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PTC Resettable Fuses

 

Our Semifuse PTCs, manufactured by Fuzetec are resettable current fuses based on conductive polymer PTC technology. These PPTC fuses will happily carry its rated “hold” current until it is exceeded. If an over-current condition occurs, the PTC heats up, the resistance rises rapidly and therefore limits the through current to safe levels.

The PTC will remain in this “off” state until the applied voltage is removed and the PTC has cooled down. The PTC effectively then “resets” to its pre-fault level ready to protect again.

Semifuse PTC fuses supplied from ATC Semitec, are available in a wide range of current values from 0.1A to 14A. with voltages ratings up to 240V and formats.

These fuses have been successfully used within a variety of industries but particularly within battery power supplies, and fire alarm panels.

All these Semifuse PTC resettable fuses are operational between -40°C to 85°C.

All carry UL, CSA and Tuv approvals, and are available as a low-profile “strap”; through-hole p.c.b. or SMD design.

Call us today on 01606 871680 to discuss your application’s thermal sensor requirements.  Using our extensive technical knowledge and innovative supplier base, we will work with you to provide the optimum solution for your product.

 

  • Fuzetec SFSR resettable PTC fuses
    SEMIFUSE SFSR RESETTABLE PTC Fuse

    The Semifuse SFSR re-settable PPTC fuse provides reliable, non-cycling protection against short circuits in rechargeable batteries and electronic circuits.

    • Current ratings: 1.2A – 4.2A
    • Voltages between 15V – 30V (DC)
    • Working temperature: 40°C to 85°C
    • Nickel straps ideal for spot-welding directly to battery cells
  • SEMIFUSE SFLR RESETTABLE BATTERY STRAP PTC Fuse

    Semifuse SFLR PPTC fuses are ideal for high-power battery applications, providing reliable non-cycling protection against over-charging and short-circuits. With a lower resistance and a smaller mass, they provide faster trip times and improved battery protection.

    • Current ratings: 1.9A – 9.0A
    • Voltages between 15V – 20V (DC)
    • Temperature between -40°C to +85°C
    • Nickel straps for spot welding directly onto battery cells
  • SEMIFUSE SFLT BATTERY STRAP RESETTABLE PTC Fuse

    Semifuse SFLT resettable PPTC fuses offer improved battery protection, particularly in low-power battery applications. These PTC strap fuses provide reliable non-cycling protection against over-charging and short-circuits. By switching at lower temperatures, they have faster trip times, making them ideal for the latest generation of battery designs.

    • Current ratings: 0.7A – 3.4A
    • Voltage 24V (DC)
    • Temperature between: -40°C to +60°C
    • Nickel straps for spot welding directly onto battery cells
  • SEMIFUSE SFVT ULTRA SLIM BATTERY STRAP PTC Fuse

    Semifuse SFVT resettable PPTC  fuses are ideal for Li-ion battery protection.

    These are ultra-slim and have a 20% lower temperature trip compared to our standard series. They offer protection against over current and over temperature conditions.

    • Current ratings: 1.1A – 2.4A
    • Voltages 16V (DC)
    • Temperature between: -40°C to +60°C
    • Nickel straps for spot welding directly onto battery cells
  • SEMIFUSE SFR16F 16V RADIAL LEADED PTC Fuse

    The Semifuse SFR16F series of resettable PPTC fuses from Fuzetec provide short-circuit protection in automotive electronic circuits for short circuit currents up to 100A, and other low voltage DC designs.

    • Current ratings 2.5A to 14A
    • Voltages – 16VDC
    • Temperature between: -40°C to +60°C
    • Radial leads (fixings)
  • Semifuse SFR series Resettable PTC Fuse
    SEMIFUSE SFR30F 30V RADIAL LEADED PTC Fuse

    Our Semifuse SFR30F series of re-settable PPTC fuses are ideal for use to protect battery chargers, computer peripherals, rechargeable batteries etc.

    They provide re-settable short-circuit protection in low-voltage DC circuits for short circuit currents up to 40A.

    • Current ratings 0.9A to 9A
    • Voltages – 30VDC
    • Temperature between: -40°C to +60°C
    • Radial leads (fixings)
  • SEMIFUSE SFR60F 60V RADIAL LEADED PTC Fuse

    The Semifuse SFR60F series of PPTC re-settable fuses provide re-settable short-circuit protection in low voltage DC circuits up to 60V for short circuit currents up to 40A. Ideal for protecting power supplies, speakers, security and alarm systems, electric motors, etc.

    • Current ratings 0.05A to 3.75A
    • Voltages – 60VDC
    • Temperature between: -40°C to +60°C
    • Radial leads (fixings)
  • SEMIFUSE SFRV 240V RESETTABLE RADIAL LEADED PTC Fuse
    Semifuse SFRV 240V Resettable Radial Leaded PTC Fuse

    Thr Semifuse SFRV 240V re-settable PPTC fuses from Fuzetec are suitable for use with  transformers, electric motors and other electrical circuits, offering superior performance over conventional current fuses.

    • Current ratings – 0.05A to 2.0A
    • Max operating voltages – 240V AC/DC
    • Temperature between: -40°C to +60°C
    • Radial leads (fixings)
  • Semifuse SMD PTC Resettable Fuses (Surface Mount PTCs)

    Semifuse SMD PTC fuses are the most comprehensive available, with footprints from 0603 up to 2920.  They offer a surface mount solution for motherboards, computer peripherals, battery chargers and a multitude of electronic applications.

    • Current ratings: 0.01A to 3.0A
    • Max operating voltages: 60V AC/DC
    • Temperature between: -40°C to +60°C