1N4746G

Overview

The Taiwan Semiconductor 1N4746G is a hermetically sealed glass Zener diode designed for voltage regulation and reference applications. It operates within the 1N4728G to 1N4758G series, featuring a nominal Zener voltage of 18V with a standard tolerance of ±5%. The device supports a maximum power dissipation of 1W at 25°C and utilizes a DO-41 through-hole package. Electrical characteristics include a test current of 14mA, a maximum Zener impedance of 20Ω, and a leakage current of 5µA at 13.7V reverse voltage. It withstands junction temperatures from -65°C to +200°C.

Feature Summary

• Hermetically sealed glass construction ensures environmental stability
• Provides stable voltage regulation across a wide temperature range
• Features pure tin plated leads compatible with standard soldering processes

Applications

• Low voltage stabilizers
• Voltage references
• Adapters
• Lighting applications
• On-board DC/DC converters

Procurement Notes

Verify the specific ordering suffix (R0G or A0G) to confirm packaging type, as the base part number covers multiple configurations. Confirm RoHS compliance status directly with the manufacturer or authorized distributor prior to procurement. Ensure the selected variant matches the required reel or ammo box quantity specifications for your assembly line.

Selection Notes

Select this component when a precise 18V reference is required in a ruggedized environment due to its hermetic sealing. The DO-41 package facilitates easy through-hole mounting. Consider the thermal resistance values if operating near the maximum power dissipation limit. Verify that the ±5% voltage tolerance aligns with the circuit design requirements.

Part Context

This component belongs to the 1N47xxG series manufactured by Taiwan Semiconductor Corporation. The 'G' suffix typically denotes the specific manufacturing lot or package variation within the broader 1N4746 family. It shares electrical parameters with other manufacturers' equivalents but maintains unique mechanical and marking specifications defined by TSC.

Replacement Considerations

Direct replacements include the 1N4746A from other manufacturers such as onsemi or Microchip Technology, provided they meet the same 18V, 1W, and DO-41 specifications. Ensure any substitute also offers hermetic sealing if environmental protection is critical to the application.