T Series ThermoFuse™ Varistors

EPCOS offers their T series of intrinsically safe ThermoFuse varistors with a maximum operating voltage of 130 to 1000 VRMS

Image of EPCOS T Series ThermoFuse VaristorsEPCOS' T series of ThermoFuse varistors is a housed component, consisting of a disk varistor in series with a thermally coupled fuse. If the varistor overheats, the thermal fuse activates and disconnects it from the power circuit, which increases reliability and protects the equipment. Both the housing and the coating of the varistor are made of flame-retardant material. The ThermoFuse varistor has three terminal wires; two are connected to the active lines while the third terminal can be used for status signaling. The T series lineup currently comprises types that feature disk varistors with diameters of 14 mm and 20 mm and are designed for maximum operating voltages of between 130 and 1000 VRMS. The ThermoFuse varistors can withstand surge currents of up to 10.000 A (8/20 μs) and absorb up to 410 J (2 ms).

Features and Benefits
  • Disconnection function according to limited current abnormal overvoltage test in UL 1449, 3rd Edition, Section 39.4, and as per thermal stability test in IEC 61643, Edition 1 (2011), Section
  • Robust and flame-retardant housing for physical protection of adjacent components
  • Flammability according to UL 94 V-0
  • T14/ T20 pin compatible for same PCB layout and different surge current levels (130 V up to 420 V)
  • Terminal wires in line for easy assembly
  • 5 mm spring opening distance for reliable disconnection from power circuit
  • Rated voltages of 130 VRMS to 1000 VRMS
  • Transient voltage surge suppression (TVSS)
  • Communication and data systems
  • Household appliances
  • Drives
  • Inverters in solar power systems
  • Lighting applications
  • Power supply units

T Series

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
VARISTOR 430V 6KA 3SIPB72214T2271K105VARISTOR 430V 6KA 3SIP1598 - ImmediateView Details
VARISTOR 510V 6KA 3SIPB72214T2321K105VARISTOR 510V 6KA 3SIP79 - ImmediateView Details
VARISTOR 430V 10KA RADIAL BOXB72220T2271K105VARISTOR 430V 10KA RADIAL BOX17 - ImmediateView Details
VARISTOR 620V 10KA RADIAL BOXB72220T2381K105VARISTOR 620V 10KA RADIAL BOX208 - ImmediateView Details
Published: 2016-01-14