DPI MD

Energy-coordinated two-stage arrester, no leakage currents to earth, for 4-20 mA interfaces with thread M20 x 1.5 (female/male). Direct, indirect or no shield earthing. Cable gland available as accessory part.

Part No. 929941

DPI MD 24 M 2S

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DPI MD EX

Energy-coordinated two-stage surge arrester with low-capacitance protective circuit for protecting intrinsically safe measuring circuits and bus systems, meets FISCO requirements. Insulation strength > 500 V to earth. Cable glands must be ordered separately.

Part No. 929960

DPI MD EX 24 M 2

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Technical data
SPD class	T
Max. continuous operating voltage DC (U_C)	34,8 V
Max. continuous operating a.c. voltage (U_C)	24,5 V
Nominal current (I_N)	0,5 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)	7 MHz
For mounting on (field / device side)	M20 x 1,5 Innengewinde / M20 x 1,5 Außengewinde
Approvals	ATEX, IECEx, CCC, CSA & USA Hazloc, SIL

DPI MD EX

Energy-coordinated two-stage surge arrester with low-capacitance protective circuit for protecting intrinsically safe measuring circuits and bus systems, meets FISCO requirements. Insulation strength > 500 V to earth. Cable glands must be ordered separately.

Part No. 929965

DPI MD EX 24 N 2

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Technical data
SPD class	T
Max. continuous operating voltage DC (U_C)	34,8 V
Max. continuous operating a.c. voltage (U_C)	24,5 V
Nominal current (I_N)	0,5 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)	7 MHz
For mounting on (field / device side)	¹/₂-14 NPT Innengewinde / ¹/₂-14 NPT Außengewinde
Approvals	ATEX, IECEx, CCC, SIL

DPI CD EXI

Surge arrester with a low-capacitance protective circuit for protecting intrinsically safe measuring circuits and bus systems, meets FISCO requirements. Insulation strength > 500 V to earth.

Part No. 929961

DPI CD EXI 24 M

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Technical data
SPD class	T
Max. continuous operating voltage DC (U_C)	32 V
Max. continuous operating a.c. voltage (U_C)	22,6 V
Nominal current (I_N)	0,55 A
D1 Lightning impulse current (10/350 µs) line-PG (I_imp)	1 kA
C2 Total nominal discharge current (8/20 µs) (I_n)	10 kA
Cut-off frequency line-line (f_G)	67 MHz
For mounting on (field / device side)	M20 x 1,5 Außengewinde
Approvals	ATEX, IECEx, CCC, CSA & USA Hazloc, SIL

DPI CD EXI

Surge arrester with a low-capacitance protective circuit for protecting intrinsically safe measuring circuits and bus systems, meets FISCO requirements. Insulation strength > 500 V to earth.

Part No. 929963

DPI CD EXI 24 N

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Technical data
SPD class	T
Max. continuous operating voltage DC (U_C)	32 V
Max. continuous operating a.c. voltage (U_C)	22,6 V
Nominal current (I_N)	0,55 A
D1 Lightning impulse current (10/350 µs) line-PG (I_imp)	1 kA
C2 Total nominal discharge current (8/20 µs) (I_n)	10 kA
Cut-off frequency line-line (f_G)	67 MHz
For mounting on (field / device side)	¹/₂-14 NPT Außengewinde
Approvals	ATEX, IECEx, CCC, CSA & USA Hazloc, SIL

DPI CD EXD

Flameproof surge arrester with a low-capacitance protective circuit for protecting measuring circuits and bus systems in potentially explosive atmospheres. Insulation strength > 500 V to earth. Certified to CSA and USA Hazloc standards.

Part No. 929962

DPI CD EXD 24 M

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Technical data
SPD class	T
Max. continuous operating voltage DC (U_C)	32 V
Max. continuous operating a.c. voltage (U_C)	22,6 V
Nominal current (I_N)	0,55 A
D1 Lightning impulse current (10/350 µs) line-PG (I_imp)	1 kA
C2 Total nominal discharge current (8/20 µs) (I_n)	10 kA
Cut-off frequency line-line (f_G)	67 MHz
For mounting on (field / device side)	M20 x 1,5 Außengewinde
Approvals	ATEX, IECEx, CCC, CSA & USA Hazloc, SIL

DPI CD EXD

Flameproof surge arrester with a low-capacitance protective circuit for protecting measuring circuits and bus systems in potentially explosive atmospheres. Insulation strength > 500 V to earth. Certified to CSA and USA Hazloc standards.

Part No. 929964

DPI CD EXD 24 N

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Technical data
SPD class	T
Max. continuous operating voltage DC (U_C)	32 V
Max. continuous operating a.c. voltage (U_C)	22,6 V
Nominal current (I_N)	0,55 A
D1 Lightning impulse current (10/350 µs) line-PG (I_imp)	1 kA
C2 Total nominal discharge current (8/20 µs) (I_n)	10 kA
Cut-off frequency line-line (f_G)	67 MHz
For mounting on (field / device side)	¹/₂-14 NPT Außengewinde
Approvals	ATEX, IECEx, CCC, CSA & USA Hazloc, SIL
Protection for the data side
For mounting on (field / device side)

DPI CD HF EXD

Flameproof surge arrester in an energy-coordinated low-capacitance protective circuit for use in potentially explosive atmospheres for protecting measuring circuits and bus systems.

Part No. 929971

DPI CD HF EXD 5 M

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DPI CD EXD 230 24

Flameproof surge arrester for the data and power side for protecting one 120 / 230 V power supply system and one 24 V data interface of field devices in potentially explosive areas (zones 1 and 2).
Additional safety due to fault-proof Y circuit for 120 / 230 V power supply systems.

II 2 G Ex d IIC T5/T6 version universally applicable in hazardous zones 1 and 2. Certified to CSA and USA Hazloc standards.

Part No. 929969

DPI CD EXD 230 24 M

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Technical data
Protection for the data side
SPD class	U
Max. continuous operating voltage DC (U_C)	32 V
Max. continuous operating a.c. voltage (U_C)	22,6 V
Nominal current at 80°C (I_L)	0,55 A
D1 Lightning impulse current (10/350 µs) line-PG (I_imp)	1 kA
C2 Total nominal discharge current (8/20 µs) (I_n)	10 kA
For mounting on (field / device side)	M20 x 1,5 Außengewinde
Approvals	ATEX, IECEx, CCC, CSA & USA Hazloc, SIL
Protection for the power side
SPD according to EN 61643-11 / IEC 61643-11	type 2 / class II
Max. continuous operating a.c. voltage (U_C)	255 V
Total discharge current (8/20 µs) L+N-PE (I_total)	5 kA
Voltage protection level L-N (U_P)	≤ 1.4 kV
Additional overcurrent protection	16 A gG or B 16 A

DPI CD EXD 230 24

Flameproof surge arrester for the data and power side for protecting one 120 / 230 V power supply system and one 24 V data interface of field devices in potentially explosive areas (zones 1 and 2).
Additional safety due to fault-proof Y circuit for 120 / 230 V power supply systems.

II 2 G Ex d IIC T5/T6 version universally applicable in hazardous zones 1 and 2. Certified to CSA and USA Hazloc standards.

Part No. 929970

DPI CD EXD 230 24 N

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Technical data
Protection for the data side
SPD class	U
Max. continuous operating voltage DC (U_C)	32 V
Max. continuous operating a.c. voltage (U_C)	22.6 V
Nominal current at 80°C (I_L)	0.55 A
D1 Lightning impulse current (10/350 µs) line-PG (I_imp)	1 kA
C2 Total nominal discharge current (8/20 µs) (I_n)	10 kA
For mounting on (field / device side)	¹/₂-14 npt male thread
Approvals	ATEX, IECEx, CCC, CSA & USA Hazloc, SIL
Protection for the power side
SPD according to EN 61643-11 / IEC 61643-11	type 2 / class II
Max. continuous operating a.c. voltage (U_C)	255 V
Total discharge current (8/20 µs) L+N-PE (I_total)	5 kA
Voltage protection level L-N (U_P)	≤ 1.4 kV
Additional overcurrent protection	16 A gG or B 16 A

DPI CD EXI+D 2X24

Flameproof surge arrester for use in potentially explosive atmospheres for protecting two 24 V interfaces

Part No. 929950

DPI CD EXI+D 2X24 M

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DPI CD EXI+D 2X24

Flameproof surge arrester for use in potentially explosive atmospheres for protecting two 24 V interfaces

Part No. 929951

DPI CD EXI+D 2X24 N

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DPI CD EXI+D EAS 15 M

Available from Q3 2026

Surge arrester in an intrinsically safe flameproof enclosure for use in potentially explosive atmospheres for protecting field devices with Ethernet network termination interface, PROFIBUS PA and measuring and control circuits. Fulfils the requirements of 2-WISE and FISCO Insulation strength >500 V line-earth.

Part No. 929974

DPI CD EXI+D EAS 15 M

New

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Technical data
SPD class	T
Max. continuous operating voltage DC (U_C)	32 V
Max. continuous operating a.c. voltage (U_C)	22.6 V
Nominal current (I_N)	0.55 A
D1 Lightning impulse current (10/350 µs) line-PG (I_imp)	1 kA
C2 Total nominal discharge current (8/20 µs) (I_n)	10 kA
Cut-off frequency line-line (f_G)	67 MHz
For mounting on (field / device side)	M20 x 1.5 male thread
Approvals	ATEX, IECEx, CCC, CSA & USA Hazloc, SIL

DPI CD EXI+D EAS 15 N

Available from Q3 2026

Surge arrester in an intrinsically safe flameproof enclosure for use in potentially explosive atmospheres for protecting field devices with Ethernet network termination interface, PROFIBUS PA and measuring and control circuits. Fulfils the requirements of 2-WISE and FISCO Insulation strength >500 V line-earth.

Part No. 929975

DPI CD EXI+D EAS 15 N

New

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Technical data
SPD class	T
Max. continuous operating voltage DC (U_C)	32 V
Max. continuous operating a.c. voltage (U_C)	22.6 V
Nominal current (I_N)	0.55 A
D1 Lightning impulse current (10/350 µs) line-PG (I_imp)	1 kA
C2 Total nominal discharge current (8/20 µs) (I_n)	10 kA
Cut-off frequency line-line (f_G)	67 MHz
For mounting on (field / device side)	¹/₂-14 NPT male thread
Approvals	ATEX, IECEx, CCC, CSA & USA Hazloc, SIL

DEHNpipe

DPI MD

DPI MD EX

DPI MD EX

DPI CD EXI

DPI CD EXI

DPI CD EXD

DPI CD EXD

DPI CD HF EXD

DPI CD EXD 230 24

DPI CD EXD 230 24

DPI CD EXI+D 2X24

DPI CD EXI+D 2X24

DPI CD EXI+D EAS 15 M

DPI CD EXI+D EAS 15 N