Auto re-set over-current protection resistors
29 November 2006
Circuit & System Protection
Murata's new thermistor offers an internal resistance of only 0,20 Ω; allowing non-operating current flows up to 500 mA at 60°C in an 0805 format (PRG210R2).
The PRG18/21 family of posistors (positive temperature coefficient thermistors) provides over-current protection across a broad range of operating and non-operating current levels. They exhibit a rapid increase in resistance at their operating currents, or if subjected to external over-heating.
Current ratings up to 25 mA are in the 0603 format (PRG18), above that they are in an 0805 package (PRG21).
Key features are: very sharp resistance/temperature characteristics; non-operating currents from 7 to 500 mA; operating-currents from 25 mA to 2000 mA; self-resetting. Applications are for over-temperature protection, over-current protection, and temperature sensing.
Further reading:
Clearing the Static: Three steps for a dry ESD packaging system
Actum Electronics
Circuit & System Protection
For optimal storage, it’s essential to complete the dry-packaging system by adding Desiccant Packs and Humidity Indicator Cards.
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
...
Read more...
Motor and feeder protection for LV and MV environments
NewElec Pretoria
Circuit & System Protection
This relay from NewElec is a micro-controller-based precision instrument with ANSI protection elements, advanced control features, and switchgear controller logic integrating motor and feeder control functions.
Read more...
Clearing the Static: How to protect PCBs from electrostatic discharge and moisture
Actum Electronics
Circuit & System Protection
Printed circuit boards (PCBs) are essential components in most electronic devices. They are sensitive to environmental factors like electrostatic discharge (ESD) and moisture, which can cause significant
...
Read more...
Clearing the Static: ESD chairs: Essential tools in controlled protected areas
Actum Electronics
Circuit & System Protection
Static poses a significant risk in various industries, particularly those involving sensitive electronic components and equipment. To mitigate these risks, electrostatic discharge (ESD) chairs play
...
Read more...
Clearing the Static: ESD dissipative floor mats
Actum Electronics
Circuit & System Protection
Dissipative floor mats are specialised mats designed to protect sensitive electronic equipment and components from electrostatic discharge (ESD), by quickly drawing the static electricity off workers before they touch such items.
Read more...
Clearing the Static: ESD transportation and storage
Actum Electronics
Circuit & System Protection
CORSTAT and CORTRONIC storage boxes are excellent choices for transporting ESD-sensitive components like PCBs, as they feature a soft, dissipative foam lining for cushioning and static removal.
Read more...