PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

LD1-138Semiconductor Devices,unitized

Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp · NSN 5961-00-238-3663 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-00-238-3663 — this item is cataloged by the U.S. Government under National Stock Number 5961-00-238-3663. Primary manufacturer part number: LD1-138.
Features
  • Semiconductor Devices,unitized — FSC 5961
  • Terminal Circle Diameter: 0.200 INCHES NOMINAL IN
  • Terminal Length: 0.500 INCHES MINIMUM IN
  • Joint Electronic Device Engineering Council/jedec/case Outline Designation: TO-99
  • Overall Diameter: 0.335 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN
  • Features Provided: HERMETICALLY SEALED CASE
  • Component Name and Quantity: 2 TRANSISTOR
  • Mounting Method: TERMINAL
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Semiconductor Devices,unitized, cataloged under National Stock Number 5961-00-238-3663, 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 Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 19 commercial cross-references from 15 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5961-00-238-3663
Primary Part NumberLD1-138
Item NameSemiconductor Devices,unitized
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerNorthrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
StatusCANCELLED
Terminal Circle Diameter0.200 INCHES NOMINAL IN
Terminal Length0.500 INCHES MINIMUM IN
Joint Electronic Device Engineering Council/jedec/case Outline DesignationTO-99
Overall Diameter0.335 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN
Features ProvidedHERMETICALLY SEALED CASE
Component Name and Quantity2 TRANSISTOR
Mounting MethodTERMINAL
Current Rating Per Characteristic50.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC ALL TRANSISTOR
Power Rating Per Characteristic600.0 MILLIWATTS MAXIMUM TOTAL DEVICE DISSIPATION ALL TRANSISTOR
Terminal Type and Quantity6 UNINSULATED WIRE LEAD
Semiconductor MaterialSILICON ALL TRANSISTOR
Voltage Rating in Volts Per Characteristic15.0 MAXIMUM COLLECTOR TO EMITTER VOLTAGE/STATIC/BASE OPEN AND 30.0 MAXIMUM COLLECTOR TO BASE VOLTAGE, DC AND 3.0 MAXIMUM EMITTER TO BASE VOLTAGE, DC ALL SEMICONDUCTOR
Transfer Ratio50.0 NOMINAL STATIC FORWARD CURRENT TRANSFER RATIO, COMMON-EMITTER ALL TRANSISTOR
Maximum Operating Temp Per Measurement Point200.0 CELSIUS JUNCTION DEGC
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 11
5935-00-238-3711710003-126 INTERCHANGEABLE
Adapter,connector
Raytheon Company Div Rmd Strategic
5935-00-238-3712710003-127 INTERCHANGEABLE
Backshell,electrical Connector
Raytheon Company Div Rmd Strategic
5961-00-499-7379301956 INTERCHANGEABLE
Semiconductor Devices,unitized
Northrop Grumman Corp Electronic Systems Defensive System Div
5961-00-517-6205466690-1 INTERCHANGEABLE
Semiconductor Devices,unitized
Raytheon Company Dba Raytheon Co
5935-00-779-4532752671-5 INTERCHANGEABLE
Socket,plug-in Electronic Compon
Lockheed Martin Corporation Div Rms - Mitchel Field
6220-00-961-0783 INTERCHANGEABLE
Spotlight
5330-01-024-23113119BN INTERCHANGEABLE
Packing,preformed
Betts Industries, Inc.
5961-01-096-8315975078-1 INTERCHANGEABLE
Semiconductor Devices,unitized
Raytheon Company Dba Raytheon Co
4820-01-276-1829 INTERCHANGEABLE
Valve,vacuum Regulating
4820-01-368-118415-0092 INTERCHANGEABLE
Valve,vacuum Regulating
Gardner Denver Nash Llc Dba Gardner Denver Engineered Products Group Div Gardner Denver Nash
Cross-Reference Index
Part NumberManufacturer
LD1-138 Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA)
134621-0000 Thales Usa, Inc. Div Air Mobility Solutions ("ams") (USA)
150-092 Systron-Donner Corp Microwave/instrument Div (USA)
HP13615 Fairchild Semiconductor Corp (USA)
MD918A Freescale Semiconductor, Inc. (USA)
SD2717H Freescale Semiconductor, Inc. (USA)
860001-138 Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA)
01265656 Thales Deutschland Gmbh (DEU)
NP13196 Fairchild Semiconductor Corp (USA)
B162500-0000 Butler National Corp (USA)
200934-701 Bae Systems Information and Electronic Systems Integration Inc. Dba Bae Systems (USA)
85801200-01 General Dynamics Information Systems Inc. Dba General Dynamics Advanced Information Systems (USA)
5L.5412.001.35 Hensoldt Sensors Gmbh Div Seps (DEU)
SA2661 Telcom Semiconductor Inc (USA)
162500-000000 Butler National Corp (USA)
162500-0000 Leonardo Us Cyber and Security Solutions, Llc (USA)
014-850 Ampex Systems Corp (USA)
01265656 Thales Dms France SAS (FRA)
150-092 Autek Systems Corp (USA)
Related Parts
5935-00-238-3711INTERCHANGEABLE
ADAPTER,CONNECTOR
710003-126
5935-00-238-3712INTERCHANGEABLE
BACKSHELL,ELECTRICAL CONNECTOR
710003-127
5961-00-499-7379INTERCHANGEABLE
SEMICONDUCTOR DEVICES,UNITIZED
301956
5961-00-517-6205INTERCHANGEABLE
SEMICONDUCTOR DEVICES,UNITIZED
466690-1
5935-00-779-4532INTERCHANGEABLE
SOCKET,PLUG-IN ELECTRONIC COMPON
752671-5
6220-00-961-0783INTERCHANGEABLE
SPOTLIGHT
5330-01-024-2311INTERCHANGEABLE
PACKING,PREFORMED
3119BN
5961-01-096-8315INTERCHANGEABLE
SEMICONDUCTOR DEVICES,UNITIZED
975078-1
4820-01-276-1829INTERCHANGEABLE
VALVE,VACUUM REGULATING
4820-01-368-1184INTERCHANGEABLE
VALVE,VACUUM REGULATING
15-0092
4130-01-458-8326INTERCHANGEABLE
POSI-VAC STARTER KI
150092

Frequently Asked Questions

What is NSN 5961-00-238-3663?

NSN 5961-00-238-3663 is a Semiconductor Devices,unitized, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp, classified under FSC 5961 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5961-00-238-3663?

NSN 5961-00-238-3663 has 19 cross-referenced part numbers: LD1-138 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp), 134621-0000 (Thales Usa, Inc. Div Air Mobility Solutions ("ams")), 150-092 (Systron-Donner Corp Microwave/instrument Div), HP13615 (Fairchild Semiconductor Corp), MD918A (Freescale Semiconductor, Inc.) and 14 more.

What NSN replaces 5961-00-238-3663?

There are 11 known substitutes for 5961-00-238-3663: 5935-00-238-3711, 5935-00-238-3712, 5961-00-499-7379 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of LD1-138?

Key specifications for LD1-138: Terminal Circle Diameter: 0.200 INCHES NOMINAL IN; Terminal Length: 0.500 INCHES MINIMUM IN; Joint Electronic Device Engineering Council/jedec/case Outline Designation: TO-99; Overall Diameter: 0.335 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN. 16 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5961-00-238-3663 still in active supply?

NSN 5961-00-238-3663 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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