• • • Monolithic Crystals

Monolithic Crystals

Monolithic crystal filter (MCF) products are used in radio and related applications as bandpass filters. Closely related to the quartz crystal resonators used widely for frequency generation, MCF filters employ the piezoelectric and mechanical resonance properties of the quartz material to produce a filter with very high selectivity in a compact package.

Sourcing ECS Inc. International Monolithic Crystals: in-stock lines for quick ship, BOM matching for multi-line builds, and original-channel screening — not keyword stuffing.

BOM matching · Lead time · Authenticity · Brands

Product	Pricing	Datasheet	Number of Poles	Mounting Type	Operating Temperature	Size / Dimension	Frequency - Center	Height (Max)	Ripple	Bandwidth	Impedance	Insertion Loss	Package / Case	Stock & Quantity
ECS-75SMF45A30B ECS Inc. International	1 $19.7900	Datasheet	4	Surface Mount	-30°C ~ 80°C	0.276" L x 0.197" W (7.00mm x 5.00mm)	45 MHz	0.037" (0.95mm)	1dB	30 kHz	1 kOhms	3dB	6-SMD, No Lead	2,480 Buy Now Get Quote
ECS-10.7-15A ECS Inc. International	1 $1.4100	Datasheet	2	Through Hole	-20°C ~ 70°C	0.437" L x 0.185" W (11.10mm x 4.70mm)	10.7 MHz	0.441" (11.20mm)	0.5dB	15 kHz	3 kOhms	2dB	HC-49/U	7,363 Buy Now Get Quote
ECS-96SMF21A15 ECS Inc. International	1 $6.8800	Datasheet	2	Surface Mount	-30°C ~ 80°C	0.276" L x 0.197" W (7.00mm x 5.00mm)	21.4 MHz	0.059" (1.50mm)	1dB	15 kHz	1.5 kOhms	2dB	6-SMD, No Lead	1,374 Buy Now Get Quote
ECS-21K-15B ECS Inc. International	1 $3.7900	Datasheet	4	Through Hole	-20°C ~ 70°C	0.287" L x 0.098" W (7.30mm x 2.50mm)	21.4 MHz	0.315" (8.00mm)	1dB	15 kHz	1.5 kOhms	2dB	UM-1	1,781 Buy Now Get Quote
ECS-96SMF21A30 ECS Inc. International	1 $7.5500	Datasheet	2	Surface Mount	-30°C ~ 80°C	0.276" L x 0.197" W (7.00mm x 5.00mm)	21.4 MHz	0.059" (1.50mm)	1dB	30 kHz	2 kOhms	2dB	6-SMD, No Lead	3,786 Buy Now Get Quote
ECS-21K-15A ECS Inc. International	1 $3.9400	Datasheet	2	Through Hole	-20°C ~ 70°C	0.437" L x 0.185" W (11.10mm x 4.70mm)	21.4 MHz	0.441" (11.20mm)	0.5dB	15 kHz	1.5 kOhms	1.5dB	HC-49/U	3,585 Buy Now Get Quote
ECS-10.7-30A ECS Inc. International	1 $3.9400	Datasheet	2	Through Hole	-20°C ~ 70°C	0.437" L x 0.185" W (11.10mm x 4.70mm)	10.7 MHz	0.441" (11.20mm)	0.5dB	30 kHz	5 kOhms	1.5dB	HC-49/U	5,569 Buy Now Get Quote
ECS-21K-30A ECS Inc. International	1 $4.0900	Datasheet	2	Through Hole	-20°C ~ 70°C	0.437" L x 0.185" W (11.10mm x 4.70mm)	21.4 MHz	0.441" (11.20mm)	0.5dB	30 kHz	1.5 kOhms	1.5dB	HC-49/U	7,088 Buy Now Get Quote
ECS-10.7-7.5A ECS Inc. International	1 $4.6900	Datasheet	2	Through Hole	-20°C ~ 70°C	0.437" L x 0.185" W (11.10mm x 4.70mm)	10.7 MHz	0.441" (11.20mm)	0.5dB	7.5 kHz	1.8 kOhms	1.5dB	HC-49/U	8,735 Buy Now Get Quote
ECS-45K20A ECS Inc. International		Datasheet	2	Through Hole	-20°C ~ 70°C	0.287" L x 0.098" W (7.30mm x 2.50mm)	45 MHz	0.315" (8.00mm)	0.5dB	20 kHz	910 Ohms	2dB	UM-1	3,410 Buy Now Get Quote
ECS-45K7.5B ECS Inc. International	1 $11.2200	Datasheet	4	Through Hole	-20°C ~ 70°C	0.287" L x 0.098" W (7.30mm x 2.50mm)	45 MHz	0.315" (8.00mm)	1dB	30 kHz	350 Ohms	4dB	UM-1	7,848 Buy Now Get Quote
ECS-10.7-15B ECS Inc. International	1 $5.7100	Datasheet	4	Through Hole	-20°C ~ 70°C	0.437" L x 0.185" W (11.10mm x 4.70mm)	10.7 MHz	0.441" (11.20mm)	1dB	15 kHz	3 kOhms	2.5dB	HC-49/U	1,009 Buy Now Get Quote
ECS-45K7.5A ECS Inc. International	1 $6.7700	Datasheet	2	Through Hole	-20°C ~ 70°C	0.287" L x 0.098" W (7.30mm x 2.50mm)	45 MHz	0.315" (8.00mm)	1dB	10 kHz	350 Ohms	2dB	UM-1	7,501 Buy Now Get Quote
ECS-96SMF45A15-TR ECS Inc. International	1 $6.8800	Datasheet	2	Surface Mount	-30°C ~ 80°C	0.276" L x 0.197" W (7.00mm x 5.00mm)	45 MHz	0.059" (1.50mm)	1dB	15 kHz	560 Ohms	2dB	6-SMD, No Lead	6,479 Buy Now Get Quote
ECS-21K-7.5A ECS Inc. International	1 $4.0900	Datasheet	2	Through Hole	-20°C ~ 70°C	0.437" L x 0.185" W (11.10mm x 4.70mm)	21.4 MHz	0.441" (11.20mm)	0.5dB	7.5 kHz	1.5 kOhms	2dB	HC-49/U	8,894 Buy Now Get Quote
ECS-45K30A ECS Inc. International	1 $6.7700	Datasheet	2	Through Hole	-20°C ~ 70°C	0.287" L x 0.098" W (7.30mm x 2.50mm)	45 MHz	0.315" (8.00mm)	1dB	15 kHz	1.2 kOhms	2dB	UM-1	2,338 Buy Now Get Quote
ECS-96SMF45A30 ECS Inc. International	1 $8.8600	Datasheet	2	Surface Mount	-30°C ~ 80°C	0.276" L x 0.197" W (7.00mm x 5.00mm)	45 MHz	0.059" (1.50mm)	1dB	30 kHz	1.2 kOhms	2dB	6-SMD, No Lead	7,562 Buy Now Get Quote
ECS-45K15B ECS Inc. International	1 $11.2200	Datasheet	4	Through Hole	-20°C ~ 70°C	0.287" L x 0.098" W (7.30mm x 2.50mm)	45 MHz	0.315" (8.00mm)	1dB	30 kHz	650 Ohms	3dB	UM-1	2,197 Buy Now Get Quote
ECS-45K20B ECS Inc. International	1 $11.9100	Datasheet	4	Through Hole	-20°C ~ 70°C	0.287" L x 0.098" W (7.30mm x 2.50mm)	45 MHz	0.315" (8.00mm)	1dB	35 kHz	910 Ohms	3dB	UM-1	5,303 Buy Now Get Quote
ECS-75SMF45A7.5B ECS Inc. International	1 $19.7900	Datasheet	4	Surface Mount	-30°C ~ 80°C	0.276" L x 0.197" W (7.00mm x 5.00mm)	45 MHz	0.037" (0.95mm)	1dB	7.5 kHz	350 Ohms	4dB	6-SMD, No Lead	9,922 Buy Now Get Quote