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Molded Power Inductor

Choose Wisely: Which Molded Power Inductor (XEL, XAL, or XFL) is Right for You?

Courtesy of Coilcraft : Molded Power Inductor

Coilcraft offers three popular styles of high-performance molded power inductors, designated XEL, XAL and XFL Series. They are mechanically rugged and magnetically shielded for use in high density circuits. Each style offers unique performance benefits.

XEL/XAL – High current & high frequency

  • Wide range of sizes and inductance values (up to size 1580 and 33 µH)
  • Low inductance values for high-frequency applications (as low as 0.072 µH)
  • Low AC losses at high frequency range (2 to 10 MHz)
  • Highest current handling
  • Soft saturation characteristic to withstand high current spikes
  • Very low DCR
  • No thermal aging issue and perfect for high temperature applications

XFL – Lowest losses

  • Lowest DCR
  • Lowest profile
  • Suitable for IoT / Wearables
  • Offers low inductance values for high frequency applications
  • No thermal aging issue

The following table demonstrates the differences in these series.

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View the XEL / XAL / XFL family comparison chart

L nom DCR typ Isat (30%)
XEL4020-222 2.2 µH 35.2 mOhms 5.9 A
XAL4020-222 2.2 µH 35.2 mOhms 5.6 A
XFL4020-222 2.2 µH 21.4 mOhms 3.7 A

The following curves, derived from the Coilcraft Core and Winding Loss Calculator, show that the new XEL has lower AC loss compared to the XAL. XFL has the lowest total power loss.

For high switch frequency power converters that are designed to withstand high peak current, XEL is the best choice.

Common Mode Chokes

Common Mode Chokes with 11 µH to 100 µH Inductance

Courtesy of everything RF : Common Mode Chokes with 11 µH to 100 µH Inductance

The 1812CAN-113NR_ from Coilcraft is a RF Inductor with Inductance 11 uH, DC Resistance 0.27 Ohms, DC Current 460 mA((rms), Operating Temperature -40 to 125 Degree C, Storage Temperature -40 to 150 Degree C. Tags: Wire Wound Inductor. More details for 1812CAN-113NR_ can be seen below.

Product Details

  • Part Number : 1812CAN-113NR_
  • Manufacturer : Coilcraft
  • Description : 11 uH, Wire woundCommon Mode Choke

General Parameters

  • Inductance : 11 uH
  • DC Resistance : 0.27 Ohms
  • Bulk Package : Tape and Reel
  • DC Current : 460 mA((rms)
  • Dimension : 0.195 x 0.125 x 0.118 Inches
  • Mounting : Surface Mount
  • Length : 4.95 mm
  • Width : 3.18 mm
  • Thickness : 3 mm
  • Footprint : 4.95 × 3.18 × 3.0 mm
  • RoHS : Yes
  • Type : Wire Wound Inductor
  • Operating Temperature : -40 to 125 Degree C
  • Storage Temperature : -40 to 150 Degree C
  • Tolerance : 3.3 uH
  • Weight : 120 to 130 mg
  • Note : Isolation : 250 Vrms

 

RF Inductors – Common Mode Choke 

4 RF Inductors from Coilcraft: 

1812CAN Series common mode choke

New Low-profile Common Mode Choke for Noise Suppression in CAN or CAN FD Applications

Courtesy of Coilcraft : New Low-profile Common Mode Choke for Noise Suppression in CAN or CAN FD Applications

Cary, IL, USA — Coilcraft’s new 1812CAN Series common mode chokes provide noise suppression on CAN (1 Mbps) or CAN FD (5 Mbps) data lines in automotive and industrial automation applications. CAN Common Mode Chokes are the most commonly-used filter component to attenuate common mode noise at the CAN bus (Controller Area Network) transceiver’s output. The 1812CAN Series can also be used for the FlexRay automotive bus system.

Measuring just 4.95 X 3.18 X 3.0 mm, the low-profile 1812CAN Series is offered with inductance values from 11 to 100 µH to filter a broad range of common mode noise frequencies with high attenuation. It offers up to 60% lower DCR than other CAN bus chokes, resulting in much lower losses on differential signal lines.

XEL50xx Family inductorsThe 1812CAN Series is qualified to AEC-Q200 Grade 1 standards (-40° to +125°C ambient), making it suitable for automotive and other harsh-environment applications. It features RoHS-compliant, silver-palladium-platinum-glass frit terminations and offers a maximum reflow temperature of 260°C.

Like all Coilcraft products, complete technical specifications and free evaluation samples of the 1812CAN Series are available at www.coilcraft.com. Parts are available from stock and can be ordered on-line at buy.coilcraft.com or by calling a local Coilcraft sales office.

For more information, contact Len Crane, +1-847-639-6400, lcrane@coilcraft.com.

About Coilcraft

Headquartered outside of Chicago in Cary, Illinois, Coilcraft is a leading global supplier of magnetic components including high performance RF chip inductors, power magnetics and filters. In addition to a large selection of standard components, Coilcraft also designs and builds custom magnetics to fit a customer’s exact electrical requirements.

Engineers and buyers consider Coilcraft a preferred supplier because of its reputation for quality, reliable delivery, engineering support and the superior performance of our products. In independent surveys, engineers consistently rank Coilcraft the number one magnetics company they would recommend to a friend.

Coilcraft
1102 Silver Lake Road
Cary, IL 60013 USA
+1-847-639-6400
Fax +1-847-639-1469

What is a Conical Inductor?

Courtesy of Coilcraft : What is a  Conical Inductor?

What are broadband conical inductors and how do they function?

Off-the-shelf “flying lead” and surface mount broadband conical inductors, Figure 1 andFigure 2, are a special type of broadband RF choke that are used to filter radio frequency (RF) and microwave frequency interference from electronic circuits. At high frequency, the RF choke becomes a high impedance element used to isolate noise or DC from desired signals.

How does a conical inductor function?

An inductor placed in series (in line) with a wire or circuit board trace will impede changes in current, such as AC noise current, by temporarily storing energy in a magnetic field and then releasing it back into the circuit. As current through the inductor changes over time (di/dt) the energy stored in the magnetic field of the inductor creates a voltage (V = L × di/dt) that opposes (impedes) a further change in the current. Regardless of whether the current through the inductor is increasing or decreasing, the magnetic field slows the current’s rate of change. Similar to mechanical energy being damped by a shock absorber, the electrical energy of a noise current “spike” in an RF choke is dispersed over time to reduce its impact. Conical inductors provide high impedance over a very wide range of frequencies.

Why does the inductor have a conical shape?

The conical shape limits the effects of stray capacitance and effectively creates a series of narrow band inductors, resulting in high impedance over a very wide bandwidth. A single conical inductor can replace a series of many narrow band inductors.

What applications are appropriate for conical inductors?

Blocking “noise” in RF circuits

The Federal Communications Commission (FCC) has created standards and certifies electronic devices sold or manufactured in the United States meet the electromagnetic interference (EMI) requirements. Worldwide electromagnetic compatibility (EMC) standards organizations include CISPR, IEC, ISO, and EN. FCC regulations are mandatory and apply to devices such as computer, switched-mode power supplies, television receivers, transmitters, and industrial, scientific, and medical (ISM) devices that emit RF radiation. RF chokes, such as conical inductors, are employed in electrical circuits to reduce EMI by attenuating high-frequency noise in order to meet EMC emission and immunity requirements.

The Federal Communications Commission (FCC) has created standards for, and certifies that, electronic devices sold or manufactured in the United States meet the electromagnetic interference (EMI) requirements. Worldwide electromagnetic compatibility (EMC) standards organizations include CISPR, IEC, ISO, and EN. FCC regulations are mandatory and apply to devices such as computer, switched-mode power supplies, television receivers, transmitters, and industrial, scientific, and medical (ISM) devices that emit RF radiation. RF chokes, such as conical inductors, are employed in electrical circuits to reduce EMI by attenuating high-frequency noise in order to meet EMC emission and immunity requirements.

Isolating RF signals from a DC bias / broadband filtering

A broadband (wideband) conical bias choke placed in line with the DC bias of an amplifier blocks a wide range of high frequencies from reaching the DC source. In this way, the bias choke injects the DC bias while isolating the AC signal from distortion by any stray AC noise. The critical determination when choosing an RF choke for a bias tee is the frequency range that needs to be blocked. Other key parameters are DC resistance, current requirements, size and cost. This application note from Coilcraft explains how to successfully apply a DC bias onto the RF line of a Bias Tee using broadband chokes.

What Types of RF Chokes Does Coilcraft Manufacture?

Coilcraft has designed and manufactured off-the-shelf surface mount (BCR  Series) and “flying lead” thru-hole mount(BCL Series) broadband conical inductors for ultra-wideband Bias Tee applications up to 40 GHz:

  • The surface mount BCR versions can be automatically pick-and-placed onto a PCB.
  • The “flying lead” BCL style allows precise positioning of the mounting angle. The optimal mounting angle is application-specific. Generally, larger angles result in better higher-frequency performance.
  • Both the BCR and BCL series have a flat bandwidth with high impedance up to 40 GHz and are ideal for bias tees.

For higher current, lower frequency applications, the 4310LC series of wideband bias chokes are available off-the-shelf. The 4310LC Wideband Bias Chokes are used in high current Bias Tee applications up to 6 GHz.

XAR7030 Raised Power Inductor

Coilcraft XAR7030 Raised Power Inductor

Courtesy of Coilcraft : XAR7030 Raised Power Inductor

XAR7030 Series inductors mark the first time raised inductors are available as standard, off-the-shelf products. They feature terminals that elevate the inductor body 1.5 mm from the printed circuit board surface and measure just 7.1 mm square with a maximum height of 3.2 mm. This allows standard power management IC packages (e.g., QFN/VQFN) to be mounted beneath the inductor in a 3-D packaging arrangement, reducing overall board space. The XAR7030 is available with inductance values ranging from 0.16 to 10 µH and offers extremely low DCR – as low as 1.26 mOhms.

Wirewound Ferrite Beads

Coilcraft Wirewound Ferrite Beads Offer a High Magnitude of Attenuation across a Wide Frequency Range

Courtesy of Coilcraft : Wirewound Ferrite Beads

Cary, IL, USA — Coilcraft offers a broad range of wirewound ferrite beads in standard package sizes from 0201 (0603) to 1812 (4532). Superior attenuation and frequency performance enable smaller solution sizes compared to traditional thick-film chip ferrite beads. Ferrite beads are used as low pass filters to eliminate high frequency noise while allowing low frequency signals or DC current to pass through a circuit.XEL50xx Family inductors Coilcraft wirewound ferrite beads feature a ferrite construction and heavy gauge wire for high current handling. They provide extremely low DCR while maintaining high filtering impedance across a wide bandwidth – up to GHz band.

These features enhance the performance of the choke circuit while potentially reducing board space by replacing a larger chip ferrite bead with an equivalent, or higher-performing wirewound ferrite bead. Coilcraft offers 11 families of wirewound ferrite beads, all of which are RoHS-compliant and halogen free. Three models (the 0603LS0805LS and 1008LS) are qualified to AEC-Q200 Grade 3 standards (-40° to +85°C ambient), making them suitable for automotive and other harsh-environment applications. As with all Coilcraft parts, free evaluation samples of all Coilcraft wirewound ferrite beads are available online at www.coilcraft.com. For more information, contact Len Crane, +1-847-639-6400, lcrane@coilcraft.com.

About Coilcraft

Headquartered outside of Chicago in Cary, Illinois, Coilcraft is a leading global supplier of magnetic components including high performance RF chip inductors, power magnetics and filters. In addition to a large selection of standard components, Coilcraft also designs and builds custom magnetics to fit a customer’s exact electrical requirements.

Engineers and buyers consider Coilcraft a preferred supplier because of its reputation for quality, reliable delivery, engineering support and the superior performance of our products. In independent surveys, engineers consistently rank Coilcraft the number one magnetics company they would recommend to a friend.

Coilcraft
1102 Silver Lake Road
Cary, IL 60013 USA
+1-847-639-6400
Fax +1-847-639-1469

Coilcraft CST2020 Series Current Sense Transformers

CST2020 Series Current Sense Transformers

Courtesy of Coilcraft : CST2020 Series Current Sense Transformers

  • Sensed current up to 40 Amps
  • For use between 400 Hz to 1 MHz
  • Very low primary resistance
  • AEC-Q200 Grade 1 (−40°C to +125°C)
  • Meets Reinforced Insulation per UL 60950-1.
  • 4000 Vrms, one minute isolation (hipot) winding to winding
  • RoHS-compliant. 260°C compatible. Tin-silver over tin over nickel over phos bronze terminations

Core material Ferrite
Terminations Tin-silver over tin over phos bronze (pins 1 – 3);
Tin-silver over tin over nickel over phos bronze (pins 4 – 5)
Weight 7 – 8.5 g
Ambient temperature –40°C to +125°C
Maximum part temperature +165°C (ambient + temp rise)
Storage temperature Component: –40°C to +165°C.
Tray packaging: –40°C to +80°C
Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C /
85% relative humidity)
Failures in Time (FIT) / Mean Time Between Failures (MTBF)
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332
Packaging 100 per tray
PCB washing Tested to MIL-STD-202 Method 215 plus an additional
aqueous wash. See Doc787_PCB_Washing.pdf.

Coilcraft LPD8035V

Miniature 1:1 coupled inductors provide 1500 Vrms isolation between windings

Courtesy of Coilcraft : LPD8035V High-Isolation Miniature Coupled Inductors

LPD8035V Series Miniature 1:1 coupled inductors provide 1500 Vrms, one-minute isolation (hipot) between windings.

  • Ultra-small package size 8.0 × 6.4 × 3.5 mm
  • 1500 Vrms, one minute isolation (hipot) between windings
  • Provides significant size and cost reductions over conventional bobbin-wound alternatives
  • 13 inductance values ranging from 4.7 to 150 µH
  • Peak current ratings up to 2.7 Amps – a 40% increase over previous generation products
  • Tight coupling coefficient: K > 0.97
  • Ideal for Flyback, SEPIC and isolated-Buck converter designs
  • AEC-Q200 Grade 3 qualified (-40°C to +85°C)

Click here for full specs and free samples!

Coilcraft 0201AF

Coilcraft 0201AF (0603) Wirewound Ferrite Beads

Courtesy of Coilcraft : 0201AF (0603) Wirewound Ferrite Beads

  • Higher performance than other surface mount ferrite beads in the market
  • High impedance across a wide bandwidth; up to GHz band
  • Ferrite construction and heavy gauge wire for high current handling
  • Extremely low DCR for high current applications – as low as 0.15 Ohms
  • Eliminates high frequency noise in power supplies or RF signal isolation applications
  • RoHS Compliant, halogen free. 260°C compatible. Matte tin over nickel over
    silver-platinum-glass frit
  •  PDF data sheet

SPECIFICATIONS

What are Ferrite Beads?

Ferrite beads are used as low pass filters to eliminate high frequency noise while allowing low frequency signals or DC current to pass through a circuit. The noise may come from any number of sources including high-frequency switching noise from a power-supply circuit or RF noise in an RF signal-isolation circuit that must be minimized to ensure both signal integrity and antenna efficiency.

Ferrite beads, whether chip or wirewound, are used to filter electromagnetic interference (EMI). You may be surprised to discover that wirewound ferrite beads provide a high magnitude of attenuation over a wide frequency range, whereas traditional thick-film chip ferrite beads have limited options for both attenuation and frequency range.

Wirewound Versus Traditional Chip

In addition to offering better attenuation and frequency performance than their chip counterparts, wirewound ferrite beads also provide lower DC resistance (DCR) and higher current ratings without core saturation, resulting in the highest possible performance in the smallest size.

Wirewound versus Traditional Chip

Coilcraft wirewound ferrite beads come in standard package sizes from 0201 (0603) to 1812 (4532), all providing extremely low DCR while maintaining high filtering impedance over the broadband frequency range. These features enhance the performance of the choke circuit while potentially reducing board space by replacing a larger chip ferrite bead with an equivalent, or higher-performing wirewound ferrite bead.

Figures 2 and 3 demonstrate how Coilcraft wirewound ferrite beads provide superior broadband performance compared to both low- and high-DCR chip ferrite beads. Figure 2 compares the Coilcraft 0402DF-12 wirewound ferrite bead to the lowest-DCR 0402-sized chip ferrite bead. The 0402DF offers higher impedance across the frequency range, providing a greater measure of filtering from 100 MHz and above. Compared to typical high-DCR chip ferrite beads, the Coilcraft wirewound ferrite bead maintains the same high frequency attenuation while providing higher current ratings and 40 percent better DCR.

Wirewound versus Traditional Chip Wirewound versus Traditional Chip
Figure 2 Figure 3

What Types of Ferrite Beads does Coilcraft Manufacture?

  • Ferrite construction for higher current handling
  • Higher inductance values than other inductors
  • Low Losses for low frequency filter applications
  • RoHS Compliant, halogen free, 260°C compatible
  • Samples are available in Coilcraft Designer’s Kits
  • Click on a table row below for detailed information
    about each ferrite bead series
Series Size Max Height Impedance Range (Ohms) AEC-Q200
0201AF 0201 (0603) 0.18 mm 19.89 – 118.6 @ 100 MHz
159.9 – 1,089 @ 900 MHz
026011F 0201 (0603) 0.25 mm 91.52 – 320.5 @ 100 MHz
747.2 – 3,435 @ 900 MHz
0402DF 0402 (1005) 0.66 mm 11.98 – 5,270 @ 100 MHz
93.76 – 7,628 @ 900 MHz
0402AF 0402 (1005) 0.66 mm 11.23 – 331.3 @ 100 MHz
82.23 – 3,593 @ 900 MHz
0603AF 0603 (1608) 0.91 mm 8.83 – 3,807.7 @ 100 MHz
48.14 – 6,332 @ 900 MHz
0603LS 0603 (1608) 1.12 mm 28.21 – 5,760 @ 100 MHz
27.89 – 3,815 @ 900 MHz
Grade 3
0805AF 0805 (2012) 1.52 mm 65.61 – 7,069 @ 100 MHz
26.14 – 2,451 @ 900 MHz
0805LS 0805 (2012) 1.60 mm 48.54 – 7,765 @ 100 MHz
28.82 – 2,265 @ 900 MHz
Grade 3
1008AF 1008 (2520) 1.91 mm 6.09 – 66.51 @ 1 MHz
59.29 – 721.8 @ 10 MHz
1008LS 1008 (2520) 2.03 mm 6.56 – 682.9 @ 1 MHz
63.95 – 7,511 @ 10 MHz
Grade 3
1812LS 1812 (4532) 3.43 mm 77.85 – 7,167 @ 1 MHz
770.7 – 191,219 @ 10 MHz

Tools

Ferrite Bead Finder

Ferrite Bead Comparison

Datasheets

S-Parameter and Spice Models

Designer’s Kits

Related Application Notes

Inductors as RF Chokes

LC Filter Reference Design

Ultra Low-loss Power Inductors

These Ultra Low-loss Power Inductors are Ideal for High Switching Frequencies

Courtesy of Coilcraft : These Ultra Low-loss Power Inductors are Ideal for High Switching Frequencies

Coilcraft’s new XEL50xx Family of high-performance, molded power inductors offer exceptionally low DC resistance and ultra-low AC losses, greatly improving power converter efficiency at high switching frequencies (2 to 5+ MHz) and high ripple current. 

The XEL5020 Series is available in six inductance values from 0.10 to 1.0 µH, with current ratings up to 39 Amps. Learn more …

The XEL5030 Series has 10 values from 0.13 to 4.7 µH, with current ratings up to 44 Amps. Learn more …

Both series feature soft saturation characteristics to withstand high current spikes and have no thermal aging issues.

They are also qualified to AEC-Q200 Grade 1 standards (-40° to +125°C ambient) with a maximum part temperature of +165°C,
suitable for automotive and other harsh-environment applications.

Download datasheets and order Free Samples here!