25 all types of chokes correspond to the international specifications for radio interference chokes (en 138100). magnetically compensated multiple chokes dfkh magnetically compensated chokes, used for rfi suppres- dkfp sion in equipment with relatively high asymmetric interfe- dkfs rence. due to its current compensation characteristic, this type of choke presents an active broad-band series impe- dance. environmental ratings: magnetically compensated chokes can only be used when current is compensated. the cur- rent flowing into the choke on one ( ) -side must flow 100% out of the choke from the other ( ) side (see examples). under different conditions the choke will be saturated by the lowest currents and the attenuation efficiency is lost. case 48-2s (smd version) technical data case 48-2 nominal current: 0.5 - 6.3 a @ j j j j j a 40c nominal inductance: 0.5 - 50mh / tol. -30% +50% rated voltage u r (u max. ): 440 vac (dkfp: 250 vac) frequency: 50 - 400 hz test voltage: 1.8 kv/50 hz/1min./wdg.-wdg. (dkfp: 1.5 kv) isolation voltage: 2 kv eff. / wdg.-ambient climatic category: 25/100/21 acc. to iec 60068-1 plastic case: ul 94 v-0 potting resin: ul 94 v-0 smd-version upon request dkfp, dkfs and dfkh series, vertical housing (1) @ j a 40c; current derating over 40c: i = i n x (100- j a)/60 (2) nominal inductance measured according to en 138100, see introduction of this catalog, paragraph 3.4 (3) resistance @ j a 25c type i n (1) l n (2) r cu (3) ~ f res p loss case [a] [mh] [m w ] [mhz] [w] dkfp-6248-d504 0.5 2 x 4 2 x 500 1.2 0.250 48-2 dkfp-6248-0102 0.9 2 x 2 2 x 240 1.6 0.390 48-2 dkfp-6248-02d5 2.0 2 x 0.5 2 x 50 4.5 0.400 48-2 dkfs-6248-d504 0.5 2 x 4 2 x 500 1.2 0.250 48-2s dkfs-6248-0102 0.9 2 x 2 2 x 240 1.6 0.390 48-2s dkfs-6248-02d5 2.0 2 x 0.5 2 x 50 4.5 0.400 48-2s dfkh2-14-0.6-11/a 0.6 2 x11 2 x 600 0.5 0.5 50-2 dfkh2-14-1.0-4/a 1.0 2 x 4 2 x 250 1.2 0.5 51-2 dfkh2-14-2.0-1/a 2.0 2 x 1 2 x 65 2.5 0.5 52-2 dfkh2-22.1.0-20/a 1.0 2 x 20 2 x 500 0.25 1 09-2 dfkh2-22-2.0-6.0/a 2.0 2 x 6.0 2 x 150 0.6 1.3 09-2 dfkh2-22-4.0-1.5/a 4.0 2 x 1.5 2 x 36 1.5 1.2 09-2 dfkh2-22-6.3-0.6/a 6.3 2 x 0.6 2 x 15 2.5 1.4 09-2 dfkh2-31-0.6-50/a 0.6 2 x 50 2 x 1200 0.15 0.9 19-2 dfkh2-31-1.0-33/a 1.0 2 x 33 2 x 700 0.25 1.4 19-2 dfkh2-31-1.4-27/a 1.4 2 x 27 2 x 470 0.3 1.8 19-2 dfkh2-31-2.0-6.8/a 2.0 2 x 6.8 2 x 150 0.5 1.2 19-2 dfkh2-31-4-0-3.3/a 4.0 2 x 3.3 2 x 58 0.8 1.8 19-2 dfkh2-31-6.0-2.0/a 6.0 2 x 2 2 x 24 1.2 1.8 19-2 this range of chokes enables vertical mounting, thus reducing the area of pc board used. finest quality core materials allow the highest electrical performance with minimum component volume. good design with easy assembly allows good cost/performance ratio. this type of choke is essential in the field of power electronics, e.g. switching power supplies, chopper amplifiers, dc drives and stepper motor controls. case 50-2, 51-2, 52-2 09-2 19-2
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