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  • Series
  • Model
  • Brand / Made in
  • System voltage: 277/480 V
  • System: 4W+G (Wye)
  • Hybrid MOV-GSG Technology and EMI/RFI filtering
  • UL1449 Type 2 LISTED
  • 50kA Surge Current Rating per mode
  • Extended life with no leakage current
  • Visual LED fault indicator and audible alarm
  • NEMA 6: indoor / outdoor used
  • Hardwired connection


CITEL offers a line of surge protectors for the single and three phase AC networks connected to sensitive equipment: M50F series.
M50F series surge protection devices in metal enclosures belong to a complete family of surge protection devices specifically designed to meet the requirements of the North American surge protection standards: USA and Canada. Respectively, the UL1449 ed4 standard and the C22.2 No.269.1–22.2 No.269.5 standards. 
They are available in all single, dual or three phase configurations and are equipped with various diagnostic options. Housed in a NEMA 6 metal enclosures, total surge capacities Imax = 100 kA. The protection circuit is based on a combination of high energy varistors and filter capacitors to provide a very high discharge current capability with EMI / RFI filtering. Manufactured in accordance with the UL1449 standard, the safe operation is ensured by real-time diagnostics including fault indicators (LEDs), an audible alarm, and remote signal contacts.

  • System voltage: 277/480 V
  • System: 4W+G (Wye)
  • Maximum Operating Voltage: 320 V (L-G / L-N), 280 V (N-G), 560 V (L-L)
  • Operating Current Ic: 25 mA per line 
  • Follow current If: None
  • Short Circuit Current Rating SCCR: 200 kA
  • Maximum Leakage Current Ipe: None
  • Maximum Recommanded fuse: 200A, Class J
  • Frequency F: 50-60 Hz
  • EMI/RFI filtering: yes
  • Nominal discharge current In (8-20): 20 kA
  • Maximum Discharge Current: L-G: 50 kA, N-G: 100 kA
  • Impulse Discharge Current per phase Iimp (10-350): 4 kA
  • Total Maximal Discharge Current Itotal (8-20): 100 kA
  • Total Maximal Discharge Current Itotal (10-350): 15 kA 
  • Let through Voltage Ures (V) at 20kA: 1900 V (L-G), 1500 V (L-N / N-G), 3100 V (L-L)
  • Voltage Protection Level: 1500 V (L-G), 1200 V (L-N / N-G), 2500 V (L-L)
  • Shipping Dimensions: 3.46 x 4.02 x 2.35 inchs
  • Shipping Weight: 2.4 lbs
  • Standard Compliance or recognition: UL1449 ed4 File: E326289: Type 2 / IEC 61643-11 ed2: Type 2 
  • Visual disconnection indicator: LED
  • Sound disconnection indicator: Continuous Buzzer
  • Wiring type: AWG 12 wires
  • Maximum altitude: 6500 ft
  • Operating Temperature: -40 / +185 °F
  • Housing-Enclosure material: Aluminum cast
  • Mounting type: Side or back nipple (Version A or B) Threaded (M22). NPT 1/2 adaptor available
  • Environmental rating: IP66 / NEMA 6
  • Location Installation: Indoor / Outdoor
  • LED ON = normal operation
  • LED OFF (one or more) = Fault, check phase voltage & connections. If OK, replace unit
  • Audible Alarm ON = Fault, check phase


cách lắp đặt đấu nối tủ chống sét 1 pha M50 vào tủ điện



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