• Siemens SENTRON 5SD74 combination surge arresters type 1 + type 2
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Siemens SENTRON 5SD74 combination surge arresters type 1 + type 2

Siemens SENTRON 5SD74 combination surge arresters type 1 + type 2

SENTRON 5SD74 combination surge arresters type 1 + type 2 with remote signaling, combining lightning and surge protection in one device.

Key features

  • Combined type 1 and type 2 protection in one device
  • Versions for TN-C and TN-S/TT systems
  • Circuits 1+1, 3+0 and 3+1
  • Remote signaling contact
  • Replaceable spare part plugs for type 1 and type 2 paths

Specifications

Brand Siemens SENTRON
Series 5SD74
SPD type Type 1 + type 2
Standards IEC/EN 61643-11
Mounting DIN rail
Source Siemens Catalog LV 10 · 2026, p. 510-511
5SD7442-1 System: TN-S and TT | Protection paths: L-N, L-PE and N-PE | Un / Uc: 240 V AC / 350 V AC | Circuit: 1 + 1 | Remote signaling: Yes | Mounting width: 4 MW
5SD7443-1 System: TN-C | Protection paths: L-PEN | Un / Uc: 240/415 V AC / 350 V AC | Circuit: 3 + 0 | Remote signaling: Yes | Mounting width: 6 MW
5SD7444-1 System: TN-S and TT | Protection paths: L-N, L-PE and N-PE | Un / Uc: 240 V AC / 350 V AC | Circuit: 3 + 1 | Remote signaling: Yes | Mounting width: 8 MW
5SD7448-1 System: Spare part plug | Protection paths: L-N and L-PEN (type 1) | Un / Uc: - | Circuit: For 5SD7442-1, 5SD7443-1, 5SD7444-1 | Remote signaling: - | Mounting width: -
5SD7428-1 System: Spare part plug | Protection paths: L-N and L-PEN (type 2) | Un / Uc: - | Circuit: For 5SD7442/43/44-1, 5SD7422/24 | Remote signaling: - | Mounting width: -
Surge Protection DevicesSiemens
5 product codes available in this family
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Siemens SENTRON 5SD74 combination surge arresters type 1 + type 2

Brand Siemens·Surge Protection Devices

Available part numbers (5)

5SD7442-1, 5SD7443-1, 5SD7444-1, 5SD7448-1, 5SD7428-1

How to order

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Product codes & specifications
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Product codeSpec
5SD7442-1System: TN-S and TT | Protection paths: L-N, L-PE and N-PE | Un / Uc: 240 V AC / 350 V AC | Circuit: 1 + 1 | Remote signaling: Yes | Mounting width: 4 MW
5SD7443-1System: TN-C | Protection paths: L-PEN | Un / Uc: 240/415 V AC / 350 V AC | Circuit: 3 + 0 | Remote signaling: Yes | Mounting width: 6 MW
5SD7444-1System: TN-S and TT | Protection paths: L-N, L-PE and N-PE | Un / Uc: 240 V AC / 350 V AC | Circuit: 3 + 1 | Remote signaling: Yes | Mounting width: 8 MW
5SD7448-1System: Spare part plug | Protection paths: L-N and L-PEN (type 1) | Un / Uc: - | Circuit: For 5SD7442-1, 5SD7443-1, 5SD7444-1 | Remote signaling: - | Mounting width: -
5SD7428-1System: Spare part plug | Protection paths: L-N and L-PEN (type 2) | Un / Uc: - | Circuit: For 5SD7442/43/44-1, 5SD7422/24 | Remote signaling: - | Mounting width: -

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