LITTELFUSE Manuals

The SP720 is an array of SCR/Diode bipolar structures for ESD and over-voltage protection to sensitive input circuits. The SP720 has 2 protection SCR/Diode device structures per input. A total of 14 available inputs can be used to protect up to 14 external signal or bus lines. Over-voltage protection is from the IN (pins 1-7 and 9-15) to V+ or V-. The SCR structures are designed for fast triggering at a threshold of one +VBE diode threshold above V+ (Pin 16) or a -VBE diode threshold below V- (Pin 8). From an IN input, a clamp to V+ is activated if a tran- sient pulse causes the input to be increased to a voltage level greater than one VBE above V+. A similar clamp to V- is activated if a negative pulse, one VBE less than V-, is applied to an IN input. Standard ESD Human Body Model (HBM) Capability is:

This document describes the features and characteristics of Littelfuse's SP725 series SCR diode array products, which are used for ESD and transient overvoltage protection. The product has bidirectional protection capability for both high voltage and low voltage, and can be applied in various electronic design fields.

The SP721 is an array of SCR/Diode bipolar structures for ESD and over-voltage protection to sensitive input circuits. The SP721 has 2 protection SCR/Diode device structures per input. There are a total of 6 available inputs that can be used to protect up to 6 external signal or bus lines. Over-voltage protection is from the IN (Pins 1-3 and Pins 5-7) to V+ or V-. The SCR structures are designed for fast triggering at a threshold of one +VBE diode threshold above V+ (Pin 8) or a -VBE diode threshold below V- (Pin 4). From an IN input, a clamp to V+ is activated if a transient pulse causes the input to be increased to a voltage level greater than one VBE above V+. A similar clamp to V- is activated if a negative pulse, one VBE less than V-, is applied to an IN input. Standard ESD Human Body Model (HBM) Capability is:

2AG Fast-Acting Fuse 224/225 Series provides the same performance characteristics as their 3AG counterpart, while occupying one-third the space.

3AB Slo-Blo® Fuse 325/326 Series is a ceramic-cased fuse produced by Littlefuse. It has higher interrupting ratings and voltage ratings and is ideal for applications where high current loads are expected.

The FLQ series of fuses have a rated voltage of 500 volts and a rated current of 1/10 to 30 amps. They have a 135% current rating and a maximum opening time of 1 hour, 32/10-30 amps have a minimum opening time of 12 seconds, 200% current rating and a minimum opening time of 5 seconds. The fuse is listed by Underwriters Laboratories and certified by CSA. It has a rated interrupting current of 10,000 amps and a rated voltage of 500 volts.

This document describes the features and characteristics of NANO2® surface mount fuses, fuse blocks, and clips.

The Littelfuse POWR-Switch is a simple and economical solution for applications that require selective coordination and shunt trip capabilities. Common applications include elevator circuits, data processing rooms, and building emergency systems.

The Littelfuse 482 Series Alarm Indicating Fuseholder is designed for use with the Littelfuse 481 Alarm Fuse. It is designed to accept other manufacturer’s replacement fuses as well.

This document describes the 1.5KE6.8 - 1.5KE440CA series of 18 1500 watt axial transient voltage suppressors, ideal for protecting I/O interfaces, Vcc bus, and other integrated circuits used in telecom, computer, datacom, and industrial electronics against voltage transients induced by inductive load switching and lightning.

The L17T Series Telecommunications Power Fuses are specifically designed for short circuit protection of Telecommunications circuits. The L17T Series provides reliable protection of sensitive DC power distribution systems. Constructed with low I2t and extremely current limiting characteristics, the L17T Series fuses provide reliable protection of sensitive DC power distribution systems. This series is rated 170 VDC.

This document introduces the features of Littelfuse CG5 and SL0902A series, including high surge ratings, low insertion loss, RoHS compliance, etc.

This document introduces the features and characteristics of the SL1002A series of Littelfuse. The series products have ultra-low insertion loss, surface mountability, 5kA surge capacity, and can be used to meet Telcordia GR1089 and other standards.

The SL1122A series Hybrid 2 Electrode Gas Discharge Tube (GDT) features excellent response to fast rising transients, flat response up to 10kV/μs, and 10kA surge capability tested with 8/20μs pulse as defined by IEC 61000-4-5. It is suitable for MDF protection, ADSL equipment, XDSL equipment, alarm panels, and general telecom equipment.