The Capacitor Signal, cataloged under National Stock Number 5840-01-485-1878, is classified within Federal Supply Class 5840 (Radar Equipment, Except Airborne) of the Communication, Detection, and Coherent Radiation Equipment group. The manufacturer of record is Infinite Electronics International, Inc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5840-01-485-1878 |
| Primary Part Number | IS-MPT-75 |
| Item Name | Capacitor Signal |
| FSC / FSG | 5840 / 58 — Radar Equipment, Except Airborne |
| Manufacturer | Infinite Electronics International, Inc |
| Status | ACTIVE |
| General Characteristics Item Description | SOLID STATE TWISTED PAIR PROTECTOR; PROTECT TELEPHONE TRUNKS; OPERATING VOLTAGE - PLUS/MINUS 75 VOLTS; CAPACITANCE - 5000 PF; MAX SURGE CURRENT - 4KA; OPERATING TEMP - MINUS 25, PLUS 25 DEG C DEGC |
| 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 |
|---|---|
| IS-MPT-75 PRIMARY | Infinite Electronics International, Inc (USA) |
| Reference | Meaning |
|---|---|
| IS-MPT-75 | 3/9 Design control — primary reference Polyphaser Corporation |
NSN 5840-01-485-1878 is a Capacitor Signal, manufactured by Infinite Electronics International, Inc, classified under FSC 5840, Radar Equipment, Except Airborne. Status: active.
NSN 5840-01-485-1878 has 1 manufacturer part number on file: IS-MPT-75 (Infinite Electronics International, Inc).
Key specifications for IS-MPT-75: General Characteristics Item Description: SOLID STATE TWISTED PAIR PROTECTOR; PROTECT TELEPHONE TRUNKS; OPERATING VOLTAGE - PLUS/MINUS 75 VOLTS; CAPACITANCE - 5000 PF; MAX SURGE CURRENT - 4KA; OPERATING TEMP - MINUS 25, PLUS 25 DEG C DEGC. 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.