PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1855-0209Transistor

Keysight Technologies Inc · NSN 5961-00-399-1173 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-00-399-1173 — this item is cataloged by the U.S. Government under National Stock Number 5961-00-399-1173. Primary manufacturer part number: 1855-0209.
Features
  • Transistor — FSC 5961
  • Maximum Operating Temp Per Measurement Point: 125.0 CELSIUS JUNCTION DEGC
  • Overall Diameter: 0.230 INCHES NOMINAL IN
  • Terminal Type and Quantity: 3 UNINSULATED WIRE LEAD
  • Internal Configuration: FIELD EFFECT
  • Power Rating Per Characteristic: 200.0 MILLIWATTS MAXIMUM TOTAL POWER DISSIPATION
  • Features Provided: HERMETICALLY SEALED CASE
  • Voltage Rating in Volts Per Characteristic: 15.0 MAXIMUM DRAIN TO SOURCE VOLTAGE
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transistor, cataloged under National Stock Number 5961-00-399-1173, 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 Keysight Technologies Inc. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 6 manufacturers, 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
NSN5961-00-399-1173
Primary Part Number1855-0209
Item NameTransistor
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerKeysight Technologies Inc
StatusACTIVE
Maximum Operating Temp Per Measurement Point125.0 CELSIUS JUNCTION DEGC
Overall Diameter0.230 INCHES NOMINAL IN
Terminal Type and Quantity3 UNINSULATED WIRE LEAD
Internal ConfigurationFIELD EFFECT
Power Rating Per Characteristic200.0 MILLIWATTS MAXIMUM TOTAL POWER DISSIPATION
Features ProvidedHERMETICALLY SEALED CASE
Voltage Rating in Volts Per Characteristic15.0 MAXIMUM DRAIN TO SOURCE VOLTAGE
Current Rating Per Characteristic3.00 MILLIAMPERES MINIMUM ZERO-GATE-VOLTAGE DRAIN CURRENT AND 9.00 MILLIAMPERES MAXIMUM ZERO-GATE-VOLTAGE DRAIN CURRENT
Semiconductor MaterialSILICON
Terminal Length0.500 INCHES MINIMUM IN
Mounting MethodTERMINAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5961-00-444-6656 INTERCHANGEABLE
Transistor
5961-01-062-9825 INTERCHANGEABLE
Transistor
Cross-Reference Index
Part NumberManufacturer
1855-0209 PRIMARY Keysight Technologies Inc (USA)
DMS 91004B Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings) (USA)
2N5461 Freescale Semiconductor, Inc. (USA)
1855-0209 Keysight Technologies, Inc. (USA)
1855-0209 Hewlett-Packard Company Dba HP (USA)
SPF582 Freescale Semiconductor, Inc. (USA)
2N5461 Ideal Semiconductor Inc (USA)
Related Parts
5961-00-444-6656INTERCHANGEABLE
TRANSISTOR
5961-01-062-9825INTERCHANGEABLE
TRANSISTOR

Frequently Asked Questions

What is NSN 5961-00-399-1173?

NSN 5961-00-399-1173 is a Transistor, manufactured by Keysight Technologies Inc, classified under FSC 5961 (No Item Name Available). Status: active.

What are the part numbers for NSN 5961-00-399-1173?

NSN 5961-00-399-1173 has 7 cross-referenced part numbers: 1855-0209 (Keysight Technologies Inc), DMS 91004B (Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings)), 2N5461 (Freescale Semiconductor, Inc.), 1855-0209 (Keysight Technologies, Inc.), 1855-0209 (Hewlett-Packard Company Dba HP) and 2 more.

What NSN replaces 5961-00-399-1173?

There are 2 known substitutes for 5961-00-399-1173: 5961-00-444-6656, 5961-01-062-9825. Verify interchangeability with system specifications before substitution.

What are the specifications of 1855-0209?

Key specifications for 1855-0209: Maximum Operating Temp Per Measurement Point: 125.0 CELSIUS JUNCTION DEGC; Overall Diameter: 0.230 INCHES NOMINAL IN; Terminal Type and Quantity: 3 UNINSULATED WIRE LEAD; Internal Configuration: FIELD EFFECT. 13 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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