• LS Electric USP Series UL DIN-Rail AC Surge Protective Device
1 1

LS Electric USP Series UL DIN-Rail AC Surge Protective Device

LS Electric USP Series UL DIN-Rail AC Surge Protective Device

LS Electric USP series UL Recognized Type 1CA plug-in DIN-rail surge protective devices for North American AC power systems up to 600 V.

Key features

  • ANSI/UL1449 5th edition and CSA C22.2 Type 1CA; IEC/EN 61643-11 Class II
  • MCOV 150 to 690 V AC; In 20 kA, Imax 50 kA (40 kA for 550/690 V)
  • Single phase, split phase, WYE, DELTA and high-leg DELTA protection modes
  • Short-circuit current rating (SCCR) 200 kA
  • Pluggable modules with window flag indicator; isolated Form C remote alarm (AL option)

Specifications

Standards ANSI/UL1449 5th Type 1CA, CSA C22.2, IEC/EN 61643-11 Class II
Connection Parallel connected
Nominal discharge current In 20 kA
Max. discharge current Imax 50 kA (550/690 V: 40 kA)
SCCR 200 kA
Status indication Flag: green normal, red failure
Degree of protection IP20, UL94 V0
Operating temperature -40 to 85 C
Options AL remote alarm contact (-AL suffix)
Source LS Electric Surge Protective Device catalog C01551-07 (2025-10), p. 33-38
USP-320-3LDG MCOV: 320 V | Rated voltage Un: 240-277 V | Protection mode: Three phase DELTA 3W+G, 3+0 | Poles: 3
USP-550-3LDG MCOV: 550 V | Rated voltage Un: up to 480 V | Protection mode: Three phase DELTA 3W+G, 3+0 | Poles: 3
USP-690-3LDG MCOV: 690 V | Rated voltage Un: up to 600 V | Protection mode: Three phase DELTA 3W+G, 3+0 | Poles: 3
USP-240-3LHDG MCOV: 150 V / 320 V (H) | Rated voltage Un: 120/240 V | Protection mode: High-leg DELTA 4W+G, 4+0 | Poles: 4
USP-480-3LHDG MCOV: 320 V / 550 V (H) | Rated voltage Un: 240/480 V | Protection mode: High-leg DELTA 4W+G, 4+0 | Poles: 4
USP-150-2LNG MCOV: 150 V | Rated voltage Un: 120 V | Protection mode: Split phase 3W+G, 3+0 | Poles: 3
USP-150-2LG MCOV: 150 V | Rated voltage Un: 120 V | Protection mode: Split phase 2W+G, 2+0 | Poles: 2
USP-150-2LN MCOV: 150 V | Rated voltage Un: 120 V | Protection mode: Split phase 3W, 2+0 | Poles: 2
USP-180-2LNG MCOV: 180 V | Rated voltage Un: 120-127 V | Protection mode: Split phase 3W+G, 3+0 | Poles: 3
USP-180-2LG MCOV: 180 V | Rated voltage Un: 120-127 V | Protection mode: Split phase 2W+G, 2+0 | Poles: 2
USP-180-2LN MCOV: 180 V | Rated voltage Un: 120-127 V | Protection mode: Split phase 3W, 2+0 | Poles: 2
USP-320-2LNG MCOV: 320 V | Rated voltage Un: 240-277 V | Protection mode: Split phase 3W+G, 3+0 | Poles: 3
USP-320-2LG MCOV: 320 V | Rated voltage Un: 240-277 V | Protection mode: Split phase 2W+G, 2+0 | Poles: 2
USP-320-2LN MCOV: 320 V | Rated voltage Un: 240-277 V | Protection mode: Split phase 3W, 2+0 | Poles: 2
USP-150-3LG MCOV: 150 V | Rated voltage Un: 120 V | Protection mode: Three phase WYE 3W+G, 3+0 | Poles: 3
USP-180-3LG MCOV: 180 V | Rated voltage Un: 120-127 V | Protection mode: Three phase WYE 3W+G, 3+0 | Poles: 3
USP-275-3LG MCOV: 275 V | Rated voltage Un: 220-230 V | Protection mode: Three phase WYE 3W+G, 3+0 | Poles: 3
USP-320-3LG MCOV: 320 V | Rated voltage Un: 240-277 V | Protection mode: Three phase WYE 3W+G, 3+0 | Poles: 3
USP-385-3LG MCOV: 385 V | Rated voltage Un: 240-277 V | Protection mode: Three phase WYE 3W+G, 3+0 | Poles: 3
USP-420-3LG MCOV: 420 V | Rated voltage Un: 277-347 V | Protection mode: Three phase WYE 3W+G, 3+0 | Poles: 3
USP-150-4LG MCOV: 150 V | Rated voltage Un: 120 V | Protection mode: Three phase WYE 4W+G, 4+0 | Poles: 4
USP-180-4LG MCOV: 180 V | Rated voltage Un: 120-127 V | Protection mode: Three phase WYE 4W+G, 4+0 | Poles: 4
USP-275-4LG MCOV: 275 V | Rated voltage Un: 220-230 V | Protection mode: Three phase WYE 4W+G, 4+0 | Poles: 4
USP-320-4LG MCOV: 320 V | Rated voltage Un: 240-277 V | Protection mode: Three phase WYE 4W+G, 4+0 | Poles: 4
USP-385-4LG MCOV: 385 V | Rated voltage Un: 240-277 V | Protection mode: Three phase WYE 4W+G, 4+0 | Poles: 4
USP-420-4LG MCOV: 420 V | Rated voltage Un: 277-347 V | Protection mode: Three phase WYE 4W+G, 4+0 | Poles: 4
USP-150-3LNG MCOV: 150 V | Rated voltage Un: 120 V | Protection mode: Three phase WYE 4W+G, 3+1 | Poles: 4
USP-180-3LNG MCOV: 180 V | Rated voltage Un: 120-127 V | Protection mode: Three phase WYE 4W+G, 3+1 | Poles: 4
USP-275-3LNG MCOV: 275 V | Rated voltage Un: 220-230 V | Protection mode: Three phase WYE 4W+G, 3+1 | Poles: 4
USP-320-3LNG MCOV: 320 V | Rated voltage Un: 240-277 V | Protection mode: Three phase WYE 4W+G, 3+1 | Poles: 4
USP-385-3LNG MCOV: 385 V | Rated voltage Un: 240-277 V | Protection mode: Three phase WYE 4W+G, 3+1 | Poles: 4
USP-420-3LNG MCOV: 420 V | Rated voltage Un: 277-347 V | Protection mode: Three phase WYE 4W+G, 3+1 | Poles: 4
USP-150-1LN MCOV: 150 V | Rated voltage Un: 120 V | Protection mode: Single phase 2W+G, 2+0 | Poles: 2
USP-180-1LN MCOV: 180 V | Rated voltage Un: 120-127 V | Protection mode: Single phase 2W+G, 2+0 | Poles: 2
USP-275-1LN MCOV: 275 V | Rated voltage Un: 220-230 V | Protection mode: Single phase 2W+G, 2+0 | Poles: 2
USP-320-1LN MCOV: 320 V | Rated voltage Un: 240-277 V | Protection mode: Single phase 2W+G, 2+0 | Poles: 2
USP-385-1LN MCOV: 385 V | Rated voltage Un: 240-277 V | Protection mode: Single phase 2W+G, 2+0 | Poles: 2
USP-420-1LN MCOV: 420 V | Rated voltage Un: 277-347 V | Protection mode: Single phase 2W+G, 2+0 | Poles: 2
USP-150-1LNG MCOV: 150 V | Rated voltage Un: 120 V | Protection mode: Single phase 2W+G, 1+1 | Poles: 2
USP-180-1LNG MCOV: 180 V | Rated voltage Un: 120-127 V | Protection mode: Single phase 2W+G, 1+1 | Poles: 2
USP-275-1LNG MCOV: 275 V | Rated voltage Un: 220-230 V | Protection mode: Single phase 2W+G, 1+1 | Poles: 2
USP-320-1LNG MCOV: 320 V | Rated voltage Un: 240-277 V | Protection mode: Single phase 2W+G, 1+1 | Poles: 2
USP-385-1LNG MCOV: 385 V | Rated voltage Un: 240-277 V | Protection mode: Single phase 2W+G, 1+1 | Poles: 2
USP-420-1LNG MCOV: 420 V | Rated voltage Un: 277-347 V | Protection mode: Single phase 2W+G, 1+1 | Poles: 2
Surge Protective DevicesLS Electric
44 product codes available in this family
Sourced direct from KoreaExport-ready supplyCompetitive pricing
RFQ List 0 Email about this

Need a different model, or a part not listed here? Send us your parts list →

LS Electric USP Series UL DIN-Rail AC Surge Protective Device

Brand LS Electric·Surge Protective Devices

Available part numbers (44)

USP-320-3LDG, USP-550-3LDG, USP-690-3LDG, USP-240-3LHDG, USP-480-3LHDG, USP-150-2LNG, USP-150-2LG, USP-150-2LN, USP-180-2LNG, USP-180-2LG + 34 more — see full table ↓

How to order

Send the LS Electric part numbers and quantities through our RFQ form or to info@prosourcemro.com. We confirm price, availability and lead time within 1 business day — no account needed.

RFQ List 0 →
View full details
Product codes & specifications
0 selected
RFQ List (0)
Product codeSpec
USP-320-3LDGMCOV: 320 V | Rated voltage Un: 240-277 V | Protection mode: Three phase DELTA 3W+G, 3+0 | Poles: 3
USP-550-3LDGMCOV: 550 V | Rated voltage Un: up to 480 V | Protection mode: Three phase DELTA 3W+G, 3+0 | Poles: 3
USP-690-3LDGMCOV: 690 V | Rated voltage Un: up to 600 V | Protection mode: Three phase DELTA 3W+G, 3+0 | Poles: 3
USP-240-3LHDGMCOV: 150 V / 320 V (H) | Rated voltage Un: 120/240 V | Protection mode: High-leg DELTA 4W+G, 4+0 | Poles: 4
USP-480-3LHDGMCOV: 320 V / 550 V (H) | Rated voltage Un: 240/480 V | Protection mode: High-leg DELTA 4W+G, 4+0 | Poles: 4
USP-150-2LNGMCOV: 150 V | Rated voltage Un: 120 V | Protection mode: Split phase 3W+G, 3+0 | Poles: 3
USP-150-2LGMCOV: 150 V | Rated voltage Un: 120 V | Protection mode: Split phase 2W+G, 2+0 | Poles: 2
USP-150-2LNMCOV: 150 V | Rated voltage Un: 120 V | Protection mode: Split phase 3W, 2+0 | Poles: 2
USP-180-2LNGMCOV: 180 V | Rated voltage Un: 120-127 V | Protection mode: Split phase 3W+G, 3+0 | Poles: 3
USP-180-2LGMCOV: 180 V | Rated voltage Un: 120-127 V | Protection mode: Split phase 2W+G, 2+0 | Poles: 2
USP-180-2LNMCOV: 180 V | Rated voltage Un: 120-127 V | Protection mode: Split phase 3W, 2+0 | Poles: 2
USP-320-2LNGMCOV: 320 V | Rated voltage Un: 240-277 V | Protection mode: Split phase 3W+G, 3+0 | Poles: 3
USP-320-2LGMCOV: 320 V | Rated voltage Un: 240-277 V | Protection mode: Split phase 2W+G, 2+0 | Poles: 2
USP-320-2LNMCOV: 320 V | Rated voltage Un: 240-277 V | Protection mode: Split phase 3W, 2+0 | Poles: 2
USP-150-3LGMCOV: 150 V | Rated voltage Un: 120 V | Protection mode: Three phase WYE 3W+G, 3+0 | Poles: 3
USP-180-3LGMCOV: 180 V | Rated voltage Un: 120-127 V | Protection mode: Three phase WYE 3W+G, 3+0 | Poles: 3
USP-275-3LGMCOV: 275 V | Rated voltage Un: 220-230 V | Protection mode: Three phase WYE 3W+G, 3+0 | Poles: 3
USP-320-3LGMCOV: 320 V | Rated voltage Un: 240-277 V | Protection mode: Three phase WYE 3W+G, 3+0 | Poles: 3
USP-385-3LGMCOV: 385 V | Rated voltage Un: 240-277 V | Protection mode: Three phase WYE 3W+G, 3+0 | Poles: 3
USP-420-3LGMCOV: 420 V | Rated voltage Un: 277-347 V | Protection mode: Three phase WYE 3W+G, 3+0 | Poles: 3
USP-150-4LGMCOV: 150 V | Rated voltage Un: 120 V | Protection mode: Three phase WYE 4W+G, 4+0 | Poles: 4
USP-180-4LGMCOV: 180 V | Rated voltage Un: 120-127 V | Protection mode: Three phase WYE 4W+G, 4+0 | Poles: 4
USP-275-4LGMCOV: 275 V | Rated voltage Un: 220-230 V | Protection mode: Three phase WYE 4W+G, 4+0 | Poles: 4
USP-320-4LGMCOV: 320 V | Rated voltage Un: 240-277 V | Protection mode: Three phase WYE 4W+G, 4+0 | Poles: 4
USP-385-4LGMCOV: 385 V | Rated voltage Un: 240-277 V | Protection mode: Three phase WYE 4W+G, 4+0 | Poles: 4
USP-420-4LGMCOV: 420 V | Rated voltage Un: 277-347 V | Protection mode: Three phase WYE 4W+G, 4+0 | Poles: 4
USP-150-3LNGMCOV: 150 V | Rated voltage Un: 120 V | Protection mode: Three phase WYE 4W+G, 3+1 | Poles: 4
USP-180-3LNGMCOV: 180 V | Rated voltage Un: 120-127 V | Protection mode: Three phase WYE 4W+G, 3+1 | Poles: 4
USP-275-3LNGMCOV: 275 V | Rated voltage Un: 220-230 V | Protection mode: Three phase WYE 4W+G, 3+1 | Poles: 4
USP-320-3LNGMCOV: 320 V | Rated voltage Un: 240-277 V | Protection mode: Three phase WYE 4W+G, 3+1 | Poles: 4
USP-385-3LNGMCOV: 385 V | Rated voltage Un: 240-277 V | Protection mode: Three phase WYE 4W+G, 3+1 | Poles: 4
USP-420-3LNGMCOV: 420 V | Rated voltage Un: 277-347 V | Protection mode: Three phase WYE 4W+G, 3+1 | Poles: 4
USP-150-1LNMCOV: 150 V | Rated voltage Un: 120 V | Protection mode: Single phase 2W+G, 2+0 | Poles: 2
USP-180-1LNMCOV: 180 V | Rated voltage Un: 120-127 V | Protection mode: Single phase 2W+G, 2+0 | Poles: 2
USP-275-1LNMCOV: 275 V | Rated voltage Un: 220-230 V | Protection mode: Single phase 2W+G, 2+0 | Poles: 2
USP-320-1LNMCOV: 320 V | Rated voltage Un: 240-277 V | Protection mode: Single phase 2W+G, 2+0 | Poles: 2
USP-385-1LNMCOV: 385 V | Rated voltage Un: 240-277 V | Protection mode: Single phase 2W+G, 2+0 | Poles: 2
USP-420-1LNMCOV: 420 V | Rated voltage Un: 277-347 V | Protection mode: Single phase 2W+G, 2+0 | Poles: 2
USP-150-1LNGMCOV: 150 V | Rated voltage Un: 120 V | Protection mode: Single phase 2W+G, 1+1 | Poles: 2
USP-180-1LNGMCOV: 180 V | Rated voltage Un: 120-127 V | Protection mode: Single phase 2W+G, 1+1 | Poles: 2
USP-275-1LNGMCOV: 275 V | Rated voltage Un: 220-230 V | Protection mode: Single phase 2W+G, 1+1 | Poles: 2
USP-320-1LNGMCOV: 320 V | Rated voltage Un: 240-277 V | Protection mode: Single phase 2W+G, 1+1 | Poles: 2
USP-385-1LNGMCOV: 385 V | Rated voltage Un: 240-277 V | Protection mode: Single phase 2W+G, 1+1 | Poles: 2
USP-420-1LNGMCOV: 420 V | Rated voltage Un: 277-347 V | Protection mode: Single phase 2W+G, 1+1 | Poles: 2

Need a different model, or a part not listed here? Send us your parts list →

Related products

All Circuit Breakers & Contactors →