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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 (SGD) 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: $0.83 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	$0.83 $0.656 $0.582 $0.534 View $0.488 $0.453 $0.434 $0.415	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: $0.748 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	$0.748 $0.588 $0.518 $0.503 View $0.488 $0.461 $0.418 $0.398	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: $0.775 385In Stock 1,000Expected 2/11/2026	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 2/11/2026	$0.775 $0.616 $0.541 $0.528 View $0.511 $0.483 $0.423 $0.404	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: $0.666 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	$0.666 $0.536 $0.50 $0.499 View $0.498 $0.469 $0.431 $0.415	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: $0.802 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	$0.802 $0.631 $0.549 $0.532 View $0.506 $0.472 $0.45 $0.409	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: $0.802 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	$0.802 $0.631 $0.556 $0.525 View $0.499 $0.469 $0.456 $0.434	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: $0.802 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	$0.802 $0.631 $0.556 $0.541 View $0.537 $0.468 $0.453 $0.434	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: $0.762 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	$0.762 $0.605 $0.533 $0.502 View $0.471 $0.442 $0.43 $0.409	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: $0.83 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	$0.83 $0.656 $0.582 $0.564 View $0.488 $0.453 $0.434 $0.415	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: $0.762 2,505In 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	2,505In Stock	$0.762 $0.602 $0.554 $0.537 View $0.506 $0.428 $0.411	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: $0.762 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	$0.762 $0.602 $0.544 $0.541 View $0.486 $0.449 $0.431 $0.412	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: $0.762 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	$0.762 $0.605 $0.533 $0.52 View $0.471 $0.442 $0.43 $0.409	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: $0.762 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	$0.762 $0.608 $0.556 $0.541 View $0.48 $0.445 $0.426 $0.407	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: $0.993 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	$0.993 $0.772 $0.714 $0.685 View $0.657 $0.563 $0.521 $0.498	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: $0.802 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	$0.802 $0.631 $0.556 $0.541 View $0.499 $0.469 $0.456 $0.434	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: $0.802 981In 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	981In Stock	$0.802 $0.631 $0.556 $0.541 View $0.492 $0.462 $0.449 $0.428	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: $0.734 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	$0.734 $0.583 $0.514 $0.50 View $0.471 $0.435 $0.416 $0.396	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: $0.707 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	$0.707 $0.555 $0.488 $0.475 View $0.461 $0.435 $0.392	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: $0.775 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	$0.775 $0.623 $0.582 $0.564 View $0.544 $0.452 $0.432 $0.413	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: $0.802 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	$0.802 $0.643 $0.571 $0.541 View $0.518 $0.461 $0.443 $0.424	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: $0.721 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	$0.721 $0.577 $0.521 $0.507 View $0.492 $0.464 $0.454 $0.438	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: $0.802 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	$0.802 $0.631 $0.556 $0.541 View $0.499 $0.469 $0.456 $0.434	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: $0.789 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	$0.789 $0.623 $0.556 $0.555 View $0.515 $0.483 $0.466 $0.449	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: $0.83 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	$0.83 $0.656 $0.582 $0.564 View $0.509 $0.477 $0.465 $0.442	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: $0.83 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	$0.83 $0.645 $0.567 $0.511 View $0.48 $0.445 $0.426 $0.407	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