Bourns' TISP8250 is a telecommunications protector, designed for use in a variety of applications including: telephone handset/base station and SLIC protection in access or telecommunication centre equipment.
This unidirectional protector is intended for use with diode bridge-fed circuits, like those commonly employed in analog telephone handsets and DECT base stations, or in protection schemes where reverse biased conditions will not occur. The TISP8250 can be used as a fixed overvoltage protector having a 'natural' maximum breakover voltage of 340 V - alternatively, when used with an external reference such as a zener diode, it can be made to operate as a gate triggered protector.
The device can also be used as a current-triggered protector. Such an application would use the TISP8250 as a conventional crowbar across the circuit to be protected. Triggering would be caused by a sense resistor in series with the circuit to be protected connected to the TISP8250 gate and cathode terminals. In this arrangement, the initial fault current flowing into the circuit under protection (CUP) will cause sufficient voltage drop across the sense resistor to trigger the protector. The sense resistor value must allow for all normal CUP operating conditions, and yet cause the TISP8250 to trigger under fault conditions. When triggered, the TISP8250 shunts the main fault current around the input circuit diverting the fault current away from the CUP which must be capable of handling the initial fault condition prior to protector triggering.
For fixed voltage operation (no external trigger) the TISP8250 behaves like a conventional fixed-voltage protector. The breakover current (I(BO) 200 mA maximum @ 25°C) and holding current values make the TISP8250 suitable for the protection of conventional POTS line equipment, when operated with associated fault current limiting devices, such as Bourns Multifuse products and Bourns Line Protection Modules.
Clearing the Static: Conductive foot, heel and shoe grounders Actum Electronics
Circuit & System Protection
Conductive foot, heel and shoe grounders are used in electrostatic discharge protected areas to provide a path to ground for static electricity.
Read more...LED driver for industrial power supply indication Altron Arrow
Editor's Choice Circuit & System Protection
A simple and small solution for driving an LED to provide visual feedback in the presence/absence of a system’s power using a chip not originally designed for this purpose.
Read more...HiRel components from Kyocera AVX Electrocomp
Passive Components
Kyocera AVX Corporation is a leading supplier of advanced components and interconnect solutions, offering a broad selection of passive components and connectors.
Read more...Clearing the Static: Cleaning in an ESD-protected area Actum Electronics
Circuit & System Protection
Cleaning in a protected electrostatic discharge area is a critical task to maintain the integrity of sensitive electronic components and prevent damage caused by static electricity.
Read more...Ensuring safety with earth leakage protection NewElec Pretoria
Circuit & System Protection
Earth leakage protection helps mitigate the risks of electric shocks, fires, and equipment damage by swiftly identifying faults and disconnecting the power supply, thus safeguarding both human lives and machinery.
Read more...Suppressing EMI with filters Vepac Electronics
Circuit & System Protection
EMI/RFI filters play an important role in reducing the high-frequency noise that is generated by various electrical and electronic devices.
Read more...Patch attenuates like a shielding cabinet Würth Elektronik eiSos
Circuit & System Protection
Würth Elektronik has launched its hybrid WE-EMIP EMI absorber sheet, a convenient solution for reducing electromagnetic interference by up to 40 dB.
Read more...Clearing the Static: Ionisation equipment Actum Electronics
Circuit & System Protection
Electrostatic discharge (ESD) ionisation equipment is designed to neutralise static charges that accumulate on surfaces in environments where ESD-sensitive components or materials are handled. These ...
printer friendly version