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EPCOS / TDK MT40 Thermofuse Varistors

EPCOS / TDK MT40 Thermofuse Varistors feature a DC voltage range of 200V to 750V, an AC voltage range of 150V to 550V, and a high peak surge current of up to 50kA. The MT Thermofuse series provides a normally open micro-switch for a remote indication/monitoring circuit. These compact EPCOS / TDK metal oxide varistors are ideal for industrial power supplies, inverters, outdoor lighting systems, and telecommunication systems.

Features

  • Compact size
  • Voltage range
    • 150VAC to 550VAC
    • 200VDC to 750VDC
  • Up to 200kA short-circuit current rating (SCCR) according to UL1449
  • Up to 50kA high peak surge current
  • UL1449 recognized as a type 1CA for AC and DC applications (file number E321126)
  • Micro-switch normally open for remote indication/monitoring circuit
  • Same PCB electrode footprint for all types
  • RoHS compliant
  • Construction
    • Strap-terminated varistor with a thermal disconnecting system
    • Flame-retardant epoxy encapsulation
    • Patented over-molding design

Applications

  • Inverters
  • Industrial power supplies
  • Outdoor lighting systems
  • Telecommunication systems
  • Surge protection devices (SPDs)

Specifications

  • 40 / 85/ 56 climatic category to IEC 60068-1
  • -40°C to +85°C operating temperature range
  • <25ns response time
  • UL94-V0 (black color) coating material
  • IP20 ingress protection
  • ≥2500VAC electric strength
  • <5000m application altitude
  • Onboard installation

Typical Circuit Diagram

Application Circuit Diagram - EPCOS / TDK MT40 Thermofuse Varistors

Dimensions (mm)

Mechanical Drawing - EPCOS / TDK MT40 Thermofuse Varistors
Publicado: 2025-07-31 | Actualizado: 2025-07-31