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Pluggable and universal multipole surge arrester for use in intrinsically safe systems with integrated LifeCheck monitoring function.
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Two-part design comprising a universal base part and an application-specific protection module.
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All protection elements are integrated in the plug-in module and are monitored by means of LifeCheck.
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The module locking mechanism ensures that the module is vibration-proof and protected against polarity reversal.
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Prewired surge arrester unit ITAK EXI BXT 24.

BLITZDUCTOR XT Ex (i) – Protection Modules

Surge arrester for intrinsically safe measuring circuits and bus systems

Maximum discharge capacity for two-pole, three-pole or four-pole interfaces
Low voltage protection level, capable of protecting terminal equipment
Wide range of approvals: ATEX, IECEx, CSA Hazloc

Arrester consists of a protection module and a base part

Easy replacement of protection modules without force
All protection components are integrated in the protection module
Arrester with integrated RFID LifeCheck for preventive arrester monitoring

Functional and attractive design

DIN rail mounted arrester with integrated earthing
Minimum space requirements, two pairs over a width of 12 mm
Vibration and shock-tested for safe operation

BXT ML4 BD EX 24

Space-saving LifeCheck-equipped surge arrester module for protecting two pairs in 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 contactlessly by DEHNrecord LC / SCM / MCM.

Art.-Nr. 920381

BXT ML4 BD EX 24

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BXT ML2 BD S EX 24

Space-saving LifeCheck-equipped surge arrester module for protecting one pair in intrinsically safe measuring circuits and bus systems, direct or indirect shield earthing. Insulation strength > 500 V line-earth.
If LifeCheck detects thermal or electrical overload, the arrester has to be replaced. This status is indicated contactlessly by DEHNrecord LC / SCM / MCM.

Art.-Nr. 920280

BXT ML2 BD S EX 24

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BXT ML4 BC EX 24

Space-saving LifeCheck-equipped surge arrester module for protecting up to four unearthed single lines sharing a common reference potential in intrinsically safe measuring circuits, 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 contactlessly by DEHNrecord LC / SCM / MCM.

Art.-Nr. 920384

BXT ML4 BC EX 24

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BXT ML2 BD HF EX 6

Space-saving LifeCheck-equipped surge arrester module for protecting one pair in intrinsically safe measuring circuits and RS485 bus systems. Insulation strength > 500 V line-earth.
If LifeCheck detects thermal and electrical overload, the arrester has to be replaced. This status is indicated contactlessly by DEHNrecord LC / SCM / MCM.

Art.-Nr. 920538

BXT ML2 BD HF EX 6

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SPD class	T
Max. continuous operating voltage (d.c.) (U_c)	33 V
Max. input current according to EN 60079-11 (I_i)	0.5 A
D1 Total lightning impulse current (10/350 µs) (I_imp)	4 kA
D1 Lightning impulse current (10/350 µs) per line (I_imp)	1 kA
C2 Total nominal discharge current (8/20 µs) (I_n)	20 kA
Cut-off frequency line-line (f_G)	7.7 MHz
Approvals ^*)	CSA, ATEX, IECEx, CCC, CSA & USA Hazloc, SIL, Inmetro, UKCA

SPD class	T
Max. continuous operating voltage (d.c.) (U_c)	33 V
Max. input current according to EN 60079-11 (I_i)	0.5 A
D1 Total lightning impulse current (10/350 µs) (I_imp)	4 kA
D1 Lightning impulse current (10/350 µs) per line (I_imp)	1 kA
C2 Total nominal discharge current (8/20 µs) (I_n)	10 kA
Cut-off frequency line-line (f_G)	6 MHz
Approvals ^*)	ATEX, IECEx, CCC, CSA & USA Hazloc, SIL, Inmetro, UKCA

SPD class	T
Max. continuous operating voltage (d.c.) (U_c)	33 V
Max. input current according to EN 60079-11 (I_i)	0.5 A
D1 Total lightning impulse current (10/350 µs) (I_imp)	4 kA
D1 Lightning impulse current (10/350 µs) per line (I_imp)	1 kA
C2 Total nominal discharge current (8/20 µs) (I_n)	20 kA
Cut-off frequency line-line (f_G)	6.4 MHz
Approvals ^*)	CSA, ATEX, IECEx, CCC, CSA & USA Hazloc, SIL, Inmetro, UKCA

SPD class	T
Max. continuous operating voltage (d.c.) (U_c)	6 V
Max. input current according to EN 60079-11 (I_i)	4.8 A
D1 Lightning impulse current (10/350 µs) per line (I_imp)	1 kA
C2 Total nominal discharge current (8/20 µs) (I_n)	10 kA
Cut-off frequency line-line (f_G)	100 MHz
Approvals ^*)	ATEX, IECEx, CCC, CSA & USA Hazloc, SIL, Inmetro, UKCA