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1N4705 BK TIN/LEAD
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Product Detailed Parameters
- Description：18V 500MW TH DIODE-ZENER SINGLE:
- Series：-
- Mfr：Central Semiconductor Corp
- Package：Box
- 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 BK TIN/LEAD is a silicon epitaxial planar Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 18V with a tolerance of 5%. The device is rated for a maximum power dissipation of 0.5W and utilizes a DO-35 axial glass package. It supports a junction temperature range from -65°C to +175°C and includes a black cathode band for polarity identification.
Feature Summary
- Utilizes silicon epitaxial planar technology for stable voltage regulation
- Encased in hermetically sealed glass DO-35 package for environmental protection
- Features tin/lead terminations for through-hole mounting compatibility
Applications
- Voltage reference circuits requiring stable DC levels
- Overvoltage protection stages in electronic systems
- General-purpose voltage regulation in low-power designs
Procurement Notes
Verify the specific ordering suffix 'BK TIN/LEAD' against manufacturer documentation to confirm lead content and packaging style. Ensure the procurement specification matches the required DO-35 glass package and 18V Zener voltage rating. Confirm RoHS compliance status if restricted materials are prohibited in the target assembly process.
Selection Notes
Select this component when a standard 18V Zener voltage is required in a small axial glass package. The 0.5W power rating suits low-current regulation tasks. Verify that the operating environment remains within the specified -65°C to +175°C junction temperature range to ensure reliable performance and longevity of the device.
Part Context
This part belongs to the 1N47xx series of Zener diodes, a widely recognized family of voltage regulators. The 1N4705 specifically denotes an 18V variant within this lineup. Central Semiconductor manufactures these devices using silicon epitaxial planar processes, ensuring consistent electrical characteristics across production batches for industrial and commercial applications.
Replacement Considerations
Compatible substitutes include the 1N4705A from other manufacturers offering identical 18V specifications. Verify pinout compatibility and thermal resistance values before substitution. Ensure the replacement device meets the same DO-35 package dimensions and power dissipation requirements.
