1N4745A R1G

Overview

The 1N4745A R1G is a silicon planar Zener diode manufactured by Taiwan Semiconductor Corporation. It provides a nominal voltage regulation of 16 V with a tolerance of ±5%. The device is designed for through-hole mounting in the DO-41 axial leaded package, which features hermetically sealed glass construction and compression bonded internal elements. It supports a maximum steady-state power dissipation of 1 W at ambient temperatures up to 50°C, with derating required above this threshold. The component operates within a temperature range of -65°C to +200°C and exhibits a maximum dynamic impedance of 16 Ohms at the test current of 15.5 mA.

Feature Summary

• Hermetically sealed glass construction with corrosion-resistant external surfaces
• Compression bonded internal element design for structural integrity
• Pure tin plated leads ensuring solderability per MIL-STD-208 standards

Applications

• Voltage regulation in DC power supply circuits
• Clipping and clamping applications in signal processing
• Reference voltage sources in electronic measurement equipment

Procurement Notes

Verify that the ordering suffix 'R1G' corresponds specifically to the reel packaging configuration as defined by Taiwan Semiconductor. Confirm RoHS compliance status and REACH SVHC declarations against the latest manufacturer documentation prior to integration. Ensure the procurement specification matches the DO-41 package dimensions and lead finish requirements for the target assembly process.

Selection Notes

Select this component when a stable 16 V reference is required in high-reliability environments due to its hermetic sealing. The DO-41 package allows for standard through-hole PCB mounting techniques. Consider the thermal derating characteristics if the operating environment exceeds 50°C to maintain the 1 W power rating safely. Verify compatibility with existing circuit impedance requirements given the 16 Ohm dynamic impedance specification.

Part Context

This part belongs to the 1N47xxA series of 1 Watt Zener diodes produced by Taiwan Semiconductor. The series covers a wide voltage range from 3.3 V to 56 V, utilizing the same DO-41 JEDEC package format. The 'A' designation typically indicates a ±5% voltage tolerance, distinguishing it from tighter tolerance variants. This specific model represents a standard industry-compatible regulator diode widely used in general-purpose electronics.

Replacement Considerations

Cross-reference with other manufacturers offering the 1N4745A designation in the DO-41 package. Verify that substitute parts meet the identical 16 V nominal voltage, 1 W power dissipation, and ±5% tolerance specifications. Ensure the replacement component maintains comparable thermal performance and reverse leakage current characteristics.