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Toshiba 2N3A8204-B
Toshiba 2N3A8204-B

TE Connectivity 27E121

Product Name: TE Connectivity Potter & Brumfield 27E121 3-Pole Relay Socket

Product Introduction: The 27E121 is an 11-pin, 3-pole relay socket from TE Connectivity’s Potter & Brumfield KU series. It provides a reliable electrical interface for industrial relays, supporting both DIN rail and panel mounting with screw terminal connections for secure wire retention.

Category:
Description
Technical Specifications:
  • Pole configuration: 3 poles
  • Total pin count: 11 pins
  • Terminal type: Screw termination
  • Current rating: 15 A per pole
  • Voltage rating: 300 V general use / 240 VAC UL rated
  • Body material: Nylon thermoplastic
  • Contact plating: Tin
  • Contact base material: Spring brass
  • Mounting method: DIN rail / panel mount

    Functional Features:

  • Dual mounting flexibility: DIN rail clip or direct panel screw mounting
  • Screw terminals accept both solid and stranded conductors
  • High-dielectric nylon body withstands thermal cycling and electrical stress
  • Spring brass contacts maintain stable electrical conductivity
  • Compatible with KUP, KUEP, KUGP, KUIP, KUL, KUMP series relays and CL/CU time delay relays

    Application Scenarios:

  • Industrial control panels
  • HVACR control systems
  • Manufacturing automation circuits
  • Power distribution assemblies
  • Motor control and protection circuits

    Performance Parameters:

  • 15 A current carrying capacity per pole
  • High dielectric insulation between contact circuits
  • Low stable contact resistance over service life
  • High mechanical durability for repeated relay insertion/removal

    Material & Structure:

  • Body: High-temperature nylon thermoplastic
  • Contact system: Spring brass base with tin plating
  • Mounting hardware: Corrosion-resistant steel
  • Integrated hold-down springs for secure relay retention

    Working Principle: The socket provides a fixed wiring interface between field conductors and a plug-in relay. Screw terminals clamp field wires to internal contact blades, which mate with relay pins when the relay is fully seated. This design enables quick relay replacement without rewiring field connections.

    Installation Requirements:

  • Mount on standard 35 mm DIN rail or directly to panel via mounting holes
  • Torque screw terminals to manufacturer-specified values
  • Use proper wire stripping length to prevent short circuits
  • Do not exceed rated current and voltage values
  • Maintain appropriate clearance between adjacent sockets

    Usage Notes:

  • Use only with specified relay series to ensure proper fit and electrical rating
  • Tighten terminals securely to prevent overheating and arcing
  • Do not solder relay pins while inserted in the socket, as heat may damage the plastic body
  • Inspect contacts periodically for corrosion or wear in harsh environments
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