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www.us-tech.com
May/June, 2012
TE Circuit Protection MHP Now Offers Smart Activation Feature
Menlo Park, CA — TE Circuit Protection, a business unit of TE Connectivity, has introduced a new Metal Hybrid PPTC (MHP) device offering Smart Activation (SA) func- tionality. The MHP-SA device pro- vides a resettable, cost-effective and space-saving alternative to typical methods of protecting high-power lithium battery and module applica- tions. These include cordless power tools, e-scooters and light electric vehicles (LEVs) and standby power and energy storage systems (ESSs). The new MHP-SA device helps
provide overcharge protection in large multi-cell battery packs and modules in which circuit protection devices interface with electronics as part of a sophisticated battery man- agement system. The MHP-SA de - vice’s Smart Activation design fea- ture accomplishes this through a third terminal signal line that enables external activation. In a typical scenario, an IC
monitors the battery system’s tem- perature, current and voltage and, if an abnormality is detected, it switch- es on a FET and activates the heater
element (PPTC) of the MHP-SA device to heat the bimetal. The bimetal contacts then open and cut contact to the main line. The first in a series of planned devices, the new MHP-SA50-400-M5 device has a 50A/400VDC maximum rating and its hold current is 50A on the main line. The device can be activated elec- tronically with as little as 3A on the signal line. MHP Technology utilizes a hybrid circuit protection approach, combining a bimetal protector in par- allel with a polymeric positive tem- perature coefficient (PPTC) device.
Resettable MHP technology
offers excellent arc suppression char- acteristics and also offers a smaller size and thinner form factor compared to larger DC fuses or other protection devices. The MHP-SA device helps save design costs due to its ability to
Smart activation circuit.
employ a low-power switch to open the main line, enabling lower-cost FETs to be installed. And because the MHP-SA device is resettable there is no need to overrate for inrush cur- rents. In some cases, designers can replace larger, higher-cost DC fuses
with an MHP-SA device. Contact: TE Connectivity, P.O.
Box 3608, MS 38-41, Harrisburg, PA 17105-3608 % 800-522-6752 or 215-657-6202 E-mail:
newproducts@tycoelectronics.com Web:
www.te.com
See at EDS Booth #3-110 Tuesday.
Lista: CNC Tool Storage Cabinets
Holliston, MA — Lista International Corporation is showing several of its storage solutions including CNC Tool Storage Cabinets. Available in a vari- ety of sizes, heights and drawer con- figurations, the storage cabinets are equipped with tool holder frames and tool holders to accommodate a variety of standard-sized CNC tool holders. The modular design of the cabi-
nets allows the drawers and roll-out trays, which each have a 440 lb. (200kg) load capacity, to be easily reconfigured for changing needs. Lockable doors on the cabinets pro- tect valuable tools. The basic components are Lista
Tool Holders, a technically perfect solution to vertical storage of pre-set tools. Each tool holder is molded from ABS high impact and oil-resistant plastic, so it conforms to the shank of the tool holder, protecting it from
damage. Contact: Lista International
Corporation, 106 Lowland Street, Holliston, MA 01746 % 800-722-3020 fax: 508-626-0353 E-mail:
sales@listaintl.com Web:
www.listaintl.com
See at AATE Booth #1030. See us at SMT Hybrid Pkg. Booth 6-101B
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