• VT-4B5 SP Aluminum Base Laminate

    UL Approval: E214381 Version: 23/08/2023 23/08/2023

    General Information

    • Thermal conductivity -- 4.2W/mK
    • Ceramic Filled
    • Halogen Free
    • Flammability UL94 V-0
    • MOT 130℃
    • Selective Preference Dielectric for Ultra Low Thermal Resistance


    • Matrix LED for Auto Bulb
    • High Power LED
    • Electric Power Steering

    Laminate Properties

    Item Test Method (IPC-TM-650) Unit VT-4B5 SP 40um
    Thermal Conductivity ISO 22007-2 W/m*K 4.2
    Thermal Impedance ISO 22007-2 ℃*in2/W 0.015
    Tg DSC 2.4.25 120
    DMA 145
    Td TGA ASTM D3850 380
    Thermal Stress Solder Dip @ 288℃ Minute >=5
    Hi-Pot Withstand DC V 1000
    Breakdown Voltage AC V 3000
    Dk @ 1MHz C-24/23/50 - 4.8
    Df @ 1MHz C-24/23/50 - 0.016
    Volume Resistance After Moisture MΩ-cm 5.0E+8
    E-24/125 3.0E+7
    Surface Resistance After Moisture 2.0E+7
    E-24/125 5.0E+6
    Peel Strength (1oz) As received 2.4.8 Lb/in 7
    CTI As received ASTM D3638 V 600
    Flammability As received UL94 Rating V-0
    RTI Electric UL94 130
    Mechanical UL94 130

    All test data provided are typical values but not intended to be specification values. Disclaimer: The information and data contained in this technical literature is based on data and knowledge correct at the time of publishing/printing and is believed to be accurate and is offered in good faith for the benefit of the user. The user should make his own tests to verify the suitability of this product for any application before its use. All data are typical values only and subject to change without notice.

    Storage Condition

    Storage Condition Temperature Room
    Relative Humidity /

    The RCF exceeding shelf life should be retested.

    Designation of IMS Laminate

    VT-4B5 SP Designation.png



    Item Availability
    Dielectric thickness 50µm (SP: Selected)
    Standard Size Imperial 18.11*24.02", 20.08"*24.02", 20.98"*24.02", 18.11"*48.03", 20.02"*48.03", 20.98"*48.03"
    Metric 460*610, 510*610, 533*610, 460*1220, 510*1220, 533*1220
    Copper weight 1/3oz, Hoz, 1oz, 2oz, 3oz, 4oz, 6oz
    Aluminum thickness 0.6mm, 0.8mm, 1.0mm, 1.2mm, 1.5mm, 2.0mm, 3.0mm
    Aluminum Alloy 1060, 5052, or as required

    Protective Film for Aluminum Plate

    Type Material Max Operation Temperature
    Standard PET 170℃
    High Temperature Polyimide 270℃

    Download TDS Datasheet