Supprescraft spike-suppression filters are designed to protect sophisticated electronic and electrical equipment from the spikes and surges of current and voltage overloads and from noise, from the AC mains.
They are used for computers, data processors, word processors, electronic cash registers, process control systems, laboratory and medical equipment etc. These filters are supplied as discrete units in metal boxes and are designed to be incorporated into a variety of built-up configurations such as protected mains socket outlets, or protected feed-through units for permanent connection to the AC mains.
The circuit diagram of the typical Supprescraft Spike-suppression Filter module is shown in Figure 1.
Figure 1
These modules are manufactured according to BS 613.1977, IEEE,STD 587 Category B and are rated for 250 V a.c. operation. The maximum impulse current is greater than 5000 A (peak), and energy rating is 40 J. They have less than 3,5 mA earth leakage and are rated for use from -10 to +85°C. Modules available are: 5, 10, 15, 20, 25 A.
Figure 2
Figure 2 shows how an impulse of 5 kV in 1 µs is slowed down and clamped to a nominal level of 500 V, with no overshoot. This provides sufficient protection for most applications. In Figure 3 the RF interference attenuation graph is shown.
Figure 3
The integral EMI/RFI filter provides high attenuation to interference signals in both common and differential modes. The design of special spike-suppression filters with improved parameters may also be considered.
Plastic can versions
These spike-suppression filters are also offered enclosed in plastic cylindrical containers and are suitable for applications where less stringent requirements are called for than the metal box type. Single Pi network and Double pi network configurations are used here.
Clearing the Static: Understanding the significance of ESD audits Actum Electronics
Circuit & System Protection
An ESD (Electrostatic Discharge) audit is the first step in establishing an ESD plan, and it is important to include all areas where ESD-sensitive components are being handled.
Read more...Microchip introduces ECC608 TrustMANAGER Altron Arrow
Circuit & System Protection
To increase security on IoT products and facilitate easier setup and management, Microchip Technology has added the ECC608 TrustMANAGER with Kudelski IoT keySTREAM, Software as a Service (SaaS) to its Trust Platform portfolio of devices, services and tools.
Read more...Antennas to meet all connectivity requirements Electrocomp
Telecoms, Datacoms, Wireless, IoT
Kyocera AVX RF antennas meet today’s connectivity demands in the LTE, Wi-Fi, Bluetooth, GNSS, and ISM wireless bands, available in surface mount, patch or external configurations.
Read more...Varistors for automotive applications Future Electronics
Circuit & System Protection
TDK Corporation has announced the addition of two new varistors to its AVRH series for automotive applications where both are characterised by the high electrostatic discharge-withstanding voltage demanded to ensure the safe operation of safety-critical automotive functions.
Read more...Stainless steel pushbutton enclosures Electrocomp
Enclosures, Racks, Cabinets & Panel Products
he HYPB series from Hammond is a hygienic type 4X stainless steel pushbutton enclosure designed for use in environments where regular high temperature, high-pressure washdowns are required.
Read more...SMD varistors with huge surge current capability Electrocomp
Power Electronics / Power Management
TDK Corporation has introduced two new varistor series in SMD design, the larger of the two capable of handling a surge current of 10 000 A.
Read more...Single-phase EMC filters RS South Africa
Circuit & System Protection
TDK Corporation has expanded its portfolio of single-phase EMC filters for AC and DC applications up to 250 V and rated currents from 6 to 30 A.
Read more...Sealed tantalum capacitors Electrocomp
Passive Components
With an operating temperature range of -55 to 125°C, with voltage derating, these capacitors have been designed especially for avionics and aerospace applications.