PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

40312Transistor

L3 Technologies, Inc. Div Communication Systems-East · NSN 5961-00-078-6727 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-00-078-6727 — this item is cataloged by the U.S. Government under National Stock Number 5961-00-078-6727. Primary manufacturer part number: 40312.
Features
  • Transistor — FSC 5961
  • Internal Configuration: JUNCTION CONTACTJUNCTION CONTACT
  • Semiconductor Material: SILICONSILICON
  • Power Rating Per Characteristic: 166.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION166.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION
  • Overall Diameter: 0.620 INCHES MAXIMUM0.620 INCHES MAXIMUM IN
  • Terminal Type and Quantity: 2 UNINSULATED WIRE LEAD AND 2 UNINSULATED WIRE LEAD AND 1 CASE1 CASE
  • Current Rating Per Characteristic: 4.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC AND 4.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC AND 2.00 AMPERES MAXIMUM BASE CURRENT, DC2.00 AMPERES MAXIMUM BASE CURRENT, DC
  • Electrode Internally-Electrically Connected to Case: COLLECTORCOLLECTOR
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transistor, cataloged under National Stock Number 5961-00-078-6727, 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 L3 Technologies, Inc. Div Communication Systems-East. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 13 commercial cross-references from 12 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5961-00-078-6727
Primary Part Number40312
Item NameTransistor
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerL3 Technologies, Inc. Div Communication Systems-East
StatusCANCELLED
Internal ConfigurationJUNCTION CONTACTJUNCTION CONTACT
Semiconductor MaterialSILICONSILICON
Power Rating Per Characteristic166.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION166.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION
Overall Diameter0.620 INCHES MAXIMUM0.620 INCHES MAXIMUM IN
Terminal Type and Quantity2 UNINSULATED WIRE LEAD AND 2 UNINSULATED WIRE LEAD AND 1 CASE1 CASE
Current Rating Per Characteristic4.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC AND 4.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC AND 2.00 AMPERES MAXIMUM BASE CURRENT, DC2.00 AMPERES MAXIMUM BASE CURRENT, DC
Electrode Internally-Electrically Connected to CaseCOLLECTORCOLLECTOR
Maximum Operating Temp Per Measurement Point200.0 CELSIUS JUNCTION200.0 CELSIUS JUNCTION DEGC
Features ProvidedHERMETICALLY SEALED CASEHERMETICALLY SEALED CASE
Mounting Facility Quantity22
Mounting MethodUNTHREADED HOLE(S)
Voltage Rating in Volts Per Characteristic2.5 MAXIMUM BREAKDOWN VOLTAGE, EMITTER-TO-BASE, COLLECTOR OPEN AND 2.5 MAXIMUM BREAKDOWN VOLTAGE, EMITTER-TO-BASE, COLLECTOR OPEN AND 60.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-EMITTER, BASE OPEN60.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-EMITTER, BASE OPEN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
3040-00-099-006340312 INTERCHANGEABLE
Housing,mechanical Drive
L3harris Technologies, Inc Div Space & Airborne Systems
3110-00-100-0328563 INTERCHANGEABLE
Cup,tapered Roller Bearing
The Timken Corporation
2530-00-233-65351-8142 INTERCHANGEABLE
Brake Assembly,mech
Pdi Ground Support Systems, Inc.
5120-00-287-415141-12MM INTERCHANGEABLE
Socket,socket Wrench
Wright Tool Co
5330-00-292-396318142 INTERCHANGEABLE
Packing Material
Dana Automotive Systems Group, Llc Dba Dana Sealing Products
5895-00-318-1303 INTERCHANGEABLE
Detecting Head
5330-00-412-990040312 INTERCHANGEABLE
Gasket
Rubbercraft Corporation of California, Ltd. Dba Rubbercraft Corp
3110-00-554-52386206ZMAX INTERCHANGEABLE
Bearing,ball,annular
Naval Ship Systems Command
5325-00-598-1178271624PC3 INTERCHANGEABLE
Ring,retaining
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
4730-00-618-7617 INTERCHANGEABLE
Adapter,straight,pipe to Tube
Cross-Reference Index
Part NumberManufacturer
40312 Rca Corp Distribution and Special Products (USA)
18-142 Raytheon Company Div Corp (USA)
40312 Lockheed Martin Corporation Dba Lockheed Martin Div Lockheed Martin (USA)
40312A Adelco Elektronik Gmbh (DEU)
262804 Gould Instrument Systems Inc (USA)
825-002 Liftruck Parts (GBR)
262804 Lds Test and Measurement Llc (USA)
40312 PRIMARY L3 Technologies, Inc. Div Communication Systems-East (USA)
825-002 A V M Ferrograph (GBR)
40312 Adelco Elektronik Gmbh (DEU)
TG54 Keithley Instruments, Llc (USA)
40312 Freescale Semiconductor, Inc. (USA)
3003012 S T C International Marine Ltd (GBR)
Related Parts
3040-00-099-0063INTERCHANGEABLE
HOUSING,MECHANICAL DRIVE
40312
3110-00-100-0328INTERCHANGEABLE
CUP,TAPERED ROLLER BEARING
563
2530-00-233-6535INTERCHANGEABLE
BRAKE ASSEMBLY,MECH
1-8142
5120-00-287-4151INTERCHANGEABLE
SOCKET,SOCKET WRENCH
41-12MM
5330-00-292-3963INTERCHANGEABLE
PACKING MATERIAL
18142
5895-00-318-1303INTERCHANGEABLE
DETECTING HEAD
5330-00-412-9900INTERCHANGEABLE
GASKET
40312
3110-00-554-5238INTERCHANGEABLE
BEARING,BALL,ANNULAR
6206ZMAX
5325-00-598-1178INTERCHANGEABLE
RING,RETAINING
271624PC3
4730-00-618-7617INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO TUBE
5845-00-784-5634INTERCHANGEABLE
PULLEY,POSITIVE DRI
18142
2995-00-909-9944INTERCHANGEABLE
NECK,VALVE
18142

Frequently Asked Questions

What is NSN 5961-00-078-6727?

NSN 5961-00-078-6727 is a Transistor, manufactured by L3 Technologies, Inc. Div Communication Systems-East, classified under FSC 5961 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5961-00-078-6727?

NSN 5961-00-078-6727 has 13 cross-referenced part numbers: 40312 (Rca Corp Distribution and Special Products), 18-142 (Raytheon Company Div Corp), 40312 (Lockheed Martin Corporation Dba Lockheed Martin Div Lockheed Martin), 40312A (Adelco Elektronik Gmbh), 262804 (Gould Instrument Systems Inc) and 8 more.

What NSN replaces 5961-00-078-6727?

There are 12 known substitutes for 5961-00-078-6727: 3040-00-099-0063, 3110-00-100-0328, 2530-00-233-6535 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 40312?

Key specifications for 40312: Internal Configuration: JUNCTION CONTACTJUNCTION CONTACT; Semiconductor Material: SILICONSILICON; Power Rating Per Characteristic: 166.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION166.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION; Overall Diameter: 0.620 INCHES MAXIMUM0.620 INCHES MAXIMUM IN. 14 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5961-00-078-6727 still in active supply?

NSN 5961-00-078-6727 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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