Product category:
Circuit Protection Devices
News Release from: Sequoia Technology | Subject: Ametherm MegaSurge
Edited by the Electronicstalk Editorial
Team on 28 June 2002
Big protection in small, economical
packages
Sequoia Sensors reckons it is bringing a new level of inrush current protection to the European marketplace, following its recent exclusive agreement with Ametherm.
Sequoia Sensors is introducing a new level of inrush current protection to the European marketplace, following its recent exclusive agreement with Ametherm - the Nevada, USA, based specialist in negative temperature coefficient (NTC) thermistors and inrush current limiters Ametherm devices provide an economical and space saving way to limit high inrush current
This article was originally published on Electronicstalk on 21 Mar 2001 at 8.00am (UK)
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The MegaSurge series measuring 32mm in diameter, 7mm thick and with a 7.8mm lead space are specially designed to withstand up to 40A of continuous current and 350J of input energy.
These devices are UL approved.
Where board space is limited and cool operation is desired the miniAMP series is available from 3mm in diameter and weighs as little as 0.06 grams.
Power supplies, motor drives and audio amplifiers are among the wide range of applications needing protection from the high inrush currents generated when high-power equipment is switched on.
For example, in a switching power supply, high instantaneous surge energy is caused by the large input filter capacitors and AC input voltage.
MegaSurge absorbs these currents by offering a high resistance at the start, which decreases in milliseconds once the energy has been absorbed and steady state current begins to flow through the thermistor.
Their negligible steady state resistance allows high levels of current to flow with a minimal loss of power through the circuit.
The standard MegaSurge range caters for steady-state currents from 2A upwards and absorbs 110 to 350J of inrush energy.
The newly established Sequoia Sensors division has an exclusive European partnership to provide sales and technical support for the full Ametherm product line, including new MegaSurge inrush current limiters.
All devices are backed by Sequoia's extensive technical support, applications engineering, and design consultancy services, together with advanced stocking and distribution facilities across Europe.
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