Siemens SENTRON 5SD74 combination arresters, integrated back-up fuse

SENTRON 5SD74 combination surge arresters with integrated back-up fuse for TN-S and TT systems, with matching N-PE module and connection bars.

Key features

Integrated back-up fuse saves a separate fuse
L-N module 230 V AC and N-PE module, each 2 MW
Modular configuration for 1-phase and 3-phase systems
Connection bars for 3-pole and 4-pole configurations

Specifications

Brand	Siemens SENTRON
Series	5SD74
SPD type	Type 1 + type 2
System	TN-S and TT
Mounting	DIN rail
Source	Siemens Catalog LV 10 · 2026, p. 512-513

5SD7441-1KF00		System: TN-S and TT \| Protection paths: L-N \| Un / Uc: 230 V AC / 255 V AC \| Circuit: 1 + 0 \| Mounting width: 2 MW
5SD7401-1		System: TN-S and TT \| Protection paths: N-PE \| Un / Uc: - \| Circuit: N-PE \| Mounting width: 2 MW
5SD7490-6		System: Connection bar \| Protection paths: - \| Un / Uc: - \| Circuit: 1-phase, 3-pole \| Mounting width: -
5SD7490-7		System: Connection bar \| Protection paths: - \| Un / Uc: - \| Circuit: 1-phase, 4-pole \| Mounting width: -

Surge Protection DevicesSiemens

4 product codes available in this family

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Siemens SENTRON 5SD74 combination arresters, integrated back-up fuse

Brand Siemens·Surge Protection Devices

Available part numbers (4)

5SD7441-1KF00, 5SD7401-1, 5SD7490-6, 5SD7490-7

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Product codes & specifications

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RFQ List (0)

	Product code	Spec
	5SD7441-1KF00	System: TN-S and TT \| Protection paths: L-N \| Un / Uc: 230 V AC / 255 V AC \| Circuit: 1 + 0 \| Mounting width: 2 MW
	5SD7401-1	System: TN-S and TT \| Protection paths: N-PE \| Un / Uc: - \| Circuit: N-PE \| Mounting width: 2 MW
	5SD7490-6	System: Connection bar \| Protection paths: - \| Un / Uc: - \| Circuit: 1-phase, 3-pole \| Mounting width: -
	5SD7490-7	System: Connection bar \| Protection paths: - \| Un / Uc: - \| Circuit: 1-phase, 4-pole \| Mounting width: -

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Siemens SENTRON 5SD74 combination arresters, integrated back-up fuse