roWaves Technologies

Certified Company ISO 9001-2008

Wurth Elektronik 4W620 | 74270191

Colour code: black/grey
Manufacturer code: 74270191
Ordering code: FT-15
Marking code: 1 x black paint side-stripe
Manufacturer part no.: WE-74270191
Material no.: 4W620
Permeability (μi): 620
Frequency range: 1 – 20MHz (wideband BalUn, depends on the application)
RF max. power: 1500-2000W
Curie temp.: 150°C
Ext. diameter: 61mm
Int. diameter: 35.5mm
Height: 20mm
Price :

 15,10 (excl. VAT)

13 in stock

(*Ships in 1-2 business days. VAT amount and the exact shipping cost will be calculated during checkout.)

Usable frequency ranges, depending on the application:

broadband transformers: 1 – 30 MHz

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 .

Technical data-sheet:

Additional information

Weight 175 g
Dimensions 6,1 × 6,1 × 2 cm


There are no reviews yet.

Be the first to review “Wurth Elektronik 4W620 | 74270191”

We use cookies to give you the best online experience on this website, by agreeing to accept their use here, in accordance with our policy.

Privacy Settings

When you visit any website, this can store or retain information in your browser, normally used as cookies. You may limit or control these personal cookie services here.

    Your Cart
    Your cart is empty

      Hi there,

      please choose one of our colleagues below, to request the information you need, or send us an email to You can also use the contact form on the "Contact" page. We are available ONLY  Monday to Friday, from 9-17h. Thank you!