|
|
Varistors with integrated thermal fuse
2 May 2012, Circuit & System Protection
TDK-EPC has released a new series of EPCOS ThermoFuse varistors (ETFV) that are protected from overload and thus prevent fires. The ETFV series consists of a disk varistor of the AdvanceD series connected in series with a thermally coupled fuse and integrated in a package.
The thermo-fuse encapsulated in a special plastic disconnects an overheated varistor from the power circuit and thus prevents flames and smoke from developing. This increases the reliability of the equipment to be protected. Thanks to their thermal resistance and flame-retarding design, ThermoFuse varistors satisfy the specifications of UL 94 V-0. They are also qualified to UL 1449 3rd Edition, UL 60691 and IEC 6 0950-1 Annex Q.
In addition to the two terminal wires for the varistor, the EPCOS ETFV series has a third terminal that may be used to send warning signals – for example, to an LED to indicate that the fuse has been activated. The product range comprises disks with diameters of 14, 20 or 25 mm including the package.
The devices are designed to absorb maximum surge currents with an 8/20 μs pulse of between 6 and 20 kA at rated voltages of between 130 and 420 VRMS. They have a surge current capability of 20 kA and a maximum energy absorption capacity of 700 J for 2 ms. Applications include household appliances, power supplies, inverters for solar installations, and drives. They are also used for the general protection of electrical wiring and installations. |
|
|
|
| Share: |
 |
Via email client |
 |
 |
 |
 |
print |
|
|
|
|
|
Further reading:
- EMI compliance testing vs. pre-compliance testing
25 September 2019, Concilium Technologies, Circuit & System Protection
Electromagnetic interference (EMI) is caused by unintentional emissions from electronic equipment. Compared to natural sources of EMI, such as lightning and solar storms, engineers are more concerned ...
- Die-cast enclosures in extended lengths
25 September 2019, Electrocomp, Enclosures, Racks, Cabinets & Panel Products
The 1590 die-cast enclosures family from Hammond Manufacturing consists of 41 different sizes in the standard rectangular and Stomp Box, painted variants.
Stomp boxes, colour coded to provide quick ...
- Conductive rubber gaskets
25 September 2019, Conical Technologies, Circuit & System Protection
A range of conductive O-profile silicone rubber gaskets is available from Holland Shielding Systems, developed for high-performance shielding up to 18 GHz and used where environmental and EMI screening ...
- High-temperature TVS MLVs
25 September 2019, Future Electronics, Circuit & System Protection
The new TransGuard VT Series multilayer varistors (MLV) made by AVX are rated for transient voltage suppression (TVS) applications operating at very high temperatures. They provide reliable, bidirectional ...
- Test unit controls access to ESD protected areas
25 September 2019, Altico Static Control Solutions, Circuit & System Protection
In the electronics manufacturing industry, an electrostatic discharge (ESD) can cause irreparable damage to electronic components. This micro-lightning bolt can burn holes through insulating layers and ...
- GNSS boards for dead-reckoning
28 August 2019, Electrocomp, Telecoms, Datacoms, Wireless, IoT
The Locosys RTK-4671-SHDR/MHDR is a high-precision GNSS RTK (global navigation satellite system real-time kinematics) solution targeting the smart driving and lane-level navigation markets.
The newly ...
- Rugged PFC capacitors
28 August 2019, Electrocomp, Passive Components
TDK’s DeltaCap X Black Premium is a new series of Epcos MKD capacitors for power factor correction (PFC). With rated voltages of between 440 V a.c. and 850 V a.c., the capacitors with an internal delta ...
- Power inductors for LED headlights
28 August 2019, Electrocomp, Passive Components
TDK has expanded its lineup of metal core power inductors with the new SPM-VT series that is designed especially for the high thermal and current demands of automotive LED headlights. These wire-wound ...
- EMI AC line filters for avionics
31 July 2019, Conical Technologies, Circuit & System Protection
Part of the AeroQor range, SynQor’s latest EMI AC line filters bring the company’s technology and manufacturing expertise to the avionics COTS component marketplace. The components’ packaging ensures ...
- Ferrite magnetic design tool
26 June 2019, Electrocomp, Passive Components
The MDT software from TDK allows application-related parameters to be calculated for all available Epcos ferrite cores and/or materials. It provides access to digitalised material data including their ...
- N-channel enhancement mode FET
26 June 2019, Electrocomp, Power Electronics / Power Management
Diotec Semiconductor’s 2N7002 is a widely used small-signal MOSFET in SOT-23 package. With an RDS(on) of maximum 2 Ω, the component offers a lower on-state resistance than the common industry standard. ...
- Conductive rubber gaskets
31 July 2019, Conical Technologies, Circuit & System Protection
A range of conductive O-profile silicone rubber gaskets is available from Holland Shielding Systems, developed for high-performance shielding up to 18 GHz and used where environmental and EMI screening ...
|
|
