EMC solutions provider EMIS now offers a range of EMI powerline filters designed to protect sensitive electrical and electronic equipment against High-Altitude Electromagnetic Pulse (HEMP) and conducted Electromagnetic Interference (EMI/RFI) resulting from high-energy electromagnetic events, including nuclear-induced electromagnetic disturbances and lightning-related transients.
The EMIS SMF913 and TMF913HEMP EMI Power Line Filters provide single phase and three phase configurations, and suitable for a wide range of AC and DC facility power applications. With current ratings from 6 A to 3000 A, they are ideal for supporting applications ranging from control panels and communication equipment to high-current facility power distribution systems. The EMIS HEMP filter design features Integrated 80 kA peak surge-current protection (8/20μs) which provides protection against lightning-induced surges and power switching transients.
Standard performance models provide 100dB insertion loss from 30MHz to 18GHz, followed by 90dB attenuation up to 40GHz. Extended-performance models provide 100 dB attenuation from 14 kHz to 40 GHz, offering enhanced protection against both low-frequency conducted interference and high-frequency electromagnetic disturbances. Built-in discharge resistors safely dissipate energy stored in internal capacitors after power is switched off, improving operator safety and reducing maintenance hazards
The EMIS HEMP filters are designed in accordance with the requirements of MIL-STD-188-125-1/2 and MIL-PRF-15733J, supporting HEMP-hardened facility and high-performance EMI/RFI protection applications and tested in accordance with MIL-STD-188-125-1/2 to withstand specified E1 Short Pulse and E2 Intermediate Pulse current injection levels under common-mode and line-to-ground conditions, with E1 residual current limited to ≤10 A and no damage to the filter during E2 testing
The HEMP filters help to prevent equipment malfunction, reduce communication and control errors, minimise system downtime and enhance the reliability and service life of connected equipment.
