PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

T2157Transistor

Lockheed Martin Corporation Div Lockheed Martin Information Systems & Global Solutions · NSN 5961-00-991-8799 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-00-991-8799 — this item is cataloged by the U.S. Government under National Stock Number 5961-00-991-8799. Primary manufacturer part number: T2157.
Features
  • Transistor — FSC 5961
  • Features Provided: HERMETICALLY SEALED CASE
  • Internal Configuration: JUNCTION CONTACT
  • Terminal Type and Quantity: 3 UNINSULATED WIRE LEAD
  • Semiconductor Material: SILICON
  • 1 verified cross-reference
  • Primary manufacturer: Lockheed Martin Corporation Div Lockheed Martin Information Systems & Global Solutions
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transistor, cataloged under National Stock Number 5961-00-991-8799, is classified within Federal Supply Class 5961 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Lockheed Martin Corporation Div Lockheed Martin Information Systems & Global Solutions. Government technical data includes 4 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. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5961-00-991-8799
Primary Part NumberT2157
Item NameTransistor
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerLockheed Martin Corporation Div Lockheed Martin Information Systems & Global Solutions
StatusACTIVE
Features ProvidedHERMETICALLY SEALED CASE
Internal ConfigurationJUNCTION CONTACT
Terminal Type and Quantity3 UNINSULATED WIRE LEAD
Semiconductor MaterialSILICON
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5985-00-840-7104341-1044G1 INTERCHANGEABLE
Dummy Load,electrical
Raytheon Company Dba Raytheon Co
6105-01-486-4921T-2157 INTERCHANGEABLE
Motor,torque
Kollmorgen Corp
Cross-Reference Index
Part NumberManufacturer
T2157 Lockheed Martin Corporation Div Lockheed Martin Information Systems & Global Solutions (USA)
Related Parts
5985-00-840-7104INTERCHANGEABLE
DUMMY LOAD,ELECTRICAL
341-1044G1
6105-01-486-4921INTERCHANGEABLE
MOTOR,TORQUE
T-2157

Frequently Asked Questions

What is NSN 5961-00-991-8799?

NSN 5961-00-991-8799 is a Transistor, manufactured by Lockheed Martin Corporation Div Lockheed Martin Information Systems & Global Solutions, classified under FSC 5961 (No Item Name Available). Status: active.

What are the part numbers for NSN 5961-00-991-8799?

NSN 5961-00-991-8799 has 1 cross-referenced part number: T2157 (Lockheed Martin Corporation Div Lockheed Martin Information Systems & Global Solutions).

What NSN replaces 5961-00-991-8799?

There are 2 known substitutes for 5961-00-991-8799: 5985-00-840-7104, 6105-01-486-4921. Verify interchangeability with system specifications before substitution.

What are the specifications of T2157?

Key specifications for T2157: Features Provided: HERMETICALLY SEALED CASE; Internal Configuration: JUNCTION CONTACT; Terminal Type and Quantity: 3 UNINSULATED WIRE LEAD; Semiconductor Material: SILICON. 5 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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