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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 9MHz 18pF 50ppm -40C +85C ECS-90-18-4XEN ECS 1: $0.802 921In Stock	Mfr. Part No. ECS-90-18-4XEN Mouser Part No 520-90-18-4XEN	ECS	Crystals 9MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	921In Stock	$0.802 $0.631 $0.556 $0.555 View $0.499 $0.469 $0.456 $0.434	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
Crystals HC-49USX, 11.0592MHz, 20pF, +/-30ppm, +/-50ppm, -40C +85 C, RoHS ECS-110.5-20-4X-EN ECS 1: $0.748 380In Stock	Mfr. Part No. ECS-110.5-20-4X-EN Mouser Part No 520-ECS-110.5-204XEN	ECS	Crystals HC-49USX, 11.0592MHz, 20pF, +/-30ppm, +/-50ppm, -40C +85 C, RoHS Learn More about ECS hc 49usx quartz crystals	Datasheet	380In Stock	Cut Tape $0.748 $0.588 $0.518 Reel $0.518 $0.503 View $0.488 $0.461 $0.424 $0.404	Min.: 1 Mult.: 1 : 200	11.0592 MHz	20 pF	30 PPM	50 PPM	11.35 mm x 3.5 mm	- 40 C	+ 85 C	Radial	40 Ohms	500 uW	11.35 mm	5 mm	3.5 mm		Reel, Cut Tape
Crystals 16.000 MHz 12 pF HC-49USX +/-30/30 ppm -20 - +70C RoHS ECS-160-12-4X-GM ECS 1: $0.462 438In Stock	Mfr. Part No. ECS-160-12-4X-GM Mouser Part No 520-ECS-160-12-4X-GM	ECS	Crystals 16.000 MHz 12 pF HC-49USX +/-30/30 ppm -20 - +70C RoHS Learn More about ECS hc 49usx quartz crystals	Datasheet	438In Stock	$0.462 $0.369 $0.325 $0.316 View $0.306 $0.271 $0.257 $0.235	Min.: 1 Mult.: 1	16 MHz	12 pF	30 PPM	30 PPM	11.35 mm x 4.65 mm	- 20 C	+ 70 C	Radial	40 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm		Bulk
Crystals 16.000 MHz 18 pF HC-49USX +/-30/50 ppm -20 - +70C RoHS ECS-160-18-4X-EM ECS 1: $0.571 666In Stock	Mfr. Part No. ECS-160-18-4X-EM Mouser Part No 520-ECS-160-18-4X-EM	ECS	Crystals 16.000 MHz 18 pF HC-49USX +/-30/50 ppm -20 - +70C RoHS Learn More about ECS hc 49usx quartz crystals	Datasheet	666In Stock	$0.571 $0.442 $0.401 $0.384 View $0.367 $0.34 $0.329 $0.295	Min.: 1 Mult.: 1	16 MHz	18 pF	30 PPM	50 PPM	11.35 mm x 4.65 mm	- 20 C	+ 70 C	Radial	40 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm		Bulk
Crystals 16.000 MHz 20 pF HC-49USX +/-30/50 ppm -20 - +70C RoHS ECS-160-20-4X-EM ECS 1: $0.462 171In Stock 1,000Expected 2/11/2026	Mfr. Part No. ECS-160-20-4X-EM Mouser Part No 520-ECS-160-20-4X-EM	ECS	Crystals 16.000 MHz 20 pF HC-49USX +/-30/50 ppm -20 - +70C RoHS Learn More about ECS hc 49usx quartz crystals	Datasheet	171In Stock 1,000Expected 2/11/2026	$0.462 $0.369 $0.325 $0.316 View $0.306 $0.271 $0.257 $0.234	Min.: 1 Mult.: 1	16 MHz	20 pF	30 PPM	50 PPM	11.35 mm x 4.65 mm	- 20 C	+ 70 C	Radial	40 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm		Bulk
Crystals 20.000 MHz 18 pF HC-49USX +/-30/30 ppm -20 - +70C RoHS ECS-200-18-4X-GM ECS 1: $0.462 482In Stock	Mfr. Part No. ECS-200-18-4X-GM Mouser Part No 520-ECS-200-18-4X-GM	ECS	Crystals 20.000 MHz 18 pF HC-49USX +/-30/30 ppm -20 - +70C RoHS Learn More about ECS hc 49usx quartz crystals	Datasheet	482In Stock	$0.462 $0.369 $0.325 $0.316 View $0.287 $0.271 $0.257 $0.234	Min.: 1 Mult.: 1	20 MHz	18 pF	30 PPM	30 PPM	11.35 mm x 4.65 mm	- 20 C	+ 70 C	Radial	30 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm		Bulk
Crystals 20.000 MHz 20 pF HC-49USX +/-30/50 ppm -20 - +70C RoHS ECS-200-20-4X-EM ECS 1: $0.462 611In Stock	Mfr. Part No. ECS-200-20-4X-EM Mouser Part No 520-ECS-200-20-4X-EM	ECS	Crystals 20.000 MHz 20 pF HC-49USX +/-30/50 ppm -20 - +70C RoHS Learn More about ECS hc 49usx quartz crystals	Datasheet	611In Stock	$0.462 $0.369 $0.325 $0.316 View $0.306 $0.271 $0.257 $0.235	Min.: 1 Mult.: 1	20 MHz	20 pF	30 PPM	50 PPM	11.35 mm x 4.65 mm	- 20 C	+ 70 C	Radial	30 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm		Bulk
Crystals HC-49USX, 4MHz, 18pF, +/-30ppm, +/-50ppm, -10C +70 C, RoHS ECS-40-18-4X ECS 1: $0.87 220In Stock	Mfr. Part No. ECS-40-18-4X Mouser Part No 520-ECS-40-18-4X	ECS	Crystals HC-49USX, 4MHz, 18pF, +/-30ppm, +/-50ppm, -10C +70 C, RoHS Learn More about ECS hc 49usx quartz crystals	Datasheet	220In Stock	Cut Tape $0.87 $0.683 $0.609 Reel $0.609 $0.589 View $0.568 $0.498 $0.475 $0.449	Min.: 1 Mult.: 1 : 200	4 MHz	18 pF	30 PPM	50 PPM	11.35 mm x 3.5 mm	- 10 C	+ 70 C	Radial	150 Ohms	500 uW	11.35 mm	3.5 mm	3.5 mm		Reel, Cut Tape
Crystals CRYSTAL 8MHZ 18pF 10ppm 10ppm -20 C 70 C ECS-80-18-4X-CKM ECS 1: $0.626 1,538In Stock 2,400Expected 2/11/2026	Mfr. Part No. ECS-80-18-4X-CKM Mouser Part No 520-ECS-80-18-4X-CKM	ECS	Crystals CRYSTAL 8MHZ 18pF 10ppm 10ppm -20 C 70 C Learn More about ECS hc 49usx quartz crystals	Datasheet	1,538In Stock 2,400Expected 2/11/2026	$0.626 $0.50 $0.445 $0.439 View $0.428 $0.40 $0.382 $0.375	Min.: 1 Mult.: 1	8 MHz	18 pF	10 PPM	10 PPM	HC-49/USX	- 20 C	+ 70 C	Radial	80 Ohms	500 uW	11.35 mm	5 mm	3.5 mm	HC-49USX	Bulk
Crystals CRYSTAL 10MHZ 18pF 10ppm 10ppm -20 C 70 C ECS-100-18-4X-CKM ECS 1: $0.666 851In Stock	Mfr. Part No. ECS-100-18-4X-CKM Mouser Part No 520-ECS100-18-4X-CKM	ECS	Crystals CRYSTAL 10MHZ 18pF 10ppm 10ppm -20 C 70 C Learn More about ECS hc 49usx quartz crystals	Datasheet	851In Stock	$0.666 $0.525 $0.486 $0.484 View $0.413 $0.396 $0.37 $0.341	Min.: 1 Mult.: 1	10 MHz	18 pF	10 PPM	10 PPM	HC-49/USX	- 20 C	+ 70 C	Radial	60 Ohms	500 uW	11.35 mm	5 mm	3.5 mm	HC-49USX	Bulk
Crystals CRYSTAL 12MHZ 18pF 10ppm 10ppm -20 C 70 C ECS-120-18-4X-CKM ECS 1: $0.653 860In Stock	Mfr. Part No. ECS-120-18-4X-CKM Mouser Part No 520-ECS120-18-4X-CKM	ECS	Crystals CRYSTAL 12MHZ 18pF 10ppm 10ppm -20 C 70 C Learn More about ECS hc 49usx quartz crystals	Datasheet	860In Stock	$0.653 $0.521 $0.45 $0.434 View $0.432 $0.408 $0.394 $0.388	Min.: 1 Mult.: 1	12 MHz	18 pF	10 PPM	10 PPM	HC-49/USX	- 20 C	+ 70 C	Radial	60 Ohms	500 uW	11.35 mm	5 mm	3.5 mm	HC-49USX	Bulk
Crystals CRYSTAL 20MHZ 18pF 10ppm 10ppm -20 C 70 C ECS-200-18-4X-CKM ECS 1: $0.653 479In Stock	Mfr. Part No. ECS-200-18-4X-CKM Mouser Part No 520-ECS200-18-4X-CKM	ECS	Crystals CRYSTAL 20MHZ 18pF 10ppm 10ppm -20 C 70 C Learn More about ECS hc 49usx quartz crystals	Datasheet	479In Stock	$0.653 $0.521 $0.458 $0.446 View $0.432 $0.408 $0.397 $0.384	Min.: 1 Mult.: 1	20 MHz	18 pF	10 PPM	10 PPM	HC-49/USX	- 20 C	+ 70 C	Radial	30 Ohms	500 uW	11.35 mm	5 mm	3.5 mm	HC-49USX	Bulk
Crystals CRYSTAL 25MHZ 18pF 10ppm 10ppm -20 C 70 C ECS-250-18-4X-CKM ECS 1: $0.653 432In Stock 1,000Expected 27/10/2026	Mfr. Part No. ECS-250-18-4X-CKM Mouser Part No 520-ECS250-18-4X-CKM	ECS	Crystals CRYSTAL 25MHZ 18pF 10ppm 10ppm -20 C 70 C Learn More about ECS hc 49usx quartz crystals	Datasheet	432In Stock 1,000Expected 27/10/2026	$0.653 $0.521 $0.454 $0.438 View $0.424 $0.386 $0.358 $0.33	Min.: 1 Mult.: 1	25 MHz	18 pF	10 PPM	10 PPM	HC-49/USX	- 20 C	+ 70 C	Radial	30 Ohms	500 uW	11.35 mm	5 mm	3.5 mm	HC-49USX	Bulk
Crystals 10MHz 18pF ECS-100-18-4X ECS 1: $0.83 1,643In Stock 2,400Expected 1/2/2027	Mfr. Part No. ECS-100-18-4X Mouser Part No 520-HCU1000-18X	ECS	Crystals 10MHz 18pF Learn More about ECS hc 49usx quartz crystals	Datasheet	1,643In Stock 2,400Expected 1/2/2027	$0.83 $0.657 $0.578 $0.563 View $0.545 $0.50 $0.483 $0.458	Min.: 1 Mult.: 1	10 MHz	18 pF	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	60 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 10MHz SERIES ECS-100-S-4X ECS 1: $0.816 546In Stock 800Expected 26/10/2026	Mfr. Part No. ECS-100-S-4X Mouser Part No 520-HCU1000-SX	ECS	Crystals 10MHz SERIES Learn More about ECS hc 49usx quartz crystals	Datasheet	546In Stock 800Expected 26/10/2026	$0.816 $0.641 $0.578 $0.515 View $0.488 $0.468 $0.449	Min.: 1 Mult.: 1	10 MHz	Series	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	60 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 10.738635MHz SERIES ECS-107.3-S-4X ECS 1: $0.789 928In Stock	Mfr. Part No. ECS-107.3-S-4X Mouser Part No 520-HCU1073-SX	ECS	Crystals 10.738635MHz SERIES Learn More about ECS hc 49usx quartz crystals	Datasheet	928In Stock	$0.789 $0.628 $0.578 $0.563 View $0.509 $0.481 $0.461 $0.439	Min.: 1 Mult.: 1	10.738635 MHz	Series	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	60 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 11MHz SERIES ECS-110-S-4X ECS 1: $0.83 439In Stock	Mfr. Part No. ECS-110-S-4X Mouser Part No 520-HCU1100-SX	ECS	Crystals 11MHz SERIES Learn More about ECS hc 49usx quartz crystals	Datasheet	439In Stock	$0.83 $0.657 $0.578 $0.548 View $0.514 $0.483 $0.469 $0.449	Min.: 1 Mult.: 1	11 MHz	Series	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	60 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 11.0592MHz 20pF ECS-110.5-20-4X ECS 1: $0.775 1,140In Stock	Mfr. Part No. ECS-110.5-20-4X Mouser Part No 520-HCU1105-20X	ECS	Crystals 11.0592MHz 20pF Learn More about ECS hc 49usx quartz crystals	Datasheet	1,140In Stock	$0.775 $0.619 $0.556 $0.541 View $0.525 $0.494 $0.477 $0.454	Min.: 1 Mult.: 1	11.0592 MHz	20 pF	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	60 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 11.0592MHz 32pF ECS-110.5-32-4X ECS 1: $0.789 1,007In Stock	Mfr. Part No. ECS-110.5-32-4X Mouser Part No 520-HCU1105-32X	ECS	Crystals 11.0592MHz 32pF Learn More about ECS hc 49usx quartz crystals	Datasheet	1,007In Stock	$0.789 $0.628 $0.578 $0.563 View $0.559 $0.486 $0.462 $0.439	Min.: 1 Mult.: 1	11.0592 MHz	32 pF	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	60 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 11.0592MHz SERIES ECS-110.5-S-4X ECS 1: $0.83 1,166In Stock	Mfr. Part No. ECS-110.5-S-4X Mouser Part No 520-HCU1105-SX	ECS	Crystals 11.0592MHz SERIES Learn More about ECS hc 49usx quartz crystals	Datasheet	1,166In Stock	$0.83 $0.651 $0.528 $0.50 View $0.498 $0.484 $0.473 $0.449	Min.: 1 Mult.: 1	11.0592 MHz	Series	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	60 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 12MHz 20pF EX/TEMP HC-49US ECS-120-20-4XDN ECS 1: $0.966 388In Stock	Mfr. Part No. ECS-120-20-4XDN Mouser Part No 520-HCU1200-20DNX	ECS	Crystals 12MHz 20pF EX/TEMP HC-49US Learn More about ECS hc 49usx quartz crystals	Datasheet	388In Stock	$0.966 $0.758 $0.668 $0.65 View $0.589 $0.564 $0.518 $0.495	Min.: 1 Mult.: 1	12 MHz	20 pF	30 PPM	100 PPM	HC-49/US	- 40 C	+ 85 C	Radial	60 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 12MHz 32pF ECS-120-32-4X ECS 1: $0.816 1,962In Stock	Mfr. Part No. ECS-120-32-4X Mouser Part No 520-HCU1200-32X	ECS	Crystals 12MHz 32pF Learn More about ECS hc 49usx quartz crystals	Datasheet	1,962In Stock	$0.816 $0.647 $0.57 $0.555 View $0.539 $0.481 $0.458 $0.435	Min.: 1 Mult.: 1	12 MHz	32 pF	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	60 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 12MHz SERIES ECS-120-S-4X ECS 1: $0.816 520In Stock	Mfr. Part No. ECS-120-S-4X Mouser Part No 520-HCU1200-SX	ECS	Crystals 12MHz SERIES Learn More about ECS hc 49usx quartz crystals	Datasheet	520In Stock	$0.816 $0.628 $0.578 $0.545 View $0.509 $0.494 $0.475	Min.: 1 Mult.: 1	12 MHz	Series	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	60 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 12.288MHz Series -10C +70C ECS-122.8-20-4X ECS 1: $0.83 436In Stock	Mfr. Part No. ECS-122.8-20-4X Mouser Part No 520-HCU122.8-20-4X	ECS	Crystals 12.288MHz Series -10C +70C Learn More about ECS hc 49usx quartz crystals	Datasheet	436In Stock	$0.83 $0.673 $0.609 $0.548 View $0.51 $0.483 $0.461 $0.439	Min.: 1 Mult.: 1	12.288 MHz	20 pF	30 PPM	50 PPM	HC-49/USX	- 10 C	+ 70 C	Radial	60 Ohms	500 uW	11.35 mm	3.8 mm	3.5 mm	HCS-49USX	Bulk
Crystals 12.288MHz SERIES ECS-122.8-S-4X ECS 1: $0.83 227In Stock	Mfr. Part No. ECS-122.8-S-4X Mouser Part No 520-HCU1228-SX	ECS	Crystals 12.288MHz SERIES Learn More about ECS hc 49usx quartz crystals	Datasheet	227In Stock	$0.83 $0.657 $0.578 $0.563 View $0.51 $0.483 $0.461 $0.439	Min.: 1 Mult.: 1	12.288 MHz	Series	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	60 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk