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1N4678 TR TIN/LEAD
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Product Detailed Parameters
- Description：1.8V 500MW TH DIODE-ZENER SINGLE
- Series：-
- Mfr：Central Semiconductor Corp
- Package：Tape & Reel (TR)
- Voltage - Zener (Nom) (Vz)：1.8 V
- Tolerance：±5%
- Power - Max：500 mW
- Impedance (Max) (Zzt)：-
- Current - Reverse Leakage @ Vr：7.5 µA @ 1 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 1N4678 TR TIN/LEAD is a single Zener diode with a nominal voltage of 1.8 V and a power dissipation rating of 500 mW. It features a maximum reverse leakage current of 7.5 µA at 1 V and operates within a temperature range of -65 °C to +200 °C. The device utilizes a DO-35-2 through-hole package and is supplied in bulk packaging.
Feature Summary
- Provides stable voltage regulation for low-level applications
- Features internal metallurgical bonding for reliability
- Offers flexible axial-lead mounting terminals
Applications
- Voltage regulation over broad operating currents
- Low-level Zener reference circuits
- Protection against voltage transients
Procurement Notes
Verify the specific tin/lead plating configuration against project requirements, as lead-free alternatives exist within the same series. Confirm that the bulk packaging format aligns with assembly line capabilities. Ensure the 1.8 V Zener voltage meets circuit design specifications before finalizing procurement orders.
Selection Notes
Select this component when a robust axial-lead Zener diode is required for high-temperature environments up to 200 °C. The 500 mW power rating suits moderate current applications. Consider the DO-35 package size for standard through-hole PCB layouts where surface-mount options are unsuitable.
Part Context
This part belongs to the 1N4678 series of 0.5-watt axial-leaded Zener voltage regulators. The series covers a wide voltage selection from 1.8 to 43 volts with standard 5% tolerances. These devices are designed for general-purpose voltage regulation and protection tasks in electronic circuits.
Replacement Considerations
Equivalent parts include the onsemi MMSZ4678T1G for surface mount needs or the Microchip MSP1N4678-1 for hermetic sealed variants. Verify pin compatibility and thermal characteristics when substituting.
