NSN 5895-01-603-6978 · NIIN 016036978 · Part number 87-399-RB2U
Microsemi Frequency and Time Corp · FSC 5895 — Miscellaneous Communication Equipment · FSG 58 — Communication, Detection, and Coherent Radiation Equipment · CAGE 1B0C5
Government record, cited
NSN 5895-01-603-6978 — this item is cataloged by the U.S. Government under National Stock Number 5895-01-603-6978. Manufacturer of record part number: 87-399-RB2U.
Also searched as5895-01-603-6978 ·
5895016036978 ·
NIIN 016036978 ·
01-603-6978 ·
FSC 5895 Miscellaneous Communication Equipment · CAGE 1B0C5 · 87-399-RB2U
Manufacturer of record: Microsemi Frequency and Time Corp
Identification
NSN: 5895-01-603-6978
NIIN: 016036978
FSC: 5895 — Miscellaneous Communication Equipment
FSG: 58 — Communication, Detection, and Coherent Radiation Equipment
Primary part number: 87-399-RB2U
Manufacturer: Microsemi Frequency and Time Corp
General Description
The Modulator-Oscillator, cataloged under National Stock Number 5895-01-603-6978, is classified within Federal Supply Class 5895 (Miscellaneous Communication Equipment) of the Communication, Detection, and Coherent Radiation Equipment group. The manufacturer of record is Microsemi Frequency and Time Corp. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Other items in FSC 5895 — Miscellaneous Communication Equipment
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5895-00-000-0116
5895-00-000-0116 · Item name not on file
5895-00-001-1613
DIVIDER,POWER,RADIO FREQUENCY
5895-00-001-1816
DIVIDER,POWER,RADIO FREQUENCY
5895-00-001-1867
5895-00-001-1867 · Item name not on file
5895-00-001-2457
DUPLEXER SUBASSEMBLY
5895-00-001-2722
5895-00-001-2722 · Item name not on file
5895-00-001-2735
MIXER STAGE,FREQUENCY
5895-00-001-2738
MODULATOR SUBASSEMBLY
Frequently Asked Questions
What is NSN 5895-01-603-6978?
NSN 5895-01-603-6978 is a Modulator-Oscillator, manufactured by Microsemi Frequency and Time Corp, classified under FSC 5895, Miscellaneous Communication Equipment. Status: active.
What part numbers are listed for NSN 5895-01-603-6978?
NSN 5895-01-603-6978 has 1 manufacturer part number on file: 87-399-RB2U (Microsemi Frequency and Time Corp).
What are the specifications of 87-399-RB2U?
Key specifications for 87-399-RB2U: Special Features: ITEM USED IN A RUBIDIUM GPS SYSTEM,ACCURACY:FUCTION OF INPUT SYNCHRONIZATION SOURCE(GPS,IRIG,IPPS,HAVE QUICK),STABILITY:4X10-11 @ 1 SEC,4X10-12 @1000SEC,1X10-12 PER 24 HOURS,TEMPERATURE:3X10-18,OVER 0 DEGREES CELSIUS TO 50 DEGREES CELSIUS WHEN NOT LOCKED TO REFERENCE,DRIFT RATE:5X10-11 PER MONTH (720 HOURS). 0 specifications are documented in the U.S. Government catalog.
Is NSN 5895-01-603-6978 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.