onsemi NZL7V5AXV3T1

Overview

NZL7V5AXV3T1 from onsemi is a dual common-anode unidirectional ESD protection diode in SC−89 package, featuring 7.5 V nominal breakdown voltage (VBR), 5.0 V working peak reverse voltage (VRWM), and 13.5 V clamping voltage (VC) at 1.0 A surge current. It delivers 75 W peak pulse power, <1.0 µA reverse leakage at VRWM, and meets IEC61000−4−2 Level 4 (±8 kV contact/±15 kV air) for USB, I/O, and microprocessor interface protection.

For engineers reviewing the NZL7V5AXV3T1 datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional configuration capability via common-anode topology, MSL 1 reflow compatibility (260°C), AEC−Q101 qualification, and low 0.9 V forward voltage at 10 mA - critical for low-power ESD-critical signal lines.

Technical Context

This device implements a monolithic dual-junction silicon structure with shared anode (Pin 3) and separate cathodes (Pins 1 & 2), enabling independent protection of two signal lines in one compact footprint. Its unidirectional operation supports standard I/O rail-to-rail clamping while maintaining sub-1 µA leakage at 5.0 V reverse bias.

The SC−89 package enables either two discrete unidirectional channels or a single bidirectional configuration by external routing. Thermal resistance (R_JA = 525°C/W) and 240 mW FR−5 board power dissipation define its transient energy handling limits under repetitive ESD stress per IEC61000−4−2.

Key Specifications

Pinout & Package

SC−89 package: void-free thermosetting plastic case, matte tin lead finish, 260°C max reflow, MSL 1 rating. Dimensions: 1.60 mm (L) × 0.85 mm (W) × 0.70 mm (H).

Key Features

Applications

Equivalent & Alternatives

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

Compared with NZL6V8AXV3T1G and SZNZL7V5AXV3T1G, the NZL7V5AXV3T1 offers optimal balance of 5.0 V VRWM headroom and 13.5 V clamping for 5 V tolerant interfaces, while the SZ variant adds manufacturing rigor without altering electrical behavior - making it the default choice for industrial applications and the SZ version mandatory for automotive production release.

Availability

NZL7V5AXV3T1 is available at Aetrix Electronics and suitable for USB interface protection, industrial serial communication, and microprocessor GPIO hardening requiring stable component supply and long-term lifecycle assurance.

Supply support for NZL7V5AXV3T1 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensor, and ESD protection solutions for automotive, industrial, and consumer markets.

The NZL7V5AXV3T1 belongs to the NZL5V6AXV3T1 Series of unidirectional ESD protection diodes designed specifically for space-constrained, high-reliability I/O protection in computing, medical, and automotive electronics.

FAQ

What is the maximum clamping voltage of NZL7V5AXV3T1 during an ESD event?

The NZL7V5AXV3T1 exhibits a maximum clamping voltage (VC) of 13.5 V when subjected to a 1.0 A 8/20 µs surge current, as specified in the Electrical Characteristics table. This value ensures downstream components like USB transceivers or microcontroller I/O pins remain within safe voltage limits during IEC61000−4−2 Level 4 ESD strikes. The clamping performance is validated across temperature and production lots per onsemi's qualification standards.

Can NZL7V5AXV3T1 be used for bidirectional signal line protection?

Yes, NZL7V5AXV3T1 supports bidirectional configuration by externally connecting Pins 1 and 2 (cathodes) to form a single channel with symmetrical clamping behavior. While internally unidirectional, this wiring enables protection of AC-coupled or differential lines such as USB D+/D− or RS-485 A/B, achieving effective bidirectional clamping without additional components.

Is NZL7V5AXV3T1 suitable for automotive applications?

The standard NZL7V5AXV3T1 is AEC−Q101 qualified and operates across −55°C to +150°C junction temperature, making it technically suitable for automotive environments. However, for production automotive programs requiring PPAP documentation and enhanced traceability, the SZNZL7V5AXV3T1G variant - identical electrically but with SZ-prefix process controls - must be selected per OEM requirements.

What is the thermal resistance and power derating behavior of NZL7V5AXV3T1?

NZL7V5AXV3T1 has a junction-to-ambient thermal resistance (R_JA) of 525°C/W on FR−5 board. Its steady-state power dissipation derates linearly above 25°C at 1.9 mW/°C, reaching zero at approximately 145°C ambient. This derating curve, shown in Figure 4 of the datasheet, defines safe continuous power handling under sustained overvoltage conditions - critical for thermal design in enclosed enclosures.

How does the SC−89 package of NZL7V5AXV3T1 compare to SOT-23 for layout density?

The SC−89 package of NZL7V5AXV3T1 measures 1.6 mm × 0.85 mm, offering ~40% smaller footprint than standard SOT-23 (3.0 mm × 1.4 mm). Its three-terminal configuration with shared anode eliminates need for separate ground traces per channel, reducing routing congestion. The package also supports MSL 1 reflow (260°C), enabling compatibility with high-volume automated assembly without moisture sensitivity concerns.