Overview of Metal-Oxide Varistors (MOVs) Low Profile Application Specific Varistors RA Series
Littelfuse’s RA Series transient surge suppressors are advanced Metal-Oxide Varistors (MOVs) featuring a low-profile box design for secure circuit-board mounting. Their unique construction ensures mechanical stability and enables operation under significant vibration without loss of performance, making them ideal for stringent industrial environments.
Key Features:
- Lead-free/RoHS compliant versions available
- Stable up to 125°C ambient temperature without derating
- Voltage ratings up to 275V MIACIRMS; Energy levels up to 140J
- Three model sizes: RA8, RA16, and RA22 Series
- Preserving mechanical stability thanks to a precise seating plane
Applications:
The varistors are utilized across various high-demand applications, including automotive motor-control, telecommunication, and military purposes.
Agency Approvals:
These devices meet established safety standards, as indicated by the UL1449 approval.
Absolute Max Ratings: For the individual members of this series, refer to the Device Ratings and Specifications chart. Ratings detail continuous voltage range, transient peak pulse current, single-pulse energy range, and operating and storage temperature ranges.
Device Ratings & Specifications:
Specifications such as varistor voltage, clamping voltage, and capacitance are given for a wide variety of models under varying test conditions, including max clamping voltage and typical capacitance at specific frequencies and voltages.
The provided CAUTION statement warns against operating the device beyond the listed ‘Absolute Maximum Ratings’ to prevent potential damage.
Model Information and Ratings:
The datasheet presents detailed specifications for each model in the RA8, RA16, and RA22 series. This includes the maximum rating at a standard temperature of 125°C, continuous voltage RMS, and transient peak current along with varistor voltage, clamping voltage, and typical capacitance for numerous part numbers across series.
The Littelfuse resources include up-to-date datasheets, informing users that specifications can change and providing revision dates for reference.
References:
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