1N4742A_T50R

Overview

The onsemi 1N4742A_T50R is a single silicon Zener diode housed in a DO-41 glass case. It provides a nominal voltage of 12 V with a tolerance of ±5%. The device dissipates up to 1 W at lead temperatures below 50°C and operates within a junction temperature range of -65°C to +200°C. Electrical characteristics include a maximum dynamic impedance of 9 Ohms at the test current of 21 mA, and a maximum reverse leakage current of 5 µA.

Feature Summary

• Provides stable voltage regulation using sharp reverse characteristic breakdown
• Features low reverse current levels for efficient operation
• Constructed with hermetically sealed glass and compression bonded materials

Applications

• Voltage stabilization circuits
• Absolute reference voltage generation

Procurement Notes

Verify the specific T50R suffix against official documentation to confirm reel packaging specifications. Ensure the component meets RoHS compliance requirements for your assembly process. Cross-reference the datasheet revision number to validate electrical parameters before integration into final designs.

Selection Notes

Select this component when a 12 V reference is required in a through-hole DO-41 package. Consider the 1 W power dissipation limit and derating curves above 50°C. Verify that the 9 Ohm impedance and 5 µA leakage meet circuit sensitivity requirements.

Part Context

This part belongs to the 1N4728A through 1N4758A series of 1.0 W Zener diodes manufactured by onsemi. The series covers a wide voltage range from 3.3 V to 56 V. All devices share the same DO-41 JEDEC registered package and mechanical construction standards.

Replacement Considerations

Other manufacturers produce equivalents under the 1N4742A designation. Verify pinout polarity and physical dimensions match the DO-41 standard before substitution.