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Series: DFK

Free Sample Request

Magnetically Compensated Choke, 1- and 3-phase

11 Variants

Approvals and Compliances

Description DFK


  • Current compensated choke
  • 1- or 3-phase choke
  • THT terminals or wire leads
  • Flange for mounting onto printed circuit board
  • Fully potted resign


  • EN 60938
  • UL 1283
  • CSA 22.2 no 8


  • Approval Reference Type: DFK


  • Attenuation of common mode interferences
  • May also be used in direct current applications where magnetic compensation is required
  • Designed for 230/400 VAC applications
Date Category Subcategory Title Download

Rated voltage

Corresponds to the electrical voltage during normal operation.The nominal voltage is specified as the rated voltage and referenced in most cases to an IEC standard, which is referenced as a test basis for the operating parameters.

The nominal voltage is called depending on the operating condition, with AC voltage it is indicated VAC, and in the case of DC voltage as VDC.

up to 440 VAC

Rated Current

The electrical characteristics describe the approved operating values for the state of rated current and rated voltage considering the mentioned conditions.

General information on electrical characteristics colors of fuses

Ratings IEC, UL/CSA
General information on the rated current and the rated voltage at EMC products

Rated Voltage
Rated current
The values are different depending on the approval body and therefore are referenced in the corresponding admission cards for the respective product families. Details about the approvals and ratings are listed in the data sheets.

Search approval information for different families


0.5 - 15 A @ Ta 40 °C

Rated inductance

1 - 20 mH, Tol. -30% +50%

Power Operating Frequency

50 - 400 Hz

Terminal Type

THT, Flexible wire


6 - 163 g

Material: Housing

UL 94V-0 

Sealing Compound

UL 94V-0 

Test Voltage

1.8 kV, 50 Hz, 1 min, winding to winding

Isolation Voltage

2 kV eff., winding to ambient

Climatic Category

Disposition of components in categories for the assessment of mechanical and electrical properties.

Climatic Category

25/100/21 acc. to IEC 60068-1

Allowable Operation Temp.

-25 °C to 100 °C

Detailed information on product approvals, code requirements, usage instructions and detailed test conditions can be looked up in  
General Product Information


Picture(s) Selection of product pictures to display a specific variant of the type


Type Corresponds to a product series and includes various distinct variants. On the type of descriptive data are summarized, eg in the data sheet

Order Number

Order Number Unique part number for placing an order

Configuration key

Configuration key The configuration key of a product consists of the composite key values, which describe the different kinds of attribut distinction.

Model Description

Model Description Abbreviated description of the CAD model


IGS Also mentioned as IGES ( Initial Graphics Exchange Specification). Common program indipendent interchange format for 3D CAD data.


Step Also mentioned as STEP ( Standard for the Exchange of Product Model Data). Common program indipendent interchange format for 3D CAD data standardized according ISO standard.


Parasolid Parasolid modeling kernel is a 3D CAD systems. It is developed by a separate business unit within the Unigraphics Solutions (UGS), now Siemens PLM Software.


DXF (Drawing Interchange Format) is a specified by the Autodesk file format for CAD data exchange, and was developed for the 2D-CAD program AutoCAD. A DXF file describes a CAD model as plain text to the ASCII standard.

The position of the cables of the model is for illustrative purposes only

Dimension [mm]

Case 03

Case 07

Case 11

Case 12

Case 20

Case 25-2

Case 29-4


1 phase

3 phases and neutral

Impedance curves

Short Table of Variants DFK

In [A] Ln [mH] Rcu [mΩ] Order Number

The link on the respective order number refers to a separat tab with specific detailed information .

This assures better readable information of the selected product.
Change to the tab All Products in order to show details of another variant.

This approach offers to use generic alias link to the product details:

www.schurter.xx/art/ [Order Number]

where the following variables are used:
- xx is the country specific domain
- [Order Number]

A=Most Popular

Most popular products have the following customer benefits:

- previously ordered by multiple customers
- generally in stock for immediate delivery
- early adoption or mature life cycle

Contact us for availability on other product variants, lead-times vary:

Availability for all products can be searched real-time. Enter part number and required quantity:

Stock Check SCHURTER

Free Sample

Please ask for free sample in order to check if the products meets your requirement for your application. Send your delivery adress and your specific requirements.

Distributor Stock Check

The following links reffers to the inquiry form for distributors stock information of the selected products. It allows checking for the available amount and optionally to place an order at your selected partner.

Distributor Stock Check

Stock Check Distributor

0.5 10 900 DFK-175-0001 ...
1 10 500 DFK-20-0001 ...
1 20 500 DFK-20-0002 ...
1 10 510 DFK-25-0001 ...
2 10 250 DFK-25-0002 ...
2 20 250 DFK-33-0001 ...
3 10 150 DFK-33-0002 ...
6 4 27 DFK-40-0003 ...
10 2 9 DFK-40-0004 ...
15 1 10 DFK-40-0005 ...
6 4 x 1.5 20 DFK-48-0008 ...

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