E-T-A Circuit Breakers EPR10 Solid-State Power Relays

E-T-A EPR10 Solid-State Power Relays are suitable for high continuous currents and in applications where reliability/functional safety is at a premium, for 12VDC/24VDC robust load requirements in onboard electrical systems, and in utility/special vehicles. These protective power relays monitor the load current and thermal load. In any event of a critical condition, the EPR10 relays will automatically interrupt the circuit and issue a group fault signal. The EPR10 devices require 80% less space than the conventional solid-state relays and offer less CO2 emission. These relays allow a continuous load up to 200A at 24VDC and a 36VDC maximum overvoltage.

Features

  • 80% less space requirement than the conventional solid-state relays
    • No heat sink required
    • Low internal resistance through a parallel connection of power semiconductors
    • Technically mature heat management
    • Cooling through connecting cables
  • Low investment cost, blade fuses in sub-paths and heat sinks are superfluous because the EPR protects against overcurrent and short circuit
  • Minimized maintenance cost
    • Longer life-span than mechanical relays
    • High resistance against dust, humidity, vibration, and shock due to sealed electronic circuitry
  • Less CO2 emission
    • Low internal resistance
    • Minor holding power
  • Device switches without a sound which makes it suitable for installation in passenger cabins

Applications

  • Pumps
  • Ventilation
  • Cooling systems

Specifications

  • 12VDC/24VDC system voltage
  • 36VDC maximum overvoltage 
  • 75A, 100A, 125A, 150A, 175A, and 200A current rating variants
  • 85mV voltage drop
  • 1Hz maximum switching frequency
  • <10µA leakage current, 20µA maximum
  • 2A maximum load current
  • IP57 degree of protection
  • Temperature ranges
    • -40°C to 85°C operating
    • -55°C to +90°C storage
  • Vibration of more than 6g
  • 163mm x 73mm x 35mm in dimension
  • Tin-plated copper terminals
  • Stainless steel terminal studs
  • 15Nm maximum tightening torque

Schematic

Schematic - E-T-A Circuit Breakers EPR10 Solid-State Power Relays

Dimensions

Mechanical Drawing - E-T-A Circuit Breakers EPR10 Solid-State Power Relays
Publicado: 2017-08-04 | Actualizado: 2022-05-23