PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

900540-1Tachometer,electrical,self-Gener

L3 Technologies, Inc. Dba Integrated Optical Systems · NSN 6680-01-111-4855 · FSC 6680 · No Item Name Available
Verified by PartsTable
NSN 6680-01-111-4855 — this item is cataloged by the U.S. Government under National Stock Number 6680-01-111-4855. Primary manufacturer part number: 900540-1.
Features
  • Tachometer,electrical,self-Gener — FSC 6680
  • Overall Diameter: 3.500 INCHES NOMINAL IN
  • 6 verified cross-references
  • Primary manufacturer: L3 Technologies, Inc. Dba Integrated Optical Systems
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Tachometer,electrical,self-Gener, cataloged under National Stock Number 6680-01-111-4855, is classified within Federal Supply Class 6680 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is L3 Technologies, Inc. Dba Integrated Optical Systems. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6680-01-111-4855
Primary Part Number900540-1
Item NameTachometer,electrical,self-Gener
FSC / FSG6680 / 66 — No Item Name Available
ManufacturerL3 Technologies, Inc. Dba Integrated Optical Systems
StatusACTIVE
Overall Diameter3.500 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5961-00-062-0208 INTERCHANGEABLE
Semiconductor Device,diode
4820-00-391-574290900540 INTERCHANGEABLE
Head,safety,pressure Relief
Kidde-Fenwal, Llc
4820-00-725-152790054-1 INTERCHANGEABLE
Disk,valve
Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok
5325-01-222-9006 INTERCHANGEABLE
Ring,retaining
Cross-Reference Index
Part NumberManufacturer
900540-1 L3 Technologies, Inc. Dba Integrated Optical Systems (USA)
402-97B Kollmorgen Corp Magnedyne Div (USA)
402-97E Kollmorgen Corp Magnedyne Div (USA)
90054-1 L3 Technologies, Inc. Dba Integrated Optical Systems (USA)
402-97E Kollmorgen Corp (USA)
900540 Contraves Inc (USA)
Related Parts
5961-00-062-0208INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
4820-00-391-5742INTERCHANGEABLE
HEAD,SAFETY,PRESSURE RELIEF
90900540
4820-00-725-1527INTERCHANGEABLE
DISK,VALVE
90054-1
5325-01-222-9006INTERCHANGEABLE
RING,RETAINING

Frequently Asked Questions

What is NSN 6680-01-111-4855?

NSN 6680-01-111-4855 is a Tachometer,electrical,self-Gener, manufactured by L3 Technologies, Inc. Dba Integrated Optical Systems, classified under FSC 6680 (No Item Name Available). Status: active.

What are the part numbers for NSN 6680-01-111-4855?

NSN 6680-01-111-4855 has 6 cross-referenced part numbers: 900540-1 (L3 Technologies, Inc. Dba Integrated Optical Systems), 402-97B (Kollmorgen Corp Magnedyne Div), 402-97E (Kollmorgen Corp Magnedyne Div), 90054-1 (L3 Technologies, Inc. Dba Integrated Optical Systems), 402-97E (Kollmorgen Corp) and 1 more.

What NSN replaces 6680-01-111-4855?

There are 4 known substitutes for 6680-01-111-4855: 5961-00-062-0208, 4820-00-391-5742, 4820-00-725-1527 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 900540-1?

Key specifications for 900540-1: Overall Height: 2.335 INCHES NOMINAL IN; Special Features: 39.0 OHMS DC RESISTANCE;360 RAD/SEC MAX OPERATING SPEED;86 VOLTS AT MAXOPERATING SPEED; Overall Diameter: 3.500 INCHES NOMINAL IN. 3 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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