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On-Board Type (DC) EMI Suppression Filters (EMIFILr)

On-Board Type (DC) EMI Suppression Filters ("EMIFIL")

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!Note • This !Note PDF catalog • Please is downloaded read rating and from !CAUTION the website (for of Murata storage, Manufacturing operating, rating, co., ltd. soldering, Therefore, mounting it’s specifications and handling) are in subject this catalog to change to prevent or our smoking products and/or in it may burning, be discontinued etc. without advance notice. Please check with our<br />

sales representatives • This catalog or product has only engineers typical specifications before ordering. because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.<br />

• This PDF catalog has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.<br />

C31E.pdf<br />

08.9.1<br />

BLM18T Series (0603 Size)<br />

1<br />

■ Features<br />

The chip ferrite beads BLM series is designed to<br />

function nearly as a resistor at noise frequencies,<br />

which greatly reduces the possibility of resonance and<br />

leaves signal wave forms undistorted.<br />

BLM series is effective in circuits without stable<br />

ground lines because BLM series does not need a<br />

connection to ground.<br />

The nickel barrier structure of the external<br />

electrodes provides excellent solder heat resistance.<br />

BLM_T series generates an impedance from the<br />

relatively low frequencies. Therefore BLM_T series is<br />

effective in noise suppression in a wide frequency<br />

range (10MHz to several hundred MHz).<br />

BLM_T series contributes further to miniaturizing<br />

portable equipment.<br />

BLM18T Series<br />

1.6±0.15 0.8±0.15<br />

0.4±0.2<br />

0.6±0.10<br />

: Electrode<br />

(in mm)<br />

Part Number<br />

Impedance<br />

(at 100MHz/20°C)<br />

(ohm)<br />

Rated Current<br />

(mA)<br />

<strong>DC</strong> Resistance (max.)<br />

(ohm)<br />

Operating<br />

Temperature Range<br />

(°C)<br />

BLM18TG121TN1 120 ±25% 200 0.25 -55 to +125<br />

BLM18TG221TN1 220 ±25% 200 0.30 -55 to +125<br />

BLM18TG601TN1 600 ±25% 200 0.45 -55 to +125<br />

BLM18TG102TN1 1000 ±25% 100 0.60 -55 to +125<br />

■ Impedance - Frequency (Typical)<br />

1200<br />

BLM18T Series<br />

BLM18TG102TN1<br />

Impedance (Ω)<br />

800<br />

400<br />

BLM18TG601TN1<br />

BLM18TG221TN1<br />

BLM18TG121TN1<br />

0<br />

1 10 100 1000<br />

Frequency (MHz)<br />

■ Impedance - Frequency Characteristics<br />

BLM18TG121TN1<br />

BLM18TG221TN1<br />

150<br />

300<br />

Z<br />

120<br />

250<br />

Z<br />

Impedance (Ω)<br />

90<br />

60<br />

30<br />

R<br />

X<br />

Impedance (Ω)<br />

200<br />

150<br />

100<br />

50<br />

R<br />

X<br />

0<br />

1 10 100 1000<br />

0<br />

1 10 100 1000<br />

Frequency (MHz)<br />

Frequency (MHz)<br />

Continued on the following page.<br />

32

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