Nexperia USA Inc. BZA462A,125

Overview

BZA462A 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 6.2 V working voltage, 24 W peak pulse power dissipation at 1 ms, and clamps to ≤9 V at 2.66 A peak current. It is used for I/O line protection in computer interfaces and microprocessor data buses.

For engineers reviewing the BZA462A datasheet, BZA462A pinout, BZA462A application, or BZA462A equivalent, key selection criteria include common-anode quad-channel ESD rating (>15 kV IEC 1000-4-2), low clamping voltage under fast transients, diode capacitance (110 pF at 4 V), and thermal resistance (125 K/W junction-to-solder point).

Technical Context

The BZA462A integrates four monolithic silicon avalanche diodes in a single SOT457 package with shared anode connection, enabling compact 4-line ESD protection without discrete component placement overhead. Its non-clamping range spans −0.5 V to 6.2 V, and it delivers 9 V clamping at 2.66 A I_ZSM with 24 W P_ZSM.

Designed for IEC 1000-4-2 compliance, it operates with 1.3 V forward voltage at 200 mA and exhibits 300 Ω differential resistance at 1 mA bias. Diode capacitance is 110 pF at 4 V reverse bias (1 MHz), critical for high-speed signal integrity in USB, keyboard, and address/data bus applications.

Key Specifications

Pinout & Package

SOT457 (SC-74) surface-mount plastic package with 6 leads, 1.7 mm × 1.3 mm body, 0.95 mm pitch, and 0.26 mm lead thickness. Designed for reflow soldering with exposed soldering points at pins 2 and 5 (common anodes).

Key Features

Applications

Equivalent & Alternatives

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

Compared with PESD5V0S4UD and TPD4E001DRYR, the BZA462A offers balanced performance for 5 V systems: moderate capacitance (110 pF), robust 24 W pulse handling, and proven compatibility with legacy PC peripheral and microcontroller bus layouts.

Availability

BZA462A is available at Aetrix Electronics and suitable for computer interface protection, microprocessor bus shielding, audio/video I/O hardening, and medical equipment front-end ESD mitigation requiring stable component supply and long-term lifecycle support.

Supply support for BZA462A 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, with core expertise in ESD protection, logic, and PowerMOS devices for automotive, industrial, and consumer markets.

The BZA462A belongs to Nexperia's legacy Standard Products ESD protection portfolio, engineered specifically for cost-effective, space-constrained quad-line I/O hardening in legacy and industrial computing platforms.

FAQ

What is the maximum continuous reverse voltage the BZA462A can withstand?

The BZA462A has no specified DC blocking voltage rating; its working voltage is 6.2 V at 1 mA test current. It is not intended for sustained reverse bias above 6.2 V. For continuous DC blocking, external series resistors or voltage-limiting circuitry must be used to ensure reverse current remains below 700 nA at 4 V.

Can the BZA462A be used to protect 3.3 V logic lines?

Yes, but with caution: its 6.2 V working voltage provides adequate margin above 3.3 V nominal, yet clamping begins only after transient exceeds ~6.2 V. For tighter protection, verify that system-level transients do not exceed the 9 V clamping limit under worst-case IEC 1000-4-2 conditions, and confirm downstream IC absolute maximum ratings allow 9 V stress.

How should the two common anode pins (2 and 5) be connected on the PCB?

Pins 2 and 5 must be shorted together on the PCB and connected to a low-inductance ground or V_CC plane. This dual-anode configuration improves current sharing and thermal distribution. Avoid daisy-chaining or routing them separately-both must join at a single low-impedance node near the protected I/O entry point.

Is the BZA462A RoHS compliant and halogen-free?

Yes. As a Nexperia Standard Product manufactured post-2017, the BZA462A meets RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21. The SOT457 package uses lead-free matte tin plating and green molding compound, verified in Nexperia's product change notifications dated 2018 onward.