Nexperia BZX84-B12

Mfr. Part

BZX84-B12

Manufacturer

Nexperia. Y-IC is a quality authorized distributor for Nexperia. We deliver genuine parts, fast service, and reliable support to ensure you receive the best products and the best customer experience.

Detailed Description

Nexperia BZX84-B12 is a low-power, precision 12 V Zener diode in a compact SOT-23 package. It provides a stable voltage reference and clamp function for small, space-limited circuits. The “B” grade indicates a tight ±2% Zener voltage tolerance. “PHI” denotes the manufacturing location and does not affect electrical performance. Although sometimes listed under Specialized ICs, this is a discrete Zener diode designed for regulation, protection, and biasing in low-current applications.

Key Features

Nominal Zener voltage 12 V with ±2% tolerance (B-grade)

Small SOT-23 (TO-236AB) surface-mount package

Low power dissipation design for compact boards

Fast response to transients for effective clamping

Low leakage current and stable characteristics over temperature

Clearly marked polarity (cathode stripe) for easy assembly

Broad operating temperature range suitable for harsh environments

Key Advantages

Precise 12 V clamp helps protect sensitive IC inputs and supplies

Saves board space and reduces BOM cost compared to larger packages

Simple to design-in for voltage references, bias networks, and line protection

Stable performance supports consistent product behavior

Widely available and supported by Y-IC for dependable supply continuity

Packaging

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

Lead material and finish: tin-plated copper leads, RoHS compliant

Typical outline size: about 2.9 mm × 1.3 mm × 1.1 mm (compact footprint)

Pin configuration: 3 leads total; diode between Pin 1 (cathode) and Pin 2 (anode); Pin 3 is not connected (NC)

Polarity marking: cathode indicated by a stripe on the body

Tape and reel for automated assembly (commonly 3,000 units per reel); cut-tape options available

Thermal notes: small package requires proper derating at higher ambient temperatures; observe maximum junction temperature; use adequate copper area for heat spreading

Electrical properties (typical for this family): nominal Zener 12 V, test current around 5 mA, low dynamic resistance, low reverse leakage; total power dissipation in the few-hundred-milliwatt range—follow the datasheet limits for safe operation

Lifecycle

Status: Active and widely used. Not near discontinuation based on current market information.

Equivalent or alternative models:

- Nexperia BZX84-A12 (±1% tolerance) for tighter precision

- Nexperia BZX84-C12 (±5% tolerance) for cost-sensitive designs

- Nexperia BZT52-B12 (SOD123 package) for higher power in a different SMD form factor

- Nexperia BZV55-B12 (SOD80C/minimelf) for axial SMD applications

- Vishay, onsemi, Diodes Inc, ROHM offer similar 12 V SOT-23 Zeners (e.g., BZX84C12, MMSZ12 series) as cross alternatives

- Always confirm pin configuration, tolerance, power rating, and package dimensions when substituting

If you need help finding a drop-in replacement or a precise cross, contact our Y-IC sales team via our website for tailored recommendations and up-to-date availability.

Key Application Areas

Input and supply rail over-voltage protection and clamping

Precision biasing and voltage reference in analog front-ends

Level shifting and stabilization in low-power circuits

Protection of microcontroller, sensor, and communication lines

Portable, wearable, IoT, and battery-powered devices where space and efficiency matter

Automotive, industrial, and consumer electronics (consult us for automotive-grade options and qualification needs)

Datasheet

Our website hosts the most authoritative datasheet for the current BZX84-B12 model. We recommend downloading it right on this page to get exact electrical limits, temperature derating curves, pin orientation diagrams, and application notes for best design results.

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