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Product Detailed Parameters
- Description：THROUGH-HOLE UJT
- Series：-
- Mfr：Central Semiconductor Corp
- Package：Box
- Voltage：-
- Power Dissipation (Max)：300 mW
- Voltage - Output：6V
- Voltage - Offset (Vt)：-
- Current - Gate to Anode Leakage (Igao)：-
- Current - Valley (Iv)：6 mA
- Current - Peak：400 nA
- Package / Case：TO-206AA, TO-18-3 Metal Can
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Overview
The Central Semiconductor Corp 2N4853 is a PN silicon unijunction transistor housed in a TO-18 metal can package. It features an interbase voltage ratio of 0.70 to 0.85 at V_B2B1=10V and a base resistance (R_BB) ranging from 4.7kΩ to 9.1kΩ at 3.0V. The device supports a maximum emitter reverse voltage of 30V, peak emitter current of 1.5A with duty cycles ≤1%, and RMS power dissipation of 300mW. Operating junction temperature spans -65°C to +125°C.
Feature Summary
- Designed for timing, sensing, and trigger circuits utilizing silicon PN unijunction technology.
- Features a robust TO-18 metal case construction suitable for high-reliability applications.
Applications
- Timing circuits
- Sensing circuits
- Trigger circuits
Procurement Notes
Verify availability status carefully as the product has been transitioned to End of Life (EOL) by Central Semiconductor Corp. Orders are restricted to existing stock only, with no further production accepted. Confirm final shipment dates and minimum order quantities directly with the manufacturer or authorized representatives before placing orders.
Selection Notes
Select this component specifically for legacy designs requiring a silicon unijunction transistor with defined interbase ratios. Ensure the application operates within the specified thermal limits (-65°C to +125°C). Consider that replacement parts are not officially listed by the manufacturer, necessitating careful evaluation of alternative sources if supply continuity is critical.
Part Context
The 2N4853 belongs to a series of PN silicon unijunction transistors manufactured by Central Semiconductor Corp. It shares the same physical TO-18 package and general electrical ratings as the 2N4851 and 2N4852, differing primarily in its specific interbase voltage ratio and leakage characteristics. This family is intended for discrete semiconductor applications.
Replacement Considerations
Central Semiconductor Corp lists no official replacement part numbers for the 2N4853. The device is classified as End of Life (EOL) and available only in existing stock. Designers must identify alternate sources independently or modify circuit designs to accommodate compatible unijunction transistors.
FAQ
What is the interbase voltage ratio range for the 2N4853?
The interbase voltage ratio (η) for the 2N4853 ranges from 0.70 to 0.85 when measured at V_B2B1=10V.
Is the 2N4853 currently in production?
No, the 2N4853 has been transitioned to End of Life (EOL) status and is available only from existing stock inventory.
What is the maximum peak emitter current rating?
The maximum peak emitter current is 1.5A, provided the duty cycle is less than or equal to 1% and the pulse repetition rate is less than or equal to 10pps.
