdown?

SMAZ10-13 has a specified maximum reverse current (IR) of 1.0µA at VR = 7.6V. This means it remains in high-impedance blocking mode up to 7.6V; breakdown begins near its nominal VZ of 10.0V. Operation below 7.6V ensures negligible leakage and no regulation action.

Can SMAZ10-13 be used in parallel for higher power dissipation?

No-Zener diodes exhibit negative temperature coefficient and mismatched VZ tolerances, causing current hogging when paralleled. For >1.0W needs, use a single higher-rated device (e.g., 1.5W SMAZ10-13 variant if available) or implement active regulation with a transistor-based shunt.

Is the SMAZ10-13 cathode marked with a band or notch?

Yes-per Diodes' marking specification, the cathode is identified by either a molded band or a physical notch on the SMA package body. The anode is the unmarked end. Polarity must be verified visually before placement, as incorrect orientation prevents regulation.

Does SMAZ10-13 meet AEC-Q200 stress testing requirements for automotive use?

No-SMAZ10-13 is not AEC-Q200 qualified. While its operating temperature range (-65°C to +150°C) overlaps with automotive Grade 2, it lacks qualification testing for vibration, temperature cycling, and humidity bias per AEC-Q200. For automotive applications, specify AEC-Q200-qualified equivalents such as BZT52-B10S.