• Philips Sonicare ProtectiveClean Whitening Electric Toothbrush Navy Blue HX6851-56

    $165
    $64 (28%) off RRP of $229
    $64 (28%) off RRP of $229

    Philips Sonicare ProtectiveClean Whitening Electric Toothbrush Navy Blue HX6851-56

    $165
    $64 (28%) off RRP of $229
    $64 (28%) off RRP of $229
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    • Overview
    • Specifications & manuals
    • Reviews
    • Legendary service
    • Delivery, services & returns
    • Questions & answers

    Overview

    The Philips Sonicare ProtectiveClean 5100 (HX6851/56) brings next-level personalisation to your oral care, combining advanced technology with customisable modes to help you achieve visibly whiter teeth in just one week. Designed to remove stains and deliver a deep, dynamic clean, this toothbrush offers three modes — Clean, White, and Gum Care — allowing you to tailor every brushing session to your needs.

    With Philips Sonicare’s signature sonic technology, the brush delivers up to 62,000 brush strokes per minute, pulsing fluid deep between teeth to break up and sweep away plaque for a noticeably fresh, clean feel. The built-in Pressure Sensor ensures you brush safely, gently pulsing to alert you if you’re pressing too hard, protecting both your gums and dental work such as braces, crowns, or veneers.

    The BrushSync feature adds smart convenience, tracking your brush head usage and notifying you when it’s time for a replacement, so you always maintain peak performance. It also comes with a sleek travel case, making it ideal for maintaining your oral health routine wherever you go. With its long-lasting battery life, elegant design, and superior performance, the ProtectiveClean 5100 is the perfect companion for a whiter, healthier smile.
    Whitens Teeth in Just One Week

    Densely packed, stain-removing bristles effectively lift surface stains from coffee, tea, or wine, delivering visibly whiter teeth in as little as one week, giving you a brighter, more confident smile.

    Three Personalised Brushing Modes

    Choose Clean mode for everyday plaque removal, White mode for removing surface stains, or Gum Care mode with an extra minute of reduced power to gently massage and strengthen gums, offering a fully customisable brushing experience.

    Built-in Pressure Sensor

    Smart pressure detection provides gentle alerts when you brush too hard, helping to protect delicate gums and maintain the integrity of braces, fillings, crowns, and veneers, ensuring safe and effective daily cleaning.

    Advanced Sonic Technology + BrushSync

    Generates up to 62,000 brush strokes per minute, creating a dynamic fluid action that drives water between teeth, while BrushSync tracks brush head use and signals when it’s time for a replacement.

    Specifications & manuals

    key Specifications
    Brand
    Philips
    Finish Colour
    Blue
    Finish Colour Description
    Navy Blue
    Height (mm)
    237 mm
    Width (mm)
    173 mm
    Depth (mm)
    65 mm
    Model Number
    HX6851-56
    Weight (kg)
    .5 kg
    Accessories included
    1x ProtectiveClean, 2x W2 Optimal White standard, Travel case, Charger
    Notes
    Items included: Handle, Protective Clean, Brush heads 2 W2 Optimal White standard, Travel case, Charger
    warranty
    Manufacturer Warranty
    2 Years
    other Features
    Features
    • Whitens Teeth in Just One Week: High-density bristles effectively remove surface stains, delivering a visibly brighter smile in just seven days.
    • Three Personalised Brushing Modes: Offers Clean, White, and Gum Care modes, allowing you to customise each session for your specific oral care goals.
    • Built-in Pressure Sensor: Monitors brushing pressure and provides real-time alerts, helping prevent gum damage and protecting dental work.
    • Advanced Sonic Technology + BrushSync: Delivers 62,000 dynamic brush movements per minute, driving fluid deep between teeth, with smart reminders to replace worn brush heads.
    • Safe for Dental Work: Gentle yet thorough cleaning designed for use with sensitive gums, braces, crowns, and veneers.
    • Travel-Ready Design: Includes a sleek travel case, making it easy to maintain your oral care routine on the go.
    • Long Battery Life: Rechargeable battery provides up to two weeks of brushing per full charge, keeping you powered wherever you are.
    • Ergonomic, Elegant Handle: Slim, well-balanced handle ensures a comfortable grip and precise control for every brushing session.
    • Supports Gum Health: Regular use helps reduce gum inflammation, supporting healthier gums and long-term oral health.
    country of Origin
    Origin
    China

    Reviews

    Rating snapshot

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    Average customer rating

    Overall
    3.0

    Appliances Online's customer reviews are independently managed by Bazaarvoice, ensuring their accuracy and honesty. Vouchers are sometimes offered to verified buyers in exchange for their unbiased review.

    Learn more about Bazaarvoice Authentic Reviews Trust Mark
    1-2 of 2 reviews
    GramyL2025-11-28
    Awesome features
    [This review was collected as part of a promotion.] I love my sonic care! I recommend the brand to everyone as it has made my mouth and gums so healthy
    AMRadtech2025-11-25
    Defect in product.
    Very disappointed... While the toothbrush function is good, the vibration is very strong but it must be too strong. I've had the same defect in this toothbrush twice. The vibration is so strong that it loosens the internal parts. The metal pin that holds the brush head gets loose and makes a terribly loud noise and eventually stops vibrating. I've had it replaced once already and the replacement has the same issue. I hate to have to buy a new one but it is just past the 2 year warranty period. So beware when you buy this, dont write a glowing review right away.. wait to see if yours holds up for more than a year before it has to be replaced.

    Legendary service

    The Appliances Online Net Promoter Score (NPS) is based on feedback from 89,897 people, collected between August 2024 to August 2025. Learn more about the Net Promoter Score (NPS).
    Saving time and money
    Michelle, Mooroolbark, VIC
    Love to shop online from your well organised and informative site
    Lois,
    This is not as common as we would hope!
    Mike, Yanchep, WA

    Delivery, services & returns

    Appliances Online is all about legendary service. We offer free next business day delivery, free connection, free removal and free recycling, and we even offer Saturday delivery and, in some locations, a Premium Delivery option that allows you to choose your own 2-hour delivery window.

    Questions & answers

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