1N4749A-TP

Overview

The MCC 1N4749A-TP is a silicon planar Zener diode housed in a hermetically sealed DO-41 glass package. It provides a nominal voltage of 24 V with a ±5% tolerance and a maximum power dissipation of 1 W at 50°C ambient temperature. The device features a reverse leakage current of 5 µA at 18.2 V, a dynamic impedance of 25 Ω at the test current of 10.5 mA, and a forward voltage drop of 1.2 V at 200 mA. It operates within a junction temperature range of -65°C to +200°C.

Feature Summary

• Hermetically sealed glass construction for environmental protection
• Silicon planar technology for stable voltage regulation
• Lead-free finish compliant with RoHS directives

Applications

• Low voltage stabilizers
• Voltage reference circuits
• Surge protection applications

Procurement Notes

Verify that the ordering suffix '-TP' confirms lead-free and RoHS compliance status as specified by the manufacturer. Confirm the specific packaging format required, such as tape-and-reel or ammo pack, matches the project needs. Ensure the component is sourced from authorized distributors to guarantee authenticity and traceability.

Selection Notes

Select this component when a 24 V regulation point is required with tight ±5% tolerance. The DO-41 axial package suits through-hole mounting. Verify thermal derating requirements above 50°C, as power dissipation decreases by 10 mW per degree Celsius. Consider the high operating temperature limit if used in enclosed environments.

Part Context

This part belongs to the 1N4728 through 1N4761 series of 1 Watt Zener diodes manufactured by Micro Commercial Components. The series covers a wide voltage range from 3.3 V to 75 V. The 'A' suffix indicates a 5% voltage tolerance, distinguishing it from standard versions which typically have 10% tolerance.

Replacement Considerations

Compatible substitutes include Vishay 1N4749A and onsemi 1N4749A. These alternatives share the same 24 V rating, 1 W power dissipation, and DO-41 package form factor.