PRODUCT CATALOG & DESIGN GUIDE DIODE Transient Voltage Suppression Diode Devices

Transient Voltage Suppression Diodes TVS Diode Product Selection Guide table of Contents RoHS Compliant TVS Diode Overvoltage Suppression Facts TVS Diode Transient Voltage Scenarios TVS Diode Device Typical Applications TVS Diode FIT Calculation Method and TVS Transients Clamping Waveform TVS Diode Selection Checklist and TVS Diode Terms & Definitions Legal Disclaimers Series Name Package Type Reverse Standoff Voltage (VR) Peak Pulse Power Range† (PPP10/1000μs) Peak Pulse Current (IPP 8/20μs) Operating Temperature Surface Mount-Standard Application (200-5000W) Axial Leaded-Standard Application...

Transient Voltage Suppression Diodes TVS Diode Overvoltage Suppression Facts Transient Threats – What Are Transients? Voltage Transients are defined as short duration surges of electrical energy and are the result of the sudden release of energy previously stored or induced by other means, such as heavy inductive loads or lightning. In electrical or electronic circuits, this energy can be released in a predictable manner via controlled switching actions, or randomly induced into a circuit from external sources. Repeatable transients are frequently caused by the operation of motors, generators,...

Transient Voltage Suppression Diodes TVS Diode Transient Voltage Scenarios Electrostatic Discharge (ESD) Inductive Load Switching Electrostatic discharge is characterized by very fast rise times and very high peak voltages and currents. This energy is the result of an imbalance of positive and negative charges between objects. ESD that is generated by everyday activities can far surpass the vulnerability threshold of standard semiconductor technologies. Following are a few examples: • Walking across a carpet: 35kV @ RH = 20%;1.5kV @ RH = 65% Typical sources of inductive transients include: •...

Transient Voltage Suppression Diodes TVS Diode Device Typical Applications DC Supply Protection DC Supply Protection DC Supply Protection DC Load Protection DC Load Protection DC Supply Protection R R DC Load Protection Circuit Circuit DC LoadCircuit Protection Breaker DCBreaker Supply Protection Options Circuit R Breaker Options TVS Rectifier TVS TVS Network Load Load To Load DC motor Amplifier Operational Amplifier Operational Amplifier Operational Amplifier Protection C DC output Load Load TVS Elector-Magnetic Interference Limiting A.C. Supply Protection A.C. Supply Protection EMI Limiting A.C....

Transient Voltage Suppression Diodes TVS Diode Device Typical Applications (continued) Telecom DC/DC Protection Circuit Telecom DC/DC Protection LVSP Fuse Nano Fuse 461 Series TVS Diode SMCJ or AK3 Series For 48vdc Lightning Protection: TVS Diode: AK6-66CL Lightning Fuse: LVSP15-R Power fuse: TLS035L/456020 For 5vdc Lightning Protection: Fuse: 461 Series TVS:AK3-7.5CL, 5.0SMDJ Circuit Protection of 24VDC with high surge capability Circuit Protection of 24VDC with High Surge Capatbility Outside World Primary Protection: AK10-030 TVS Diode SMDJ28A TVS for PWMDiode TVS (Pulse Width Modula driver...

Transient Voltage Suppression Diodes TVS Diode Device Typical Applications (continued) LED Driver Protection RS232 interface protection with high surge requirement RS232 Interface Protection with High Surge Requirement FUSE © 2013 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 09

JEDEC JESD 85, methods for calculating failure rates in JEDEC JESD 91 A, method for developing acceleration models for electronic component failure mechanisms. Life Test FIT is calculated based on life test result. Littelfuse conducts Blocking test as following condition at any qualification or on-going reliability monitoring activity. Temperature: 150°C, Duration: 504 hours, Sample number: Note, this is minimum requirement and the duration and sample number could be increased per test purpose. Acceleration Factor Acceleration Factor or AT is calculated per JEDEC JESD 91 A, Arrhenius equation...

1. Define Circuit Operating Parameters Normal operating voltage type in DC or AC:_ Device Type Required: Uni-drectional Bi-directional Normal operating voltage in volts:_ Maximum transient current (Ipp):_ Maximum clamping voltage (Vc):_ Required peak reverse surge power rating:_ Product mounting type (package):_ Operating temperature:_ 2. Narrow TVS Diode Series for the Application Please refer to the product selection charts and data sheets within this guide, factoring these key parameters: Reverse Standoff Voltage (VR): The device VR should be equal to, or great than, the peak operating level...

Transient Voltage Suppression Diodes Legal Disclaimers Liability Littelfuse, Inc. its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, “Littelfuse”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained here or in any other disclosure relating to any product. Littelfuse disclaims any and all liability arising out of the use or application of any product described herein or of any information provided herein to the maximum extent permitted by law. The product specifications do not expand or otherwise modify Littelfuse...

Transient Voltage Suppression Diodes Surface Mount – 200W > SMF Series The SMF series is designed specifically to protect sensitive electronic equipment from voltage transients induced by lightning and other transient voltage events. SMF package is 50% smaller in footprint when compare to SMA package and deliverying low height profile (1.1mm) in the industry. Maximum Ratings and Thermal Characteristics (TA=25°C unless otherwise noted) Parameter Peak Pulse Power Dissipation at TA=25ºC by 10/1000µs (Note 1) Thermal Resistance Junction- toAmbient Thermal Resistance Junction- toLead Operating and...

Transient Voltage Suppression Diodes Surface Mount – 200W > SMF Series Electrical Characteristics (TA=25°C unless otherwise noted) Breakdown Voltage VBR (Volts) @ IT Part Number Notes: 1. VBR measured after IT applied for 300µs, IT = sequare wave pulse or equivalent. 2. Surge current waveform per 10/1000µs exponential wave and derated per Fig.2. 3. All terms and symbols are consistent with ANSI/IEEE C62.35. © 2013 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 09/1