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Lithium Ion Battery Protectors
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Product Variants of Lithium Ion Battery Fuses and Switches

For the protection of devices utilizing rechargeable Li-ion batteries, SCHOTT offers SEFUSE® battery fuses and SEREB® thermal protection switches. These high-quality electronic protection components help mitigate dangerous circumstances that could potentially be caused by battery malfunctions.
SEFUSE® Battery Fuses

SEFUSE® Battery Fuses

SEFUSE® battery fuses are used in electronic applications with rechargeable Li-ion batteries, including battery-powered tools and vehicles. The D6S and S types protect the circuit from overcurrent and overcharging. The lineup of battery fuses includes compact designs that save space and designs that support high currents. The S type is a lead-free* fuse that helps reduce environmental impact.
SEFUSE® Battery Fuses
SEFUSE® Battery Fuses
SEFUSE® Battery Fuses
SEFUSE® Battery Fuses
  • SEFUSE® Battery Fuses
  • SEFUSE® Battery Fuses
  • SEFUSE® Battery Fuses
  • SEFUSE® Battery Fuses

YOUR ADVANTAGES

  • Suitable for high current.
  • Compatible with up to 14 cells.
  • Many variations available, with different current and package sizes.
  • Extremely thin and compact surface mount design.
  • Pb-free* (S type)
  • RoHS compliant

* SCHOTT uses no lead when producing these battery fuses and follows the RoHS Directive. However, trace amounts (<1,000 ppm) naturally occur in some materials.

Notice Regarding the Conclusion of Patent Infringement Litigation (Dec 15th, 2025)

SCHOTT Japan Corporation (hereinafter, "the Company") has reached a settlement with Dexerials Corporation regarding litigation concerning the Company's battery fuse products (SEFUSE® D6S type) and related invalidation trials filed by the Company against the patents at issue. As a result, both the litigation and the invalidation trials have been concluded.

Through this settlement, the Company will continue to strive for further quality improvement and enhanced services to ensure customers can use the Company's products with confidence.

SEREB® Thermal Battery Protection Switches

SEREB® Thermal Battery Protection Switches

SEREB® thermal protection switches are resettable mini-breakers integrated into the battery cells of portable electronic devices such as smartphones and tablet PCs. They interrupt current flow in the event of a device overheating, or when overcurrent causes self-generation of abnormal heat levels. In these situations, the rise in temperature causes the bimetal element within the protector to reverse, shunting the conductive line to the PTC ceramic. The bimetal element remains reversed until there is a sufficient voltage drop.
SEREB® Thermal Battery Protection Switches

YOUR ADVANTAGES

  • Low-profile and lightweight construction with maximum height of just 1.05 mm.
  • Various operating temperatures of 72℃, 77℃, 82℃ and 85℃.
  • Compliant with RoHS and REACH guidelines.
  • Halogen-free.

Want to know more? Let’s talk

Whether you need more information, samples, a quote, or advice for a project, we would be delighted to talk to you.

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