The Filter,radio Frequency Interfere, cataloged under National Stock Number 5915-01-138-9661, is classified within Federal Supply Class 5915 (Filters and Networks) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Hydraulics International, Inc. Dba Hydraulics International Inc. Government technical data includes 28 specifications, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5915-01-138-9661 |
| Primary Part Number | FC544A |
| Item Name | Filter,radio Frequency Interfere |
| FSC / FSG | 5915 / 59 — Filters and Networks |
| Manufacturer | Hydraulics International, Inc. Dba Hydraulics International Inc |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 4 UNTHREADED HOLE(S) LOCATION NOT OTHERWISE SPECIFIED |
| Inclosure Type | ENCASED |
| Distance Between Centerlines of Mounting Facilities Parallel to Body Length | 6.062 INCHES NOMINAL IN |
| Power Line Frequency Rating Per Function in Hertz | 400.0 3RD RADIO INTERFERENCE THIRD FUNCTION |
| Power Line Frequency Rating Per Function in Hertz | 400.0 1ST RADIO INTERFERENCE FIRST FUNCTION |
| Power Line Frequency Rating Per Function in Hertz | 400.0 2ND RADIO INTERFERENCE SECOND FUNCTION |
| Functional Terminal Type and Quantity | 3 THREADED STUD OUTPUT SECOND FUNCTION |
| Functional Terminal Type and Quantity | 1 CONNECTOR, RECEPTACLE INPUT FIRST FUNCTION |
| Source Impedance Rating Per Function | 50.0 OHMS 2ND RADIO INTERFERENCE SECOND FUNCTION |
| Source Impedance Rating Per Function | 50.0 OHMS 3RD RADIO INTERFERENCE THIRD FUNCTION |
| Source Impedance Rating Per Function | 50.0 OHMS 1ST RADIO INTERFERENCE FIRST FUNCTION |
| Vibration Resistance Range in Hertz | +10.0 TO 55.0 |
| Body Width | 3.420 INCHES NOMINAL IN |
| Maximum Voltage Drop Per Function | 1.5 VOLTS AC 2ND RADIO INTERFERENCE SECOND FUNCTION |
| Maximum Voltage Drop Per Function | 1.5 VOLTS AC 1ST RADIO INTERFERENCE FIRST FUNCTION |
| Maximum Voltage Drop Per Function | 1.5 VOLTS AC 3RD RADIO INTERFERENCE THIRD FUNCTION |
| Unthreaded Mounting Hole Diameter | 0.166 INCHES NOMINAL IN |
| Style Designator | RECTANGULAR TERMINAL/TERMINALS ON ADJACENT SURFACES |
| Body Length | 5.470 INCHES NOMINAL IN |
| Operating Voltage Rating and Type Per Function | 240.0 VOLTS AC 2ND RADIO INTERFERENCE SECOND FUNCTION |
| Operating Voltage Rating and Type Per Function | 240.0 VOLTS AC 1ST RADIO INTERFERENCE FIRST FUNCTION |
| Operating Voltage Rating and Type Per Function | 240.0 VOLTS AC 3RD RADIO INTERFERENCE THIRD FUNCTION |
| Operating Current Rating Per Function in Amps | 26.0 1ST RADIO INTERFERENCE FIRST FUNCTION |
| Operating Current Rating Per Function in Amps | 26.0 2ND RADIO INTERFERENCE SECOND FUNCTION |
| Operating Current Rating Per Function in Amps | 26.0 3RD RADIO INTERFERENCE THIRD FUNCTION |
| Operating Temp Range | -0.0 TO 65.0 CELSIUS DEGC |
| Load Impedance Per Function | 50.0 OHMS 2ND RADIO INTERFERENCE SECOND FUNCTION |
| Load Impedance Per Function | 50.0 OHMS 3RD RADIO INTERFERENCE THIRD FUNCTION |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| FC544A | Hydraulics International, Inc. Dba Hydraulics International Inc (USA) |
| E-1721 | Lindgren Rf Enclosures Inc Elmag Div (USA) |
| RF03129B | Ems Development Corporation Dba Ems Development Corp (USA) |
| M1364 | Mtk Electronics Inc (USA) |
| Reference | Meaning |
|---|---|
| 5003-4588R | 5/9 Secondary reference Spectrum Control, Inc. Div Api Technologies - Eis/wesson |
| RF3129B | 5/9 Secondary reference Ems Development Corporation Dba Ems Development Corp |
| 08P228138-01 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5915-01-138-9661 is a Filter,radio Frequency Interfere, manufactured by Hydraulics International, Inc. Dba Hydraulics International Inc, classified under FSC 5915, Filters and Networks. Status: active.
NSN 5915-01-138-9661 has 4 manufacturer part numbers on file: FC544A (Hydraulics International, Inc. Dba Hydraulics International Inc), E-1721 (Lindgren Rf Enclosures Inc Elmag Div), RF03129B (Ems Development Corporation Dba Ems Development Corp), M1364 (Mtk Electronics Inc).
Key specifications for FC544A: Mounting Facility Type and Quantity: 4 UNTHREADED HOLE(S) LOCATION NOT OTHERWISE SPECIFIED; Overall Height: 2.351 INCHES NOMINAL IN; Inclosure Type: ENCASED; Distance Between Centerlines of Mounting Facilities Parallel to Body Length: 6.062 INCHES NOMINAL IN. 28 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 5915-01-138-9661 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.