ECS Inc. · timing · case HC-49/U
| frequency | 4e+06 (4 M) |
|---|---|
| frequency_tolerance | 3e-05 (30 µ) |
| frequency_stability | 5e-05 (50 µ) |
| esr | 100 (100) |
| device_type | oscillator |
| technology | quartzCrystal |
| output_type | none |
| mode | fundamental |
Report a problem with this part (opens a public GitHub issue) · data quality
Best 5 of 62 scored candidates from other manufacturers (catalogue version 2705ed3e49cf9156).
This part's own record is incomplete, so no substitute is graded recommended.
| Part | Manufacturer | Grade | Direction | Footprint |
|---|---|---|---|---|
| AB-4.000MHZ-20-B4Z | Abracon | minor_review | equivalent | fits |
| AB-4.000MHZ-B2 | Abracon | minor_review | mixed | fits |
| 830003068B | Würth Elektronik | minor_review | upgrade | fits |
| 830003071 | Würth Elektronik | minor_review | equivalent | different_case |
| 830011300 | Würth Elektronik | minor_review | equivalent | different_case |
Grades: drop_in, minor_review, major_review, redesign, no_substitute. “unverified” means a record is silent on that point, not that the part passed it. full cross-reference as JSON.
Values are SI base units; a spec not listed is not stated in the part's record (it is not zero). Machine access: MCP at /mcp, /llms.txt. Open catalogue — Kelvin.