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Instantly add the BXT ML4 BD EX 24 Surge Arrester and 50,000+ more product series to your store or catalog  
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DEHN Surge Arrester, BXT ML4 BD EX 24

BXT ML4 BD EX 24 Surge Arrester

Brand: DEHN, Inc
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Space-saving surge arrester module with LifeCheck feature for protecting two pairs of intrinsically safe measuring circuits and bus systems, meets FISCO requirements. 

ATEX. Insulation strength >500 V line-earth. 

If LifeCheck detects thermal or electrical overload, the arrester has to be replaced. 

This status is indicated contactless by the DEHNrecord LC / SCM / MCM.
Features
  • For universal use, with LifeCheck monitoring function
  • Self-capacitance and self-inductance negligibly small
  • For installation in conformity with the lightning protection zone concept at the boundaries from 0B-2 and higher

Specifications

Brand

Approvals & Certifications

  • IEC 61643-21, EN 61643-21, UL 497B
  • UP to SIL 3

Approvals & Certifications

  • ATEX (KEMA 06-ATEX-0274 X: II 2 (1) G Ex ia [ia Ga] IIC T4 to T6 Gb, II 2 G Ex Ib IIC T4 to T6 Gb)
  • CE
  • CSA & USA Hazloc (70000011: Class I, Div. 1, Class I, Zone 1 & Ex ia [ia] IIC T4 to T6)
  • GOST
  • IECEx (DEK 11.0078X: Ex ia [ia Ga] IIC T4 to T6 Gb, Ex Ib IIC T4 to T6 Gb)

Capacitance

  • Capacitance Line-Line: ≤ 0.8 NF
  • Capacitance Line-PG: ≤ 16 PF

Current

  • C2 Nominal Discharge Current (8/20 µs) Per Line: 5 KA
  • C2 Total Nominal Discharge Current (8/20 µs): 20 KA
  • D1 Lightning Impulse Current (10/350 µs) Per Line: 1 KA
  • D1 Total Lightning Impulse Current (10/350 µs): 4 KA

Enclosure, Body Material

  • Polyamide

Environmental Protection

  • IP20

Frequency

  • Cut-Off Frequency Line-Line: 7.7 MHz

Input

  • Maximum

Operating Temperature

  • -40° to 80° C (-40° to 176° F)

Operating Voltages

  • Maximum

Resistance

  • Series Resistance Per Line: 1 ohm

Voltage

  • Nominal Voltage: 24 V
  • Voltage Protection Level Line-Line at 1 kV/µs C3 (Uₚ): ≤ 45 V
  • Voltage Protection Level Line-Line for Iₙ C2 (Uₚ): ≤ 52 V
  • Voltage Protection Level Line-Line for Iᵢₘₚ D1 (Uₚ): ≤ 50 V
  • Voltage Protection Level Line-PG at 1 kV/µs C3 (Uₚ): ≤ 1,100 V
  • Voltage Protection Level Line-PG for Iₙ C2 (Uₚ): ≤ 1,400 V
  • Voltage Protection Level Line-PG for Iᵢₘₚ D1 (Uₚ): ≤ 1,300 V

Documentation

Data Sheets

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