• LS Electric SD Series SPD External Disconnector (SD10-SD40, SD13)
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LS Electric SD Series SPD External Disconnector (SD10-SD40, SD13)

LS Electric SD Series SPD External Disconnector (SD10-SD40, SD13)

LS Electric SD series dedicated external disconnectors that isolate a surge protective device from the network on SPD failure or during maintenance.

Key features

  • Trips on leakage current caused by SPD degradation (varistor damage)
  • High surge withstand prevents nuisance tripping during surge discharge
  • Matched to BK and SP series SPDs: SD10/20/30/40-T2 (Class II) and SD13-T1 (Class I)
  • 1, 2, 3 and 4-pole versions on 35 mm DIN rail
  • Alarm contact (AL) available for SD20-T2 and SD40-T2

Specifications

Rated voltage Ue 230/400 V
Rated insulation voltage Ui 500 V
Short-circuit current Isc 25 kA
Frequency 50/60 Hz
Min. delayed trip current It 3 A (<10 s)
Min. instantaneous trip current Ii 5 A (>0.1 s), 10 A (<0.1 s)
Degree of protection IP20
Max. conductor 25 mm2
Operating temperature -25 to 60 C
Mounting DIN rail EN 60715 (35 mm)
Source LS Electric Surge Protective Device catalog C01551-07 (2025-10), p. 56-57
SD10-T2/1P Class: Class II, III | Poles: 1P | Withstand current: In 10 kA / Imax 20 kA | Voltage protection Up: 0.25 kV
SD10-T2/2P Class: Class II, III | Poles: 2P | Withstand current: In 10 kA / Imax 20 kA | Voltage protection Up: 0.25 kV
SD10-T2/3P Class: Class II, III | Poles: 3P | Withstand current: In 10 kA / Imax 20 kA | Voltage protection Up: 0.25 kV
SD10-T2/4P Class: Class II, III | Poles: 4P | Withstand current: In 10 kA / Imax 20 kA | Voltage protection Up: 0.25 kV
SD20-T2/1P Class: Class II | Poles: 1P | Withstand current: In 20 kA / Imax 40 kA | Voltage protection Up: 0.4 kV
SD20-T2/2P Class: Class II | Poles: 2P | Withstand current: In 20 kA / Imax 40 kA | Voltage protection Up: 0.4 kV
SD20-T2/3P Class: Class II | Poles: 3P | Withstand current: In 20 kA / Imax 40 kA | Voltage protection Up: 0.4 kV
SD20-T2/4P Class: Class II | Poles: 4P | Withstand current: In 20 kA / Imax 40 kA | Voltage protection Up: 0.4 kV
SD30-T2/1P Class: Class II | Poles: 1P | Withstand current: In 30 kA / Imax 60 kA | Voltage protection Up: 0.5 kV
SD30-T2/2P Class: Class II | Poles: 2P | Withstand current: In 30 kA / Imax 60 kA | Voltage protection Up: 0.5 kV
SD30-T2/3P Class: Class II | Poles: 3P | Withstand current: In 30 kA / Imax 60 kA | Voltage protection Up: 0.5 kV
SD30-T2/4P Class: Class II | Poles: 4P | Withstand current: In 30 kA / Imax 60 kA | Voltage protection Up: 0.5 kV
SD40-T2/1P Class: Class II | Poles: 1P | Withstand current: In 40 kA / Imax 80 kA | Voltage protection Up: 0.7 kV
SD40-T2/2P Class: Class II | Poles: 2P | Withstand current: In 40 kA / Imax 80 kA | Voltage protection Up: 0.7 kV
SD40-T2/3P Class: Class II | Poles: 3P | Withstand current: In 40 kA / Imax 80 kA | Voltage protection Up: 0.7 kV
SD40-T2/4P Class: Class II | Poles: 4P | Withstand current: In 40 kA / Imax 80 kA | Voltage protection Up: 0.7 kV
SD13-T1/1P Class: Class I | Poles: 1P | Withstand current: Iimp 12.5 kA | Voltage protection Up: 0.3 kV
SD13-T1/2P Class: Class I | Poles: 2P | Withstand current: Iimp 12.5 kA | Voltage protection Up: 0.3 kV
SD13-T1/3P Class: Class I | Poles: 3P | Withstand current: Iimp 12.5 kA | Voltage protection Up: 0.3 kV
SD13-T1/4P Class: Class I | Poles: 4P | Withstand current: Iimp 12.5 kA | Voltage protection Up: 0.3 kV
AccessoriesLS Electric
20 product codes available in this family
Sourced direct from KoreaExport-ready supplyCompetitive pricing
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LS Electric SD Series SPD External Disconnector (SD10-SD40, SD13)

Brand LS Electric·Accessories

Available part numbers (20)

SD10-T2/1P, SD10-T2/2P, SD10-T2/3P, SD10-T2/4P, SD20-T2/1P, SD20-T2/2P, SD20-T2/3P, SD20-T2/4P, SD30-T2/1P, SD30-T2/2P + 10 more — see full table ↓

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Product codes & specifications
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Product codeSpec
SD10-T2/1PClass: Class II, III | Poles: 1P | Withstand current: In 10 kA / Imax 20 kA | Voltage protection Up: 0.25 kV
SD10-T2/2PClass: Class II, III | Poles: 2P | Withstand current: In 10 kA / Imax 20 kA | Voltage protection Up: 0.25 kV
SD10-T2/3PClass: Class II, III | Poles: 3P | Withstand current: In 10 kA / Imax 20 kA | Voltage protection Up: 0.25 kV
SD10-T2/4PClass: Class II, III | Poles: 4P | Withstand current: In 10 kA / Imax 20 kA | Voltage protection Up: 0.25 kV
SD20-T2/1PClass: Class II | Poles: 1P | Withstand current: In 20 kA / Imax 40 kA | Voltage protection Up: 0.4 kV
SD20-T2/2PClass: Class II | Poles: 2P | Withstand current: In 20 kA / Imax 40 kA | Voltage protection Up: 0.4 kV
SD20-T2/3PClass: Class II | Poles: 3P | Withstand current: In 20 kA / Imax 40 kA | Voltage protection Up: 0.4 kV
SD20-T2/4PClass: Class II | Poles: 4P | Withstand current: In 20 kA / Imax 40 kA | Voltage protection Up: 0.4 kV
SD30-T2/1PClass: Class II | Poles: 1P | Withstand current: In 30 kA / Imax 60 kA | Voltage protection Up: 0.5 kV
SD30-T2/2PClass: Class II | Poles: 2P | Withstand current: In 30 kA / Imax 60 kA | Voltage protection Up: 0.5 kV
SD30-T2/3PClass: Class II | Poles: 3P | Withstand current: In 30 kA / Imax 60 kA | Voltage protection Up: 0.5 kV
SD30-T2/4PClass: Class II | Poles: 4P | Withstand current: In 30 kA / Imax 60 kA | Voltage protection Up: 0.5 kV
SD40-T2/1PClass: Class II | Poles: 1P | Withstand current: In 40 kA / Imax 80 kA | Voltage protection Up: 0.7 kV
SD40-T2/2PClass: Class II | Poles: 2P | Withstand current: In 40 kA / Imax 80 kA | Voltage protection Up: 0.7 kV
SD40-T2/3PClass: Class II | Poles: 3P | Withstand current: In 40 kA / Imax 80 kA | Voltage protection Up: 0.7 kV
SD40-T2/4PClass: Class II | Poles: 4P | Withstand current: In 40 kA / Imax 80 kA | Voltage protection Up: 0.7 kV
SD13-T1/1PClass: Class I | Poles: 1P | Withstand current: Iimp 12.5 kA | Voltage protection Up: 0.3 kV
SD13-T1/2PClass: Class I | Poles: 2P | Withstand current: Iimp 12.5 kA | Voltage protection Up: 0.3 kV
SD13-T1/3PClass: Class I | Poles: 3P | Withstand current: Iimp 12.5 kA | Voltage protection Up: 0.3 kV
SD13-T1/4PClass: Class I | Poles: 4P | Withstand current: Iimp 12.5 kA | Voltage protection Up: 0.3 kV

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