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1N4705 TR TIN/LEAD
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Product Detailed Parameters
- Description：18V 500MW TH DIODE-ZENER SINGLE:
- Series：-
- Mfr：Central Semiconductor Corp
- Package：Tape & Reel (TR)
- Voltage - Zener (Nom) (Vz)：18 V
- Tolerance：±5%
- Power - Max：500 mW
- Impedance (Max) (Zzt)：-
- Current - Reverse Leakage @ Vr：50 nA @ 13.6 V
- Operating Temperature：-65°C ~ 200°C (TJ)
- Mounting Type：Through Hole
- Package / Case：DO-204AH, DO-35, Axial
- Voltage - Forward (Vf) (Max) @ If：1.5 V @ 100 mA
- Grade：-
- Qualification：-
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Overview
The Central Semiconductor Corp 1N4705 TR TIN/LEAD is a silicon epitaxial planar Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 18V with a 5% tolerance and operates at a test current of 4 mA. The device provides a maximum power dissipation of 0.25 W in a DO-35 package, suitable for through-hole mounting. Key electrical characteristics include a maximum reverse leakage current of 50 uA and a Zener impedance of 50 ohms. It supports an operating temperature range from -65 C to +200 C.
Feature Summary
- Utilizes silicon epitaxial planar technology for stable voltage regulation
- Provides precise 18V reference with tight 5% voltage tolerance
- Features low reverse leakage current for efficient operation
- Designed for high-temperature environments up to 200 C
Applications
- Voltage regulation circuits
- Reference voltage sources
- Overvoltage protection
Procurement Notes
Verify the specific ordering suffix 'TR TIN/LEAD' against official Central Semiconductor documentation to confirm lead content and reel packaging specifications. Ensure compatibility with RoHS directives if required by your application standards. Cross-reference the manufacturer part number with authorized distributors to validate authenticity and traceability before procurement.
Selection Notes
Select this component when a 18V Zener voltage is required with a 0.25W power rating. Consider the DO-35 package size for through-hole assembly constraints. Evaluate the 50 ohm impedance and 50 uA leakage current against circuit sensitivity requirements. Confirm that the 200 C maximum junction temperature meets the thermal management needs of the target environment.
Part Context
This component belongs to the standard 1N47xx series of Zener diodes manufactured by Central Semiconductor. These devices are widely used in general-purpose electronics for voltage clamping and regulation. The 1N4705 variant specifically targets applications requiring an 18V breakdown voltage with moderate power handling capabilities in a compact axial leaded package.
Replacement Considerations
Compatible substitutes include other manufacturers' 1N4705 variants such as those from Microsemi or Vishay. Verify that replacement parts match the 18V Zener voltage, 0.25W power dissipation, and DO-35 package dimensions. Ensure equivalent electrical parameters like leakage current and impedance are within acceptable tolerances for the specific circuit design.
