Littelfuse presents the LA Varistor Series, a collection of radial leaded varistors (MOVs) designed for continuous operation across AC power lines. These varistors are recognized for their compact design, which requires minimal mounting space, and are available in several standard lead form options.
The LA Varistor Series comes in four model sizes: 7mm, 10mm, 14mm, and 20mm; featuring a VM(AC)RMS voltage range of 130V to 1000V, and energy absorption capacity up to 360J. Specific LA Series models offer clamping voltage options indicated by suffixes ‘A’ for standard models and ‘B’ for models with lower clamping voltage.
Agency Approvals
The series has received agency approvals including UL1449, IEC 60950-1 (Annex Q) specifically for the 14mm and 20mm models, and complies with CECC 42201-006, IEC 61051-1 and IEC 61051-2 standards.
Features and Benefits
- Lead-free, Halogen-Free, and RoHS compliant
- Energy absorption capability (Wmax) up to 360J
- Wide operating voltage range from 130V to 1000V (AC)
- No performance derating up to 85°C ambient temperature
- Available in tape and reel or bulk pack for convenience
- High insulation resistance and dielectric strength for safety and reliability
Absolute Maximum Ratings
The datasheet details absolute maximum ratings and specifications, such as continuous steady-state applied voltage (130 to 1000V AC), transient peak pulse current (up to 6500A for 8/20us current wave), and single pulse energy range from 11 to 360J for 10/1000us current wave. It specifies the operating ambient temperature range (from -55°C to +85°C) and storage temperature range (from -55°C to +125°C). It notes the importance of abiding by these absolute maximum ratings, as exceeding them could permanently damage the device.
With extensive range options listed, including maximum ratings at 85°C and typical specifications at 25°C, each varistor is named with a unique part number. This identification ensures precision in selecting the right varistor for specific applications.
As of the last revision on 12/12/18, Littelfuse indicates that specifications are subject to change without notice, urging users to review these periodically for the most current information.
References:
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