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Introduction
Specifications
Environmental
Performance curves
Schematics
Physical characteristics
Tape & Reel
Soldering/Washing

3D Model Datasheet

CF2638L Common Mode Choke

for Power Line Applications

Low profile toroid construction
Surface mount, magnetically shielded package
Up to 2.59 kOhms impedance at 4.5 MHz
1000 Vrms isolation (hipot) between windings
Refer to Designing Common Mode Filters for design guidance.
RoHS-compliant. 260°C compatible. Tin-silver-copper over copper terminations.

Buy Now:

Count	Unit price
1	$5.57
250	$4.58
500	$2.49
1000	$2.16

For high volume or non-stock items, request a quote.

Termination

L = Tin-silver-copper

Packaging

D = 13" machine-ready reel

. in stock, ready to ship today.

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Specifications

Electrical specifications at 25°C.

Part number 1	Lines	Common mode peak impedance (kΩ)	Inductance min (mH) 2	Irms (A) 3	DCR max (mΩ) 4	Isolation Voltage (Vrms) 5
Part number 1	Lines	Common mode peak impedance (kΩ)	Inductance min (mH) 2	Irms (A) 3	DCR max (mΩ) 4	Isolation Voltage (Vrms) 5
CF2638L	2	2.59 @ 4.3 MHz	0.14	2.9	60.0	1000

Notes

When ordering, please specify packaging code: e.g. CF2638LD
Inductance shown for each winding, measured at 10 kHz, 1.01 Vrms, 0 Adc on an Agilent/HP 4263B LCR meter or equivalent.
Irms: Current that causes a 40°C temperature rise from 25°C ambient. This information is for reference only and does not represent absolute maximum ratings.
DCR is specified per winding at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
Isolation (hipot) measured for two seconds

Termination:

RoHS compliant tin-silver-copper over copper.

Packaging:

D = 13″ machine-ready reel. EIA-481 embossed plastic tape (250 parts per full reel). Quantities less than full reel available: in tape (not machine ready) or with leader and trailer ($25 charge).
B = Less than full reel. In an effort to simplify our part numbering system, Coilcraft is eliminating the need for multiple packaging codes. When ordering, simply change the last letter of your part number from B to D.

Environmental

Environmental:

RoHS compliant

Ambient temperature range:

–40°C to +85°C with Irms current

Storage temperature range:

Component: –40°C to +125°C
Tape and reel packaging: –40°C to +80°C

Maximum part temperature:

+125°C (ambient + temp rise)

Failures in Time (FIT) / Mean Time Between Failures (MTBF):

See FIT/MTBF Calculations

Performance curves

Attenuation (Ref: 50 Ohms)

Impedance

Schematics

Physical characteristics

Tape and Reel specification

Parts per reel	Reel dimensions (mm)					Tape dimensions (mm)						Orientation
13" (330 mm)	A	B	C	D	E	W	P	Po	P1	H	T
350	330	100	13	38,4	32,4	32	24	4	2	10,1	0,5

General specification

Core Material:

Ferrite

Weight:

3.2 g

Packaging:

250/13″ reel Plastic tape: 32 mm wide, 0.5 mm thick, 24 mm pocket spacing, 10.1 mm pocket depth

Soldering/Washing

Moisture Sensitivity Level (MSL):

1 (unlimited floor life at <30°C / 85% relative humidity)

Resistance to soldering heat:

Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles

Refer to Soldering Coilcraft Components before soldering.

PCB Washing:

Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.

CF2638L Common Mode Choke

for Power Line Applications