PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

S4MSemiconductor Device,diode

Semtech Corporation · NSN 5961-00-988-3991 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-00-988-3991 — this item is cataloged by the U.S. Government under National Stock Number 5961-00-988-3991. Primary manufacturer part number: S4M.
Features
  • Semiconductor Device,diode — FSC 5961
  • Precious Material and Location: TERMINALS SILVER
  • Material: SILICON SEMICONDUCTOR
  • Terminal Type and Quantity: 2 UNINSULATED WIRE LEAD
  • Precious Material: SILVER
  • Maximum Operating Temp Per Measurement Point: 175.0 CELSIUS AMBIENT AIR DEGC
  • Overall Diameter: 0.135 INCHES NOMINAL IN
  • Voltage Rating in Volts Per Characteristic: 400.0 MAXIMUM REVERSE VOLTAGE, PEAK AND 280.0 MAXIMUM OFF-STATE VOLTAGE, RMS TOTAL
Applications
  • Circuit regulation and filtering
  • Signal conditioning
  • Power supply stabilization
  • Applications requiring Silicon Semiconductor construction
General Description

The Semiconductor Device,diode, cataloged under National Stock Number 5961-00-988-3991, 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 Semtech Corporation. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 6 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
NSN5961-00-988-3991
Primary Part NumberS4M
Item NameSemiconductor Device,diode
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerSemtech Corporation
StatusCANCELLED
Precious Material and LocationTERMINALS SILVER
MaterialSILICON SEMICONDUCTOR
Terminal Type and Quantity2 UNINSULATED WIRE LEAD
Precious MaterialSILVER
Maximum Operating Temp Per Measurement Point175.0 CELSIUS AMBIENT AIR DEGC
Overall Diameter0.135 INCHES NOMINAL IN
Voltage Rating in Volts Per Characteristic400.0 MAXIMUM REVERSE VOLTAGE, PEAK AND 280.0 MAXIMUM OFF-STATE VOLTAGE, RMS TOTAL
Mounting MethodTERMINAL
Features ProvidedHERMETICALLY SEALED CASE
Terminal Length1.206 INCHES NOMINAL IN
Current Rating Per Characteristic1.00 MICROAMPERES MAXIMUM REVERSE CURRENT, PEAK
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5340-00-034-7948SC4 INTERCHANGEABLE
Cap,protective,dust and Moisture
Tubing Seal Cap Div of Vsi Corp Sub of Fairchild Industries Inc
5961-00-045-9823153-0007-00 INTERCHANGEABLE
Semiconductor Device,diode
Tektronix, Inc.
6635-00-056-1007 INTERCHANGEABLE
Calibrator,sensitiv
3655-00-174-1726 INTERCHANGEABLE
Recharging Unit,carbon Dioxide,p
5935-00-201-8357SC4 INTERCHANGEABLE
Socket,plug-in Electronic Compon
Viking Technologies, Ltd.
5310-00-213-4827 INTERCHANGEABLE
Nut,plain,blind Rivet
5360-00-310-66322098 INTERCHANGEABLE
Spring,helical,compression
Westinghouse Air Brake Technologies Corp Dba Westinghouse Air Brake Technologies Corp
4320-00-398-9320BS-1193 PIECE 91 INTERCHANGEABLE
Rod,tail
Circor Naval Solutions Llc Dba Warren Pumps
5340-00-480-6054145A INTERCHANGEABLE
Key Blank
Ilco Unican Corp Dba Wolf Sales
5950-00-645-3602 INTERCHANGEABLE
Transformer,power
Cross-Reference Index
Part NumberManufacturer
101957-2 Sierra Networks Inc Sierracom Div (USA)
SC4 Semtech Corporation (USA)
LG4012 Itt Semiconductors a Division of International Telephone and Telegraph Corp (USA)
5961009883991 E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales
152-0066-01 Tektronix, Inc. (USA)
S4M PRIMARY Semtech Corporation (USA)
SS6106 Semtech Corporation (USA)
SC4 St-Semicon Inc (USA)
Related Parts
5340-00-034-7948INTERCHANGEABLE
CAP,PROTECTIVE,DUST AND MOISTURE
SC4
5961-00-045-9823INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
153-0007-00
6635-00-056-1007INTERCHANGEABLE
CALIBRATOR,SENSITIV
3655-00-174-1726INTERCHANGEABLE
RECHARGING UNIT,CARBON DIOXIDE,P
5935-00-201-8357INTERCHANGEABLE
SOCKET,PLUG-IN ELECTRONIC COMPON
SC4
5310-00-213-4827INTERCHANGEABLE
NUT,PLAIN,BLIND RIVET
5360-00-310-6632INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
2098
4320-00-398-9320INTERCHANGEABLE
ROD,TAIL
BS-1193 PIECE 91
5340-00-480-6054INTERCHANGEABLE
KEY BLANK
145A
5950-00-645-3602INTERCHANGEABLE
TRANSFORMER,POWER
5961-00-943-4084INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
60104-004
5950-01-220-6410INTERCHANGEABLE
COIL,RADIO FREQUENCY
11442428

Frequently Asked Questions

What is NSN 5961-00-988-3991?

NSN 5961-00-988-3991 is a Semiconductor Device,diode, manufactured by Semtech Corporation, classified under FSC 5961 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5961-00-988-3991?

NSN 5961-00-988-3991 has 8 cross-referenced part numbers: 101957-2 (Sierra Networks Inc Sierracom Div), SC4 (Semtech Corporation), LG4012 (Itt Semiconductors a Division of International Telephone and Telegraph Corp), 5961009883991 (E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales), 152-0066-01 (Tektronix, Inc.) and 3 more.

What NSN replaces 5961-00-988-3991?

There are 12 known substitutes for 5961-00-988-3991: 5340-00-034-7948, 5961-00-045-9823, 6635-00-056-1007 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of S4M?

Key specifications for S4M: Precious Material and Location: TERMINALS SILVER; Material: SILICON SEMICONDUCTOR; Terminal Type and Quantity: 2 UNINSULATED WIRE LEAD; Precious Material: SILVER. 12 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5961-00-988-3991 still in active supply?

NSN 5961-00-988-3991 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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