MIL-SPEC Cross-Reference
Military Part
R303
Commercial Equivalent
HC49/US-SMD-20.000MHz
FunctionalMIL-PRF-55310ECS Inc.
Cross-Reference Details
| Military Part | R303 |
| Specification | MIL-PRF-55310 |
| Commercial Equivalent | HC49/US-SMD-20.000MHz |
| Manufacturer | ECS Inc. |
| Compatibility | Functional |
Technical Notes
Standard AT-cut crystal. Commercial SMD part matches frequency and load capacitance. May not meet full MIL thermal and stability specs without screening.
More Cross-References — MIL-PRF-55310
HC49USM10.000MABJ-UB→HC49US10.000MABJ-UB
TXCO · Pin-compatible
MXO45HS-3C-10M0000→MXO45HS-3C-10M0000
CTS · Similar
M55310/01-0001→HC49US
ECS Inc. · Similar
M55310/02-0050→ATS049B
Abracon · Functional
M55310/04-0100→FA-20H
Seiko Epson · Pin-compatible
M55310/03-0025→CX3225SB
Kyocera · Drop-in
HC49USM10.000MABJ-UB→HC49US-S10.000MABJ-UB
TXC Corporation · Functional
M55310/01-0001→HC49US-S-10.000-20-50-30-60-20
ECS Inc. · Functional
M55310/02-0050→ABLS-8.000MHZ-B2-T
Abracon · Similar
M55310/04-0020→NX3225SA-16.000000MHZ
NDK · Functional