2N491: 450mW Unijuction Transistor

Overview

Product Description

This Unijuction Transistor is packaged in TO-5 package, which has a power rating of 450mW.

Available as High Reliability device per MIL-PRF-19500 indicate –HR suffix after the part number. Contact for -HR flow. Add "PBF" suffix for Pb-free lead finish.

Applications:

Unijunction Transistors are used in thyristor-triggering, oscillator, pulse and timing circuits.

Technical Documentation

Availability:

Part Number Descriptive Datasheet HR Flow
Power Rating
PD
mW
Package
Inventory
Distributor On-
hand
Pricing Last
Update
2N491
Unijuction Transistor download download 450 TO-5 Digitron 3135 RFQ 12/27/2017 3:46:04 PM
2N491A
Unijuction Transistor download download 450 TO-5 Digitron 5160 RFQ 12/27/2017 3:46:05 PM
2N491B
Unijuction Transistor download download 450 TO-5 Digitron 2420 RFQ 12/27/2017 3:46:07 PM
2N491A-HR
Unijuction Transistor download download 450 TO-5 Digitron 60 RFQ 12/27/2017 3:46:06 PM
2N491-HR
Unijuction Transistor download download 450 TO-5 Digitron 0 RFQ 12/27/2017 12:29:05 PM
2N491B-HR
Unijuction Transistor download download 450 TO-5 Digitron 0 RFQ 12/27/2017 12:29:04 PM
Specifications
Part
Number
Descriptive Datasheet HR Flow
Power Rating
PD
mW
Intrinsic Standoff Ratio Max
η
 
Intrinsic Standoff Ratio Min
η
 
Interbase Resistance Min
rBB
KOHMS
Interbase Resistance Max
rBB
KOHMS
Min Valley Point Current
IV
mA
Package
2N491
Unijuction Transistor download download 450 0.68 0.56 4.7 6.8 8 TO-5
2N491A
Unijuction Transistor download download 450 0.68 0.56 4.7 6.8 8 TO-5
2N491B
Unijuction Transistor download download 450 0.68 0.56 4.7 6.8 8 TO-5
2N491A-HR
Unijuction Transistor download download 450 0.68 0.56 4.7 6.8 8 TO-5
2N491-HR
Unijuction Transistor download download 450 0.68 0.56 4.7 6.8 8 TO-5
2N491B-HR
Unijuction Transistor download download 450 0.68 0.56 4.7 6.8 8 TO-5