Wurth Elektronik 4W620 WE-74270191

ManufacturerWurth Elektronik
roWaves SKUFT-15
Manufacturer codeWE-74270191
Color codeblack
Material number4W620
Initial permeability (µi)620
Impedance@25MHz, 1 turn: 110Ω
@25MHz, 2 turns: 390Ω
Usable frequency domain1...20MHz (wideband Bal-Un)
Max. RF power1500-2000W (CMC choke)
Curie temperature150°C typ.
Outer diameter (OD)61mm
Internal diameter (ID)35.5mm
View DatasheetAdobe

90,60 RON (excl. VAT)

10 in stock

Usable frequency ranges, depending on the application:

  1. broadband transformers: 1 – 30 MHz
  2. RFI / EMI / CMC suppression: 1 – 20 MHz

An impedance> 1000Ω (for operating frequency) is sufficient for most applications. The coils should be made with very good quality RG-58 coaxial cable. Any high quality RG-58 coaxial cable can allow 1kW power in 160 / 80m. For higher bands> 10MHz, it is recommended to use the additional teflon insulated coaxial cable to keep the losses low.

According to the table below, for Wurth Elektronik 74270191 (our case), between 6 turns (80/40 / 20m) and 10 turns (160m) would be enough to obtain an impedance of at least 800-1000Ω, from 1.8 – 14MHz .

Weight 177 g
Dimensions 6,1 × 6,1 × 2 cm


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