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

安装指南

• 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.

• 超出额定范围进行操作或不正确地使用设备都可能会导致元件损坏，并可能产生电弧和火焰。
• 这些元件都用于当发生偶然的过流或超温故障时进行保护，切勿用于故障频繁发生的场合或预期会发生超长时间的动作事件的场合。
• PPTC材料污染了一定量的矽基油后或染上某些侵蚀性溶剂后可能会对元件的性能产生不利影响。
• 如果不按照我们推荐使用的电子、热学以及机械程序来对电子部件进行处理，则元件性能可能会受到不利影响。
• 在电感量很大的电路中操作时，可能会产生超过PolySwitch自复式元件额定电压的回路电压(L di/dt)。