Nexperia USA Inc. BZA456A,125

Overview

BZA456A from Nexperia is a quadruple ESD transient voltage suppressor diode in SOT457 (SC-74) package, configured as four cathodes sharing a common anode. It provides 5.6 V working voltage, >8 kV IEC 61000-4-2 ESD protection, and clamps to ≤8 V at 3 A peak pulse current. It is used for bidirectional ESD suppression on data lines in USB, keyboard, and parallel interfaces.

For engineers reviewing the BZA456A datasheet, BZA456A pinout, BZA456A application, or BZA456A equivalent, key selection criteria include common-anode quad-diode topology, 24 W peak pulse power rating, 140 pF capacitance at 3 V reverse bias, and SOT457 footprint compatibility with high-density PCB layouts.

Technical Context

The BZA456A integrates four monolithic Zener-based TVS diodes in a single common-anode configuration, enabling simultaneous protection of four independent signal lines against electrostatic discharge transients. Each diode exhibits a nominal working voltage of 5.6 V with ±5% tolerance and differential resistance ≤400 Ω at 1 mA.

It operates within −65 °C to +150 °C junction temperature range and delivers 24 W non-repetitive peak reverse power dissipation at 1 ms pulse width. Its low 140 pF capacitance at VR = 3 V ensures minimal signal distortion on high-speed digital lines up to ~100 MHz.

Key Specifications

Pinout & Package

SOT457 (SC-74) is a plastic surface-mounted package with six leads, 0.95 mm pin pitch, and 3.1 mm × 2.7 mm body dimensions. Thermal resistance from junction to soldering point is 125 K/W per diode when loaded.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad-channel ESD suppression applications.

Compared with ESDA6V1SC6 and TPD4E05U06DQAR, the BZA456A offers balanced performance for 5 V systems: moderate capacitance (140 pF), proven 24 W pulse handling, and direct SOT457 compatibility with legacy industrial and computing layouts-making it optimal for cost-sensitive, high-reliability USB/parallel interface protection.

Availability

BZA456A is available at Aetrix Electronics and suitable for USB interface protection, parallel port hardening, PS/2 peripheral shielding, and industrial I/O terminal safeguarding requiring stable component supply across long-lifecycle embedded programs.

Supply support for BZA456A 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

Nexperia is a global leader in high-volume production of discrete semiconductors, specializing in automotive-grade, industrial, and consumer power and signal protection devices.

The BZA456A belongs to Nexperia's ESD protection portfolio designed specifically for board-level I/O hardening in computing peripherals, audio/video interfaces, and industrial control terminals-emphasizing reliability under repetitive ESD stress and compatibility with standard SMT assembly processes.

FAQ

What is the maximum operating temperature for the BZA456A?

The BZA456A has a junction temperature range of −65 °C to +150 °C and a storage temperature range of −65 °C to +150 °C. Its total power dissipation derates linearly above 60 °C soldering-point temperature, reaching zero at 150 °C, per the published derating curve in Figure 3 of the datasheet.

Can the BZA456A be used for 3.3 V logic protection?

Yes, but with reduced margin: its 5.6 V nominal working voltage provides ~2.3 V headroom above 3.3 V rails, which may be insufficient for systems with wide V_CC tolerance or noise margins. For dedicated 3.3 V protection, Nexperia's ESDA6V1SC6 (6.1 V) or PESD5V0S1BA (5.0 V) offer tighter voltage alignment and lower clamping.

How does the dual common-anode pin (Pins 2 and 5) improve performance?

Pins 2 and 5 are internally bonded to the same common anode structure and provide redundant low-inductance paths to ground. Using both pins reduces effective series inductance by ~30%, lowering the di/dt-induced voltage overshoot during fast ESD transients and improving clamping consistency across all four channels.

Is the BZA456A RoHS compliant and halogen-free?

Yes-the BZA456A is manufactured in compliance with RoHS Directive 2011/65/EU and is halogen-free per Nexperia's standard product specifications. The SOT457 package uses lead-free matte tin plating and green molding compound, with full material declarations available in Nexperia's Product Change Notification (PCN) documentation.