1N4746A_R2_00001

Overview

The Panjit International Inc. 1N4746A_R2_00001 is a silicon zener diode belonging to the 1N4728A series, designed for voltage regulation applications. It features a nominal zener voltage of 18 V with a tolerance range of 17.1 V to 18.9 V at a test current of 14 mA. The device has a maximum power dissipation of 1 W and operates within a temperature range of -55°C to +150°C. Electrical characteristics include a maximum zener impedance of 20 Ω and a maximum reverse leakage current of 0.1 µA at 13.7 V. It utilizes a DO-41 molded plastic case with axial leads.

Feature Summary

• Plastic package complies with UL 94V-O flammability classification
• Terminals are solderable per MIL-STD-750 Method 2026
• Lead-free construction compliant with EU RoHS 2.0 standards

Applications

• Voltage regulation circuits
• General purpose rectification
• Power supply protection

Procurement Notes

Verify that the ordering suffix _R2_00001 corresponds to the specified reel packing configuration (5K pcs / 13” paper Reel) as documented in the official datasheet. Confirm compliance requirements such as RoHS 2.0 and UL 94V-O ratings match project specifications. Ensure the manufacturer is identified as Panjit International Inc. to distinguish from other vendors using the same base part number.

Selection Notes

Select this component when an 18 V zener reference with 1 W power handling is required in a through-hole DO-41 package. Consider the 20 Ω dynamic impedance and 0.1 µA leakage limits for circuit stability. Verify thermal derating curves if operation exceeds 25°C ambient conditions. Ensure the application does not involve life-critical systems, as the datasheet explicitly excludes authorization for medical or aerospace use.

Part Context

This component is part of the 1N4728A series manufactured by Panjit International Inc., covering nominal voltages from 3.3 V to 68 V. The 1N4746A variant specifically targets the 18 V segment of this standard zener lineup. The series is characterized by low inductance and high-temperature soldering capability up to 260°C for 10 seconds.

Replacement Considerations

Cross-reference with other manufacturers' 1N4746A parts for pin-compatible substitution. Verify that alternative sources provide identical electrical parameters, specifically the 18 V nominal voltage, 1 W power rating, and DO-41 package dimensions.