ZA Series Metal-Oxide Varistors (MOVs) Overview
The ZA Series transient voltage surge suppressors from Littelfuse are radial leaded varistors, which are designed for shielding low and medium-voltage circuits and systems from voltage surges. These suppressors are essential for safeguarding motor control, telecom, solenoid, and power supply circuits, by maintaining the integrity of the system and its components.
They come in five model sizes ranging from 5mm to 20mm, thus offering a versatile solution suitable for various design requirements. These varistors accommodate a wide operating voltage spectrum, with AC voltage ratings from 4V to 460V, and DC voltage ratings from 5.5V to 615V, permitting their use across diverse applications.
Features and Approvals
The ZA Series includes models that are lead-free, halogen-free, and RoHS compliant, indicating an adherence to regulatory requirements and a commitment to environmental sustainability. Varistors in this series offer a standard radial lead package, which is suitable for both hard-wired or printed circuit board designs, and come in various packaging options such as tape and reel or bulk pack.
Agency approvals for the ZA Series include certifications from Underwriters Laboratories (UL), and conformance to European CECC 42201-006, International Electrotechnical Commission (IEC) standards 61051-1 and 61051-2, and IEC 60950-1 (Annex Q).
Absolute Maximum Ratings & Electrical Characteristics
The datasheet details the absolute maximum ratings which highlight the strict operating limits of the ZA Series, such as peak pulse current ranging from 50 to 6500A and energy absorption capability between 0.1J to 52J, indicating robust energy handling capacity for various surge situations. The operating ambient temperature range is specified from -55°C to +85°C, ensuring the varistors can perform reliably in a wide range of environmental conditions.
The electrical characteristics of the varistors, such as clamping voltage and capacitance, are listed in the specifications table. Different models are compared according to their maximum peak voltage for 8/20µs current wave, clamping energy for 10/1000µs current wave, and typical capacitance at 1MHz, offering detailed information for engineering analysis and selection.
Part Numbers and Branding
The datasheet provides a comprehensive part number and branding index for quick identification and ordering of specific varistor models within the ZA Series. With part numbers such as VBZAOSP and VIZZAIP, this detailed list allows for precise specifications and ordering processes.
Note that the 2018 Littelfuse, Inc. specifications may be subject to change and users are advised to consult the latest revisions for up-to-date information.
References:
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