NXP BZX84-B11

Mfr. Part

BZX84-B11

Manufacturer

Freescale / NXP Semiconductors

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Detailed Description

Single Zener diode, nominal 11 V, tight tolerance B-grade series (±2%), SOT-23 (TO-236AB) small-signal package. Designed for voltage regulation, reference, and clamping in low-power circuits. Note: While sometimes grouped under “Specialized ICs,” this device is a discrete Zener diode (not a logic or analog IC).

Key Features

Nominal Zener voltage 11 V at test current (typ 5 mA)

Tight tolerance B series ±2% for stable regulation

SOT-23 compact package for high-density layouts

Low dynamic impedance for better line/load regulation

Low leakage current in reverse at rated conditions

RoHS compliant, halogen-free, lead-free matte Sn finish

Moisture Sensitivity Level MSL 1 (unlimited floor life)

Reflow-solder compatible up to 260°C peak

Key Advantages

Accurate 11 V clamp/reference with ±2% tolerance reduces calibration effort

Small SOT-23 footprint saves board space vs. axial diodes

Low power dissipation device suitable for battery-powered designs

Broad second-sourcing across multiple manufacturers lowers supply risk

Proven, mature family with wide application support and design notes

Packaging

Package type: SOT-23 (JEDEC TO-236AB), plastic molded epoxy body

Materials: Epoxy encapsulation (UL 94V-0), Cu alloy leadframe, matte Sn plating, Pb-free, halogen-free

Typical size: approx. 2.9 mm L × 1.3 mm W × 1.1 mm H

Pin configuration: 3 leads total; two active terminals (anode and cathode), one no-connect. Refer to datasheet for exact pin mapping for this variant.

Tape-and-reel: 8 mm embossed tape; typically 3,000 pcs per 7-inch reel (other packing options on request)

Thermal characteristics (typical): Ptot ≈ 250 mW at TA = 25°C; derating ≈ 2 mW/°C; RθJA ≈ 500–625 K/W depending on PCB; Tj max 150°C; Tstg −65°C to +150°C

Electrical properties (nominal for BZX84-B11 family): VZ ≈ 11 V at IZT ≈ 5 mA; tolerance ±2%; dynamic impedance a few to tens of ohms depending on current; reverse leakage in the µA range at specified VR; small positive temperature coefficient near 11 V. Always confirm exact limits in the datasheet.

Lifecycle

Status: Active, widely used industry standard Zener series

Not near end-of-life based on current market status

Equivalent or alternative models (check datasheets for pinout and specs before substituting):

- Nexperia BZX84-B11

- ON Semiconductor / onsemi BZX84B11LT1G

- Vishay BZX84-B11

- Diodes Incorporated BZX84B11-7

- Micro Commercial Components (MCC) BZX84B11

- Taiwan Semiconductor (TSC) BZX84B11

If you need drop-in confirmation or more cross options, contact our sales team via the Y-IC website for support.

Key Application Areas

Voltage reference and regulation for low-power rails

Clamp and over-voltage protection for GPIO, ADC inputs, and small-signal lines

Level shifting and bias stabilization in analog/RF front-ends

Snubber/clamp networks in DC/DC converters and LED drivers

General-purpose protection in portable and IoT devices

Datasheet

Y-IC hosts the most authoritative datasheet for this exact model on our product page. We recommend downloading it here to verify pin mapping, electrical limits, and thermal data for your design.

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