muRata BLM18PG121SN1D

The chip ferrite bead BLM series comprises ferrite beads in the shape of a chip. This ferrite bead generates a high impedance which at high frequencies mainly consists of a resistance element. The BLM series is effective in circuits without stable ground lines because the BLM series does not need a connection to ground. Chip sizes of 0.6x0.3, 1.0x0.5, 1.6x0.8, 2.0x1.25, 3.2x1.6 and 4.5x1.6mm are cataloged. (The BLA series of array type chip ferrite beads is also cataloged.) The nickel barrier structure of the external electrodes provides excellent solder heat resistance.

• The BLM series comprises the R series (for digital interface), the A series (for standard), the B series (for high speed signal), the P series (for large current), and the H/E/G series (for GHz range noise suppression).
• BLM - R series can be used in Digital Interface. Resistance of BLM - R series especially grows in the lower frequency range. Therefore BLM - R series is less effective for digital signal waveform at low frequency range and can suppress the ringing.
• BLM - A series generates an impedance from the relatively low frequencies. Therefore the BLM - A series is effective in noise suppression in the wide frequency range (30MHz - several hundred MHz).
• BLM - B series can minimize attenuation of the signal waveform due to its sharp impedance characteristics. Various impedances are available to match signal frequency.
• BLM - P series can be used in high current circuits due to its low DC resistance. It can match power lines to a maximum of 6A DC (BLM41P).
• BLM MH/EG series has a modified internal electrode structure that minimizes stray capacitance and increases the effective frequency range.
• The nickel barrier structure of the external electrodes provides excellent solder heat resistance.
• BLM_A series generates an impedance from the relatively low frequencies. Therefore BLM_A series is effective in noise suppression in a wide frequency range (30MHz - several hundred MHz).
• The small size of BLM03 series (0.6×0.3mm) is suitable for noise suppression in small equipment such as PA modules for cellular phones.