Circuit & System Protection


Latest Articles

NH dual indication fuses
13 July 2005
Bussmann's dual-indication 500 V a.c. Class gG NH fuse link breaks new ground by incorporating a simple, dual indication system, easily visible from both top and centre of the fuse link, whether it is ...

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Dynamic power factor correction offers benefits
13 July 2005, Electrocomp, Information Security
Conventional power factor correction (PFC) systems consist of a power factor controller and power capacitors. They are connected to the power line via electromechanical capacitor switching contactors. ...

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Lead-free surface mount polymer PTCs
13 July 2005, Perimeter Security, Alarms & Intruder Detection, Products & Solutions
Bourns Multifuse Polymer PTC lead (Pb)-free surface mount components' (the MF-SMDF, MF-MSMF, and MFNSMF) standard metal termination finish is electroless nickel immersion gold (ENIG).    This finish ...

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Surge protection device with RFI suppression filter
13 July 2005, Phoenix Contact
Phoenix Contact's surge protection device, the SFP 1-20/120AC, combining surge protection with a protection circuit against high frequency interference. The robust housing is DIN-rail mountable and can ...

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Compact fuse terminals
13 July 2005, Phoenix Contact
The compact UT 4 HESI fuse terminal (5 x 20) from Phoenix Contact with 4 mm² screw connections features a double-bridge shaft, which is designed to fit all UT terminal blocks in line. This enables quick ...

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Gaskets for easing enclosure door EMI problems
15 June 2005
For combatting electromagnetic interference (EMI) problems where enclosure doors, cabinets and boxes are concerned, EMI shielding and thermal interface solutions provider, Laird Technologies, can supply ...

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Overvoltage protectors for automotive applications
15 June 2005, CST Electronics, Electrocomp
The MAX6397/8/9 are three low-power, integrated automotive overvoltage protectors from Maxim, capable of handling voltages up to 72 V. The devices are designed to provide the necessary protection and ...

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Digital isolation/RS485 technology
1 June 2005
Typically, RS485 technology is used to connect multiple systems and is often run over very long cable distances. Isolation between the bus and each system connected is critical. Digital isolation provides ...

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NTC line-up keeps growing
1 June 2005
NTCs (negative temperature coefficient thermistor chips) have been in the Murata catalogue longer than in most companies because Murata invented them. Today, the choice is still growing as the technology ...

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Choke series for interference suppression
1 June 2005, Electrocomp
Epcos has added the B82732F and B82733F series to its range of current-compensated chokes. The new series features one of the best inductance/rated current ratios worldwide. High leakage inductance makes ...

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Fuseblock cover saves assembly and service time
6 April 2005, Retron
Schurter offers its new 'easy-grab fuseblock cover', the OGN series, which it claims saves time during assembly as well as in test and service repair. The all-in-one fuseblock solution is available ...

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Compact safety relays with reinforced insulation
6 April 2005, Phoenix Contact
The PSR safety relay family from Phoenix Contact provides high standards for monitoring emergency cut-out and safety door power circuits and two-hand controls. All connections are pluggable and coded, ...

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Hybrid ferrite PCB shielded enclosure
23 March 2005
A new hybrid printed circuit board shield from FerriShield integrates an externally mounted ferrite saddle bead, thermal transfer pad and internal extra-wideband RF absorber membrane with a high-performance ...

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Appliance inlet module for industrial and medical applications
23 March 2005, Retron
Schurter's KFA snap-in power module, offers an optimal cost/performance ratio in a variety of applications that include medical and industrial. The module combines an appliance inlet type C14 according ...

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Gas discharge tubes cope with 25 kA
23 March 2005, Electrocomp
Gas discharge tubes (GDTs) are used to protect personnel and sensitive equipment from hazardous transient voltages. Bourns' GDTs are used in primary and secondary applications and can withstand multiple ...

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EMI filter arrays with ESD protection in thin packages
23 March 2005
ON Semiconductor offers four new highly-integrated EMI filter arrays with ESD protection in Thin DFN packages. Specifically designed for high-speed data interfaces in mobile phones, these 4-channel, 6-channel ...

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Mechanical design tips for EMI shielding
23 March 2005, Sivan Electronic Supplies
Nowadays every company is involved with CE/EMI demands. The use of electronics increases as well as the frequencies. Therefore radiation and immunity has to be taken into account in an early stage during ...

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Resettable fuses for automotive protection
23 March 2005, Electrocomp
Bourns' MF-SMHT Series of high temperature polymer PTC resettable fuses is specifically engineered for automotive applications. Its characteristics make it ideal for under the hood and wheel arch applications. ...

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EMI filters for 48 V power input
23 March 2005, Electronic Industry Supplies
The 48 V d.c. power input in telecommunications applications is the main target of Spectrum's newly developed series of EMI-filters. Complementing the company's existing range of standard AC and DC filters, ...

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Shielded enclosures with RF absorbers for electronics
9 March 2005
FerriShield offers PCB shielded enclosures that have RF absorbing material. The company has available three standard size EMC PCB enclosures with seven frequency-specific absorber formulations as well ...

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