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| PartNumber | ECS-40-S-18-TR | ECS-40-S-4X | ECS-40-S-1X |
| Description | Crystals CRYSTAL 4MHz | Crystals 4MHz SERIES | Crystals 4MHz SERIES |
| Manufacturer | ECS | ECS | ECS |
| Product Category | Crystals | Crystals | Crystals |
| RoHS | E | Y | Y |
| Termination Style | SMD/SMT | Radial | Radial |
| Package / Case | 11.8 mm x 5.5 mm | HC-49/US | HC-49 |
| Frequency | 4 MHz | 4 MHz | 4 MHz |
| Tolerance | 30 PPM | 30 PPM | 30 PPM |
| Frequency Stability | 50 PPM | 50 PPM | 50 PPM |
| Minimum Operating Temperature | - 10 C | - 10 C | - 10 C |
| Maximum Operating Temperature | + 70 C | + 70 C | + 70 C |
| Length | 11.8 mm | 11.35 mm | 11.35 mm |
| Width | 5.5 mm | 4.65 mm | 4.65 mm |
| Height | 2.5 mm | 3.5 mm | 13.46 mm |
| Series | CSM12 | HCS-49USX | HC49UX |
| Packaging | Reel | Bulk | Bulk |
| Type | SMD Quartz | Quartz Crystal | Quartz Crystal |
| Brand | ECS | ECS | ECS |
| Mounting Style | SMD/SMT | Through Hole | Through Hole |
| Product Type | Crystals | Crystals | Crystals |
| Factory Pack Quantity | 1000 | 200 | 100 |
| Subcategory | Crystals | Crystals | Crystals |
| Unit Weight | 0.011448 oz | 0.019667 oz | - |
| Load Capacitance | - | Series | Series |
| ESR | - | 150 Ohms | 100 Ohms |
| Drive Level | - | 500 uW | 1 mW |