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    Capacitors

    Capacitors

    Durable and dependable capacitors ensure single-phase electric motors start quickly and run efficiently. Littelfuse meets those demands by producing motor hard start capacitor kits and motor run capacitors. The hard start kits for motors that produce between 0.5 hp and 10 hp include a start capacitor and a switching mechanism that cycles down the release of current as a motor reaches its operating speed. Run capacitors facilitate phase shifts so motors do not stall. Contact us if your application requires a run capacitor with a very high operating voltage.​

    • Capacitance ratings from 3 mFd to 292 mFd
    • Operate at frequencies between 50 Hz and 60 Hz
    • Maximum operating voltages of 277 Vac for hard start capacitors
    • Maximum operating voltages of 440 V ac for motor run capacitors
    • Operate at temperatures from –40 ℃ to +70 ℃
    • Net weight of 227 g
    • Hard start capacitors available with two or five wire leads
    • Single- and dual-run motor run capacitors available
    • Clip-, screw-, and strap-mounted versions available

     

    Capacitors Applications
    Highlights Section
    Single-phase electric motors
    Compressors
    HVAC fans
    Pumps

    EMI Filters-LCF

    LCFA common mode noise filters attenuate frequencies in electrical circuits that can damage devices, disrupt video, degrade signal reception, and introduce static in sound. The LCFA common mode filters made by Littelfuse also provide protection against electrostatic discharges and are approved for automotive applications. Importantly, the devices operate “invisibly” without interfering with the transmission of desirable signals. Place will find these filters range from data cables and laptops to LCDs and in-vehicle cameras.
    • Available with differential mode cutoff frequencies of up to 4.65 GHz at –3 dB
    • Insertion loss more of < –22 dB common mode noise attenuation in GHz range
    • Common mode impedance values at 100 MHz of 90 Ω ± 25 % and 100 Ω ± 25 %
    • Available with ampere ratings of 100 A and 150 A
    • Nonpolarized
    • AEC-Q200 qualified
    • RoHS compliant
    • Available with 4 or 8 pins
    • Ultra-low–profile designs (e.g., 1.27×1.00×0.60 mm) allow filters to fit in mobile phones, dongles, and USB ports
    • Protect electronic components from ESD caused by users touching or carrying devices
    • Protect electronic components from ESD caused by users touching or carrying devices

    EMI Filters-LCFE

    LCFE common mode noise filters suppress high-frequency waveforms that interfere with signals sent between electronic devices. Filters that Littelfuse produces for this use also incorporate two electrostatic discharge protection modules. The ESD protection modules protect devices and people from electrical shocks. When installed, common mode filters improve the performance of devices such as mobile phones, computer tablets, dongles, data cables, LCD displays, audio players, and IOT modules in home appliances.
    • Available with ampere ratings of 50 A and 100 A
    • Wide range of common mode impedance values (e.g., 12Ω ± 30 %, 120 Ω ± 25 %)
    • Wide range of cutoff frequencies (e.g., 3.38 GHz to 14.1 GHz)
    • RoHS compliant
    • Ultra-low–profile designs allow filter to fit in mobile phones, dongles, USB ports, and data cables
    • Protect electronic components from ESD caused by users touching or carrying devices
    • Can accommodate four inputs
    • Solder guaranteed to withstand 260 ℃ for 10 s

    Inductors

    Inductors
    Power inductors most often get used in consumer electronics to as current flows from a dc–dc converter to a power management integrated circuit. This keeps signals clear and increases efficiency. Littelfuse supplies these types of inductors as ultrathin metal alloy composite films that are shielded against electromagnetic interference.
    • Inductance ratings from 0.24 µH at 1 MHz ±20 % to 4.7 µH at 1 MHz ±20 %
    • Typical dc saturation current ratings while operating at 40 ℃ from 1.8 A to 5.8 A
    • Typical resistance ratings from 17 mΩ to 230 mΩ
    • Operate at temperatures from –40 ℃ to +125 ℃
    • Thicknesses of 800 µm or 1 mm
    • Certified lead-free, halogen-free, and RoHS compliant
    • International standard packages
    • Magnetically shielded
    • Low voltage and current losses
    • Compatible with lead-free reflow soldering processes

     

    Inductors Applications
    Highlights Section
    Dongles
    Flat screen TVs
    Game consoles
    Mobile phones and wearable devices
    Printers
    Tablets
    VR and AR headsets

    Automotive - Resistors

    Automotive resistors and shunts perform essential overcurrent protection and current-limiting functions in commercial and passenger vehicles. Littelfuse makes ATO® and MINI® resistors and ATO® shunts with ranges of circuit protection characteristics.

    Subcategories under Automotive – Resistors

     

    Use ATO®and MINI® automotive resistors to lower the voltage of current flowing to an electrical subsystem. Common applications for automotive resistors include fan motors, windshield wiper motors, and light dimmers.
    • Available with maximum power ratings of 0.25 W and 0.5 W
    • Available with peak inverse voltages of 400 V or 1 kV
    • Available with a very wide range of typical resistance ratings from 16.9 Ω to 10 kΩ
    • ATO resistors operate at temperatures ranging from –20 ℃ to +125 ℃
    • MINI resistors operate at temperatures ranging from –40 ℃ to +125 ℃
    • Nickel-zinc–plated cold rolled steel terminals
    • Thermoplastic housings
    • White housing helps identify ATO automotive resistor with 10 kΩ resistance rating
    • Blue housing helps identify MINI automotive resistor with highest resistance rating of 5.1 kΩ
    • Red housing helps identify MINI automotive resistor with lowest resistance rating of 16.9 Ω

    Current Sensing Resistors

    Current sense resistors enable precise power management, safe battery operation, and optimal motor control. Littelfuse helps electronic equipment manufacturers take advantage of these capabilities by producing metal foil and metal plate current sense resistors. Packaged like subminiature chip fuses, our current sense resistors save space on printed circuit boards, have ultra-low resistance ratings, and have a low TCR. We also make versions that are specifically engineered to serve as a jumper chip.

    Subcategories under Current Sensing Resistors

    AEC-Q200 Qualified Resistors

    Well-suited for use in EVs, electric motor drives, and server racks, AEC-Q200 qualified resistors offer low-cost solutions for measuring and controlling current flow. The miniature low-resistance, high-power chip resistors employ Kelvin-sensing technology to detect and reduce surge currents that could damage batteries or sensitive electronics.

    • Maximum resistance ratings from 500 µΩ ±1 % to 100 mΩ ±1 %
    • Power ratings from 200 mW to 3 W
    • Temperature coefficient of resistance (TCR) as low as ±30 ppm/°C between +20 °C and +60 °C
    • UL 94 V-0 flammability ratings
    • Lead-free, halogen-free, and RoHS compliant
    • Separate voltage sensing terminals
    • Available with two or four terminals
    • Excel at heat dissipation
    • Maintain low surface temperatures
    • Introduce minimal noise into signals
    • Small size
     
    Highlights Section
    • Automotive
    • Industrial
    • Telecommunications

    Metal Foil Surface Mount Resistors

    Metal foil surface mount resistors made by Littelfuse can help electrical equipment manufactures build more efficient and safer products. As current sense resistors with very low resistance value and low TCR, these devices are ideal for power management and motor control applications.
    • Resistance ratings from 0.5 mΩ ±1 % to 499 mΩ ±1 %
    • Power ratings from 330 mW to 4 W
    • Temperature coefficient of resistance (TCR) ratings of ±50 ppm/℃, ±75 ppm/℃, or ±150 ppm/℃
    • Ceramic substrate
    • UL-94 flammability ratings of V-0 or V-1
    • Lead-free, halogen-free, and RoHS compliant
    • Subminiature packages with low profiles
    • High voltage ratings
    • Separate voltage sensing terminals
    • Compatible with reflow soldering processes
    Highlights Section
    • Battery management system
    • Power supplies
    • Motor drive
    Metal Plate Surface Mount Resistors

    Metal Plate Surface Mount Resistors

    Metal plate surface mount resistors made by Littelfuse can help electrical equipment manufactures build more efficient and safer products. As current sense resistors with two terminals, the devices enable precise power management and accurate inductance measurement.
    • Resistance ratings from 0.5 ±1 % mΩ to 56 mΩ ±1 %
    • Power ratings of 2 W or 3 W
    • Temperature coefficient of resistance (TCR) ratings of ±50 ppm/℃, ±100 ppm/℃, or ±150 ppm/℃
    • Ceramic substrate
    • UL-94 flammability ratings of V-0 or V-1
    • Lead-free, halogen-free, and RoHS compliant
    • Subminiature 6.4×3.2 mm (2512) packages with low profiles
    • Compatible with lead-free soldering processes
    • Excellent heat dissipation

    Metal Plate Surface Mount Resistors Applications
    Highlights Section
    Managing power
    Measuring impedance in electrical systems with low equivalent series inductance (ESL)

    Metal Type Current Shunt Resistors

    Accurately measure and tightly control power distribution with Littelfuse metal type current shut resistors. These two-terminal ultra-low resistance metal type shunt resistors have higher power ratings than metal foil resistors, and they work equally well in ac or dc systems.
    • Maximum resistance ratings from 200 µΩ ±1 % to 4 mΩ ±5 %
    • Power ratings at 70 ℃ from 4 W to 15 W
    • Temperature coefficient of resistance (TCR) as low as ±50 ppm/°C between +20 °C and +60 °C
    • Lead-free, halogen-free, and RoHS compliant
    • Superior heat dissipation
    • High voltage
    • Long-term reliability
    • Small size

    Metal Type Current Shunt Resistors Applications
    Highlights Section
    Appliances
    Communication systems
    Data centers
    Energy storage systems
    EV chargers
    Hybrid vehicles
    Frequency converters
    Power supplies

    Surface Mount High Current Jumpers

    Surface Mount High Current Jumpers

    Surface mount high current jumper chips open, close, and protect circuits on printed circuit boards. The specialized metal foil current sense resistors perform similarly to resettable fuses, measuring and responding to increases and decreases of current flow. You often find them in computers and networking equipment. The jumper chips made by Littelfuse have high voltage ratings and maximum current ratings ranging from 8 A to 40 A.
    • Resistance ratings from 0.2 mΩ ±1 % to 1 mΩ ±1 %
    • Epoxy substrate
    • UL-94 flammability ratings of V-0 or V-1
    • Lead-free, halogen-free, and RoHS compliant
    • Subminiature packages (max. 1.6×3.2 mm) with low profiles (max. 0.4 mm)

    Surface Mount High Current Jumpers Applications
    Highlights Section
    Managing power
    Measuring impedance in electrical systems with low equivalent series inductance (ESL)