Diodes Incorporated BZX84C9V1T-7-F

Overview

BZX84C9V1T-7-F from Diodes Incorporated is a 9.1 V, 150 mW surface-mount Zener diode in SOT-523 package, rated for 5 mA test current with 15 Ω maximum Zener impedance at 5 mA and ±0.5 µA maximum reverse leakage at 6.0 V, used for precision voltage regulation and reference in low-power analog circuits.

For engineers reviewing the BZX84C9V1T-7-F datasheet, BZX84C9V1T-7-F pinout, BZX84C9V1T-7-F application, or BZX84C9V1T-7-F equivalent, key selection criteria include nominal Zener voltage tolerance (±6.6%), thermal resistance (833 °C/W), junction temperature range (–65 to +150 °C), and RoHS-compliant matte tin plating on Alloy 42 leadframe.

Technical Context

This Zener diode operates in reverse breakdown mode with a specified nominal Zener voltage of 9.1 V at 5 mA test current, exhibiting a temperature coefficient of +3.8 to +7.0 mV/°C. Its planar die construction ensures stable voltage regulation under low-current conditions.

The device is characterized by low dynamic impedance (15 Ω max at I_ZT = 5 mA) and tight reverse leakage (≤0.5 µA at V_R = 6.0 V), enabling reliable voltage clamping and reference stability in space-constrained PCB layouts.

Key Specifications

Pinout & Package

Package: SOT-523 - ultra-small plastic surface-mount case (1.60 mm × 0.80 mm × 0.50 mm), UL 94V-0 rated, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5240BS-7-F and BZX84-C9V1,115, the BZX84C9V1T-7-F offers optimal trade-off between ultra-compact size, low leakage, and thermal performance in cost-sensitive, space-constrained designs.

Availability

BZX84C9V1T-7-F is available at Aetrix Electronics and suitable for portable power management, industrial sensor signal conditioning, and automotive body control modules requiring stable component supply and full RoHS compliance.

Supply support for BZX84C9V1T-7-F 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 BZX84 series belongs to Diodes' precision Zener diode product line, engineered specifically for low-power voltage reference and overvoltage protection in compact, high-reliability consumer and industrial applications.

FAQ

What is the maximum reverse voltage this Zener diode can withstand before breakdown?

The BZX84C9V1T-7-F has a nominal Zener voltage of 9.1 V at 5 mA test current, with guaranteed breakdown occurring between 8.5 V and 9.6 V. It is not rated for sustained reverse operation below this range; applying <8.5 V in reverse yields negligible current (<0.5 µA at 6.0 V), while exceeding 9.6 V initiates controlled regulation.

Can this device be used in a forward-biased configuration like a standard diode?

Yes - the BZX84C9V1T-7-F exhibits a typical forward voltage of 0.9 V at 10 mA, matching standard silicon diode behavior. However, its primary design intent and characterization are for reverse-bias Zener operation; forward conduction is incidental and not optimized for switching or rectification applications.

How does the SOT-523 package affect thermal performance compared to SOT-23?

The SOT-523 package has higher thermal resistance (833 °C/W vs. ~300–400 °C/W for SOT-23), limiting power dissipation to 150 mW under standard FR-4 conditions. This necessitates stricter derating above 25°C ambient and makes it unsuitable for applications requiring >100 mW continuous dissipation without enhanced copper pour or airflow.

Is this part suitable for use in medical-grade equipment?

Yes - the BZX84C9V1T-7-F meets RoHS and "Green" material requirements, has no known restrictions for medical applications, and operates reliably across –65°C to +150°C. However, final qualification depends on system-level safety certification (e.g., IEC 60601-1), and users must validate performance under actual end-equipment stress conditions.