Datasheets
2N491 by:
Central Semiconductor Corp
Advanced Semiconductor Inc
Allegro MicroSystems LLC
Boca Semiconductor Inc
Central Semiconductor Corp
Continental Device India Ltd
Crimson Semiconductor Inc
Defense Logistics Agency
Digitron Semiconductors
ECS International Inc
Fairchild Semiconductor Corporation
Freescale Semiconductor
General Diode Corp
General Electric Company
General Transistor Corp
GPD Optoelectronics Corp
Harris Semiconductor
Hi-Tron Semiconductor Corp
Inchange Semiconductor Company Ltd
International Devices Inc
Intersil Corporation
Microchip Technology Inc
Microsemi Corporation
Mospec Semiconductor Corp
Motorola Mobility LLC
Motorola Semiconductor Products
National Semiconductor Corporation
New England Semiconductor
New Jersey Semiconductor Products Inc
Nisshinbo Micro Devices
NTE Electronics Inc
onsemi
Ricoh Electronic Devices Co Ltd
Rochester Electronics LLC
Semicoa Semiconductors
Semiconductor Technology Inc
Semiconductors Inc
Semitronics Corp
Silicon Transistor Corporation
Solid Power Corp
Solid State Devices Inc (SSDI)
Solitron Devices Inc
Space Power Electronics Inc
Spectrum Control
STMicroelectronics
Swampscott Electronics Co Inc
Telcom Semiconductor Inc
Texas Instruments
Torex Semiconductor LTD
Transistor & Electronic Co
TT Electronics Power and Hybrid / Semelab Limited
TT Electronics Resistors
Not Found

Unijunction Transistor, 12uA I(P), TO-5, TO-5, 3 PIN

Part Details for 2N491 by Central Semiconductor Corp

Overview of 2N491 by Central Semiconductor Corp

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Applications Automotive

Part Details for 2N491

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2N491 Part Data Attributes

2N491 Central Semiconductor Corp
Buy Now Datasheet
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2N491 Central Semiconductor Corp Unijunction Transistor, 12uA I(P), TO-5, TO-5, 3 PIN
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Pbfree Code No
Rohs Code No
Part Life Cycle Code Obsolete
Ihs Manufacturer CENTRAL SEMICONDUCTOR CORP
Part Package Code TO-5
Package Description TO-5, 3 PIN
Pin Count 3
Reach Compliance Code not_compliant
ECCN Code EAR99
Configuration SINGLE
Emitter Current-Max 70 mA
Inter-base Voltage-Max 65 V
Intrinsic Stand-off Ratio-Max 0.68
Intrinsic Stand-off Ratio-Min 0.56
JEDEC-95 Code TO-5
JESD-30 Code O-MBCY-W3
JESD-609 Code e0
Number of Elements 1
Number of Terminals 3
Operating Temperature-Max 140 °C
Operating Temperature-Min -65 °C
Package Body Material METAL
Package Shape ROUND
Package Style CYLINDRICAL
Peak Point Current-Max 12 mA
Power Dissipation-Max (Abs) 0.45 W
Qualification Status Not Qualified
Static Inter-base Res-Max 6.8 kΩ
Static Inter-base Res-Min 4.7 kΩ
Surface Mount NO
Terminal Finish TIN LEAD
Terminal Form WIRE
Terminal Position BOTTOM
Transistor Element Material SILICON
Valley Point Current-Min 8 mA

Alternate Parts for 2N491

This table gives cross-reference parts and alternative options found for 2N491. The Form Fit Function (FFF) tab will give you the options that are more likely to serve as direct pin-to-pin alternates or drop-in parts. The Functional Equivalents tab will give you options that are likely to match the same function of 2N491, but it may not fit your design. Always verify details of parts you are evaluating, as these parts are offered as suggestions for what you are looking for and are not guaranteed.

Part Number Manufacturer Composite Price Description Compare
2N491 Advanced Semiconductor Inc Check for Price Unijunction Transistor, 12uA I(P), TO-5, TO-5, 3 PIN 2N491 vs 2N491
2N491A Central Semiconductor Corp Check for Price Unijunction Transistor, 12uA I(P), TO-5, TO-5, 3 PIN 2N491 vs 2N491A
2N491 Texas Instruments Check for Price UJT, TO-5 2N491 vs 2N491

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