The DHB34 Series of transient surge suppressors consists of high-energy Metal-Oxide Varistors (MOVs) designed for surge suppression in various industrial environments. These suppressors are particularly suitable for AC mains outdoor and service entrance environments, including distribution panels in buildings. They can also be used in heavy industrial motors, controls, and power supplies in the oil-drilling, mining, transportation fields, HVAC systems, and motor/generator applications.
Key Features
The DHB34 series boasts several notable characteristics, such as:
– Lead-Free, Halogen-Free, and RoHS compliance ensuring they meet modern environmental standards.
– Rigid terminals engineered for secure through-hole solder mounting on printed circuit boards to eliminate the need for screw mounting.
– An extensive operating voltage range from 110V to 750V AC RMS and no derating required up to 85°C ambient temperature.
– Dual-Disc Device: Incorporates two 34mm varistor discs in parallel within a single package for enhanced surge suppression capacity.
– High peak pulse current capability supporting up to 40,000A.
– Energy absorption capability ranging from 220J to 1050J demonstrating robust protection against energy surges.
Agency Approvals
The product has achieved agency approval from UL1449 with the file number E320116, ensuring it meets rigorous safety standards and is suitable for industrial applications.
Absolute Maximum Ratings
The datasheet lists out critical absolute maximum ratings for the DHB34 series, including but not limited to:
– Continuous steady-state applied voltage ranging from 110V to 750V AC RMS.
– DC voltage range of 148V to 970V.
– Peak pulse current of 40,000A for 8/20µs current wave.
– Single pulse energy range from 220J to 1050J for 2ms current wave.
– Operating ambient temperature range of -55°C to +85°C.
– Storage temperature range of -55°C to +125°C.
– Very low temperature coefficient below 0.01% for clamping voltage.
– High-pot encapsulation providing a 2500V isolation voltage capability and a 1000 megohms insulation resistance.
The datasheet cautions that stressors beyond the listed absolute maximum ratings may cause permanent damage to the device. These stresses are considered non-operational, and the device’s performance above the specified ranges is not guaranteed. The specifications provided are subject to change without notice, according to the documentation revised on September 14, 2017, by Littelfuse, Inc.
Manual:
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