onsemi NZ9F8V2ST5G

Overview

NZ9F8V2ST5G from onsemi is a 250 mW, 8.02–8.36 V Zener voltage regulator diode in SOD−923 package, designed for precision voltage clamping and overvoltage protection in space-constrained portable electronics. It features 30 Ω max Zener impedance at 5 mA test current, 5 μA max reverse leakage at 6.4 V, and ±3.2 mV/°C temperature coefficient.

For engineers reviewing the NZ9F8V2ST5G datasheet, pinout, applications, or equivalent options, key selection criteria include its tight 8.2 V nominal Zener voltage tolerance (±2.1%), low 0.40 mm body height, AEC−Q101 qualification, 16 kV HBM ESD rating, and suitability for high-density PCBs in battery-powered systems.

Technical Context

This device operates as a two-terminal shunt voltage reference, maintaining stable regulation by conducting reverse current above its specified Zener breakdown threshold. Its thermal resistance of 500 °C/W and 2.0 mW/°C derating above 25°C define its power handling limits under ambient conditions.

The SOD−923 package enables surface-mount assembly with MSL 1 reflow compatibility up to 260°C, while its 100% matte tin lead finish and void-free epoxy meet UL 94 V−0 flammability requirements for reliability-critical portable applications.

Key Specifications

Pinout & Package

SOD−923 surface-mount package: 1.00 mm × 0.60 mm body, 0.40 mm height, cathode-marked top-side with microdot or alphanumeric code. RoHS-compliant, Pb-free, matte tin finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener regulation applications.

Compared with BZX584-C8V2 and MMSZ4687T1G, NZ9F8V2ST5G offers the smallest footprint and AEC−Q101 qualification, making it optimal for automotive and ultra-thin portable designs where board area and reliability certification are primary constraints.

Availability

NZ9F8V2ST5G is available at Aetrix Electronics and suitable for smartphone power management, wearable ESD protection, and automotive cabin controller applications requiring stable component supply and long-term lifecycle support.

Supply support for NZ9F8V2ST5G 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 delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and edge applications.

NZ9F8V2ST5G belongs to the NZ9FxxxST5G Zener regulator family, engineered specifically for miniaturized, high-reliability voltage clamping in portable and automotive electronics where space, ESD immunity, and AEC−Q101 compliance are critical.

FAQ

What is the nominal Zener voltage of NZ9F8V2ST5G?

The nominal Zener voltage of NZ9F8V2ST5G is 8.2 V, with a guaranteed range of 8.02 V to 8.36 V at 5 mA test current. This tight tolerance supports precise voltage clamping in 8.2 V rail protection circuits. The device's ±3.2 mV/°C temperature coefficient ensures predictable drift across its full −65°C to +150°C operating range. NZ9F8V2ST5G maintains this specification under standard JEDEC test conditions per its onsemi datasheet Rev. 3.

Is NZ9F8V2ST5G qualified for automotive use?

Yes, NZ9F8V2ST5G is AEC−Q101 qualified and PPAP capable, as confirmed by its SZ-prefix variant designation and explicit listing in the onsemi qualification documentation. It meets automotive-grade reliability requirements including temperature cycling, humidity testing, and mechanical shock. NZ9F8V2ST5G is suitable for cabin controllers, body electronics, and infotainment systems where certified component reliability is mandatory.

What package type does NZ9F8V2ST5G use?

NZ9F8V2ST5G uses the SOD−923 surface-mount package (Case 514AB), measuring 1.00 mm × 0.60 mm with a 0.40 mm maximum height. Its compact dimensions and MSL 1 rating allow direct placement on high-density PCBs without baking. The package features 100% matte tin leads and void-free thermosetting epoxy compliant with UL 94 V−0. NZ9F8V2ST5G's marking includes cathode identification via microdot or alphanumeric code per onsemi's marking diagram.

What is the maximum power dissipation for NZ9F8V2ST5G?

NZ9F8V2ST5G has a maximum steady-state power dissipation of 250 mW at 25°C ambient on an FR−4 board, derating linearly at 2.0 mW/°C above that temperature. Its thermal resistance is 500 °C/W junction-to-ambient. This rating assumes minimum pad design per JEDEC standards; actual dissipation must be validated against board layout, airflow, and adjacent heat sources. NZ9F8V2ST5G's power capability is optimized for low-duty-cycle clamping rather than continuous regulation.

Does NZ9F8V2ST5G have ESD protection built-in?

Yes, NZ9F8V2ST5G has an ESD rating of Class 3 (>16 kV) per the Human Body Model, verified per AEC−Q101 test requirements. This intrinsic robustness eliminates the need for additional discrete ESD protection in many portable applications. The device achieves this through optimized junction design and packaging, not external circuitry. NZ9F8V2ST5G's ESD performance is fully characterized and guaranteed across its rated temperature range, supporting reliable operation in handheld and wearable electronics.