Note: Contact your local Tyco Electronics Circuit Protection representative for dimensions and availability.

安裝指南

• Polymeric positive temperature coefficient (PPTC) devices operate by thermal expansion of the conductive polymer. If devices are placed under pressure or installed in spaces that would prevent thermal expansion, they may not properly protect against fault conditions. Designs must be selected in such a manner that adequate space is maintained over the life of the product.
  Twisting, bending, or placing the PPTC device in tension will decrease the ability of the device to protect against electrical faults. No residual force should remain on device after installation. Mechanical damage to PPTC chip may affect device performance and should be avoided.
• Chemical contamination of PPTC devices should be avoided. Certain greases, solvents, hydraulic fluids, fuels, industrial cleaning agents, volatile components of adhesives, silicones, and electrolytes can have an adverse effect on device performance.
• PPTC strap devices are designed to be resistance welded to battery cells or to pack interconnect straps, yet some precautions must be taken when doing so. In order for the PPTC device to exhibit its specified performance, weld placement should be a minimum of 2mm from the edge of the PPTC chip, weld splatter must not touch the PPTC chip, and welding conditions must not heat the PPTC device above its maximum operating temperature.
• PPTC strap devices are not designed for applications where reflow onto flex circuits or rigid circuit boards is required.
• The polyester tape on PolySwitch strap devices is intended for marking and identification purposes only, not for electrical insulation.

• 超出額定範圍進行操作或不正確地使用設備都可能會導致元件損壞，並可能產生電弧和火焰。
• 這些元件都用於當發生偶然的過流或超溫故障時進行保護，切勿用於故障頻繁發生的場合或預期會發生超長時間的動作事件的場合。
• PPTC材料污染了一定量的矽基油後或染上某些侵蝕性溶劑後可能會對元件的性能產生不利影響。
• 如果不按照我們推薦使用的電子、熱學以及機械程序來對電子部件進行處理，則元件性能可能會受到不利影響。
• 在電感量很大的電路中操作時，可能會產生超過PolySwitc h自復式元件額定電壓的迴路電壓(L di/dt)。