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SIDACtor® Protection Thyristors Littelfuse* Expertise Applied | Answers Delivered SIDACtor Product Description SIDACtor Family Application Selector Table Product Packages Construction and Operation Electrical Parameters Selection Criteria Overvoltage Protection Comparison Custom Part Number Capabilities Quality and Reliability Assurance Global Commitment to Green and Environmental Compliance Telecommunications Protection PCB Layout Considerations for an Ethernet Application or Other High Speed Circuits PCB Placement Guidelines for QFN (Quad Flatpak No-Lead Package) Lead-Free Soldering Recommendations...

Expertise Applied | Answers Delivered SIDACtor® Protection Thyristors Standoff Series Name Package Type Type (working) Voltage (Vdrm) © 2017 Littelfuse, Inc. Specifications, desSripcions a od illustrative material in this literatnre cre as accurate as known at the time of publication, but are subjectto change without notice. Visit www.littelfuse.com for more information.

RoHS Compliant SIDACtor ® Protection Thyristors Series Name Package Type Standoff (working) Voltage (VDRM) Peak Pulse Rating: 2x10µs High Exposure Surge Protection: High Surge Current Series Primary Protection Series Primary Protection Balanced Series © 2017 Littelfuse, Inc. Littelfuse, Specifications are subject toand illustrative material in this literature are Specifications, descriptions change without notice. as accurate as known at the time of publication, but are subject to change Revised: 02/23/17 without notice. Visit www.littelfuse.com for more information.

SIDACtor ® Protection Thyristors SIDACtor Product Description SIDACtor components are solid state crowbar devices designed to protect telecom equipment during hazardous transient conditions. Capitalizing on the latest in thyristor advancements, Littelfuse makes SIDACtor devices with a patented ion implant technology. This technology ensures effective protection within nanoseconds, up to 5000 A surge current ratings, and simple solutions for regulatory requirements such as GR 1089, TIA-968-A (formerly known as FCC Part 68), ITU-T K.20, ITU-T K.21, and UL 60950-1. Operation In the standby mode,...

SIDACtor® Protection Thyristors Littelfuse* Expertise Applied | Answers Delivered SIDACtor Product Description (continued)Broadband Optimized™ Protection The Broadband Optimized™ family of products is focused on addressing the performance and regulatory requirements of broadband equipment. The Broadband Optimized family, with its wide range of solutions provides applications with the options needed to address the unique protection needs of DSL equipment (up to VDSL) as well as Ethernet (up to 1000baseT). Optimization is accomplished using proprietary and patented approaches that minimize the...

SIDACtor® Protection Thyristors Expertise Applied | Answers Delivered © 2017 Littelfuse, Inc. Specifications are subject to change wit

Expertise Applied | Answers Delivered Product Packages © 2017 Littelfuse, Inc. Specifications are subject to change without

SIDACtor ® Protection Thyristors Construction and Operation SIDACtor devices are thyristor devices used to protect sensitive circuits from electrical disturbances caused by lightning-induced surges, inductive-coupled spikes, and AC power fault conditions. The unique structure and characteristics of the thyristor are used to create an overvoltage protection device with precise and repeatable turn-on characteristics with low voltage overshoot and high surge current capabilities. Physics The device is a semiconductor device characterized as having four layers of alternating conductivity: PNPN (Figure...

Expertise Applied | Answers Delivered Electrical Parameters SIDACtor electrical parameters are based on the following definition of conditions • On state (also referred to as the crowbar condition) is the low impedance condition reached during full conduction and simulates a short circuit. • Off state (also referred to as the blocking condition) is the high impedance condition prior to beginning conduction and simulates an open circuit. Please refer to Figure 1.3 above related to many of the following terms: Co di/dt dv/dt IS IDRM IH IPP IT ITSM VS V DRM VF VT Off-state Capacitance—capacitance...

Llttelfuse* Expertise Applied | Answers Delivered When selecting a SIDACtor® device, use the following criteria: The VDRM of the SIDACtor® device must be greater than the maximum operating voltage of the circuit that the SIDACtor® device is protecting. Example 1: For a POTS (Plain Old Telephone Service) application, convert the maximum operating Ring voltage (150 VRMS) to a peak voltage, and add the maximum DC bias of the central office battery: For longitudinal surges (Tip-Ground, Ring-Ground), RTOTAL is calculated for both Tip and Ring: RSOURCE _ VPK/IPK R = R + R TOTAL RING SOURCE For metallic...

Expertise Applied | Answers Delivered Overvoltage Protection Comparison The four most commonly used technologies for overvoltage protection are as follows: • SIDACtoi® devices • Gas Discharge Tubes (GDTs) • Metal Oxide Varistors (MOVs) • TVS diodes All four technologies are connected in parallel with the circuit being protected, and all exhibit a high off-state impedance when biased with a voltage less than their respective blocking voltages. A SIDACtoi® device is a PNPN device that can be thought of as a thyristor device without a gate. Upon exceeding its peak off-state voltage (VDRM), a SIDACtoi®...

SIDACtor ® Protection Thyristors Overvoltage Protection Comparison (continued) TVS Diodes Transient Voltage Suppressor (TVS) diodes are clamping voltage suppressors that are constructed with back-toback PN junctions. During conduction, TVS diodes create a low impedance path by varying their resistance as voltage is applied across their terminals. Once the voltage is removed, the diode will turn off and return to its high offstate impedance. Advantages Because TVS diodes are solid state devices, they do not fatigue nor do their electrical parameters change as long as they are operated within their...