Product Catalog

1. How to order:

For example:

Soldering Mount Feedthrough Capacitor (H)

C type Circuit (C)

D1 is 3.8mm (38)

D2 is 2.2mm (22)

Body width(L1:1.5mm+L2:3.5mm) is 5.0mm (50)

Lead dia(d) is 0.8mm (08)

Ceramic Material: X7R (X)

Rated voltage is100VDC, (100VDC)

Capacitance is 1000pF (102)

Capacitance tolerance is +80%/-20%  (Z)

Together them,so get out: XWHC3822-5008X-100VDC-102Z

Note:

1.Please offer us part number and order quantity.

2.Custom design is available.

3.Free samples are supplied.

2. Part of Applications

1. Energy Management Systems
2. Computers
3. Automatic Lighting
4. AM Radio Equipment
5. Factory Automation Equipment
6. Implantable Medical Devices(Cochlear Implants,Cardiac Pacemakers,etc.)
7. Military / Space Electronic Modules
8. Radio Controls
9. Telecommunications
10. Televisions and Monitors
11. Laboratory Equipment

3. Electrical Configuration:

A number of different electrical configurations are available in EMI filters,including the common types shown opposite.A single element filter(a capacitor or an inductor) theoretically provides an insertion loss characteristic of 20dB per decade,a dual element filter(capacitor and inductor) 40dB per decade whilst a triple element filter(Pi or T configuration) theoretically yields 60dB per decade.In practise,the insertion loss curves do not exactly match the predictions.and the data of electrical configuration is made primarily on the source and load impedances and may also be influenced by the level of attenuation required at various frequencies.

C Filter

This is a feedthrough capacitor with low(hardly) inductance.It shunts high frequency noise to ground and is suitable for use with a high impedance source and load.

LC Filter

This is an EMI filter with an inductance element in combination with a capacitor.It is commonly used in a circuit with a low impedance source and a high impedance load(or vice versa).

Pi Filter

This is an EMI filter with 2 capacitors and an inductive element between them.Ideally,it should be used where both source and load impedances are high.

T Filter

This is an EMI filter with 2 series inductive elements separated by one feedthrough capacitor.It is suitable for use where both source and load impedances are low.

4. Source and load impedances

Insertion loss figures are normally publishes for a 50 Ohms source and 50 Ohms load circuit.In practice the impedance values will probably be very different,which could result in either an increase or decrease in insertion loss.The electrical configuration of the filter(the capacitor/inductor combination) should be chosen to optimize the filter performance for that particular source/load impedance situation.An estimate of insertion loss for source and load impendence other than 50 Ohms can be supplied.Please contact our Sales Office.

5. Bolt Mount EMI Filter ( Bolt-in Filter )

Bolt Mount EMI Filters provide increased filtering in HF through MICROWAVE frequency spectrums from 100KHz through 10 GHz.The larger hex size means that much higher values of capacitance are available and that a 125 VAC/400 Hz rating in available in certain values.Also designed for mounting in a tapped bulkhead to with the standard nut and lock washer provided,it is optimum in medium to low impedance cricuits where significant amounts of capacitance to ground can be tolerated.In the “L”and “Pi” section versions an internal ferrite bead element provide both inductance and series resistance(lossy characteristic) which improves the insertion loss rolloff to 40dB and 60dB per decade respectively.

Note:

1. Pi design offers steeper insertion loss rolloff.
2. Features rugged monolithic discoidal capacitor construction.
3. Epoxy seal on both ends.

Example:

XWLPi5040-13508X-100VDC -332Z

Technical parameter:

1. Rated Voltage:100VDC
2. Rated Current:10A
3. Capacitance and Tolerance:3300PF +80%,-20% Z
4. Insulation Resistor:>10000M Ohms
5. Dissipate Factor:<3.5%
6. Withstand Voltage:200VDC, one minute No Short Circuit,No Failure.
7. Temperature Feature:-55 ℃ to +125 ℃
8. Circuit :Pi Type
9. Dimension Tolerance:L±0.5mm, W±0.2mm, M / d±0.1mm

The thread stocks we have M2.5,M3,M4,M5,M6,M8,M10 and UNC UNF as follows:

1.Just the dimension above the chart,it is our stocks in our house,and if you have your own dimension request,you can email us that we will open the new models for you,sure,as long as you have the large quantity,we will open the free one for you,if you have order a little,you have to pay some model fee.

2.Voltage: As the above chart,it is only marks the DC,In fact,we also can produce the AC for you as long as your appliance need it.

3.Planting number on the surface,please show your word details.

Capacitance: measured @ 1KHz and .1 to 1 VRMS,25 ℃

Dissipation factor: 3.5% max.

Insulation Resistance:10,000 Mohms min. @25 ℃, WVDC;1000 Mohms min. @ 125 ℃WVDC

Dielectric withstanding voltage: 200% of WVDC min.

6. Solder Mount EMI Filter (Solder-in Filter )

Solder Mount EMI Filter is intended for use as a high reliability alternative a commonly available commercial filter type,Due to its smaller body diameter,capacitance is limited.It does provide effective filtering in the MICROWAVE frequency spectrum from 100MHz through 10GHz.Designed to be soldered into a package,bracket or bulkhead(and maintain hermeticity),it is ideal for high impedance circuits where large capacitance values are not practical.

Alternate lead lengths or special capacitance values are available upon request.

Custom package to bracket assemblies utilizing this feedthru can be furnished to your specifications.

Note:

1.Epoxy seal on both ends.

Example:

XWHC3822-5008X-100VDC -102Z

Technical parameter:

1. Rated Voltage:100VDC
2. Rated Current:7A
3. Capacitance and Tolerance:1000PF+80%,-20%
4. Insulation Resistor:>3000M Ohms
5. Dissipation Factor:<3.5%
6. Withstand Voltage:200VDC, one minute No Short Circuit,No Failure.
7. Temperature Feature:-55 ℃ to +125 ℃
8. Circuit Type:C Type
9. Dimension Tolerance:L±0.5mm, D±0.2mm, d±0.1mm

The soldering parts we had a lot, please contact with us if you are interesting.

1.Just the dimension above the last chart,it is our stocks in our house;

2.Voltage:The above chart,it is only marks the DC,In fact,we also can produce the AC for you as long as your appliance need it;

3.About the plant number on the surface,you can told us what can we plant,we will do it according to your details;

4.If you only accept the Inch unit,we will do it for you too.

7. Multilayer EMI Filter Chips

.Feature and Appliance 

1.Small volume,large capacitance,small capacitance change;

2.Used to manufacture kinds of EMI Filter and related components;

3.Used to prevent RF interference of by pass and flter,have some features of different rated voltage、kinds of temperature feature and outdrawing dimensions,so it fit for aerospace equipment,consumer electronic devices;

4.Temperature Feature:-55℃ to +125℃.

• Electrical Properties

a.W.V.Cap Range:Working Voltage Capacitacne Range;

b.Cap.Tol:Capacitance Tolerance(M=+/-20%);

c.I.R.:Insulation Resistance;

d.D.F.:Dissipation Factor;

e.Temp Coef/Feat:Temperature Coefficient/Feature.

• Order samples:

CT52-Φ2.5-2X1-100VDC-223-M

①         ②     ③        ④        ⑤     ⑥

①Item      ②Dimension Part       ③Temperature Coefficient/Feature

④Rated Voltage(W.V.:Working Voltage) ⑤Capacitance   ⑥Cap Tolerance

Notes:

1. Chips’ Thickness,up to the clients request.
2. Custom design is available.

Application Guidelines

8. Insertion Loss Measurement

Insertion Loss(IL) is a measure of the effectiveness of a filter.it is defined as the ratio of the voltage(E1) across the circuit load without the filter and the voltage(E2) across the load with the filter.Since insertion loss is dependent on the source and load impedance in which the filter is to be used,IL measurement are defined for a matched 50ohms system.The insertion loss is measure in decibels(dB) and defined as follows:

IL(dB) = 20 log [E1 / E2]

Circuit Impedance  VS. Insertion loss

In practical circuit applications the source and load impedances may be quite different from 50ohms.If these impedance are known,Xiangwei Engineering can provide information on the expected Insertion Loss or an estimate can be made using the following formula:

IL(dB)=20log[1+ZsZl / Zt (Zs+ Zl)]

Where Zs=Source impedance in ohms,Zl=Load impedance in ohms,    Zt=Transfer impedance in 50ohms.

Example:

1. System source and load impedance are 100ohms and 600ohms respectively.
2. Selected filter has insertion loss of 50dB at 100 MHz in a 50ohms system.
3. From the IL VS Transfer Impedance curve(right) the transfer impedance is 0.08ohmz.
4. IL = 20log[1+100*600 / 0.08*(100+600)] = 20 log 1072 = 61dB

9. Miniature EMI Filter

XWHC4033-2808S-100VDC-101M

Technical parameter:

1. Rated Voltage:100VDC
2. Rated Current:5A
3. Capacitance and Tolerance:100PF ±20%
4. Insulation Resistor:>3000M Ohms
5. Dissipate Factor:<3.5%
6. Withstand Voltage:200VDC, one minute No Short Circuit,No Failure.
7. Temperature Feature:-55 ℃ to +125 ℃
8. Circuit Type:C Type

The capacitance will be arranged from 10PF to 1uF,the high capacitance only has low rated voltage,and the different materials(SL,NPO,X7R Y5U Y5V Y5P…) depend on the capacitors electric feature.

10. MAX Mounting Torque: