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1N4746A
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Product Detailed Parameters
- Description：DIODE ZENER 18V 1W DO41
- Series：-
- Mfr：onsemi
- Package：Bulk
- Voltage - Zener (Nom) (Vz)：18 V
- Tolerance：±5%
- Power - Max：1 W
- Impedance (Max) (Zzt)：20 Ohms
- Current - Reverse Leakage @ Vr：5 µA @ 13.7 V
- Operating Temperature：-65°C ~ 200°C
- Mounting Type：Through Hole
- Package / Case：DO-204AL, DO-41, Axial
- Voltage - Forward (Vf) (Max) @ If：-
- Grade：-
- Qualification：-
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Overview
The onsemi 1N4746A is a single-channel general-purpose Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 18 V with a tolerance of ±5%. The device supports a maximum power dissipation of 1 W and operates within an extended temperature range from -65°C to +200°C. Packaged in the DO-41 axial through-hole format, it exhibits a maximum reverse leakage current of 5 µA and a Zener impedance of 20 Ω at a test current of 14 mA.
Feature Summary
- Hermetically sealed glass package construction
- Extended high-temperature operational capability up to 200°C
- General-purpose voltage regulation functionality
Applications
- Low voltage stabilizers
- Voltage reference circuits
- Overvoltage protection
Procurement Notes
Verify manufacturer origin as multiple entities produce this standard part number. Confirm RoHS compliance status varies by supplier; onsemi datasheets indicate detailed REACH SVHC information availability. Ensure package type matches DO-41 requirements. Check specific batch documentation for hermetic sealing verification if required for high-reliability environments.
Selection Notes
Select based on the 18 V nominal requirement and 1 W power rating. The DO-41 through-hole package dictates board layout constraints. Consider the ±5% tolerance for precision needs. Verify thermal management capabilities given the 200°C maximum junction temperature limit. Compare leakage current specifications against circuit sensitivity requirements.
Part Context
Part of the 1N47xx series of low voltage regulator diodes. Manufactured by onsemi using silicon technology. Available in bulk packaging. Standard JEDEC-95 code DO-41 defines the physical footprint. Commonly used in industrial and commercial electronics requiring stable DC voltage references.
Replacement Considerations
Verified parameter-equivalent substitutes include Microchip Technology 1N4746AMS and Nexperia 1N4746A. Central Semiconductor offers 1N4746A TR PBFREE. Vishay produces equivalent variants under the MULTICOMP brand.
