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Square D SSP05EMA24S - Type EMA SPD 20kA (277/480VAC 3-Phase)

Square D
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Square D SSP05EMA24S is a Type EMA surge protective device (SPD) designed for safeguarding three-phase power distribution systems against transient overvoltages. This unit operates on a 277/480VAC system with a 20kA nominal discharge current rating and supports 3-wire configurations. Housed in a stainless steel NEMA 4X rated enclosure, it measures 22.7 in (575.8 mm) x 11.7 in (297.2 mm) x 9.4 in (238.8 mm) and weighs 32.201 lb, featuring surface mounting and copper wire connections from AWG 10 to AWG 2. It complies with CSA C22.2 No 8, UL 1449 Edition 4, and UL 1283 Edition 5 standards, holding UL and CSA certifications. Typical applications include industrial power distribution panels, motor control centers, and critical equipment protection in harsh environments.

Key Features & Specifications
  • Type: QO
  • Family: EMA
  • Manufacturer: Schneider Electric
  • Country of Origin: United States
  • Voltage Rating: 277/480VAC
  • Phase: 3
  • Wire: 3
  • Current Rating: 20kA
  • Surge Current Rating: 240 kA
  • Nominal Discharge Current: 20 kA
  • Mounting: Surface
  • Nema Rating: 4X
  • Enclosure Material: Stainless Steel
  • Dimensions: 22.7 in (575.8 mm) x 11.7 in (297.2 mm) x 9.4 in (238.8 mm) (Height x Width x Depth)
  • Weight: 32.201 lb
  • Wire Size: AWG 10 to AWG 2, Copper
  • Temp Rating: -13–158 °F (-25–70 °C)
  • Standards: CSA C22.2 No 8, UL 1449:ed. 4, UL 1283:ed. 5
  • Certification: UL, CSA
  • Configuration: Type 1 SPD
  • Features: Audible and visual signaling, fuse technology, flexible line or load side installation