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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 6.144MHz 32pF ECS-61-32-4X ECS 1: ¥96.3 775In Stock	Mfr. Part # ECS-61-32-4X Mouser Part # 520-HCU614-32X	ECS	Crystals 6.144MHz 32pF Learn More about ECS hc 49usx quartz crystals	Datasheet	775In Stock	¥96.3 ¥77.1 ¥67.6 ¥67.4 View ¥65.3 ¥62.8 ¥56.3 ¥53.7	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
Crystals 6.5MHz 20pF ECS-65-20-4X ECS 1: ¥96.3 959In Stock	Mfr. Part # ECS-65-20-4X Mouser Part # 520-HCU650-20X	ECS	Crystals 6.5MHz 20pF Learn More about ECS hc 49usx quartz crystals	Datasheet	959In Stock	¥96.3 ¥76.7 ¥69.4 ¥68.8 View ¥66.6 ¥58.8 ¥56.3 ¥53.7	Min.: 1 Mult.: 1	6.5 MHz	20 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 7.3728MHz 20pF EX/TEMP HC-49US ECS-73-20-4XDN ECS 1: ¥116.3 570In Stock 1,600Expected 10/27/2026	Mfr. Part # ECS-73-20-4XDN Mouser Part # 520-HCU737-20DNX	ECS	Crystals 7.3728MHz 20pF EX/TEMP HC-49US Learn More about ECS hc 49usx quartz crystals	Datasheet	570In Stock 1,600Expected 10/27/2026	¥116.3 ¥92 ¥81.1 ¥78.9 View ¥76.6 ¥68.8 ¥63.1 ¥60.3	Min.: 1 Mult.: 1	7.3728 MHz	20 pF	30 PPM	100 PPM	HC-49/US	- 40 C	+ 85 C	Radial	80 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 7.3728MHz 20pF ECS-73-20-4X ECS 1: ¥96.3 364In Stock 1,000Expected 2/16/2027	Mfr. Part # ECS-73-20-4X Mouser Part # 520-HCU737-20X	ECS	Crystals 7.3728MHz 20pF Learn More about ECS hc 49usx quartz crystals	Datasheet	364In Stock 1,000Expected 2/16/2027	¥96.3 ¥76.9 ¥70.6 ¥68.8 View ¥64.4 ¥61 ¥58.8 ¥55.8	Min.: 1 Mult.: 1	7.3728 MHz	20 pF	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	80 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 7.68MHz 20pF ECS-76.8-20-4X ECS 1: ¥106.3 1,397In Stock	Mfr. Part # ECS-76.8-20-4X Mouser Part # 520-HCU768-20X	ECS	Crystals 7.68MHz 20pF Learn More about ECS hc 49usx quartz crystals	Datasheet	1,397In Stock	¥106.3 ¥83.2 ¥74.4 ¥71.3 View ¥63.3 ¥59.8 ¥57.1 ¥54.8	Min.: 1 Mult.: 1	7.68 MHz	20 pF	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	80 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 8MHz 18pF EX/TEMP HC-49US ECS-80-18-4XDN ECS 1: ¥117.9 1,098In Stock	Mfr. Part # ECS-80-18-4XDN Mouser Part # 520-HCU800-18DNX	ECS	Crystals 8MHz 18pF EX/TEMP HC-49US Learn More about ECS hc 49usx quartz crystals	Datasheet	1,098In Stock	¥117.9 ¥92.5 ¥81.6 ¥79.4 View ¥76.9 ¥71.1 ¥66.4 ¥63.3	Min.: 1 Mult.: 1	8 MHz	18 pF	30 PPM	100 PPM	HC-49/US	- 40 C	+ 85 C	Radial	80 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 8MHz 18pF ECS-80-18-4X ECS 1: ¥94.7 1,108In Stock	Mfr. Part # ECS-80-18-4X Mouser Part # 520-HCU800-18X	ECS	Crystals 8MHz 18pF Learn More about ECS hc 49usx quartz crystals	Datasheet	1,108In Stock	¥94.7 ¥75.6 ¥68.1 ¥66.3 View ¥64.1 ¥60.6 ¥58.1 ¥54.8	Min.: 1 Mult.: 1	8 MHz	18 pF	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	80 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 8MHz 20pF ECS-80-20-4X ECS 1: ¥99.7 1,987In Stock	Mfr. Part # ECS-80-20-4X Mouser Part # 520-HCU800-20X	ECS	Crystals 8MHz 20pF Learn More about ECS hc 49usx quartz crystals	Datasheet	1,987In Stock	¥99.7 ¥78.2 ¥69.4 ¥66.9 View ¥66.6 ¥63 ¥61.5 ¥58.5	Min.: 1 Mult.: 1	8 MHz	20 pF	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	80 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 8MHz 32pF ECS-80-32-4X ECS 1: ¥101.3 350In Stock	Mfr. Part # ECS-80-32-4X Mouser Part # 520-HCU800-32X	ECS	Crystals 8MHz 32pF Learn More about ECS hc 49usx quartz crystals	Datasheet	350In Stock	¥101.3 ¥80.2 ¥70.6 ¥68.8 View ¥62.8 ¥59.3 ¥56.6 ¥53.7	Min.: 1 Mult.: 1	8 MHz	32 pF	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	80 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 8MHz SERIES ECS-80-S-4X ECS 1: ¥101.3 945In Stock	Mfr. Part # ECS-80-S-4X Mouser Part # 520-HCU800-SX	ECS	Crystals 8MHz SERIES Learn More about ECS hc 49usx quartz crystals	Datasheet	945In Stock	¥101.3 ¥80.2 ¥70.6 ¥68.8 View ¥62.3 ¥59 ¥56.3 ¥53.7	Min.: 1 Mult.: 1	8 MHz	Series	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	80 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals CRYSTAL 8.5MHz ECS-85-S-4X ECS 1: ¥101.3 807In Stock	Mfr. Part # ECS-85-S-4X Mouser Part # 520-HCU850-SX	ECS	Crystals CRYSTAL 8.5MHz Learn More about ECS hc 49usx quartz crystals	Datasheet	807In Stock	¥101.3 ¥80.2 ¥70.6 ¥68.8 View ¥63.8 ¥60 ¥58.1 ¥54.8	Min.: 1 Mult.: 1	8.5 MHz	Series	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	80 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 9MHz SERIES ECS-90-S-4X ECS 1: ¥96.3 518In Stock	Mfr. Part # ECS-90-S-4X Mouser Part # 520-HCU900-SX	ECS	Crystals 9MHz SERIES Learn More about ECS hc 49usx quartz crystals	Datasheet	518In Stock	¥96.3 ¥76.7 ¥69.4 ¥68.8 View ¥62.1 ¥58.8 ¥56.3 ¥53.7	Min.: 1 Mult.: 1	9 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 9.216MHz 20pF ECS-92.1-20-4X ECS 1: ¥106.3 800In Stock	Mfr. Part # ECS-92.1-20-4X Mouser Part # 520-HCU921-20X	ECS	Crystals 9.216MHz 20pF Learn More about ECS hc 49usx quartz crystals	Datasheet	800In Stock	¥106.3 ¥83.4 ¥74.4 ¥71.9 View ¥63.8 ¥60.3 ¥57.6 ¥54.8	Min.: 1 Mult.: 1	9.216 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 9.8304MHz SERIES ECS-98.3-S-4X ECS 1: ¥101.3 74In Stock	Mfr. Part # ECS-98.3-S-4X Mouser Part # 520-HCU983-SX	ECS	Crystals 9.8304MHz SERIES Learn More about ECS hc 49usx quartz crystals	Datasheet	74In Stock	¥101.3 ¥80.2 ¥70.6 ¥66.9 View ¥62.3 ¥59 ¥56.3 ¥53.7	Min.: 1 Mult.: 1	9.8304 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 3.579545MHz 30pF ECS-35-30-4X ECS 1: ¥99.7 539In Stock Factory Special Order	Mfr. Part # ECS-35-30-4X Mouser Part # 520-ECS-35-30-4X Factory Special Order	ECS	Crystals 3.579545MHz 30pF Learn More about ECS hc 49usx quartz crystals	Datasheet	539In Stock	¥99.7 ¥78.6 ¥71.9 View ¥61 ¥58.8 ¥52.3	Min.: 1 Mult.: 1	3.579545 MHz	30 pF	30 PPM	50 PPM	HC-49/USX	- 10 C	+ 70 C	Radial	200 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 12.096MHz SERIES ECS-121-S-4X ECS 1: ¥104.6 31In Stock Factory Special Order	Mfr. Part # ECS-121-S-4X Mouser Part # 520-HCU1209-SX Factory Special Order	ECS	Crystals 12.096MHz SERIES Learn More about ECS hc 49usx quartz crystals	Datasheet	31In Stock	¥104.6 ¥82.2 View ¥74.4 ¥71.3 ¥68.3 ¥64.4 ¥61.5 ¥54.8	Min.: 1 Mult.: 1	12.096 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 15.0MHz 20pF -10C +70C ECS-150-20-4X ECS 1: ¥99.7 183In Stock Factory Special Order	Mfr. Part # ECS-150-20-4X Mouser Part # 520-HCU150-20-4X Factory Special Order	ECS	Crystals 15.0MHz 20pF -10C +70C Learn More about ECS hc 49usx quartz crystals	Datasheet	183In Stock	¥99.7 ¥78.6 ¥71.1 View ¥68.1 ¥65.3 ¥61.6 ¥58.8 ¥52.3	Min.: 1 Mult.: 1	15 MHz	20 pF	30 PPM	50 PPM	HC-49/USX	- 10 C	+ 70 C	Radial	40 Ohms	500 uW	11.35 mm	3.7 mm	3.5 mm	HCS-49USX	Bulk
Crystals 27MHz 18pF ECS-240-18-4X-F ECS 1: ¥104.6 158In Stock Factory Special Order	Mfr. Part # ECS-240-18-4X-F Mouser Part # 520-HCU2700-18X Factory Special Order	ECS	Crystals 27MHz 18pF Learn More about ECS hc 49usx quartz crystals	Datasheet	158In Stock	¥104.6 ¥82.2 ¥74.4 View ¥71.3 ¥68.3 ¥64.4 ¥61.5 ¥54.8	Min.: 1 Mult.: 1	27 MHz	18 pF	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial			11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 48MHz 20pF HC-49US ECS-480-20-4X ECS 1: ¥104.6 144In Stock Factory Special Order	Mfr. Part # ECS-480-20-4X Mouser Part # 520-HCU4800-20X Factory Special Order	ECS	Crystals 48MHz 20pF HC-49US Learn More about ECS hc 49usx quartz crystals	Datasheet	144In Stock	¥104.6 ¥82.2 ¥74.4 View ¥71.3 ¥68.3 ¥64.4 ¥61.5 ¥54.8	Min.: 1 Mult.: 1	48 MHz	20 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 CRYSTAL 9.545MHz ECS-95-S-4X ECS 1: ¥99.7 678In Stock Factory Special Order	Mfr. Part # ECS-95-S-4X Mouser Part # 520-HCU954-SX Factory Special Order	ECS	Crystals CRYSTAL 9.545MHz Learn More about ECS hc 49usx quartz crystals	Datasheet	678In Stock	¥99.7 ¥78.6 ¥71.1 ¥68.3 View ¥65.3 ¥61.6 ¥58.8 ¥52.3	Min.: 1 Mult.: 1	9.545 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 17.73MHz 18pF 50ppm -40C +85C ECS-177.3-18-4X-EN ECS 1: ¥112.9 1,000In Stock Factory Special Order	Mfr. Part # ECS-177.3-18-4X-EN Mouser Part # 520-177.3-18-4-EN Factory Special Order	ECS	Crystals 17.73MHz 18pF 50ppm -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	1,000In Stock	¥112.9 ¥89.2 ¥80.7 ¥77.4 View ¥74.2 ¥70.1 ¥66.8 ¥59.5	Min.: 1 Mult.: 1	17.734475 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 4MHz 20pF -40C +85C ECS-40-20-4X-DN-TR ECS 1: ¥132.9 579In Stock Factory Special Order	Mfr. Part # ECS-40-20-4X-DN-TR Mouser Part # 520-ECS-40-20-4XDN-T Factory Special Order	ECS	Crystals 4MHz 20pF -40C +85C Learn More about ECS hc 49usx quartz crystals	Datasheet	579In Stock	¥132.9 ¥103.5 ¥93.7 ¥90 View ¥86.2 ¥81.4 ¥77.6 ¥69.1	Min.: 1 Mult.: 1	4 MHz	20 pF	30 PPM	50 PPM	HC-49/USX	- 40 C	+ 85 C	Radial	150 Ohms	500 uW	11.35 mm	3.8 mm	3.5 mm	HCS-49USX
Crystals 16.257MHz SERIES ECS-162.5-S-4X ECS 1: ¥99.7 469In Stock Factory Special Order	Mfr. Part # ECS-162.5-S-4X Mouser Part # 520-HCU1625-SX Factory Special Order	ECS	Crystals 16.257MHz SERIES Learn More about ECS hc 49usx quartz crystals	Datasheet	469In Stock	¥99.7 ¥78.6 ¥71.1 View ¥68.3 ¥65.3 ¥61.6 ¥58.8 ¥52.3	Min.: 1 Mult.: 1	16.257 MHz	Series	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	40 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 19.6608MHz 20pF EX/TEMP HCU-49US ECS-196-20-4XDN ECS 1: ¥197.7 950In Stock Factory Special Order	Mfr. Part # ECS-196-20-4XDN Mouser Part # 520-HCU1966-20DNX Factory Special Order	ECS	Crystals 19.6608MHz 20pF EX/TEMP HCU-49US Learn More about ECS hc 49usx quartz crystals	Datasheet	950In Stock	¥197.7 ¥154.1 ¥147.7 ¥139.5 View ¥132.9 ¥128.1 ¥120.6 ¥110.1	Min.: 1 Mult.: 1	19.6608 MHz	20 pF	30 PPM	100 PPM	HC-49/US	- 40 C	+ 85 C	Radial	40 Ohms	500 uW	11.35 mm	4.65 mm	3.5 mm	HCS-49USX	Bulk
Crystals 21.47727MHz SERIES ECS-214-S-4X ECS 1: ¥104.6 70In Stock Factory Special Order	Mfr. Part # ECS-214-S-4X Mouser Part # 520-HCU2147-SX Factory Special Order	ECS	Crystals 21.47727MHz SERIES Learn More about ECS hc 49usx quartz crystals	Datasheet	70In Stock	¥104.6 ¥82.2 View ¥74.4 ¥71.3 ¥68.3 ¥64.4 ¥61.5 ¥54.8	Min.: 1 Mult.: 1	21.47727 MHz	Series	30 PPM	50 PPM	HC-49/US	- 10 C	+ 70 C	Radial	30 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