Description
The Littelfuse LA Series comprises radial leaded varistors designed for consistent performance across AC power lines. Highlighted by its compact footprint, the series boasts models ranging in size from 7mm to 20mm. Users can select from a voltage span of 130V to 1000V, complemented by a notable energy absorption capacity of up to 360 joules.
Agency Approvals
The series has received certification from various agencies, confirmed by listed agency file numbers inclusive of E320116, E56529, E135010, 116895E, and LR91788.
Features
Each varistor adheres to RoHS standards, ensuring lead-free compliance. Other key features include:
- A maximum energy absorption capability (W-M) of 360J
- An expansive operating voltage range of 130V to 1000V AC, maintained even in environments with temperatures up to 85°C
- Options for packaging include tape and reel or bulk pack for added flexibility
Absolute Maximum Ratings
The absolute maximum ratings for the LA Series detail the thresholds beyond which the device may incur damage. These limits include:
- Continuous Steady State Applied Voltage: AC Voltage Range of 130 to 1000V, DC Voltage Range of 175 to 1200V
- Peak Pulse Current: accommodating 1200 to 6500A for an 8/20μs current wave
- Single Pulse Energy Range: between 11 to 360J for a 10/1000μs current wave
- Operating Ambient Temperature Range: from -55 to +85°C, while storage temperatures extend to +125°C
- Insulation Resistance: robust at minimum 1000MΩ
Furthermore, the varistors show a minimal temperature coefficient of clamping voltage at specified test current, and incorporate a high-potency encapsulation offering a Hi-Pot Encapsulation (Isolation Voltage Capability) of 2500V – ensuring durability during high stress conditions.
Important Notice
The document underscores that exceeding the specified ‘Absolute Maximum Ratings’ can result in irreversible harm to the varistor. Such stress ratings should not be mistaken for operating conditions. Complete specifications can be accessed on the Littelfuse website, with up-to-date details at any user’s disposal.
Manual:
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