• LS Electric LSTSP Single-Phase Voltage Sag Protector (0.5-10 kVA)
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LS Electric LSTSP Single-Phase Voltage Sag Protector (0.5-10 kVA)

LS Electric LSTSP Single-Phase Voltage Sag Protector (0.5-10 kVA)

LS Electric LSTSP single-phase battery-free voltage sag protectors that compensate sags and interruptions up to 1 s within 2 ms using ultra-capacitors.

Key features

  • Compensates voltage sags and 100% interruptions for 1 s at full load
  • Transfer time under 2 ms (0.8 ms detection, 1.2 ms inverter reaction), pure sine output
  • Ultra-capacitor storage: no battery, no cooling fan, 15-year life
  • Stand, wall-mount or tower housing; 0.5 to 10 kVA
  • HMI with sag event logging; RS-485 (Ethernet option) and Sag-VIEWER software for 2 kVA and up
  • Internal SCR bypass; optional ETS emergency transfer switch

Specifications

Input 1-phase 110/208/220/240 V +-10%, 50/60 Hz auto detect
Compensation time 1 s at full load
Transfer time < 2 ms
Compensation threshold 10-90% of rated voltage (default 85%)
Output THD < 3% (linear full load)
Cooling Natural air (no fan)
Operating temperature 0 to 40 C, 15-85% RH
Standard IEC 62040-1
Certification CE (TUV), S-Mark, KC
Source LS Electric Voltage Sag Protector catalog C16051-02 (2026-04), p. 7-11
LSTSP-11005W Capacity: 0.5 kVA | Rated voltage: 1-phase AC 110 V | Type: Wall mount | Weight: 10 kg
LSTSP-12005W Capacity: 0.5 kVA | Rated voltage: 1-phase AC 220 V | Type: Wall mount | Weight: 10 kg
LSTSP-14005W Capacity: 0.5 kVA | Rated voltage: 1-phase AC 240 V | Type: Wall mount | Weight: 10 kg
LSTSP-18005W Capacity: 0.5 kVA | Rated voltage: 1-phase AC 208 V | Type: Wall mount | Weight: 10 kg
LSTSP-11010S Capacity: 1 kVA | Rated voltage: 1-phase AC 110 V | Type: Stand | Weight: 18 kg
LSTSP-11010W Capacity: 1 kVA | Rated voltage: 1-phase AC 110 V | Type: Wall mount | Weight: 18 kg
LSTSP-12010S Capacity: 1 kVA | Rated voltage: 1-phase AC 220 V | Type: Stand | Weight: 18 kg
LSTSP-12010W Capacity: 1 kVA | Rated voltage: 1-phase AC 220 V | Type: Wall mount | Weight: 18 kg
LSTSP-14010S Capacity: 1 kVA | Rated voltage: 1-phase AC 240 V | Type: Stand | Weight: 18 kg
LSTSP-14010W Capacity: 1 kVA | Rated voltage: 1-phase AC 240 V | Type: Wall mount | Weight: 18 kg
LSTSP-18010S Capacity: 1 kVA | Rated voltage: 1-phase AC 208 V | Type: Stand | Weight: 18 kg
LSTSP-18010W Capacity: 1 kVA | Rated voltage: 1-phase AC 208 V | Type: Wall mount | Weight: 18 kg
LSTSP-11020S Capacity: 2 kVA | Rated voltage: 1-phase AC 110 V | Type: Stand | Weight: 27 kg
LSTSP-11020W Capacity: 2 kVA | Rated voltage: 1-phase AC 110 V | Type: Wall mount | Weight: 27 kg
LSTSP-12020S Capacity: 2 kVA | Rated voltage: 1-phase AC 220 V | Type: Stand | Weight: 27 kg
LSTSP-12020W Capacity: 2 kVA | Rated voltage: 1-phase AC 220 V | Type: Wall mount | Weight: 27 kg
LSTSP-14020S Capacity: 2 kVA | Rated voltage: 1-phase AC 240 V | Type: Stand | Weight: 27 kg
LSTSP-14020W Capacity: 2 kVA | Rated voltage: 1-phase AC 240 V | Type: Wall mount | Weight: 27 kg
LSTSP-18020S Capacity: 2 kVA | Rated voltage: 1-phase AC 208 V | Type: Stand | Weight: 27 kg
LSTSP-18020W Capacity: 2 kVA | Rated voltage: 1-phase AC 208 V | Type: Wall mount | Weight: 27 kg
LSTSP-11030S Capacity: 3 kVA | Rated voltage: 1-phase AC 110 V | Type: Stand | Weight: 31 kg
LSTSP-11030W Capacity: 3 kVA | Rated voltage: 1-phase AC 110 V | Type: Wall mount | Weight: 31 kg
LSTSP-12030S Capacity: 3 kVA | Rated voltage: 1-phase AC 220 V | Type: Stand | Weight: 31 kg
LSTSP-12030W Capacity: 3 kVA | Rated voltage: 1-phase AC 220 V | Type: Wall mount | Weight: 31 kg
LSTSP-14030S Capacity: 3 kVA | Rated voltage: 1-phase AC 240 V | Type: Stand | Weight: 31 kg
LSTSP-14030W Capacity: 3 kVA | Rated voltage: 1-phase AC 240 V | Type: Wall mount | Weight: 31 kg
LSTSP-18030S Capacity: 3 kVA | Rated voltage: 1-phase AC 208 V | Type: Stand | Weight: 31 kg
LSTSP-18030W Capacity: 3 kVA | Rated voltage: 1-phase AC 208 V | Type: Wall mount | Weight: 31 kg
LSTSP-11050S Capacity: 5 kVA | Rated voltage: 1-phase AC 110 V | Type: Stand | Weight: 44 kg (T: 46 kg)
LSTSP-11050T Capacity: 5 kVA | Rated voltage: 1-phase AC 110 V | Type: Tower | Weight: 44 kg (T: 46 kg)
LSTSP-12050S Capacity: 5 kVA | Rated voltage: 1-phase AC 220 V | Type: Stand | Weight: 44 kg (T: 46 kg)
LSTSP-12050T Capacity: 5 kVA | Rated voltage: 1-phase AC 220 V | Type: Tower | Weight: 44 kg (T: 46 kg)
LSTSP-14050S Capacity: 5 kVA | Rated voltage: 1-phase AC 240 V | Type: Stand | Weight: 44 kg (T: 46 kg)
LSTSP-14050T Capacity: 5 kVA | Rated voltage: 1-phase AC 240 V | Type: Tower | Weight: 44 kg (T: 46 kg)
LSTSP-18050S Capacity: 5 kVA | Rated voltage: 1-phase AC 208 V | Type: Stand | Weight: 44 kg (T: 46 kg)
LSTSP-18050T Capacity: 5 kVA | Rated voltage: 1-phase AC 208 V | Type: Tower | Weight: 44 kg (T: 46 kg)
LSTSP-11100S Capacity: 10 kVA | Rated voltage: 1-phase AC 110 V | Type: Stand | Weight: 48 kg (T: 55 kg)
LSTSP-11100T Capacity: 10 kVA | Rated voltage: 1-phase AC 110 V | Type: Tower | Weight: 48 kg (T: 55 kg)
LSTSP-12100S Capacity: 10 kVA | Rated voltage: 1-phase AC 220 V | Type: Stand | Weight: 48 kg (T: 55 kg)
LSTSP-12100T Capacity: 10 kVA | Rated voltage: 1-phase AC 220 V | Type: Tower | Weight: 48 kg (T: 55 kg)
LSTSP-14100S Capacity: 10 kVA | Rated voltage: 1-phase AC 240 V | Type: Stand | Weight: 48 kg (T: 55 kg)
LSTSP-14100T Capacity: 10 kVA | Rated voltage: 1-phase AC 240 V | Type: Tower | Weight: 48 kg (T: 55 kg)
LSTSP-18100S Capacity: 10 kVA | Rated voltage: 1-phase AC 208 V | Type: Stand | Weight: 48 kg (T: 55 kg)
LSTSP-18100T Capacity: 10 kVA | Rated voltage: 1-phase AC 208 V | Type: Tower | Weight: 48 kg (T: 55 kg)
Voltage Sag ProtectorsLS Electric
44 product codes available in this family
Sourced direct from KoreaExport-ready supplyCompetitive pricing
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LS Electric LSTSP Single-Phase Voltage Sag Protector (0.5-10 kVA)

Brand LS Electric·Voltage Sag Protectors

Available part numbers (44)

LSTSP-11005W, LSTSP-12005W, LSTSP-14005W, LSTSP-18005W, LSTSP-11010S, LSTSP-11010W, LSTSP-12010S, LSTSP-12010W, LSTSP-14010S, LSTSP-14010W + 34 more — see full table ↓

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Product codeSpec
LSTSP-11005WCapacity: 0.5 kVA | Rated voltage: 1-phase AC 110 V | Type: Wall mount | Weight: 10 kg
LSTSP-12005WCapacity: 0.5 kVA | Rated voltage: 1-phase AC 220 V | Type: Wall mount | Weight: 10 kg
LSTSP-14005WCapacity: 0.5 kVA | Rated voltage: 1-phase AC 240 V | Type: Wall mount | Weight: 10 kg
LSTSP-18005WCapacity: 0.5 kVA | Rated voltage: 1-phase AC 208 V | Type: Wall mount | Weight: 10 kg
LSTSP-11010SCapacity: 1 kVA | Rated voltage: 1-phase AC 110 V | Type: Stand | Weight: 18 kg
LSTSP-11010WCapacity: 1 kVA | Rated voltage: 1-phase AC 110 V | Type: Wall mount | Weight: 18 kg
LSTSP-12010SCapacity: 1 kVA | Rated voltage: 1-phase AC 220 V | Type: Stand | Weight: 18 kg
LSTSP-12010WCapacity: 1 kVA | Rated voltage: 1-phase AC 220 V | Type: Wall mount | Weight: 18 kg
LSTSP-14010SCapacity: 1 kVA | Rated voltage: 1-phase AC 240 V | Type: Stand | Weight: 18 kg
LSTSP-14010WCapacity: 1 kVA | Rated voltage: 1-phase AC 240 V | Type: Wall mount | Weight: 18 kg
LSTSP-18010SCapacity: 1 kVA | Rated voltage: 1-phase AC 208 V | Type: Stand | Weight: 18 kg
LSTSP-18010WCapacity: 1 kVA | Rated voltage: 1-phase AC 208 V | Type: Wall mount | Weight: 18 kg
LSTSP-11020SCapacity: 2 kVA | Rated voltage: 1-phase AC 110 V | Type: Stand | Weight: 27 kg
LSTSP-11020WCapacity: 2 kVA | Rated voltage: 1-phase AC 110 V | Type: Wall mount | Weight: 27 kg
LSTSP-12020SCapacity: 2 kVA | Rated voltage: 1-phase AC 220 V | Type: Stand | Weight: 27 kg
LSTSP-12020WCapacity: 2 kVA | Rated voltage: 1-phase AC 220 V | Type: Wall mount | Weight: 27 kg
LSTSP-14020SCapacity: 2 kVA | Rated voltage: 1-phase AC 240 V | Type: Stand | Weight: 27 kg
LSTSP-14020WCapacity: 2 kVA | Rated voltage: 1-phase AC 240 V | Type: Wall mount | Weight: 27 kg
LSTSP-18020SCapacity: 2 kVA | Rated voltage: 1-phase AC 208 V | Type: Stand | Weight: 27 kg
LSTSP-18020WCapacity: 2 kVA | Rated voltage: 1-phase AC 208 V | Type: Wall mount | Weight: 27 kg
LSTSP-11030SCapacity: 3 kVA | Rated voltage: 1-phase AC 110 V | Type: Stand | Weight: 31 kg
LSTSP-11030WCapacity: 3 kVA | Rated voltage: 1-phase AC 110 V | Type: Wall mount | Weight: 31 kg
LSTSP-12030SCapacity: 3 kVA | Rated voltage: 1-phase AC 220 V | Type: Stand | Weight: 31 kg
LSTSP-12030WCapacity: 3 kVA | Rated voltage: 1-phase AC 220 V | Type: Wall mount | Weight: 31 kg
LSTSP-14030SCapacity: 3 kVA | Rated voltage: 1-phase AC 240 V | Type: Stand | Weight: 31 kg
LSTSP-14030WCapacity: 3 kVA | Rated voltage: 1-phase AC 240 V | Type: Wall mount | Weight: 31 kg
LSTSP-18030SCapacity: 3 kVA | Rated voltage: 1-phase AC 208 V | Type: Stand | Weight: 31 kg
LSTSP-18030WCapacity: 3 kVA | Rated voltage: 1-phase AC 208 V | Type: Wall mount | Weight: 31 kg
LSTSP-11050SCapacity: 5 kVA | Rated voltage: 1-phase AC 110 V | Type: Stand | Weight: 44 kg (T: 46 kg)
LSTSP-11050TCapacity: 5 kVA | Rated voltage: 1-phase AC 110 V | Type: Tower | Weight: 44 kg (T: 46 kg)
LSTSP-12050SCapacity: 5 kVA | Rated voltage: 1-phase AC 220 V | Type: Stand | Weight: 44 kg (T: 46 kg)
LSTSP-12050TCapacity: 5 kVA | Rated voltage: 1-phase AC 220 V | Type: Tower | Weight: 44 kg (T: 46 kg)
LSTSP-14050SCapacity: 5 kVA | Rated voltage: 1-phase AC 240 V | Type: Stand | Weight: 44 kg (T: 46 kg)
LSTSP-14050TCapacity: 5 kVA | Rated voltage: 1-phase AC 240 V | Type: Tower | Weight: 44 kg (T: 46 kg)
LSTSP-18050SCapacity: 5 kVA | Rated voltage: 1-phase AC 208 V | Type: Stand | Weight: 44 kg (T: 46 kg)
LSTSP-18050TCapacity: 5 kVA | Rated voltage: 1-phase AC 208 V | Type: Tower | Weight: 44 kg (T: 46 kg)
LSTSP-11100SCapacity: 10 kVA | Rated voltage: 1-phase AC 110 V | Type: Stand | Weight: 48 kg (T: 55 kg)
LSTSP-11100TCapacity: 10 kVA | Rated voltage: 1-phase AC 110 V | Type: Tower | Weight: 48 kg (T: 55 kg)
LSTSP-12100SCapacity: 10 kVA | Rated voltage: 1-phase AC 220 V | Type: Stand | Weight: 48 kg (T: 55 kg)
LSTSP-12100TCapacity: 10 kVA | Rated voltage: 1-phase AC 220 V | Type: Tower | Weight: 48 kg (T: 55 kg)
LSTSP-14100SCapacity: 10 kVA | Rated voltage: 1-phase AC 240 V | Type: Stand | Weight: 48 kg (T: 55 kg)
LSTSP-14100TCapacity: 10 kVA | Rated voltage: 1-phase AC 240 V | Type: Tower | Weight: 48 kg (T: 55 kg)
LSTSP-18100SCapacity: 10 kVA | Rated voltage: 1-phase AC 208 V | Type: Stand | Weight: 48 kg (T: 55 kg)
LSTSP-18100TCapacity: 10 kVA | Rated voltage: 1-phase AC 208 V | Type: Tower | Weight: 48 kg (T: 55 kg)

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