The R491 is a the manufacturer industrial component. Key specifications include phase: SINGLE, unit_type: STANDARD, body_length: 1.000 INCHES NOMINAL IN, overall_width: 17.500 INCHES NOMINAL IN, rating_method: ELECTRICAL SINGLE COMPONENT SINGLE WINDING, inclosure_type: FULLY INCLOSED. This product is currently in active production with full OEM support.
This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6625-00-455-6768, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.
Verify compatibility with your specific system configuration before ordering.
| phase | SINGLE |
| unit_type | STANDARD |
| body_length | 1.000 INCHES NOMINAL IN |
| overall_width | 17.500 INCHES NOMINAL IN |
| rating_method | ELECTRICAL SINGLE COMPONENT SINGLE WINDING |
| inclosure_type | FULLY INCLOSED |
| overall_height | 7.000 INCHES NOMINAL IN |
| overall_length | 19.000 INCHES NOMINAL IN |
| inductance_type | FIXED |
| mounting_method | THREADED HOLE(S) SINGLE GROUP |
| frequency_rating | 48.0 HERTZ MINIMUM AND 440.0 HERTZ MAXIMUM |
| winding_quantity | 1 SINGLE COMPONENT |
| NSN | 6625-00-455-6768 |
| FREQUENCY RATING | 48.0 HERTZ MINIMUM AND 440.0 HERTZ MAXIMUM |
| FREQUENCY CALIBRATION ACCURACY RANGE IN PERCENT | -3.0 TO 3.0 |
| INPUT IMPEDANCE RATING | 50.0 OHMS NOMINAL |
| FURNISHED ITEMS AND QUANTITY | 6 FT BNC CABLE,50 OHM MINATURE COAX-1.6 FT N CABLE,RG 223/U COAX-1,2 FT TNC CABLE,RG223/U COAX-1,12.4 TO 18 GHZ WAVE GUIDE MIXER-1;18 TO 26.5 GHZ WAVE GUIDE MIXER-1;26.5 TO 40.0 GHZ WAVE GUIDE MIXER-1;20 DB ATTENTUATOR-1;40 DB ATTENTUATOR-1;BNC MALE TO N FEMALE ADAPTERS-2;BNC FEMALE TO N MALE ADAPTERS-2;WAVE GUIDE MIXER ADAPTER-1;POWER CORD-1;3 TO 2 WIRE ADAPTER-1;BLUE LIGHT FILTER-1;CLEAR CRT PROTECTOR PLATE-1;ORNAMENTAL RING-1;MESH FILTER-1;ONE AMPERE FUSES-2;1/2 AMPERE FUSE-1;FRONT COVER-1;INSTRUCTIONAL MANUAL-2 GHz |
| OVERALL HEIGHT | 7.000 INCHES NOMINAL IN |
| UNIT TYPE | STANDARD |
| FREQUENCY CHANNEL QUANTITY | 8 |
| OVERALL LENGTH | 19.000 INCHES NOMINAL IN |
| CATHODE RAY TUBE DISPLAYED INFORMATION | FREQUENCY DIFFERENCES |
| MOUNTING METHOD | RACK |