Radio Interference Suppression Components
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Electrotechnical components Radio Interference Suppression Components

General information on Iskra Capacitors for Radio Interference Suppression Components Type Construction of capacitors Class Page KNB metallized polypropylene film capacitor X2 10 KNR metallized polypropylene film capacitor with X2 24 KNB metallized polypropylene film capacitor Y2 26 KNB metallized polypropylene film capacitor Y1 28 KNB metallized polypropylene film capacitor X1 30 KNB metallized polypropylene film capacitor X2Y2 34 KPB impregnated paper capacitor X1 35 KPR impregnated paper capacitor with resistor X1 37 KPB impregnated paper capacitor Y2 38 KPB impregnated paper capacitor...

General information 1. rigin and spreading O of interference There are two main sources of radio interference: - devices, which due to their construction produce RF energy. These include generators for use in industry, medicine and science, as well as oscillators, radio and TV receivers etc. - devices, which produce a wide spectrum of frequencies due to rapid variations in electrical current intensity. These include devices with switching components, thyristors, triacs, commutators and similar. Interference from source to receiver is spread in three ways: along conductors, by coupling and...

Definitions Taken From Standards: Class X capacitors Class X capacitors are suitable for applications where there is no danger of electrical shock in case of breakdown. Class X capacitors are divided into three subclasses (see table 1) according to the peak voltages of the pulses to which they are exposed during operation in addition to the line voltage. Such impulses can be caused by lightning in overhead lines, switching operations in neighbouring equipment or in the equipment which is shielded by the capacitor. Peak pulse voltage in service Peak value of the surge voltage to be added...

Figure 4: feed through capacitor for symmetrical usage (non-coaxial) Rated frequency Insertion loss The rated frequency is the rated supply frequency for which the capacitor is designed, by which it is described and to which other rated values relate. The insertion loss is the ratio of the voltages both before and after the insertion of the attenuator measured at the connections. Surge voltage A surge voltage is an a-periodic single voltage of a certain profile as described in IEC 60060-1. Figure 5a: single by-pass capacitor Figure 5b: delta by-pass capacitor Figure 5c: example for a...

incorporating the capacitor inparallel with the interference source, interferences are more or less short circuited. A capacitor incorporated in-parallel with power source terminal, suppresses symmetrical interferences, and between a power conductor terminal and the casing or earth it suppresses asymmetrical interferences. Impedance theoretically drops linearly with frequency. Due to shield inductance of the capacitor the capacitor has its own resonant frequency. Above this frequency the capacitor is no self-suppressing component for interference. The value of frequency is decidedly...

7. roduction date code P marking system according to IEC 60062, clause 5.1 Two-character code (year/month) The production date code is indicated with two-characters. The 1st character (letter) indicates the year and the 2nd character (number/ letter) indicates the month. Taping specification for radial capacitors acc. to IEC 60286-2 (Robotic insertion) Dimensions (mm) Descriptions Carrier tape width Hold-down tape width Hotel position Hold-down tape position Feed hole diameter Feed hole pitch Feed hole centre to lead Feed hole centre to component centre Height from feed hole centre to the...

Taped package units Ammo pack Reel pack

Capacitors Type KNB1530 Type KNB1532 Type KNB1533 TECHNICAL DATA Construction: polypropylene film, metallized Rated voltage: Capacitance tolerance: Climatic category: Passive flammability: Temperature range: Test voltage: Max. pulse rise time du/dt, at 390 V D.C. for 275 V A.C. and 425 V D.C. for 300 V A.C.: Dielectric loss tanδ at f = 1 kHz and 20 °C: Soldering time on printed circuit: Self inductance: approx. 10 nH/cm of capacitor length and terminals Available in custom design version. Recommended for serial connection. Electrical connection

ø 0.6 mm for PCM = 10 mm ø 0.8 mm for PCM > 10 mm Casing: thermoplastic, (PP or on request PBT HF) sealed with synthetical resin Thermoplastic material is self-extinguishing according to UL 94, class V-0. Terminals Type Terminal length Tinned copper wire Insulated stranded wire 0.5 mm2 Insulated solid wire ø 0,8 mm End terminals on request Standard values KNB1530, KNB1532, KNB1533, 275 V AC, class X2 For capacitors with insulated leads on request * mini size marking with Approvals in use = • Approvals in pending = o Note: KNB1532 and KNB1533 with PCM = 10 mm are not available with VDE-ENEC.

Standard values KNB1530, KNB1532, KNB1533, 300 V AC, class X2 For capacitors with insulated leads on request * mini size marking with Note: KNB1532 and KNB1533 with PCM = 10 mm are not available with VDE-ENEC. 12 Approvals in use = • Approvals in pending = o

Capacitors with discharge resistor Type KNB1530 Type KNB1532 Type KNB1533 TECHNICAL DATA Construction: capacitor: - resistor: polypropylene film, metallized metaloxide film Rated voltage: Capacitance tolerance: Resistance tolerance: Resistance power: Climatic category: Passive flammability: Temperature range: Test voltage: Max. pulse rise time du/dt, at 425 V D.C.: Dielectric loss tanδ at f = 1 kHz and 20 °C: Soldering time on printed circuit: Self inductance: approx. 10 nH/cm of capacitor length and terminals Electrical connection Available in custom design version. Recommended for serial...

Casing: thermoplastic. (PP or on request PBT HF) sealed with synthetical resin Thermoplastic material and synthetical resin are self-extinguishing according to UL 94. class V-0. Terminals Type Terminal length Tinned copper wire Insulated stranded wire 0.5 mm2 Insulated solid wire ø 0.8 mm End terminals on request Standard values KNB1530, KNB1532, KNB1533, 275 V AC, class X2, with discharge resistor Dimensions Capacitance C (µF) Resistance values according to IEC 60063 range E12. Approvals in use = • Approvals in pending = o Standard values KNB1530, KNB1532, KNB1533, 300 V AC, class X2, with...