onsemi NZ9F12VT5G

Overview

NZ9F12VT5G from onsemi is a 12 V ±5% Zener diode in SOD-923 package, rated for 250 mW steady-state power dissipation, with 30 Ω maximum Zener impedance at 5 mA test current and 0.1 μA reverse leakage at 9.0 V, used for precision voltage clamping and overvoltage protection in space-constrained portable electronics.

For engineers reviewing the NZ9F12VT5G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), low-profile SOD-923 footprint (1.00 mm × 0.60 mm × 0.40 mm), Class 3 ESD rating (>16 kV HBM), AEC-Q101 qualification status, and thermal resistance of 500 °C/W.

Technical Context

This device operates as a two-terminal voltage reference and transient suppressor, leveraging silicon PN-junction Zener breakdown at nominal 12 V. Its electrical behavior is defined under pulsed test conditions (IZT = 5 mA, TA = 25 °C) with specified temperature coefficient (+6 mV/°C) and capacitance (80 pF at VR = 0 V, f = 1 MHz).

The SOD-923 package enables high-density PCB placement with MSL 1 reflow compatibility (260 °C peak), matte tin lead finish, and UL 94 V-0 compliant epoxy molding compound - critical for handheld and automotive-grade designs requiring robust thermal and mechanical reliability.

Key Specifications

Pinout & Package

SOD-923 surface-mount package with cathode marked by polarity band; body dimensions 1.00 mm × 0.60 mm × 0.40 mm; mounting position unrestricted; qualified for 260 °C reflow per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX584-C12 and MMSZ5242B, NZ9F12VT5G uniquely balances AEC-Q101 qualification, 250 mW capability, and ultra-compact SOD-923 size - making it optimal for automotive and portable designs where reliability, density, and thermal constraints intersect.

Availability

NZ9F12VT5G is available at Aetrix Electronics and suitable for smartphone power management, automotive infotainment interfaces, and wearable sensor nodes requiring stable component supply and long-term lifecycle support.

Supply support for NZ9F12VT5G 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 is a global semiconductor manufacturer specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The NZ9F series is part of onsemi's precision Zener regulator portfolio, engineered specifically for space-constrained, high-reliability applications demanding tight voltage tolerance, low leakage, and robust ESD immunity.

FAQ

What is the Zener voltage tolerance of NZ9F12VT5G?

The NZ9F12VT5G has a Zener voltage range of 11.4 V to 12.6 V at IZT = 5 mA and TA = 25 °C, corresponding to a ±5% tolerance. This specification is verified per onsemi's published Electrical Characteristics table and applies directly to the NZ9F12VT5G device marking "L*" on the SOD-923 package. The tolerance remains valid across the full operating temperature range when used within derated power limits.

Is NZ9F12VT5G qualified for automotive applications?

Yes, NZ9F12VT5G is AEC-Q101 qualified and PPAP capable, as confirmed in the onsemi datasheet revision history and device marking notes. While the base NZ9F12VT5G variant carries standard industrial qualification, its SZNZ9F12VT5G sibling is explicitly designated for automotive use - and both share identical electrical and thermal specifications. NZ9F12VT5G is routinely deployed in automotive infotainment and body electronics where AEC-Q101 compliance is required.

What is the maximum operating temperature for NZ9F12VT5G?

The NZ9F12VT5G supports a junction and storage temperature range of −65 °C to +150 °C, per the Maximum Ratings table in the official onsemi datasheet. At ambient temperatures above 25 °C, power must be linearly derated at 2.0 mW/°C, limiting usable dissipation to 200 mW at 50 °C ambient. Thermal resistance (RJA = 500 °C/W) governs this relationship, and the device remains fully functional within these bounds when mounted on FR-4 PCB with minimum pad layout.

Does NZ9F12VT5G have a built-in ESD protection rating?

Yes, NZ9F12VT5G features an ESD rating of Class 3 (>16 kV) per Human Body Model (HBM), as stated in the Specification Features section of the onsemi datasheet. This intrinsic protection eliminates the need for additional discrete ESD suppressors in many I/O protection schemes. The rating is achieved through optimized junction design and packaging, and applies to both cathode-to-anode and anode-to-cathode stress configurations.

What is the forward voltage drop of NZ9F12VT5G?

The forward voltage (VF) of NZ9F12VT5G is specified as ≤0.9 V at IF = 10 mA and TA = 25 °C, consistent across the entire NZ9F series. This parameter reflects the diode's behavior in forward conduction mode and is relevant for polarity-check circuits or dual-use protection schemes. The value is measured under standardized test conditions and does not vary significantly between individual NZ9F12VT5G units due to tight process control.