The Modulator Subassembly, cataloged under National Stock Number 1290-01-461-3928, is classified within Federal Supply Class 1290 (Miscellaneous Fire Control Equipment) of the Fire Control Equipment group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1290-01-461-3928 |
| Primary Part Number | 401-6903903 ITEM 36 |
| Item Name | Modulator Subassembly |
| FSC / FSG | 1290 / 12 — Miscellaneous Fire Control Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Component Type and Quantity | 9 ALARM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 401-6903903 ITEM 36 PRIMARY | Naval Sea Systems Command (USA) |
| TRI-D PRIMARY | Siemens Building Technologies Dba Siemens Fire Safety Division Div Siemens Building Technologies Inc. (USA) |
| Reference | Meaning |
|---|---|
| TRI-B6D | C/1 Advisory reference — outside the item-of-supply concept Siemens Industry Inc Div Corporate Headquarters |
| TRI-B6D | 5/9 Secondary reference Siemens Building Technologies Dba Siemens Fire Safety Division Div Siemens Building Technologies Inc. |
| TRI-B6D | 5/9 Secondary reference Cerberus Pyrotronics Inc |
NSN 1290-01-461-3928 is a Modulator Subassembly, manufactured by Naval Sea Systems Command, classified under FSC 1290, Miscellaneous Fire Control Equipment. Status: active.
NSN 1290-01-461-3928 has 2 manufacturer part numbers on file: 401-6903903 ITEM 36 (Naval Sea Systems Command), TRI-D (Siemens Building Technologies Dba Siemens Fire Safety Division Div Siemens Building Technologies Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5963-01-535-8062. Verify interchangeability with system specifications before substitution.
Key specifications for 401-6903903 ITEM 36: Component Type and Quantity: 9 ALARM; Special Features: FIRE AND FLOODING ALARM SYSTEM; End Item Identification: PANEL,ALARM F E/I FSCM 53711. 1 specification is documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.