PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

SD303Transistor

Philips Semiconductors Inc · NSN 5961-01-065-0018 · FSC 5961 · No Item Name Available
Verified by PartsTable
NSN 5961-01-065-0018 — this item is cataloged by the U.S. Government under National Stock Number 5961-01-065-0018. Primary manufacturer part number: SD303.
Features
  • Transistor — FSC 5961
  • Maximum Operating Temp Per Measurement Point: 175.0 CELSIUS AMBIENT AIR DEGC
  • Voltage Rating in Volts Per Characteristic: 25.0 NOMINAL DRAIN TO SOURCE VOLTAGE
  • Current Rating Per Characteristic: 50.00 MILLIAMPERES MAXIMUM DRAIN CURRENT
  • Power Rating Per Characteristic: 1.2 WATTS MAXIMUM TOTAL POWER DISSIPATION
  • Semiconductor Material: SILICON
  • Terminal Type and Quantity: 4 UNINSULATED WIRE LEAD
  • Mounting Method: TERMINAL
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transistor, cataloged under National Stock Number 5961-01-065-0018, 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 Philips Semiconductors Inc. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5961-01-065-0018
Primary Part NumberSD303
Item NameTransistor
FSC / FSG5961 / 59 — No Item Name Available
ManufacturerPhilips Semiconductors Inc
StatusACTIVE
Maximum Operating Temp Per Measurement Point175.0 CELSIUS AMBIENT AIR DEGC
Voltage Rating in Volts Per Characteristic25.0 NOMINAL DRAIN TO SOURCE VOLTAGE
Current Rating Per Characteristic50.00 MILLIAMPERES MAXIMUM DRAIN CURRENT
Power Rating Per Characteristic1.2 WATTS MAXIMUM TOTAL POWER DISSIPATION
Semiconductor MaterialSILICON
Terminal Type and Quantity4 UNINSULATED WIRE LEAD
Mounting MethodTERMINAL
Terminal Length0.500 INCHES MINIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
2920-01-061-5767480216 INTERCHANGEABLE
Drive,engine,electrical Starter
Purolator Products Co Div Motor Components, Llc
Cross-Reference Index
Part NumberManufacturer
SD303 Philips Semiconductors Inc (USA)
SD303DC Topaz Semiconductor Inc Sub of Hytek Microsystems Inc (USA)
63A68A6091 Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA)
SD303DC Semi Processes Inc (USA)
Related Parts
2920-01-061-5767INTERCHANGEABLE
DRIVE,ENGINE,ELECTRICAL STARTER
480216

Frequently Asked Questions

What is NSN 5961-01-065-0018?

NSN 5961-01-065-0018 is a Transistor, manufactured by Philips Semiconductors Inc, classified under FSC 5961 (No Item Name Available). Status: active.

What are the part numbers for NSN 5961-01-065-0018?

NSN 5961-01-065-0018 has 4 cross-referenced part numbers: SD303 (Philips Semiconductors Inc), SD303DC (Topaz Semiconductor Inc Sub of Hytek Microsystems Inc), 63A68A6091 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), SD303DC (Semi Processes Inc).

What NSN replaces 5961-01-065-0018?

There is 1 known substitute for 5961-01-065-0018: 2920-01-061-5767. Verify interchangeability with system specifications before substitution.

What are the specifications of SD303?

Key specifications for SD303: Maximum Operating Temp Per Measurement Point: 175.0 CELSIUS AMBIENT AIR DEGC; Voltage Rating in Volts Per Characteristic: 25.0 NOMINAL DRAIN TO SOURCE VOLTAGE; Current Rating Per Characteristic: 50.00 MILLIAMPERES MAXIMUM DRAIN CURRENT; Power Rating Per Characteristic: 1.2 WATTS MAXIMUM TOTAL POWER DISSIPATION. 9 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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