1N4744A-T

Overview

The Diodes Incorporated 1N4744A-T is a silicon planar Zener diode housed in a DO-41 glass package. It provides a nominal Zener voltage of 15 V with a standard tolerance of 5%. The device supports a power dissipation of 1.0 W at 25°C, derating to 6.67 mW/°C above this temperature. Electrical characteristics include a maximum Zener impedance of 14 Ω at a test current of 17 mA and a maximum reverse leakage current of 5 µA at 11.4 V. The component operates within a junction and storage temperature range of -65°C to +175°C.

Feature Summary

• Provides stable voltage regulation using a silicon planar construction within a glass encapsulated case.
• Features a lead-free finish that complies with RoHS directives for environmental safety.
• Designed for through-hole mounting with terminals finished in Sn96.5Ag3.5 for reliable solderability.

Applications

• Voltage regulation in electronic circuits
• Reference voltage generation
• Overvoltage protection

Procurement Notes

Verify the specific ordering suffix '-T' corresponds to the Tape & Reel packaging configuration containing 5,000 units per reel. Confirm compliance requirements such as RoHS status and material specifications against the manufacturer's datasheet DS18007 Rev. 19-3 before finalizing procurement orders.

Selection Notes

Select this component for applications requiring a 15 V reference or regulation point with a 1 W power rating. Ensure the circuit design accommodates the thermal resistance of 175 °C/W and the specified operating temperature range. Consider the DO-41 package dimensions for PCB layout constraints and verify that the 5% voltage tolerance meets the system accuracy requirements.

Part Context

This part belongs to the 1N4728A through 1N4761A series of 1.0 Watt Zener diodes manufactured by Diodes Incorporated. The series offers a wide selection of nominal voltages ranging from 3.3 V to 75 V. These devices are JEDEC registered and utilize a glass body construction for high-temperature stability and reliability in various industrial and commercial electronics applications.

Replacement Considerations

Check for equivalent parts from other manufacturers offering the same 15 V, 1 W specification in a DO-41 package. Verify pinout compatibility and electrical parameter alignment, specifically Zener impedance and leakage current limits, to ensure functional interchangeability without redesigning the host circuit.

FAQ

What does the '-T' suffix indicate for this part number?

The '-T' suffix indicates that the device is supplied in Tape & Reel packaging, with a shipping quantity of 5,000 units per reel.

Is this component suitable for high-temperature environments?

Yes, the 1N4744A-T is rated for an operating and storage temperature range of -65°C to +175°C, making it suitable for demanding thermal conditions.