Description
The LA Series Radial Lead Varistors by Littelfuse are transient voltage surge suppressors designed for continuous operation across AC power lines. These varistors are recognized by UL, space-efficient, and offered with various lead form options. They come in four model sizes: 7mm, 10mm, 14mm, and 20mm, with a VMAC(RMS) voltage range from 130V to 1000V. Models in the series can handle energy absorption up to 360J, with some providing standard (suffix ‘A’) or lower clamping voltages (‘B’). For details on part numbers and specifications, refer to the LA Series Device Ratings and Specifications Table.
Agency Approvals
The series has acquired approvals from agencies like AVS with file numbers such as E320116, E135010, LR91788, and 42201-006. These varistors are lead-free, halogen-free, RoHS compliant, and can operate without derating up to 85°C ambient.
Features
Product features include a wide operating voltage range from 130V to 1000V AC(RMS), high energy absorption up to 360J, suitability for operation in high ambient temperatures, and availability in both tape and reel or bulk pack. These varistors meet environmental and safety standards.
Absolute Maximum Ratings and Product Specifications
Absolute maximum ratings outline the limits for continuous steady-state applied voltage, pulse current capacity, energy range, and operating temperatures. The LA Series should not be stressed beyond these ratings to avoid permanent damage. Operating temperatures range is from -55°C to +85°C with encapsulation that must withstand specified isolation voltages.
LA Series Ratings & Specifications
At 85°C, various models in the LA Series offer maximum ratings for continuous and transient varistor voltages, clamping voltages, and energy absorption, detailed through extensive tables showcasing min/max values and capacities. Each varistor has different characteristics like peak pulse current, capacitance, and DC test voltage, optimizing the devices for specific applications.
Part Numbers
Part numbers are available for varistors across different series, correlating to model sizes and disc diameters, identified by specific brands such as V13OLA1P, V14OLAZOAP, and available in varied forms to meet project specifications. Detailed branding information ensures accurate selection for applications.
Specifications for the LA Series Radial Lead Varistors are subject to change, and the most recent revision is noted as of 05/23/14.
References:
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