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

    Philips Sonicare ProtectiveClean Whitening Electric Toothbrush Navy Blue HX6851-56

    4.5 From 870 reviews
    $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
    Add to Wishlist
    4 payments of $41.25 with
    Own it from $10 per week with Zip Pay
    • 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
    Model Number
    HX6851-56
    Height (mm)
    237 mm
    Width (mm)
    173 mm
    Depth (mm)
    65 mm
    Weight (kg)
    .5 kg
    Finish Colour
    Blue
    Finish Colour Description
    Navy Blue
    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

    5
    634
    4
    134
    3
    45
    2
    22
    1
    35

    Average customer rating

    Overall
    4.5

    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.

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    What customers say
    Generated by BazaarVoice HarmonyAI using customers reviews

    The Philips Sonicare ProtectiveClean 5100 Sonic electric toothbrush provides a deep, thorough cleaning for the teeth and gums. Many users reported their teeth felt cleaner and smoother, with some noticing whiter teeth and improved gum health. The toothbrush offers useful features like different cleaning modes, a pressure sensor, and a timer. While some users experienced durability issues or found it noisy, the majority were very satisfied with its cleaning performance and user-friendly features.

    1-3 of 870 reviews
    Mabel112026-02-21
    [This review was collected as part of a promotion.] I have nothing to compare this toothbrush to, since it is my first electronic one. It tickles my mouth when I brush the inside of my teeth. The timed sounds helps me brush longer. I must mention this, although it has nothing to do with the quality of the product. I wrote to you when I received it and asked a question about the brushes that came with it, but you didn't have the courtesy to respond.
    MissMolliesMom2026-02-19
    Very nice toothbrush
    [This review was collected as part of a promotion.] The Protective Clean 5100 is great! We really like the little beep you hear every 30 seconds to remind you to switch to different teeth. The slim style is easy to hold and the battery lasts at least two weeks. It's nice having the option of the 3 different settings, but the standard one should be fine for most people. All in all, a great toothbrush. I wish it were easier to figure out how to sign up for the brush auto-refills; I still haven't found how to do that.
    Gmk!2026-02-12
    The 3 different cleaning options
    [This review was collected as part of a promotion.] I feel like this toothbrush cleans my teeth well and it’s easy on my gums

    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).
    I cannot fault the service
    Carol, Seaford, Vic
    So polite and efficient
    Jennifer, Frankston South, VIC
    Driver phoned first as requested
    Diana,

    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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    We're here to help 24/7 - for an immediate answer to your question, chat with one of our Live Chat agents below or call us on 1300 000 500 .

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