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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 27.0Mhz 18pF -10C +70C ECS-270-18-4X-F ECS 1: $0.789 270In Stock	Mfr. Part No. ECS-270-18-4X-F Mouser Part No 520-HCU270-18-4X-F	ECS	Crystals 27.0Mhz 18pF -10C +70C Learn More about ECS hc 49usx quartz crystals	Datasheet	270In Stock	$0.789 $0.657 $0.578 $0.563 View $0.509 $0.481 $0.461 $0.438	Min.: 1 Mult.: 1	27 MHz	18 pF	30 PPM	50 PPM	HC-49/USX	- 10 C	+ 70 C	Radial	30 Ohms	500 uW	11.35 mm	3.8 mm	3.5 mm	HCS-49USX	Bulk
Crystals 3.579545MHz 17pF ECS-35-17-4X ECS 1: $0.775 1,247In Stock	Mfr. Part No. ECS-35-17-4X Mouser Part No 520-HCU357-17X	ECS	Crystals 3.579545MHz 17pF Learn More about ECS hc 49usx quartz crystals	Datasheet	1,247In Stock	$0.775 $0.616 $0.558 $0.556 View $0.473 $0.452 $0.428	Min.: 1 Mult.: 1	3.579545 MHz	17 pF	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	200 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 3.579545MHz SERIES ECS-35-S-4X ECS 1: $0.87 120In Stock 1,000Expected 2/11/2026	Mfr. Part No. ECS-35-S-4X Mouser Part No 520-HCU357-SX	ECS	Crystals 3.579545MHz SERIES Learn More about ECS hc 49usx quartz crystals	Datasheet	120In Stock 1,000Expected 2/11/2026	$0.87 $0.683 $0.609 $0.589 View $0.568 $0.499 $0.486 $0.461	Min.: 1 Mult.: 1	3.579545 MHz	Series	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	200 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 3.6864MHz 100ppm ECS-36-18-4XDN ECS 1: $1.51 91In Stock	Mfr. Part No. ECS-36-18-4XDN Mouser Part No 520-HCU368-18DNX	ECS	Crystals 3.6864MHz 100ppm Learn More about ECS hc 49usx quartz crystals	Datasheet	91In Stock	$1.51 $1.19 $1.09 $1.05 View $1.02 $0.991 $0.936 $0.917	Min.: 1 Mult.: 1	3.6864 MHz	18 pF	30 PPM	100 PPM	HC-49/US	- 40 C	+ 85 C	Radial	200 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 3.6864MHz 18pF ECS-36-18-4X ECS 1: $0.762 2,767In Stock	Mfr. Part No. ECS-36-18-4X Mouser Part No 520-HCU368-18X	ECS	Crystals 3.6864MHz 18pF Learn More about ECS hc 49usx quartz crystals	Datasheet	2,767In Stock	$0.762 $0.615 $0.556 $0.541 View $0.525 $0.495 $0.481	Min.: 1 Mult.: 1	3.6864 MHz	18 pF	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	200 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 3.6864MHz 20pF EX/TEMP HC-49US ECS-36-20-4XDN ECS 1: $0.925 571In Stock	Mfr. Part No. ECS-36-20-4XDN Mouser Part No 520-HCU368-20DNX	ECS	Crystals 3.6864MHz 20pF EX/TEMP HC-49US Learn More about ECS hc 49usx quartz crystals	Datasheet	571In Stock	$0.925 $0.732 $0.668 $0.666 View $0.589 $0.563 $0.521 $0.498	Min.: 1 Mult.: 1	3.6864 MHz	20 pF	30 PPM	100 PPM	HC-49/US	- 40 C	+ 85 C	Radial	200 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 3.6864MHz SERIES ECS-36-S-4X ECS 1: $0.87 14In Stock	Mfr. Part No. ECS-36-S-4X Mouser Part No 520-HCU368-SX	ECS	Crystals 3.6864MHz SERIES Learn More about ECS hc 49usx quartz crystals	Datasheet	14In Stock	$0.87 $0.683 $0.609 $0.589 View $0.518 $0.491 $0.468 $0.449	Min.: 1 Mult.: 1	3.6864 MHz	Series	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	200 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 4MHz 20pF EX/TEMP HC-49US ECS-40-20-4XDN ECS 1: $0.884 1,968In Stock	Mfr. Part No. ECS-40-20-4XDN Mouser Part No 520-HCU400-20DNX	ECS	Crystals 4MHz 20pF EX/TEMP HC-49US Learn More about ECS hc 49usx quartz crystals	Datasheet	1,968In Stock	$0.884 $0.696 $0.613 $0.597 View $0.579 $0.547 $0.507	Min.: 1 Mult.: 1	4 MHz	20 pF	30 PPM	100 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 4MHz 20pF ECS-40-20-4X ECS 1: $0.734 3,337In Stock 5,000Expected 6/11/2026	Mfr. Part No. ECS-40-20-4X Mouser Part No 520-HCU400-20X	ECS	Crystals 4MHz 20pF Learn More about ECS hc 49usx quartz crystals	Datasheet	3,337In Stock 5,000Expected 6/11/2026	$0.734 $0.586 $0.496 $0.48 View $0.465 $0.461 $0.437	Min.: 1 Mult.: 1	4 MHz	20 pF	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	150 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 4MHz SERIES ECS-40-S-4X ECS 1: $0.816 304In Stock	Mfr. Part No. ECS-40-S-4X Mouser Part No 520-HCU400-SX	ECS	Crystals 4MHz SERIES Learn More about ECS hc 49usx quartz crystals	Datasheet	304In Stock	$0.816 $0.645 $0.578 $0.563 View $0.524 $0.496 $0.475 $0.449	Min.: 1 Mult.: 1	4 MHz	Series	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	150 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals CRYSTAL 4.032MHz ECS-40.3-20-4X ECS 1: $0.925 1,016In Stock	Mfr. Part No. ECS-40.3-20-4X Mouser Part No 520-HCU403-20X	ECS	Crystals CRYSTAL 4.032MHz Learn More about ECS hc 49usx quartz crystals	Datasheet	1,016In Stock	$0.925 $0.732 $0.668 $0.666 View $0.657 $0.563 $0.521 $0.498	Min.: 1 Mult.: 1	4.032 MHz	20 pF	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	150 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals CRYSTAL 4.032MHz ECS-40.3-S-4X ECS 1: $0.87 9In Stock	Mfr. Part No. ECS-40.3-S-4X Mouser Part No 520-HCU403-SX	ECS	Crystals CRYSTAL 4.032MHz Learn More about ECS hc 49usx quartz crystals	Datasheet	9In Stock	$0.87 $0.683 $0.609 $0.558 View $0.53 $0.499 $0.486 $0.461	Min.: 1 Mult.: 1	4.032 MHz	Series	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	150 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals CRYSTAL 4.096MHz ECS-41-20-4X ECS 1: $0.83 437In Stock	Mfr. Part No. ECS-41-20-4X Mouser Part No 520-HCU409-20X	ECS	Crystals CRYSTAL 4.096MHz Learn More about ECS hc 49usx quartz crystals	Datasheet	437In Stock	$0.83 $0.657 $0.578 $0.548 View $0.514 $0.487 $0.464 $0.441	Min.: 1 Mult.: 1	4.096 MHz	20 pF	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	150 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 4.194304MHz 12pF ECS-42-12-4X ECS 1: $0.83 936In Stock	Mfr. Part No. ECS-42-12-4X Mouser Part No 520-HCU419-12X	ECS	Crystals 4.194304MHz 12pF Learn More about ECS hc 49usx quartz crystals	Datasheet	936In Stock	$0.83 $0.657 $0.578 $0.563 View $0.514 $0.487 $0.464 $0.441	Min.: 1 Mult.: 1	4.194304 MHz	12 pF	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	150 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals CRYSTAL 4.194304MHz ECS-42-16-4X ECS 1: $0.83 407In Stock	Mfr. Part No. ECS-42-16-4X Mouser Part No 520-HCU419-16X	ECS	Crystals CRYSTAL 4.194304MHz Learn More about ECS hc 49usx quartz crystals	Datasheet	407In Stock	$0.83 $0.657 $0.578 $0.548 View $0.51 $0.483 $0.461 $0.439	Min.: 1 Mult.: 1	4.194304 MHz	16 pF	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	150 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 4.433618MHz 20pF ECS-44-20-4X ECS 1: $0.789 712In Stock	Mfr. Part No. ECS-44-20-4X Mouser Part No 520-HCU443-20X	ECS	Crystals 4.433618MHz 20pF Learn More about ECS hc 49usx quartz crystals	Datasheet	712In Stock	$0.789 $0.628 $0.568 $0.563 View $0.509 $0.481 $0.46 $0.438	Min.: 1 Mult.: 1	4.433618 MHz	20 pF	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	150 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 4.9152MHz 20pF ECS-49-20-4X ECS 1: $0.83 1,082In Stock	Mfr. Part No. ECS-49-20-4X Mouser Part No 520-HCU491-20X	ECS	Crystals 4.9152MHz 20pF Learn More about ECS hc 49usx quartz crystals	Datasheet	1,082In Stock	$0.83 $0.657 $0.578 $0.563 View $0.559 $0.483 $0.461 $0.438	Min.: 1 Mult.: 1	4.9152 MHz	20 pF	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	150 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 4.9152MHz SERIES ECS-49-S-4X ECS 1: $0.87 77In Stock	Mfr. Part No. ECS-49-S-4X Mouser Part No 520-HCU491-SX	ECS	Crystals 4.9152MHz SERIES Learn More about ECS hc 49usx quartz crystals	Datasheet	77In Stock	$0.87 $0.683 $0.577 $0.552 View $0.52 $0.487 $0.464 $0.437	Min.: 1 Mult.: 1	4.9152 MHz	Series	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	150 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 5MHz 20pF ECS-50-20-4X ECS 1: $0.83 488In Stock	Mfr. Part No. ECS-50-20-4X Mouser Part No 520-HCU500-20X	ECS	Crystals 5MHz 20pF Learn More about ECS hc 49usx quartz crystals	Datasheet	488In Stock	$0.83 $0.651 $0.574 $0.559 View $0.541 $0.503 $0.484 $0.461	Min.: 1 Mult.: 1	5 MHz	20 pF	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	120 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 5MHz SERIES ECS-50-S-4X ECS 1: $0.83 87In Stock	Mfr. Part No. ECS-50-S-4X Mouser Part No 520-HCU500-SX	ECS	Crystals 5MHz SERIES Learn More about ECS hc 49usx quartz crystals	Datasheet	87In Stock	$0.83 $0.657 $0.578 $0.548 View $0.51 $0.483 $0.461 $0.439	Min.: 1 Mult.: 1	5 MHz	Series	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	120 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 5.0688MHz 20pF ECS-51-20-4X ECS 1: $0.83 493In Stock	Mfr. Part No. ECS-51-20-4X Mouser Part No 520-HCU506-20X	ECS	Crystals 5.0688MHz 20pF Learn More about ECS hc 49usx quartz crystals	Datasheet	493In Stock	$0.83 $0.657 $0.578 $0.563 View $0.51 $0.483 $0.461 $0.439	Min.: 1 Mult.: 1	5.0688 MHz	20 pF	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	120 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 6MHz 32pF EX/TEMP HC-49US ECS-60-32-4XDN ECS 1: $0.966 100In Stock	Mfr. Part No. ECS-60-32-4XDN Mouser Part No 520-HCU600-32DNX	ECS	Crystals 6MHz 32pF EX/TEMP HC-49US Learn More about ECS hc 49usx quartz crystals	Datasheet	100In Stock	$0.966 $0.758 $0.668 $0.639 View $0.59 $0.564 $0.518 $0.495	Min.: 1 Mult.: 1	6 MHz	32 pF	30 PPM	100 PPM	HC-49/US	- 40 C	+ 85 C	Radial	100 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 6MHz 32pF ECS-60-32-4X ECS 1: $0.789 777In Stock	Mfr. Part No. ECS-60-32-4X Mouser Part No 520-HCU600-32X	ECS	Crystals 6MHz 32pF Learn More about ECS hc 49usx quartz crystals	Datasheet	777In Stock	$0.789 $0.628 $0.568 $0.563 View $0.509 $0.481 $0.461 $0.438	Min.: 1 Mult.: 1	6 MHz	32 pF	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	100 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 6MHz SERIES ECS-60-S-4X ECS 1: $0.83 344In Stock	Mfr. Part No. ECS-60-S-4X Mouser Part No 520-HCU600-SX	ECS	Crystals 6MHz SERIES Learn More about ECS hc 49usx quartz crystals	Datasheet	344In Stock	$0.83 $0.657 $0.578 $0.548 View $0.522 $0.491 $0.476 $0.449	Min.: 1 Mult.: 1	6 MHz	Series	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	100 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 6.144MHz 32pF ECS-61-32-4X ECS 1: $0.789 775In Stock	Mfr. Part No. ECS-61-32-4X Mouser Part No 520-HCU614-32X	ECS	Crystals 6.144MHz 32pF Learn More about ECS hc 49usx quartz crystals	Datasheet	775In Stock	$0.789 $0.631 $0.554 $0.552 View $0.534 $0.514 $0.461 $0.439	Min.: 1 Mult.: 1	6.144 MHz	32 pF	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	100 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk