PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

25AGenerator,thermoelectric

Geotech Systems Llc · NSN 6115-00-539-0227 · FSC 6115 · No Item Name Available
Verified by PartsTable
NSN 6115-00-539-0227 — this item is cataloged by the U.S. Government under National Stock Number 6115-00-539-0227. Primary manufacturer part number: 25A.
Features
  • Generator,thermoelectric — FSC 6115
  • FSC Application Data: PROJECT NO. 104,B/20 PROGRAM,SPECIAL METEOROLOGICAL EQUIPMENT
  • General Characteristics Item Description: RADIOISOTOPE,33WATTS,2.6 VOLTS SENTINEL MODEL NOTED IN TA136
  • 1 verified cross-reference
  • Primary manufacturer: Geotech Systems Llc
Applications
  • Electrical power distribution
  • Generator and power systems
  • Industrial motor installations
General Description

The Generator,thermoelectric, cataloged under National Stock Number 6115-00-539-0227, is classified within Federal Supply Class 6115 (No Item Name Available) of the Electric Wire, Power, and Distribution Equipment group. The primary manufacturer of record is Geotech Systems Llc. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6115-00-539-0227
Primary Part Number25A
Item NameGenerator,thermoelectric
FSC / FSG6115 / 61 — No Item Name Available
ManufacturerGeotech Systems Llc
StatusACTIVE
FSC Application DataPROJECT NO. 104,B/20 PROGRAM,SPECIAL METEOROLOGICAL EQUIPMENT
General Characteristics Item DescriptionRADIOISOTOPE,33WATTS,2.6 VOLTS SENTINEL MODEL NOTED IN TA136
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6240-00-143-3059 INTERCHANGEABLE
Lamp,incandescent
6240-00-155-8651 INTERCHANGEABLE
Lamp,incandescent
5905-00-173-5681 INTERCHANGEABLE
Resistor,adjustable
5905-00-186-21932LA43D2500 INTERCHANGEABLE
Resistor,adjustable
Ohmite Holding, L.l.c. Dba Ohmite Manufacturing
5940-00-199-962125A INTERCHANGEABLE
Terminal Board
Lucent Technologies Inc Corporate Headquarters
5905-00-279-5427WL25A3000WITHPUSH1 INTERCHANGEABLE
Resistor,adjustable
Ward Leonard Ct Llc
5905-00-284-33380366-50P0RM5 INTERCHANGEABLE
Resistor,adjustable
Ohmite Holding, L.l.c. Dba Ohmite Manufacturing
5340-00-290-724325A INTERCHANGEABLE
Cap-Plug,protective,dust and Moi
Caplugs Llc Dba Mokon Div Caplugs
6240-00-299-768517-6760-025-200 INTERCHANGEABLE
Lamp,incandescent
Chief of Engineers Dept of Army
5325-00-489-306525A INTERCHANGEABLE
Grommet,nonmetallic
Pierce-Roberts Rubber Company Dba Pierce Roberts Rubber
Cross-Reference Index
Part NumberManufacturer
25A PRIMARY Geotech Systems Llc (USA)
Related Parts
6240-00-143-3059INTERCHANGEABLE
LAMP,INCANDESCENT
6240-00-155-8651INTERCHANGEABLE
LAMP,INCANDESCENT
5905-00-173-5681INTERCHANGEABLE
RESISTOR,ADJUSTABLE
5905-00-186-2193INTERCHANGEABLE
RESISTOR,ADJUSTABLE
2LA43D2500
5940-00-199-9621INTERCHANGEABLE
TERMINAL BOARD
25A
5905-00-279-5427INTERCHANGEABLE
RESISTOR,ADJUSTABLE
WL25A3000WITHPUSH1
5905-00-284-3338INTERCHANGEABLE
RESISTOR,ADJUSTABLE
0366-50P0RM5
5340-00-290-7243INTERCHANGEABLE
CAP-PLUG,PROTECTIVE,DUST AND MOI
25A
6240-00-299-7685INTERCHANGEABLE
LAMP,INCANDESCENT
17-6760-025-200
5325-00-489-3065INTERCHANGEABLE
GROMMET,NONMETALLIC
25A
5130-00-496-6072INTERCHANGEABLE
VALVE,AIR CONTROL
2-5A
6625-00-543-9481INTERCHANGEABLE
DETECTING ELEMENT,DIRECTIONAL CO
25A

Frequently Asked Questions

What is NSN 6115-00-539-0227?

NSN 6115-00-539-0227 is a Generator,thermoelectric, manufactured by Geotech Systems Llc, classified under FSC 6115 (No Item Name Available). Status: active.

What are the part numbers for NSN 6115-00-539-0227?

NSN 6115-00-539-0227 has 1 cross-referenced part number: 25A (Geotech Systems Llc).

What NSN replaces 6115-00-539-0227?

There are 12 known substitutes for 6115-00-539-0227: 6240-00-143-3059, 6240-00-155-8651, 5905-00-173-5681 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 25A?

Key specifications for 25A: FSC Application Data: PROJECT NO. 104,B/20 PROGRAM,SPECIAL METEOROLOGICAL EQUIPMENT; General Characteristics Item Description: RADIOISOTOPE,33WATTS,2.6 VOLTS SENTINEL MODEL NOTED IN TA136. 2 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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