The compact unit Dehn BXT ML4 BE 36 for combined lightning protection is type T1 and is intended to protect four independent lines with a common reference potential.

The technical specifications of the unit are as follows:

• Type: BXT ML4 BE 36
• SPD Class: Type 1
• Maximum operating voltage: DC 45 V, AC 31 V
• Nominal current at 45 °C: 1.8 A
• Impulse discharge current: total 10 kA and 2.5 kA per line (10/350 µs)
• Nominal discharge current: total 20 kA and 10 kA per line (8/20 µs)
• Protection level line-to-line: ≤ 140 V (Iimp D1), ≤ 112 V (C3)
• Protection level line-to-PG: ≤ 85 V (Iimp D1), ≤ 56 V (C3)
• Series resistance per line: 0.43 Ω
• Cut-off frequency line-to-PG: 3.8 MHz
• Capacitance: ≤ 0.8 nF line-to-line, ≤ 1.6 nF line-to-PG
• Operating temperature: -40 °C ... +80 °C
• Protection: IP 20
• Enclosure: polyamide PA 6.6
• Color: yellow
• Standards: IEC 61643-21 / EN 61643-21
• Approvals: UL, EAC, ATEX, IECEx, CSA & USA Hazloc, SIL
• SIL Rating: up to SIL3
• Certificates: ATEX DEKRA 11ATEX0089 X II 3 G Ex nA IIC T4 Gc, IECEx DEK 11.0032X Ex nA IIC T4 Gc, CSA & USA Hazloc 2516389 Class I Div. 2 GP A, B, C, D T4, CSA & USA Hazloc 2516389 Class I Zone 2, AEx nA IIC T4, CCC No. 2021312304001155

The LifeCheck function allows non-contact monitoring of the unit’s status and signals thermal or electrical overload.