NXP Semiconductors BZA862A,115

Overview

BZA862A from Nexperia is a quadruple ESD transient voltage suppressor diode in SOT353 (SC-88A) package with common anode configuration, 6.2 V working voltage (IZ = 1 mA), ≤200 pF capacitance at 0 V, ≤700 nA reverse leakage at 4 V, and 2.9 A non-repetitive peak reverse current for protecting four I/O lines in high-speed digital interfaces.

For engineers reviewing the BZA862A datasheet, BZA862A pinout, BZA862A application, or BZA862A equivalent, this device is selected for compact multi-line ESD protection where low clamping voltage, low capacitance, and space-constrained PCB layouts are critical - especially in USB, HDMI, and parallel bus signal paths.

Technical Context

The BZA862A integrates four monolithic Zener-based ESD protection diodes sharing a single anode terminal, enabling coordinated clamping of up to four signal lines to ground during ±8 kV IEC 61000-4-2 ESD events. Its differential resistance of ≤300 Ω at 1 mA ensures low dynamic impedance during transient suppression.

Designed for surface-mount implementation in SOT353, the device relies on minimal PCB trace inductance for effective clamping - parasitic inductance directly impacts peak clamping voltage (V = L·di/dt), making placement adjacent to connectors essential for achieving specified 6.51 V max clamping under standardized test conditions.

Key Specifications

Pinout & Package

SOT353 (SC-88A) is a plastic surface-mounted package with 5 leads, 2.2 mm × 1.35 mm body size, 0.65 mm lead pitch, and 0.1 mm minimum standoff. Pin 2 is the common anode; pins 1, 3, 4, and 5 are individual cathodes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ESD5Z6.0T1G and TPD4E001DQAR, the BZA862A delivers balanced performance: moderate capacitance (200 pF) with proven 2.9 A surge capability in the smallest quad-channel footprint (SOT353), making it optimal for cost-sensitive, space-constrained 100–480 Mbps interfaces where full GHz bandwidth is not required.

Availability

BZA862A is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI DDC channel hardening, and industrial keypad interface designs requiring stable component supply and long-term production continuity.

Supply support for BZA862A 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, logic devices, and PowerMOS solutions, with manufacturing rooted in automotive-grade quality and reliability standards.

The BZA800A-series was developed specifically for compact, multi-line ESD protection in consumer and computing interfaces - prioritizing low capacitance, repeatable clamping behavior, and compatibility with automated SMT assembly processes.

FAQ

What is the maximum clamping voltage of the BZA862A during an 8 kV ESD event?

The BZA862A does not specify a single "clamping voltage" value in its datasheet; instead, clamping performance depends on transient current magnitude and di/dt. Under IEC 61000-4-2 testing, the BZA862A achieves effective suppression with a working voltage of 5.89–6.51 V at 1 mA and a differential resistance ≤300 Ω, resulting in typical clamped voltages below 12 V for 2.9 A peak currents. Actual clamping in-system is influenced by PCB layout inductance.

Can the BZA862A be used for bidirectional signal lines like USB D+ and D−?

Yes, the BZA862A supports bidirectional protection because each cathode-to-common-anode path functions as a unidirectional Zener clamp, and pairing two channels (e.g., pins 1 & 3 for D+ and D−) with the common anode tied to ground provides symmetrical clamping for both polarities of ESD transients. This configuration is validated in NXP's application note MGT581 for computer interface protection.

What is the thermal resistance junction-to-ambient for the BZA862A in SOT353 package?

According to the official Nexperia (formerly NXP) datasheet, the thermal resistance from junction to ambient (R_{th j-a}) for the BZA862A in SOT353 package is 370 K/W under conditions where all four diodes are loaded. This value assumes standard JEDEC test board conditions and guides derating of total power dissipation (P_tot = 335 mW at 25 °C) at elevated ambient temperatures.

Is the BZA862A RoHS compliant and halogen-free?

Yes, the BZA862A meets RoHS Directive 2011/65/EU requirements and is halogen-free per Nexperia's product compliance documentation. The SOT353 package uses lead-free matte tin plating, and the device carries the "Nexperia Green" designation, confirming absence of brominated flame retardants, chlorine, and other restricted substances as defined in IEC 61249-2-21.

How does the temperature coefficient of the BZA862A affect its working voltage over temperature?

The BZA862A has a positive temperature coefficient (SZ) of +1.8 mV/K at I_Z = 1 mA, meaning its working voltage increases by approximately 1.8 mV per Kelvin rise in junction temperature. Over a −40 °C to +125 °C range, this results in a total V_Z shift of about ±300 mV - a known and accounted-for characteristic in ESD design margins, ensuring reliable clamping across automotive and industrial temperature ranges.