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Capacitors & other Products
CELEM is a Contract Partner of Plustherm Point AG
Celem is the world's leading developer and producer of high power capacitors for induction heating and for wireless power transfer applications.

The extensive catalog of high power capacitors for induction heating, provides our customers with endless options of capacitance, voltages and currents. Celem's engineers and scientists have a vast experience in designing capacitor banks and we provide this knowledge free of charge to our customers.

More than 50 years ago Celem invented the conduction-cooled capacitor, later the well known CSM capacitor and other capacitors and assembly structures that are still the building blocks of the industry.
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Celem's recent patented invention, the C-Cap capacitor is a breakthrough in the world of power capacitors, as it doubles the power density of previous power capacitors.
  • Conduction-Cooled Capacitors
  • Water-Cooled Capacitors
  • C-CAP Capacitors
  • High Temperature Capacitors
  • Matching Transformers
  • Assembly Systems
  • Ultra-High Frequency
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Conduction-Cooled capacitors were invented by CELEM, and are widley used in the industry today. They are very compact and have a high power/volume ratio. 
They are used, for example for:
  • inductive heating resonance circuits
  • medical imaging
  • heat treatment
  • plasma applications
  • wireless power transmission
  • electric vehicles
  • high frequency converter
Properties of the high-performance capacitors:
  • polypropylene-conduction-cooled
  • self-regenerating
  • small EST
  • small losses
  • ​UL94-V0 on request
Guide to using Celem Capacitors
Inquiries
Onlineshop (to follow)
for data sheets click on type designation
CSM IPT
Has a very low profile and hence is ideal for Automotive application.
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CSM NANO
​Is a a low profile small capacitor for up to 250A and 100kVAr.
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CSP 120/200
​Is a new version of the CSP 120 with a power of 200kVAr.
CSM 150
Has a unique bus-bar mounting that made it and its sucessors CELEM's best selling product.
CSP 150
Has  unique bus-bar mounting that made it and its sucessor CELEM's best-selling product.
CSM 150/200
​Is a newer 200kVAr version of CSM 150.
CSP 150/200
is a newer version 200kVAr version of CSP 150.
CSM 150/300
Is CELEM's best CSM 150 capacitors. It provides 300kVAr with 600A.
CSP 150/400
​Is the successor to the CSP 150 and CSP 150/200 with 400kVAr and 800A with the same dimensions.
CMPP
Is the polypropylene version of the mica CP 80/200 used forhigh frequencies and high temperatures.
CSP 180
​is one of CELEM's first capacitors. The CSP 180/300 is a newer version of the capacitors with 300kVAr.
CSP 180/300
​Is a 300kVAR version f the popular CSP 180.
CSM 300N
Is a 300kVAr capacitor with higher voltage / current / capacitance then CSM 150/300.
CPRI 400 New
​Is a new 400kVAr capacitor.
CSP 305A
This type with 300kVAr used to be the prefered building block in many assemblies. Today the CSP 405A and CSP 305A/600 replaces it successfully.
CSP 305B
This type with 300kVAr used to be the prefered building block in many assemblies. Today the CSP 405B and CSP 305B/600 replaces it successfully.
CSP 405A
​Provides 400kVAr in similar dimensions as the CSP 305A.
CSP 405B
Provides 400kVAr in similar dimensions as the CSP 305B.
CSP 305A/600
Is the 3rd generation of CSP 305 with 600kVAr and has similar dimensions as CSP 305A.
CSP 305B/600
​Is the 3rd generation of CSP 305 with 600kVAr and has similar dimensions as CSP 305A.
CSP 300
​Is a 300kVAr MF capacitor that can be mounted in both CSP and CSM mode.
C500T
Is CELEM's best-selling MF capacitor. With 500kVAr it is a great building block for high power systems.
C500Q
​Has the same height as the C500T. Due to its different capacitance element, it provides higher voltages than the C500T.
C700T
Has a the same height as the C500T. Due to its larger diameter it goes up to 85µF.
Water-cooled capacitors are very similar to CELEM's conduction-cooled capacitors, but they incorporate the water cooling inside the capacitor, thus ensuring optimal performance.
They are used, for example for:
  • inductive heating resonance circuits
  • medical imaging
  • heat treatment
  • plasma applications
  • wireless power transmission
  • electric vehicles
  • high frequency converter
Properties of the high-performance capacitors:
  • polypropylene-conduction-cooled
  • self-regenerating
  • small EST
  • small losses
  • ​UL94-V0 on request
Guide to using Celem Capacitors
Inquiries
Onlineshop (to follow)
for data sheets click on type designation
C500TW
is water-cooled with similar dimensions and performance like C500T.
CSP 505
​is a simple 500kVAr water-cooled capacitor.
CSP 555
​is a compact 800kVAr HF water-cooled cpacitor.
CSM 800
is a unique water-cooled capacitor because it can be mounted in CSP or CSM mode.
CSP 1000
Was designed especially for high frequency applications and has extremely high current capabilities with up to 1'000kVAr power.
CSP 1200
​is a very robust capacitor for MF. It can drive up to 1'200kVAr.
CMF
​Water-cooled CMF has a patented structure that enables internal serial connection of 2 elements, hence doubling the voltage of the capacitor.
QUAD 1000
is built with CELEM's patented technology, providing a robust water-cooled capacitor with flexible mounting options.
QUAD 1001 HV
is similar to the QUAD 1000 but is 30% taller. The extra height is translated into highr capacitance values with higher voltages.
CSP 1005/1500
The high-frequency type is a popular building block in many ultra-high power systems, sometimes with over 100 units in a single system.
CSP 1005/1500 Tunable
Provide capacitance tuning for the CSP 1005/1500.
CLF3
Medium to low frequency type has a patented structure. Each capacitor can be mounted in 3 different modes - each with a different capacitance value.
C-Cap capacitors are the latest patented invention by CELEM. Their scientists have developed a new capacitor using out-of-the box thinking. These capacitors have twice the power density, have no hot spots and no magnetic losses.
For Video click here
C-Cap capacitors are the latest patented invention by Celem.

Their scientists have developed a new capacitor using out-of-the-box thinking. These capacitors have twice the power density, have no hot spots and no magnetic losses.

The C-Cap is protected by US Patent 9799454 and US Patent 9865398.

Mounting and cooling instructions  can be found at The New C-Cap Capacitors too.
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C-Cap 02 is an example of 2 capacitance elements connected in series in a single capacitor.   We supply C-Caps with up to 4 level of elements connected internally in Series.  This enables achieving voltages of up to 3'600V in a single unit.
Inquiries
Onlineshop (to follow)
for data sheets click on type designation
C - CAP 01
is the basic C - Cap with power of 900kVAr and capacitance from 0.36 ro 9.5µF. It is a very popular element in multi capacitor systems.
C - CAP 02
​Is built internally from 2 elements in series and hence cn handle up to 1'750Vrms and up to 2'100A.
C - CAP 03
​is quite similar to C - CAP 01 but it has taller element and hence can reach capacitance values uo to 29µF.
C - CAP 04
has a footprint of 100x100mm and can handle 1'200kVAr with currents up to 2'400A power applications.
C - CAP 05
​has a footprint of 130x130mm. This  C - CAP can drive up to 3'000A and is great for low to medium frequency applications.
C - Cap mini
​was developed for relatively low power applications like wireless charging.
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Customized C - Cap
Celem can customize any of the C - Cap capacitor. They have C - Caps with 3 and 4 elements in series with nominal voltages of 3'600Vrms.
Socket for C - CAP 
The socket is a very convient and helps to tighten the M16 nut at the correct torque of 8Nm. The socket is made of stainless steel.
​Torque meter is not included.  
Celem offers its HTC series of high temperature capacitors for temperatures up to 125°C. The HTC Capacitors are made for applications where water cooling is not available, or the cooling water temperature is above 45°C and yet the quality and reliability of Celem capacitors is required.
  • Celems innovative team is constantly searching for new materials to supply added value to customers and capacitors.
  • In recent years it faced requests for capacitors to withstand higher temperatures than the standard polypropylene capacitors for special applications.
  • The use of high temperature film for the HTC series, makes it ideal for wireless power transfer in automotive applications.
  • Upon request, these capacitors can be manufacured with UL certified resin resulting in capacitors with copper and UL plastic casing.
Following types can be executed as HTC Capacitors:

CSM 150/200
max. capacitance with PPS
for 550V: 0.8µF / for 1'000V: 0.2​µF
CSM nano IPT
max. capacitance with PPS
for 550V: 0.1µF / for 1'000V: 0.025µF
CSM nano
max capacitance with PPS
for 550V: 0.15µF  / for 1'000V: 0.05µF
C-CAP mini
​max. capacitance with PPS
for 550V: 0.25µF​ / for 1'000V: 0.075µF
CMPP
max. capacitance with PPS
for 550V: 0.4µF / for 1'000V: 0.1µF
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CSP 120/200
max. capacitance with PPS
for 550V: 0.4µF / for 1'000V: 0.1µF
Inquiries
Celem patented unique planar matching transformers can operate at frequencies between 5kHz to 350kHz and power of up to 1'000kVA. Ratio tapping is easy using a pre-set of bridges. 
Inquiries
Onlineshop (to follow)
for data sheets click on type designation
MT Series
MT matching transformers are uniquely compact and provide an exellent step-down voltage solution for induction-heating systems.

It creatively addresses the key characteristics of high quality matching transformers for high frequency / high power applications.
  • The skin effect in the MT is negligible due to its unique laminar structure. Instead of the traditional copper tubes, the MT winding is made of laminar copper sheets. At 350 kHz this revolutionary structure reduces resistive losses by a factor of 10, and consequently increases overall efficiency to above 90%.
  • The coupling coefficient of the MT is exceptionally high. Using alternating primary and secondary layers of thin copper sheets creates unprecedented coupling and very low reactive losses. The MT was designed to achieve zero stray inductance. This advanced design results in short circuit voltage of less than 10%, so that over 90% of the available reactive power is transmitted to the load.
  • The MT completely avoids de-rating of specification when tapped, through an innovative yet simple combination of identical coil elements that are connected in series and parallel. This enables the transformation ratio to be modified quickly and without power reduction.
  • The frequency range of the MT is exceptionally wide: 5 – 350 kHz. This is made possible by practically eliminating stray inductance, as well as by using high saturation ferrite.
Product Gallery
Specifications
TYPE
UNIT
MT 250
MT 300
MT 500
MT 1000
Dimension (L x W x H)
mm
287.5 x 228 x 125
287.5 x 228 x 170
287.5 x 228 x 170
287.5 x 228 x 260
Weight
kg
18
22
26
45
Tapping
ratio
3:1
4:1, 2:1
6:1, 3:1, 2:1
12:1, 6:1, 4:1, 3:1, 2:1
Max. Primary Voltage
Vrms
600
800
1'200
1'200
Max. Secondary Current
A
1'500
2'000
3'000
6'000
Max. Primary Current
A
500
500, 1'000
500, 1'000, 1'500
500, 1'000, 1'500, 2'000, 3'000
Reactive Power Transfer
%
> 90
> 90
> 90
> 90
Active Efficiency
%
> 95
> 95
> 95
> 95
Max. Power
kVA
250
300
500
1'000
Stray Inductance
µH​
< 0.2
< 0.3
< 0.4
< 1.5
Frequency Range
kHz
20 - 350
20 - 350
20 - 350
20 - 350
Double Primary Windings Option*
NA
​●
​●
​●
​●
Iron Core Option**
NA
 
​●
​●
 
* Double primary windings option: It is possible to get the MT250, MT300, MT500 and the MT1000 with twice the number of the windings in the primary. With this option one can work at lower frequencies down to 10kHz in the MT250, MT300, and MT 500, and down to 2.5kHz in the MT1000. Note that with this option the maximum current in the primary is cut by a factor of 2. ​
​** Silicon Iron core option: It is possible to get the MT300 and the MT500 with a Silicon Iron core instead of the Ferrite core. This option enables low frequency operation (Maximal Volt/turn chart). It is possible to get the Silicon Iron core with the Double primary windings option.
Celems pre-designed assembly systems are available for sale. For customers who require a customized assembly system, Celem offers a free of charge design service, based on its vast experiences in induction heating. 
Inquiries
Onlineshop (to follow)
for data sheets click on type designation
AS 150/3
​is an assembly system for the CSM 150 family of capacitors.
AS 150/5
​is an assembly system for the CSM 150 family of capacitors.
Modular Assembly for CSM
This is a simple series parallel assembly for CSM capacitors. The number of both series and parallel capacitors is flexible and is set by the amount.
AS C - CAP Series
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Ultra-high frequency capacitors are made of Mica and not Polypropylene. They can operate at temperatures up to 150°C, and at frequencies up to 100MHz.
Standard Applications:
  • induction heating
  • Heat treatment
  • Plasma applications
  • resonant circuit
  • medical imaging
  • wireless power transfer
  • EV (electric vehicle) charging
  • IPT
  • High frequency inverters
  • etc.
Features:
  • Ultra-high frequency conduction-cooled capacitor
  • Low ESR
  • Low losses

​Guide to using Celem Capacitors

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CMPP
is the polypropylene version of mica CP 80/200 used for high frequencies and high temperatures.
CP 30/75
​is a 75kVAr Mica capacitor for up to 100MHz and 150°C.
CP 100/150
is a 150kVAr Mica capacitor for up to 100MHz and 150°C.
CP 80/200
​is a 200VAr Mica capacitor for up to 100MHz and 150°C.
CPRI 200
is a 250kVAr Mica capacitor for up to 100MHz and 150°C.
CPRI 300
​is a 300VAr Mica capacitor fo up to 100MHz and 150°C.