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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 (JPY) 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 14.7456MHz 18pF 50ppm -40C +85C ECS-147.4-18-4XEN ECS 1: ¥91.4 801In Stock	Mfr. Part # ECS-147.4-18-4XEN Mouser Part # 520-147.4-18-4XEN	ECS	Crystals 14.7456MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	801In Stock	¥91.4 ¥71.8 ¥63.3 ¥61.5 View ¥59.6 ¥56.3 ¥51 ¥48.7	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: ¥94.7 385In Stock 1,000Expected 11/2/2026	Mfr. Part # ECS-160-18-4XEN Mouser Part # 520-160-18-4XEN	ECS	Crystals 16MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	385In Stock 1,000Expected 11/2/2026	¥94.7 ¥75.2 ¥66.1 ¥64.4 View ¥62.5 ¥59 ¥51.7 ¥49.3	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: ¥81.4 2,581In Stock 400Expected 10/26/2026	Mfr. Part # ECS-160-20-4X-DU Mouser Part # 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 10/26/2026	¥81.4 ¥65.4 ¥61.1 ¥61 View ¥60.8 ¥57.3 ¥52.7 ¥50.7	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: ¥98 373In Stock	Mfr. Part # ECS-163.8-18-4XEN Mouser Part # 520-163.8-18-4XEN	ECS	Crystals 16.384MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	373In Stock	¥98 ¥77.1 ¥67.1 ¥64.9 View ¥61.8 ¥57.6 ¥55 ¥50	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: ¥98 293In Stock	Mfr. Part # ECS-180-18-4XEN Mouser Part # 520-180-18-4XEN	ECS	Crystals 18MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	293In Stock	¥98 ¥77.1 ¥67.9 ¥64.1 View ¥61 ¥57.3 ¥55.6 ¥53	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: ¥98 1,156In Stock	Mfr. Part # ECS-200-18-4XEN Mouser Part # 520-200-18-4XEN	ECS	Crystals 20MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	1,156In Stock	¥98 ¥77.1 ¥67.9 ¥66.1 View ¥65.6 ¥57.1 ¥55.3 ¥53	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: ¥93 69In Stock	Mfr. Part # ECS-200-20-4X-DU Mouser Part # 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	¥93 ¥73.9 ¥65.1 ¥61.3 View ¥57.5 ¥54 ¥52.5 ¥50	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: ¥101.3 10In Stock	Mfr. Part # ECS-221-18-4XEN Mouser Part # 520-221-18-4XEN	ECS	Crystals 22.1184MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	10In Stock	¥101.3 ¥80.1 ¥71.1 ¥68.9 View ¥59.6 ¥55.3 ¥53 ¥50.7	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: ¥93 2,515In Stock	Mfr. Part # ECS-240-18-4XEN Mouser Part # 520-240-18-4XEN	ECS	Crystals 24MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	2,515In Stock	¥93 ¥73.6 ¥67.6 ¥65.6 View ¥61.8 ¥52.3 ¥50.2	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: ¥93 546In Stock	Mfr. Part # ECS-245.7-18-4XEN Mouser Part # 520-245.7-18-4XEN	ECS	Crystals 24.576MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	546In Stock	¥93 ¥73.6 ¥66.4 ¥66.1 View ¥59.3 ¥54.8 ¥52.7 ¥50.3	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: ¥93 541In Stock	Mfr. Part # ECS-250-18-4X-DU Mouser Part # 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	¥93 ¥73.9 ¥65.1 ¥63.5 View ¥57.5 ¥54 ¥52.5 ¥50	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: ¥93 725In Stock	Mfr. Part # ECS-250-18-4XEN Mouser Part # 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	¥93 ¥74.2 ¥67.9 ¥66.1 View ¥58.6 ¥54.3 ¥52 ¥49.7	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: ¥121.3 1,029In Stock	Mfr. Part # ECS-250-20-4X-F-DN Mouser Part # 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	¥121.3 ¥94.3 ¥87.2 ¥83.7 View ¥80.2 ¥68.8 ¥63.6 ¥60.8	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: ¥98 372In Stock	Mfr. Part # ECS-282.24-18-4X-FEN Mouser Part # 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	¥98 ¥77.1 ¥67.9 ¥66.1 View ¥61 ¥57.3 ¥55.6 ¥53	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: ¥98 981In Stock	Mfr. Part # ECS-286.3-18-4X-F-EN Mouser Part # 520-286.3-18-4X-F-EN	ECS	Crystals 28.63636MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	981In Stock	¥98 ¥77.1 ¥67.9 ¥66.1 View ¥60.1 ¥56.5 ¥54.8 ¥52.3	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: ¥89.7 231In Stock	Mfr. Part # ECS-35-18-4XEN Mouser Part # 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	¥89.7 ¥71.3 ¥62.8 ¥61.1 View ¥57.5 ¥53.2 ¥50.8 ¥48.3	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: ¥86.4 3,003In Stock	Mfr. Part # ECS-40-18-4XEN Mouser Part # 520-40-18-4XEN	ECS	Crystals 4MHz 18pF -10C +70C Learn More about ECS hc 49usx quartz crystals	Datasheet	3,003In Stock	¥86.4 ¥67.8 ¥59.6 ¥58 View ¥56.3 ¥53.2 ¥47.8	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: ¥94.7 156In Stock	Mfr. Part # ECS-400-18-4XEN Mouser Part # 520-400-18-4XEN	ECS	Crystals 40MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	156In Stock	¥94.7 ¥76.1 ¥71.1 ¥68.9 View ¥66.4 ¥55.1 ¥52.8 ¥50.5	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: ¥98 148In Stock	Mfr. Part # ECS-49-18-4XEN Mouser Part # 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	¥98 ¥78.6 ¥69.8 ¥66.1 View ¥63.3 ¥56.3 ¥54.1 ¥51.8	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: ¥88 24In Stock 1,200Expected 11/13/2026	Mfr. Part # ECS-50-18-4XEN Mouser Part # 520-50-18-4XEN	ECS	Crystals 5MHz 18pF -10C +70C Learn More about ECS hc 49usx quartz crystals	Datasheet	24In Stock 1,200Expected 11/13/2026	¥88 ¥70.4 ¥63.6 ¥62 View ¥60.1 ¥56.6 ¥55.5 ¥53.5	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: ¥98 638In Stock	Mfr. Part # ECS-500-18-4X-EN Mouser Part # 520-500-18-4XEN	ECS	Crystals 50MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	638In Stock	¥98 ¥77.1 ¥67.9 ¥66.1 View ¥61 ¥57.3 ¥55.6 ¥53	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: ¥96.3 728In Stock	Mfr. Part # ECS-60-18-4XEN Mouser Part # 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	¥96.3 ¥76.1 ¥67.9 ¥67.8 View ¥63 ¥59 ¥57 ¥54.8	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: ¥101.3 10In Stock	Mfr. Part # ECS-61-18-4XEN Mouser Part # 520-61-18-4XEN	ECS	Crystals 6.144MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	10In Stock	¥101.3 ¥80.1 ¥71.1 ¥68.9 View ¥62.1 ¥58.3 ¥56.8 ¥54	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: ¥101.3 192In Stock	Mfr. Part # ECS-73-18-4XEN Mouser Part # 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	¥101.3 ¥78.7 ¥69.3 ¥62.5 View ¥58.6 ¥54.3 ¥52 ¥49.7	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
Crystals 9MHz 18pF 50ppm -40C +85C ECS-90-18-4XEN ECS 1: ¥98 921In Stock	Mfr. Part # ECS-90-18-4XEN Mouser Part # 520-90-18-4XEN	ECS	Crystals 9MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	921In Stock	¥98 ¥77.1 ¥67.9 ¥67.8 View ¥61 ¥57.3 ¥55.6 ¥53	Min.: 1 Mult.: 1	9 MHz	18 pF	30 PPM	50 PPM	HC-49/USX	- 40 C	+ 85 C	Radial	60 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk

3.579545 MHz
3.6864 MHz
4 MHz
4.032 MHz
4.096 MHz
4.194304 MHz
4.433618 MHz
4.9152 MHz
5 MHz
5.0688 MHz
6 MHz
6.144 MHz
6.5 MHz
7.3728 MHz
7.68 MHz
8 MHz
8.5 MHz
9 MHz
9.216 MHz
9.545 MHz