C-III Series Metal-Oxide Varistors (MOVs)
The C-III Varistor Series by Littelfuse offers advanced Metal-Oxide Varistors specifically designed for high surge energy and multiple pulse absorption. This series is particularly suited to AC line Transient Voltage Surge Suppressor (TVSS) products and similar high transient energy and peak current environments, distinguished by its high surge absorption (WTM 40J to 530J over 2ms) and peak pulse current capabilities (Izm 3500A to 9000A with an 8/20us waveform).
Key Features and Approvals
The C-III varistors are RoHS compliant and lead-free, ensuring their suitability for environmentally conscious applications. They range in continuous steady-state applied voltage from 130V to 680V (VMACIRMS) and provide no derating up to an ambient temperature of 85°C. The varistors are available in 10mm, 14mm, and 20mm disc sizes, with a variety of lead options, including those suitable for tape and reel automated insertion. Agency approvals include E320116, LR91788, 116895E, and 42201-006.
Absolute Maximum Ratings and Part Number Branding
The datasheet specifies absolute maximum ratings for DC voltage range, single-pulse peak current, single-pulse energy, operating and storage temperature range, temperature coefficient, and Hi-Pot encapsulation insulation voltage capability. The maximum ratings emphasize the importance of adhering to specified limits to avoid permanent device damage.
Product Range and Ratings
The series offers a comprehensive selection of models with various energy and peak current ratings, encapsulated under standard and RoHS compliant part numbers. For instance, product part numbers like V130LASCP and V130LASC demonstrate energy absorption as high as 40J and peak currents up to 3500A for a single pulse. At the higher end, part numbers such as V250LA40CPX620 exhibit energy absorption going up to 300J and peak currents up to 9000A. The datasheet details the full range of product variations, including different VMACIRMS values, pulse energy (W), and pulse current ratings (A), providing reliable surge protection solutions across a wide range of electrical applications.
Changes in specifications may occur, and current information can be found on the Littelfuse website. The data provided in this datasheet is from the revision dated October 29, 2009.
References:
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