CH Series Surface Mount Varistors (MOVs) Datasheet

Category: Electronics, Littelfuse Inc, Resistors

Description

The CH Series transient surge suppressors feature small, metal-oxide varistors (MOVs) created in a leadless chip form, targeted for various applications, including low voltage DC and off-line board-level protection. The CH Series delivers a compact and lightweight solution while enhancing equipment design reliability. Available in a voltage range of 14V to 275V, and energy ratings up to 8J, the datasheet suggests checking out the Littelfuse Multilayer Suppressor Series for additional options.

Agency Approvals

The CH Series varistors are recognized under the Underwriters Laboratories components program, with a specific mention of UL1449 standards, holding an Agency File Number of E320116.

Features

Compliance with RoHS guidelines.
Offered as a leadless, surface-mount chip sized at 5 x 8mm.
Supplied in either tape and reel or bulk pack formats.
No derating is required up to an ambient temperature of 125°C.
High surge capacity rated up to 600A.

Absolute Maximum Ratings

For individual ratings of CH Series elements, a detailed chart titled “Device Ratings and Specifications” can provide specific figures. Key ratings include:

Continuously applied steady-state AC voltage range from 14 to 275V.
DC voltage range spanning from 18 to 369V.
A transient peak pulse current range of 100 to 600A for an 8/20μs current waveform.
Single pulse energy range of 1.0 to 8.0J for a 10/100μs current wave.

The operating ambient temperature range is noted at -55 to +125°C, with a storage temperature span of -55 to +150°C. The CH Series also exhibits a temperature coefficient of clamping voltage at a specified test current of less than 0.01%/°C.

CAUTION: The datasheet cautions against subjecting the varistors to stresses above the ‘Absolute Maximum Ratings,’ as this may cause permanent damage to the device. These stress ratings are purely indicative, and operating the device under conditions above these specified in the operations section is not implied to be suitable.

Additional Information

The datasheet adds that specifications may change without notice and that it has been last revised as of 06/19/19, urging users to consult with Littelfuse, Inc. for updated data. Further resources such as more detailed datasheets, additional product information, and sample orders are accessible through designated channels.