Tools & Accessories Littelfuse

The Littelfuse SMBJ series is a specialized line of products designed to safeguard sensitive electronic equipment from voltage transients induced by lightning and other transient voltage events. These surge protection devices are engineered to provide robust protection against such electrical disturbances, ensuring the integrity and functionality of connected systems.

The Littelfuse SMBJ series is designed to safeguard sensitive electronic equipment from voltage transients caused by lightning and other transient voltage events. This series is specifically engineered for this purpose, ensuring the protection of your valuable devices.The SMBJ58CA, a model within this series, embodies these protective features. It is designed to provide robust shielding against voltage surges and transient events, thereby preserving the functionality and longevity of your electronic equipment.

The Littelfuse SMBJ series is designed to safeguard sensitive electronic equipment from voltage transients caused by lightning and other transient voltage events. This series is specifically engineered for the protection of electronic devices against such transient voltage surges, ensuring their reliable operation even in challenging environmental conditions.The SMBJ15CA model, part of this series, is a testament to Littelfuse's commitment to delivering high-quality, reliable solutions. It is designed with precision and care, ensuring that it meets the stringent requirements of modern electronic systems.

The LFT300603C - LFT Series Fuse Block is engineered for use with Class T fuses, offering a rated current of 60 Amperes. This model supports a voltage rating of up to 300 VAC. It is designed for efficient installation using either bolt-in or DIN rail mounting methods, which enhances its adaptability in various electrical systems.These fuse blocks provide significant space savings compared to earlier versions, making them a practical choice for optimizing panel layouts. The design focuses on improving functionality while maintaining compliance with industry standards, ensuring reliable performance in demanding applications.

The UltraMOV 25S Varistor Series is engineered for demanding environments where high peak surge current ratings and significant energy absorption are essential. This series is particularly suitable for AC Line Voltage applications, providing voltage clamping to manage high transient surge currents effectively. The devices feature a compact 25mm square form factor, housed in a radial lead package with straight leads for straightforward installation. Constructed with a recognized epoxy encapsulation, the UltraMOV varistors maintain performance across ambient temperatures reaching up to 85°C without derating. Specifically, the V25S115P variant supports a maximum AC voltage of 115V and accommodates a maximum rated DC voltage of 150V. It delivers surge energy absorption of 230J and can withstand a peak pulse current of 22,000A. With a clamp voltage of 295V and bi-directional clamp polarity, this series ensures effective protection against voltage spikes. The typical capacitance is rated at 4500pF, making it suitable for a wide range of applications. The 25S Series is LASER-branded and comes in bulk packaging for convenience.

The TMOV34S Series thermally protected varistor is a specialized component intended for over-voltage circuit protection. Featuring a 34mm square format, this varistor incorporates a thermally activated element that disconnects the device in cases of overheating caused by excessive voltage or limited current. This design provides rapid thermal response owing to the thermal element's proximity to the varistor body.Additionally, select TMOV34S devices include a monitor lead that can be integrated with signaling circuitry, allowing for monitoring of the varistor's operational status. The integrated design not only enhances thermal response but also reduces inductance compared to traditional discrete solutions, leading to superior clamping performance during fast over-voltage transients. The TMOV34S Series is currently pending UL1449 3rd Edition approval for its innovative thermal element features. For further inquiries or alternative options, consultation with a product representative is recommended.

The MLA Automotive Series utilizes advanced multilayer fabrication technology for transient voltage surge suppression. These devices effectively mitigate various transient events, adhering to standards such as IEC 61000-4-2, integral for ensuring Electromagnetic Compliance (EMC). Typically employed to protect integrated circuits and other components within circuit boards, this series supports a broad range of applications across power supply, control, and signal lines. Manufactured from semiconducting ceramics, the devices feature a leadless, surface mount package that is compatible with contemporary reflow and wave soldering processes. Notably, the MLA Automotive Series operates over a wider temperature range compared to traditional Zener diodes and occupies a significantly smaller footprint than plastic-housed alternatives. Its specifications include a maximum rated DC voltage of 18V, a maximum clamp voltage of 50V, and a typical capacitance of 120pF, making it suitable for diverse applications.

The L60030C-1PQDINR model from the L600C-DINR Series features a 30 Ampere rating and is designed for use with Class CC fuses. This fuse block integrates directly with 35mm 'hat' type DIN rails, allowing for secure mounting without the need for additional adapters. The innovative releasable mechanism simplifies the installation and removal process, enabling efficient access without disturbing adjacent components on the DIN rail. With a voltage rating of 600 VAC, this unit is suitable for various electrical panel and machine building applications, streamlining assembly and reducing costs.

The SE-325 Neutral-Grounding-Resistor Monitor is designed for use in resistance-grounded systems with voltages up to 25 kV. Its primary role is to monitor the integrity of the neutral-to-ground connection while detecting ground faults effectively. This device measures both current and voltage within a transformer or generator's neutral-to-ground connection, as well as the continuity of the neutral-grounding resistor (NGR). By coordinating these measurements, the SE-325 identifies issues such as loose connections, corrosion, ground faults, or failures in the NGR.With one alarm or trip output contact, this monitor provides essential feedback on system status, ensuring prompt response to potential electrical hazards. The SE-325 also features a supply voltage of 120 VAC and 120 VDC, along with approvals from CSA, indicating its compliance with industry standards.

The UltraMOV 25S Series varistors are engineered for applications that demand robust surge current handling and energy absorption capabilities. These devices are suitable for AC Line Voltage applications, offering effective voltage clamping for high transient surge currents. With a compact 25mm square form factor, they are available in a radial lead package with straight leads.Manufactured with a recognized epoxy encapsulation, the varistors operate reliably at ambient temperatures up to 85°C without derating. The 25S Series supports a maximum rated DC voltage of 745V and a peak pulse current rating of 22,000A, making it ideal for high-demand environments. Additionally, the surge energy absorption capability is rated at 765J, ensuring durability against significant energy spikes. The clamp voltage is recorded at 1475V, with bi-directional clamp polarity, which enhances its application versatility.

The MLA AUTO Series transient voltage surge suppression device utilizes advanced multilayer fabrication technology to effectively mitigate various transient events, in compliance with standards such as IEC 61000-4-2. This series is particularly suitable for safeguarding integrated circuits and other electronic components on circuit boards. With a maximum rated DC voltage of 14V and a wide operating voltage range, the MLA AUTO Series accommodates energy fluctuations across power supply, control, and signal lines. Its compact 1206 (3216) surface mount package enhances design flexibility, while compatibility with modern reflow and wave soldering processes facilitates integration into existing systems. Additionally, it operates efficiently over a broader temperature range compared to traditional Zener diodes. Constructed from semiconducting ceramics, the device features a maximum clamp voltage of 32V and a typical capacitance of 1200 pF, providing reliable performance with minimal footprint. It is engineered to handle an ILMax of 100 and Itm1x of 150, ensuring robust protection in demanding applications.

The Littelfuse Industrial TMOV34S® series thermally protected varistor represents a new development in circuit protection.It consists of a 34mm square format varistor element ( MOV) with an integral thermally activated element designed to open in the event of overheating due to abnormal over-voltage, limited current conditions. Certain TMOV34S devices are offered with a "monitor" lead which may be connected to signalling circuity to indicate if the MOV has been disconnected from the circuit. TMOV34S Series devices offer quick thermal response due to the close proximity of the integrated thermal element to the MOV body. The integrated configuration also offers lower inductance than most discreet solutions resulting in improved clamping performance to fast over voltage transients. UL1449 3rd Edition approval of TMOV34S Series is currently pending related to the integrated thermal element of this series. Contact your Littelfuse product representative to discuss alternatives and for additional information.

The KLLU1200 - KLLU Series fuses are UL Listed Class L fuses that feature a time-delay functionality, making them suitable for various applications requiring reliable circuit protection. These fuses are designed to serve as a cost-effective alternative to the POWR-PRO™ KLPC series while meeting or exceeding all UL standards for Class L fuses.With an ampere rating of 1200 A and a voltage capacity of 600 VAC, these fuses can handle significant electrical loads. They also possess a voltage rating of 300 VDC and feature an interrupting rating of 200,000 A at 600 VAC, providing robust protection against overcurrent situations. The Slo-Blo/Time Lag (T)/Time Delay opening characteristic allows for the management of inrush currents without nuisance blowing, optimizing performance in various applications.

Metal Oxide Varistors (MOVs)are rated for specific AC line operating voltages, and exceeding these limits through the application of a sustained abnormal over-voltage condition could result in overheating and damage to the MOV. The Littelfuse TMOV25S™ (Thermal MOV) Series was designed to address this condition in a single integrated package. The Littelfuse TMOV25S™ Series incorporates a patented integrated thermally responsive element within the body of the device which will open-circuit the varistor in case of overheating due to abnormal over-voltage events. The TMOV25S™ Series is based on the Littelfuse UltraMOV™ 25S Series which meets the surge suppressor component recognition requirements of UL 1449 3rd edition for both cord connected and permanently connected TVSS end products. UL1449 3rd Edition approval of TMOV25S Series is currently pending related to the integrated thermal element of this series and product release is anticipated for summer or 2011. Please contact your Littelfuse product representative to discuss alternatives and for additional information.

The PSR Flush End Series, specifically the PSR030FS0063, is engineered for the protection of power semiconductor devices such as diodes, triacs, IGBTs, SCRs, and MOSFETs. These devices are commonly integrated into power conversion and conditioning systems, which include applications like variable frequency drives, inverters, UPS systems, rectifiers, and soft-starters. This series is particularly vital for equipment that incorporates sensitive power semiconductor devices, as these components cannot tolerate line surges or overcurrent conditions. The fuse provides high-speed protection, essential for safeguarding modern power conversion devices. With an ampere rating of 63 and a very fast-acting opening mechanism, the PSR030FS0063 ensures rapid interruption of current under fault conditions. The interrupting rating of 200kA at 700VAC allows it to operate effectively in various industrial settings, such as pulp and paper manufacturing, heavy-lifting equipment, processing industries, wastewater treatment facilities, and large factories. The specific design of the PSR Flush End Series aligns with the stringent demands of contemporary electrical systems, ensuring reliability and safety in critical applications.

The 1.5KE Series is engineered for safeguarding sensitive electronic components from voltage surges caused by lightning and other transient events. With a Reverse Standoff Voltage (VR) of 273V, it effectively absorbs excessive voltage, ensuring operational integrity.This series exhibits a maximum clamp voltage of 441V, providing a reliable barrier against voltage spikes. Additionally, it has a breakdown voltage range from 304V to 336V, which guarantees prompt activation during transient events.It supports a peak pulse current of 3.5A (10x1000 μs), allowing it to handle brief, high-energy transients without failure. The on-state current is rated at 1mA, and the device operates efficiently up to a maximum temperature of 175°C. Its minimal reverse leakage current of 1 μA at the standoff voltage further enhances its reliability in high-voltage applications. This component is essential for protecting circuits in various electronic devices, ensuring longevity and stable performance.

The SP3003 has ultra low capacitance rail-to rail diodes with an additional zener diode fabricated in a proprietary silicon avalanche technology to protect each I/O pin providing a high level of protection for electronic equipment that may experience destructive electrostatic discharges (ESD). These robust diodes can safely absorb repetitive ESD strikes at the maximum level specified in the IEC 61000-4-2 international standard (Level 4, 8KV contact discharge) without performance degradation. Their very low loading capacitance also makes them ideal for protecting high speed signal pins such as HDMI, DVI, USB2.0, and IEEE 1394.

The Littelfuse SMBJ series is designed to protect sensitive electronic equipment from voltage transients induced by lightning and other transient voltage events. This series offers a robust solution for safeguarding against sudden surges in power, ensuring the longevity of your electronic devices.Key features include transient voltage protection, lightning surge protection, and voltage transient suppression. These features work together to provide comprehensive protection for your equipment. The SMBJ series is ideal for a wide range of applications, from industrial settings to home environments.

The Littelfuse SMBJ Series is a specialized product designed to safeguard sensitive electronic equipment from voltage transients induced by lightning and other transient voltage events. This series of devices is engineered with precision, ensuring that your equipment remains protected against the harmful effects of sudden voltage spikes. The SMBJ40A, in particular, is a testament to this commitment to quality and reliability.

The Littelfuse SMBJ series is a specialized surge protection device designed to safeguard sensitive electronic equipment from voltage transients caused by lightning and other transient voltage events. This series is specifically engineered for applications where the risk of voltage surges is high, such as in industrial environments or data centers. Key Features: Protection against voltage transients induced by lightning and other transient voltage events Specifically designed for sensitive electronic equipment Ideal for high-risk environments like industrial settings or data centers