SPDN-C Series - Surge Protection Device

Series: SPDN-C
External overview image
Roll Over to Zoom
Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

Surge protective devices (SPDs) provide equipment protection from transient overvoltage events lasting microseconds. By limiting the overvoltage to the equipment during these events, costly damage and downtime can be mitigated. The NEMA-style SPDN series for external panel mount is available for 120 V to 480 V nominal voltage sub-distribution board applications.


  • More direct modes of protection (L-N, N-G) in a smaller package
  • Capability to clamp and withstand high-energy transients
  • Stacked Metal Oxide Varistor (MOV) design
  • Installs on the line or load side of the circuit breaker
  • Thermally protected MOV
  • External LED indicator
  • Compact footprint


  • Increases protection and design flexibility
  • Ensures low-residual voltage during high-energy surge events and higher nominal discharge current to prevent disruption, downtime, and degradation or damage to equipment
  • Provides more high-transient voltage protection in a compact, multi-layered structure
  • Simplifies maintenance without impacting the other parts of the electrical system by turning breaker off during upkeep
  • Eliminates catastrophic failure
  • Quickly identifies service requirements to avoid loss of protection
  • Offers easy retrofit in existing applications where space is limited


  • Construction
  • Food and Beverage
  • HVAC/R
  • Light Industrial
  • Oil and Gas
  • Water/Wastewater

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)
Short Circuit (kA)Weight (lbs/g)Thermal ProtectionI-nominal RatingCommunicationsTouchsafeNeutralSamplesCompare
SPDN-C120-1P120200 kA1 LbYes20 kANoYesYesOrder
SPDN-C120-2S120/240200 kA1 LbYes20 kANoYesYesOrder
SPDN-C120-3Y208/120200 kA1 LbYes20 kANoYesYesOrder
SPDN-C240-1P240200 kA1 LbYes20 kANoYesYesOrder
SPDN-C240-3D240200 kA1 LbYes20 kANoYesNoOrder
SPDN-C277-3Y480/277200 kA1 LbYes20 kANoYesYesOrder
SPDN-C480-3D480200 kA1 LbYes20 kANoYesNoOrder
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
SPDN-C120-1P SPD, NEMA, 50KA, 120V, Single RoHS No 03/20/2023 PbFree No 03/20/2023 CoC_RoHS10_SPDN-C120-1P REACH_SVHC Declaration_SPDN-C120-1P
Does not Contain
SPDN-C120-2S SPD, NEMA, 50KA, 120V, Split RoHS No 03/20/2023 PbFree No 03/20/2023 CoC_RoHS10_SPDN-C120-2S REACH_SVHC Declaration_SPDN-C120-2S
Does not Contain
SPDN-C120-3Y SPD, NEMA, 50KA, 120V, Wye RoHS No 03/20/2023 PbFree No 03/20/2023 CoC_RoHS10_SPDN-C120-3Y REACH_SVHC Declaration_SPDN-C120-3Y
Does not Contain
SPDN-C240-1P SPD, NEMA, 50KA, 240V, Single RoHS No 03/20/2023 PbFree No 03/20/2023 CoC_RoHS10_SPDN-C240-1P REACH_SVHC Declaration_SPDN-C240-1P
Does not Contain
SPDN-C240-3D SPD, NEMA, 50KA, 240V, Delta RoHS No 03/20/2023 PbFree No 03/20/2023 CoC_RoHS10_SPDN-C240-3D REACH_SVHC Declaration_SPDN-C240-3D
Does not Contain
SPDN-C277-3Y SPD, NEMA, 50KA, 277V, Wye RoHS No 03/20/2023 PbFree No 03/20/2023 CoC_RoHS10_SPDN-C277-3Y REACH_SVHC Declaration_SPDN-C277-3Y
Does not Contain
SPDN-C480-3D SPD, NEMA, 50KA, 480V, Delta RoHS No 03/20/2023 PbFree No 03/20/2023 CoC_RoHS10_SPDN-C480-3D REACH_SVHC Declaration_SPDN-C480-3D
Does not Contain
If the product environmental information that you are looking for does not appear in this tab,
please complete the Product Environmental Information Request Form.