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HC-49USX Low-Profile Quartz Crystals

ECS HC-49USX Low-Profile Quartz Crystals are cost-effective, lead-free, and RoHS-compliant crystals with a maximum height of 3.5mm. The HC-49USX thru-hole mount, resistance weld-type crystals have an operating temperature range of -10°C to +70°C. The HC-49USX-DN series features an industrial temperature range of -40°C to +85°C. ECS HC-49USX Low-Profile Quartz Crystals feature a frequency range between 3.57MHz and 70MHz.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (DKK) Filter the results in the table by unit price based on your quantity.	Qty.	Frequency	Load Capacitance	Tolerance	Frequency Stability	Package/Case	Minimum Operating Temperature	Maximum Operating Temperature	Termination Style	ESR	Drive Level	Length	Width	Height	Series	Packaging
Crystals 14.31818MHz 18pF 50ppm -40C +85C ECS-143-18-4XEN ECS 1: 3,92 kr. 7In Stock	Mfr. Part No. ECS-143-18-4XEN Mouser Part No 520-143-18-4XEN	ECS	Crystals 14.31818MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	7In Stock	3,92 kr. 3,10 kr. 2,75 kr. 2,52 kr. View 2,31 kr. 2,13 kr. 2,04 kr. 1,95 kr.	Min.: 1 Mult.: 1	14.31818 MHz	18 pF	30 PPM	50 PPM	HC-49/USX	- 40 C	+ 85 C	Radial	40 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 14.7456MHz 18pF 50ppm -40C +85C ECS-147.4-18-4XEN ECS 1: 3,53 kr. 801In Stock	Mfr. Part No. ECS-147.4-18-4XEN Mouser Part No 520-147.4-18-4XEN	ECS	Crystals 14.7456MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	801In Stock	3,53 kr. 2,78 kr. 2,45 kr. 2,37 kr. View 2,31 kr. 2,18 kr. 1,97 kr. 1,88 kr.	Min.: 1 Mult.: 1	14.7456 MHz	18 pF	30 PPM	50 PPM	HC-49/USX	- 40 C	+ 85 C	Radial	40 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 16MHz 18pF 50ppm -40C +85C ECS-160-18-4XEN ECS 1: 3,66 kr. 385In Stock 1.000Expected 02/11/2026	Mfr. Part No. ECS-160-18-4XEN Mouser Part No 520-160-18-4XEN	ECS	Crystals 16MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	385In Stock 1.000Expected 02/11/2026	3,66 kr. 2,91 kr. 2,55 kr. 2,49 kr. View 2,41 kr. 2,28 kr. 1,99 kr. 1,90 kr.	Min.: 1 Mult.: 1	16 MHz	18 pF	30 PPM	50 PPM	HC-49/USX	- 40 C	+ 85 C	Radial	40 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 16.000MHZ 20pF 100 ppm -55C +125C ECS-160-20-4X-DU ECS 1: 3,14 kr. 2.581In Stock 400Expected 26/10/2026	Mfr. Part No. ECS-160-20-4X-DU Mouser Part No 520-160-20-4X-DU	ECS	Crystals 16.000MHZ 20pF 100 ppm -55C +125C Learn More about ECS hc 49usx quartz crystals	Datasheet	2.581In Stock 400Expected 26/10/2026	3,14 kr. 2,53 kr. 2,36 kr. 2,35 kr. View 2,22 kr. 2,04 kr. 1,95 kr.	Min.: 1 Mult.: 1	16 MHz	20 pF	30 PPM	100 PPM	HC-49/USX	- 55 C	+ 125 C	Radial	40 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 16.384MHz 18pF 50ppm -40C +85C ECS-163.8-18-4XEN ECS 1: 3,78 kr. 373In Stock	Mfr. Part No. ECS-163.8-18-4XEN Mouser Part No 520-163.8-18-4XEN	ECS	Crystals 16.384MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	373In Stock	3,78 kr. 2,98 kr. 2,59 kr. 2,51 kr. View 2,39 kr. 2,22 kr. 2,13 kr. 1,93 kr.	Min.: 1 Mult.: 1	16.384 MHz	18 pF	30 PPM	50 PPM	HC-49/USX	- 40 C	+ 85 C	Radial	40 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 18MHz 18pF 50ppm -40C +85C ECS-180-18-4XEN ECS 1: 3,78 kr. 293In Stock	Mfr. Part No. ECS-180-18-4XEN Mouser Part No 520-180-18-4XEN	ECS	Crystals 18MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	293In Stock	3,78 kr. 2,98 kr. 2,63 kr. 2,48 kr. View 2,36 kr. 2,22 kr. 2,15 kr. 2,04 kr.	Min.: 1 Mult.: 1	18 MHz	18 pF	30 PPM	50 PPM	HC-49/USX	- 40 C	+ 85 C	Radial	40 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 20MHz 18pF 50ppm -40C +85C ECS-200-18-4XEN ECS 1: 3,78 kr. 1.156In Stock	Mfr. Part No. ECS-200-18-4XEN Mouser Part No 520-200-18-4XEN	ECS	Crystals 20MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	1.156In Stock	3,78 kr. 2,98 kr. 2,63 kr. 2,55 kr. View 2,54 kr. 2,21 kr. 2,13 kr. 2,04 kr.	Min.: 1 Mult.: 1	20 MHz	18 pF	30 PPM	50 PPM	HC-49/USX	- 40 C	+ 85 C	Radial	30 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 20.000MHZ 20pF 100 ppm -55C +125C ECS-200-20-4X-DU ECS 1: 3,60 kr. 69In Stock	Mfr. Part No. ECS-200-20-4X-DU Mouser Part No 520-200-20-4X-DU	ECS	Crystals 20.000MHZ 20pF 100 ppm -55C +125C Learn More about ECS hc 49usx quartz crystals	Datasheet	69In Stock	3,60 kr. 2,86 kr. 2,51 kr. 2,36 kr. View 2,22 kr. 2,09 kr. 2,03 kr. 1,93 kr.	Min.: 1 Mult.: 1	20 MHz	20 pF	30 PPM	100 PPM	HC-49/USX	- 55 C	+ 125 C	Radial	30 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 22.1184MHz 18pF 50ppm -40C +85C ECS-221-18-4XEN ECS 1: 3,92 kr. 10In Stock	Mfr. Part No. ECS-221-18-4XEN Mouser Part No 520-221-18-4XEN	ECS	Crystals 22.1184MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	10In Stock	3,92 kr. 3,10 kr. 2,75 kr. 2,66 kr. View 2,31 kr. 2,13 kr. 2,04 kr. 1,95 kr.	Min.: 1 Mult.: 1	22.1184 MHz	18 pF	30 PPM	50 PPM	HC-49/USX	- 40 C	+ 85 C	Radial	30 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 24MHz 18pF 50ppm -40C +85C ECS-240-18-4XEN ECS 1: 3,60 kr. 2.405In Stock	Mfr. Part No. ECS-240-18-4XEN Mouser Part No 520-240-18-4XEN	ECS	Crystals 24MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	2.405In Stock	3,60 kr. 2,84 kr. 2,61 kr. 2,54 kr. View 2,39 kr. 2,02 kr. 1,94 kr.	Min.: 1 Mult.: 1	24 MHz	18 pF	30 PPM	50 PPM	HC-49/USX	- 40 C	+ 85 C	Radial	30 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 24.576MHz 18pF 50ppm -40C +85C ECS-245.7-18-4XEN ECS 1: 3,60 kr. 546In Stock	Mfr. Part No. ECS-245.7-18-4XEN Mouser Part No 520-245.7-18-4XEN	ECS	Crystals 24.576MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	546In Stock	3,60 kr. 2,84 kr. 2,57 kr. 2,55 kr. View 2,29 kr. 2,12 kr. 2,04 kr. 1,95 kr.	Min.: 1 Mult.: 1	24.576 MHz	18 pF	30 PPM	50 PPM	HC-49/USX	- 40 C	+ 85 C	Radial	30 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 25.000MHZ 18pF 100 ppm -55C +125C ECS-250-18-4X-DU ECS 1: 3,60 kr. 541In Stock	Mfr. Part No. ECS-250-18-4X-DU Mouser Part No 520-250-18-4X-DU	ECS	Crystals 25.000MHZ 18pF 100 ppm -55C +125C Learn More about ECS hc 49usx quartz crystals	Datasheet	541In Stock	3,60 kr. 2,86 kr. 2,51 kr. 2,45 kr. View 2,22 kr. 2,09 kr. 2,03 kr. 1,93 kr.	Min.: 1 Mult.: 1	25 MHz	18 pF	30 PPM	100 PPM	HC-49/USX	- 55 C	+ 125 C	Radial	30 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 25.000MHZ 18pF 100 ppm -40 C +85C ECS-250-18-4XEN ECS 1: 3,60 kr. 725In Stock	Mfr. Part No. ECS-250-18-4XEN Mouser Part No 520-250-18-4X-EN	ECS	Crystals 25.000MHZ 18pF 100 ppm -40 C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	725In Stock	3,60 kr. 2,86 kr. 2,63 kr. 2,55 kr. View 2,27 kr. 2,10 kr. 2,01 kr. 1,92 kr.	Min.: 1 Mult.: 1	25 MHz	18 pF	30 PPM	50 PPM	HC-49	- 40 C	+ 85 C	Radial	30 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 25.000MHZ 20pF 100 ppm -40 C +85C ECS-250-20-4X-F-DN ECS 1: 4,68 kr. 1.029In Stock	Mfr. Part No. ECS-250-20-4X-F-DN Mouser Part No 520-250-20-4X-F-DN	ECS	Crystals 25.000MHZ 20pF 100 ppm -40 C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	1.029In Stock	4,68 kr. 3,64 kr. 3,37 kr. 3,23 kr. View 3,10 kr. 2,66 kr. 2,45 kr. 2,35 kr.	Min.: 1 Mult.: 1	25 MHz	20 pF	30 PPM	100 PPM	HC-49/USX	- 40 C	+ 85 C	Radial	30 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 28.224MHz 18pF 50ppm -40C +85C ECS-282.24-18-4X-FEN ECS 1: 3,78 kr. 372In Stock	Mfr. Part No. ECS-282.24-18-4X-FEN Mouser Part No 520-282.24-18-4XF-EN	ECS	Crystals 28.224MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	372In Stock	3,78 kr. 2,98 kr. 2,63 kr. 2,55 kr. View 2,36 kr. 2,22 kr. 2,15 kr. 2,04 kr.	Min.: 1 Mult.: 1	28.224 MHz	18 pF	50 PPM	50 PPM		- 40 C	+ 85 C	Radial	30 Ohms	500 uW	3.5 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 28.63636MHz 18pF 50ppm -40C +85C ECS-286.3-18-4X-F-EN ECS 1: 3,78 kr. 776In Stock	Mfr. Part No. ECS-286.3-18-4X-F-EN Mouser Part No 520-286.3-18-4X-F-EN	ECS	Crystals 28.63636MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	776In Stock	3,78 kr. 2,98 kr. 2,63 kr. 2,55 kr. View 2,32 kr. 2,18 kr. 2,12 kr. 2,02 kr.	Min.: 1 Mult.: 1	28.63636 MHz	18 pF	30 PPM	50 PPM	HC-49/USX	- 40 C	+ 85 C	Radial	100 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals CRYSTAL 3.579545MHZ 18PF T/H,HC-49USX, 50ppm, 30ppm,18pF,200 Ohm,Fundamental,-40 C 85 C,HC49/US,0.447" L x 0.183" W (11.35mm x 4.65mm),0.138" (3.50mm) ECS-35-18-4XEN ECS 1: 3,46 kr. 231In Stock	Mfr. Part No. ECS-35-18-4XEN Mouser Part No 520-35-18-4XEN	ECS	Crystals CRYSTAL 3.579545MHZ 18PF T/H,HC-49USX, 50ppm, 30ppm,18pF,200 Ohm,Fundamental,-40 C 85 C,HC49/US,0.447" L x 0.183" W (11.35mm x 4.65mm),0.138" (3.50mm) Learn More about ECS hc 49usx quartz crystals	Datasheet	231In Stock	3,46 kr. 2,75 kr. 2,42 kr. 2,36 kr. View 2,22 kr. 2,05 kr. 1,96 kr. 1,87 kr.	Min.: 1 Mult.: 1	3.579545 MHz	18 pF	30 PPM	50 PPM		- 40 C	+ 85 C	Radial	200 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 4MHz 18pF -10C +70C ECS-40-18-4XEN ECS 1: 3,33 kr. 3.003In Stock	Mfr. Part No. ECS-40-18-4XEN Mouser Part No 520-40-18-4XEN	ECS	Crystals 4MHz 18pF -10C +70C Learn More about ECS hc 49usx quartz crystals	Datasheet	3.003In Stock	3,33 kr. 2,62 kr. 2,31 kr. 2,24 kr. View 2,18 kr. 2,05 kr. 1,85 kr.	Min.: 1 Mult.: 1	4 MHz	18 pF	30 PPM	50 PPM	HC-49/US	- 40 C	+ 85 C	Radial	150 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 40MHz 18pF 50ppm -40C +85C ECS-400-18-4XEN ECS 1: 3,66 kr. 156In Stock	Mfr. Part No. ECS-400-18-4XEN Mouser Part No 520-400-18-4XEN	ECS	Crystals 40MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	156In Stock	3,66 kr. 2,94 kr. 2,75 kr. 2,66 kr. View 2,57 kr. 2,13 kr. 2,04 kr. 1,95 kr.	Min.: 1 Mult.: 1	40 MHz	18 pF	30 PPM	50 PPM	HC-49/USX	- 40 C	+ 85 C	Radial	100 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals CRYSTAL 4.9152MHZ 18PF T/H,HC-49USX, 50ppm, 30ppm,18pF,150 Ohm,Fundamental,-40 C 85 C,HC49/US,0.447" L x 0.183" W (11.35mm x 4.65mm),0.138" (3.50mm) ECS-49-18-4XEN ECS 1: 3,78 kr. 148In Stock	Mfr. Part No. ECS-49-18-4XEN Mouser Part No 520-49-18-4XEN	ECS	Crystals CRYSTAL 4.9152MHZ 18PF T/H,HC-49USX, 50ppm, 30ppm,18pF,150 Ohm,Fundamental,-40 C 85 C,HC49/US,0.447" L x 0.183" W (11.35mm x 4.65mm),0.138" (3.50mm) Learn More about ECS hc 49usx quartz crystals	Datasheet	148In Stock	3,78 kr. 3,04 kr. 2,69 kr. 2,55 kr. View 2,45 kr. 2,18 kr. 2,09 kr. 2,00 kr.	Min.: 1 Mult.: 1	4.9152 MHz	18 pF	30 PPM	50 PPM		- 40 C	+ 85 C	Radial	150 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 5MHz 18pF -10C +70C ECS-50-18-4XEN ECS 1: 3,40 kr. 24In Stock 1.200Expected 13/11/2026	Mfr. Part No. ECS-50-18-4XEN Mouser Part No 520-50-18-4XEN	ECS	Crystals 5MHz 18pF -10C +70C Learn More about ECS hc 49usx quartz crystals	Datasheet	24In Stock 1.200Expected 13/11/2026	3,40 kr. 2,72 kr. 2,45 kr. 2,39 kr. View 2,32 kr. 2,19 kr. 2,14 kr. 2,07 kr.	Min.: 1 Mult.: 1	5 MHz	18 pF	30 PPM	50 PPM	HC-49/US	- 40 C	+ 85 C	Radial	120 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 50MHz 18pF 50ppm -40C +85C ECS-500-18-4X-EN ECS 1: 3,78 kr. 638In Stock	Mfr. Part No. ECS-500-18-4X-EN Mouser Part No 520-500-18-4XEN	ECS	Crystals 50MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	638In Stock	3,78 kr. 2,98 kr. 2,63 kr. 2,55 kr. View 2,36 kr. 2,22 kr. 2,15 kr. 2,04 kr.	Min.: 1 Mult.: 1	50 MHz	18 pF	30 PPM	50 PPM		- 40 C	+ 85 C	Radial	100 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals CRYSTAL 6.0000MHZ 18PF T/H,HC-49USX, 50ppm, 30ppm,18pF,100 Ohm,Fundamental,-40 C 85 C,HC49/US,0.447" L x 0.183" W (11.35mm x 4.65mm),0.138" (3.50mm) ECS-60-18-4XEN ECS 1: 3,72 kr. 728In Stock	Mfr. Part No. ECS-60-18-4XEN Mouser Part No 520-60-18-4XEN	ECS	Crystals CRYSTAL 6.0000MHZ 18PF T/H,HC-49USX, 50ppm, 30ppm,18pF,100 Ohm,Fundamental,-40 C 85 C,HC49/US,0.447" L x 0.183" W (11.35mm x 4.65mm),0.138" (3.50mm) Learn More about ECS hc 49usx quartz crystals	Datasheet	728In Stock	3,72 kr. 2,94 kr. 2,63 kr. 2,62 kr. View 2,43 kr. 2,28 kr. 2,20 kr. 2,12 kr.	Min.: 1 Mult.: 1	6 MHz	18 pF	30 PPM	50 PPM		- 40 C	+ 85 C	Radial	100 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 6.144MHz 18pF 50ppm -40C +85C ECS-61-18-4XEN ECS 1: 3,92 kr. 10In Stock	Mfr. Part No. ECS-61-18-4XEN Mouser Part No 520-61-18-4XEN	ECS	Crystals 6.144MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	10In Stock	3,92 kr. 3,10 kr. 2,75 kr. 2,66 kr. View 2,40 kr. 2,25 kr. 2,19 kr. 2,09 kr.	Min.: 1 Mult.: 1	6.144 MHz	18 pF	30 PPM	50 PPM	HC-49/USX	- 40 C	+ 85 C	Radial	100 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals CRYSTAL 7.3728MHZ 18PF T/H,HC-49USX, 50ppm, 30ppm,18pF,80 Ohm,Fundamental,-40 C 85 C,HC49/US,0.447" L x 0.183" W (11.35mm x 4.65mm),0.138" (3.50mm) ECS-73-18-4XEN ECS 1: 3,92 kr. 192In Stock	Mfr. Part No. ECS-73-18-4XEN Mouser Part No 520-73-18-4XEN	ECS	Crystals CRYSTAL 7.3728MHZ 18PF T/H,HC-49USX, 50ppm, 30ppm,18pF,80 Ohm,Fundamental,-40 C 85 C,HC49/US,0.447" L x 0.183" W (11.35mm x 4.65mm),0.138" (3.50mm) Learn More about ECS hc 49usx quartz crystals	Datasheet	192In Stock	3,92 kr. 3,04 kr. 2,68 kr. 2,41 kr. View 2,27 kr. 2,10 kr. 2,01 kr. 1,92 kr.	Min.: 1 Mult.: 1	7.3728 MHz	18 pF	30 PPM	50 PPM		- 40 C	+ 85 C	Radial	80 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk