SRBP Electrical Insulation

ASG are proud to offer a wide selection of sealing and gasketing materials, sourced from a broad network of suppliers, some of which are needed for specialist applications. One such range of products on offer from our vast catalogue are various types of electrical insulating materials with one type being Synthetic Resin Bonded Paper Electrical Insulation, sometimes also called SRBP Paper, SRBP Board or Phenolic Paper Laminate.

SRBP is usually manufactured in sheet form usually at 1220mm x 1220mm and in a range of thicknesses from 0.5mm to 20mm. Onsite conversion facilities consist of various presses, slitters, bandsaws an oscillating knife, allowing us to convert sheets of material into finished parts including pads, washers, gaskets or strips - all supplied plain or laminated with a choice of our many self-adhesives or foils.

SRBF Electrical Insulation

Material Enquiry

For information on SRBP Electrical Insulation please complete the following quick enquiry or call us on +44(0)1384 252555.






    Specification & Key Characteristics

    • Colour: Brown

      Sheet Size: 1220mm x 1220mm 

      Thicknesses available:  0.5mm to 20mm

      Temperature: Up to +105°C continuous

      Standards: BS EN60893, standard 3-4 PFCP201

      BS EN60893, standard 3-4 PFCP203

      BS EN 60893 Standard: 3-4-PFCP206

    Full technical data can be supplied upon request,
    or downloaded from our online portal.

    Material Specification Sheet

    Help and guidance

    If you would like to speak to a representative to discuss your specific application or requirements please call our sales office direct on 01384 469100, alternatively you can send an E-mail. Simply click on the link and forward us your details along with your question and we will contact you immediately.

    Samples - Technical SRBP Electrical Insulation

    Samples can be submitted for testing upon request.

    Call now for sample requests or further help.

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    What is SRBP Electrical Insulation?

    SRBP is a brown coloured composite material made of stacked layers of paper which is impregnated with a plasticized phenol-formaldehyde resin and bonded under pressure and high temperature, designed for it’s electrical insulation properties.

    Why use SRBP Electrical Insulation?

    Although paper types of insulating material don’t usually offer the mechanical characteristic or strength of those made using fabric, they offer superior electrical insulation properties, making them better suited to medium or high voltage applications, even in applications where there is exposure to humidity and oil.

    Because of the rigidity of SRBP, we can convert the sheets using the same processes used for plastics such as routing, drilling, milling and sawing, in order to produce parts such as gaskets, strips, pads and washers.

    The Benefits of using SRBP Electrical Insulation

    • Excellent electrical properties even when submerged in oil.
    • Easy to machine
    • Low moisture absorption even in humid conditions
    • Operating Temperature of 105°C continuous (+120°C intermittent)
    • High thermal resistance.

    Grades of SRBP Electrical Insulation

    Low Voltage

    • Meets BS EN60893, standard 3-4 PFCP201
    • Temperature: Up to +100°C continuous 
    • More economical grade
    • Used in Low voltage applications

    Medium Voltage 

    • Meets BS EN60893, standard 3-4 PFCP203
    • Temperature: Up to +105°C continuous 
    • Better oil absorption than the high voltage grade
    • Low water absorption
    • Used in Medium voltage applications

    High Voltage

    • Meets BS EN 60893 Standard: 3-4-PFCP206
    • Temperature: Up to +105°C continuous
    • Good electrical properties both in air and oil.
    • Low moisture absorption. 
    • High thermal resistance
    • Used in High voltage application

    Advantages of using SRBP Electrical Insulation

    Using SRBP offers a number of advantages, it is manufactured in a wide range of thicknesses and is available in 3 grades for use with varying levels of electrical voltage.

    As well as the excellent electrical insulation properties, SRBP offers a good mechanical strength, low moisture absorption and is easy to cut and form into complex shapes using a range of techniques including routing, drilling, milling and sawing to create parts which can be found utilised in electrical components, electrical switchgear, lighting, transformers and within many engineering applications.

    Have a Question about SRBP Electrical Insulation?

    Please contact us using the form below or by calling us on +44(0)1384 252555.