Littelfuse provides a wide range of PolySwitch circuit protection devices from overvoltage, overcurrent and overtemperature to new hybrid technologies. Developed with innovation know-how you'll be able to design your products with smarter protection. Littelfuse* Expertise Applied | Answers Delivered

Littelfuse Circuit Protection Littelfuse PolySwitch circuit protection products are a part of your everyday life. From your cell phone battery to your car’s steering wheel, we are helping to make your world safer and your electronics more reliable. To date, billions of Littelfuse PolySwitch devices are being used to help protect a wide range of electronic products in the computer, battery and portable electronics, consumer, automotive, industrial, home appliance and HVAC, and telecommunication markets. Products manufactured: in 1980 with the commercialized use of a Polymeric Positive Overcurrent,...

Benefits • Reduced warranty and service costs • Helps increase product reliability • Shock and vibration resistant for harsh environments • Wide variety of applications uses and configurations PolySwitch Resettable Devices Q RoHS compliant PolySwitch devices are used to help protect against damage caused by harmful overcurrent surges and overtemperature faults. Like traditional fuses, these devices limit the flow of dangerously high current during fault conditions. The PolySwitch device, however, resets after the fault is cleared and power to the circuit is removed, thereby helping to reduce...

Fast-Acting Chip Fuses Q RoHS compliant Fast-acting chip fuses help protect equipment from damage caused by overcurrent conditions when relatively fast clear times are required in DC power applications. The fuses' monolithic, multilayer design provides some of the highest current ratings on the market and the smallest footprint. Available in industry standard 0402, 0603 and 1206 chip sizes, they also reduce fuse aging, improve product reliability and resilience, and enhance high-temperature performance in a wide range of circuit protection designs. Benefits • Small size with high-current ratings...

Benefits • Very fast acting at 200% overload current level • Good inrush current withstanding capability • High reliability and resilience • Strong arc suppression characteristics Benefits • Fast acting at 250% overloads • Inrush current withstand capability at high overloads • Thin body for space-limited applications • Fiberglass-enforced epoxy fuse body for reliability • Symmetrical design with markings on both sides (optional) • Wire-in-air design increases safety • Meet environmental standards for greener designs 2410 Very Fast-Acting Chip Fuse Q RoHS compliant The 2410 (6125) fuse is a wire-in-air...

Benefits • Very fast acting at 200% and 300% overloads • Excellent inrush current withstanding capability at high overloads • Thin body for space limiting applications • Glass ceramic monolithic structure • Silver fusing element and silver termination with nickel and tin plating • RoHS compliant and lead-free materials • Symmetrical design with marking on both sides (optional) Benefits • High inrush current withstanding capability • Ceramic Monolithic structure • Silver fusing element and silver termination with nickel and tin plating • Excellent temperature stability • Strong arc suppression...

• Glass ceramic monolithic structure provides stability in application cycling • High-current rating in a small package allows more efficient use in system space • Strong arc suppression in overcurrent conditions Benefits • Time-delayed design prevents nuisance openings in pulsed and high inrush current applications • Small size with high-current ratings • Strong arc suppression characteristics High-Current-Rated Chip Fuses Q RoHS compliant The monolithic multilayer design helps to provide some of the highest current ratings available in the 1206 size and enhances high temperature performance...

Benefits • ESD protection for high-frequency applications (HDMI 1.3) • Smaller form factor for board space savings • Helps protect sensitive electronic circuits against damage caused by electrostatic discharge (ESD) events • Assists equipment to pass IEC 61000-4-2, level 4 testing PESD Protection Devices H RoHS compliant The Littelfuse Polymer ESD (PESD) line of devices helps protect I/O ports on HDMI 1.3, portable video players, LCD and plasma TVs, USB 2.0, digital visual interface (DVI) and antenna switches. PESD devices shunt electrostatic discharge away from sensitive circuitry in HDTV equipment,...

Benefits • Silicon ESD devices in an EIA-0201 and EIA-0402 sized rectangular SMT passive component package • Bi-directional operation eliminates orientation constraints • Standard PCB assembly and rework process • ESD protection in space-constrained portable electronics and mobile handsets • Helps protect electronic circuits against damage from ESD • Assists equipment to pass IEC61000-4-2, level 4 testing ChipSESD Devices Q RoHS compliant The Littelfuse ChipSESD family of Silicon ESD devices, available in EIA-0201 and EIA-0402 sized rectangular SMT passive component packages, can help protect...

Benefits • Helps provide overvoltage fault protection against damage caused by high energy surges • Suitable for use in sensitive equipment due to impulse sparkover response • Suitable for high-frequency applications • Highly reliable performance • New surface-mount devices for automated manufacturing Gas Discharge Tubes Q RoHS compliant Littelfuse GDTs (Gas Discharge Tubes) are placed in front of, and in parallel with, sensitive telecom equipment such as power lines, communication lines, signal lines and data transmission lines to help protect them from damage caused by transient surge voltages...

Benefits • Capable of handling the higher voltages and battery discharge rates found in high-capacity LiP and prismatic cell applications • Helps provide resettable overtemperature protection in high-capacity LiP and prismatic cell applications The rapidly expanding market for ultra-thin portable electronic devices, such as media tablets and ultra-thin PCs, has created demand for very thin, low-profile, lightweight and high-capacity Lithium Polymer (LiP) and prismatic cells. A new MHP (Metal Hybrid PPTC) device, the MHP-TAM device, offers a 9VDC rating and a higher current rating than typical...