Mlv Design Guide Page 10 Application Examples

CASE 3 - INDUSTRIAL - SWITCHING INDUCTIVE LOADING PROTECTION NOTES In an industrial control environment, an electric motor or inductive loading can generate high voltage surges during inductive switching from the energy stored in the winding coil in the motor or relays. Inductive Switching: 8x20s model by IEC61000-4-5. Suitable solutions include the MLA and MLE devices. CASE 4 - WHITE GOODS - DISPLAY USER INTERFACE PROTECTION NOTES ESD Human body model up to 8kV can be harmful to ECU of home appliance through the user interfaces. MLA, MHS, and MLE Series devices can help shunt ESD away from sensitive circuitry in appliance control interfaces. Key Parameters Application Condition Requirement for MLV Continuous Voltage Rating 12VDC Varistor voltage higher than 14VDC Device size Customer may need compact design, SMD PCB mounting 0603 and up to 1210 size available Energy and Peak Current IEC 61000-4-5 requirement, Waveform as 8x20s Higher surge rating MLV needed up to Ipeak at 150A Clamping Voltage To meet IC damage level. Application testing may be needed Suggested Series Datasheet Link MLV Datasheet Key Parameters Application Condition Requirement for MLV Continuous Voltage Rating Typical value at 5VDC Varistor voltage higher than 6VDC Device size Customer may need compact design, SMD PCB mounting 0402 or 0603 typically used Energy and Peak Current IEC 61000-4-2 requirement at 8kV contact discharge All Littelfuse MLVs can meet the 8kV contact discharge Clamping Voltage To meet IC damage level. Application testing may be needed Suggested Series Datasheet Link MHS, MLA, MLE Datasheet Note: This example is only for an 8x20s inductive surge threat; please refer to other examples for other types of surges. Note: This example is only for ESD threats; please refer to other example for other types of surges. Surface Mount Multilayer Varistors (MLVs) Design Guide 2016 Littelfuse Multilayer Varistors (MLVs) Design Guide www.littelfuse.com Application Examples (continued) 10

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