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News Release from: Raychem Circuit Protection | Subject: VTP110 strap device
Edited by the Electronicstalk Editorial
Team on 01 May 2001
Strap-on protection for thin Li-ion
cells
The newest addition to Raychem's popular line of PolySwitch PPTC resettable strap devices offers the thinnest strap profile in the industry, with a maximum width of only 2.9mm.
The newest addition to Raychem's popular line of PolySwitch PPTC (polymeric positive temperature coefficient) resettable strap devices offers the thinnest strap profile in the industry, with a maximum width of only 2.9mm, allowing installation on 3mm thick Li-ion prismatic cells Providing both over-current and over-temperature protection, the VTP110 device is designed for the increasingly small form factors of the rechargeable Li-ion and NiMH prismatic cell packs that power many PDAs and pocket PCs
It offers increased safety by latching into a high resistance state when a short circuit or overcharge fault occurs.
Once the fault and power to the circuit are removed, the device automatically resets for normal operation.
The VTP110 strap device's narrow, low-profile form factor and axial leads allow it to be welded directly onto battery cells, saving battery pack manufacturers space in portable electronics applications.
The VTP110 device also offers enhanced, resettable thermal protection, allowing Li-ion pack designers to eliminate one-shot thermal fuses, which are subject to nuisance tripping.
With hold current ratings of 1.1A at 25C and 0.5A at 60C, the VTP110 device provides sufficient hold current for the majority of handheld applications.
The VTP110 circuit protection device measures only 25.6 x 2.9 x 0.7mm and has a maximum time-to-trip of 5s at 7A.
It has a voltage withstand capability of 16V and typical resistance of 54mW.
UL, CSA and TUV certifications are pending.
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