1N4763CP/TR8

Overview

The Microsemi 1N4763CP/TR8 is a silicon Zener diode with a nominal voltage of 91 V and a tight tolerance of ±2%. It operates in a plastic DO-41 (DO-204AL) axial-lead package, rated for 1.0 W power dissipation at 25°C. The device features a maximum dynamic impedance of 250 Ω at a test current of 2.8 mA and a reverse leakage current of 5 μA at 3000 V. It includes a tape-and-reel suffix for automated mounting and complies with RoHS standards.

Feature Summary

• Provides precise voltage regulation with ±2% tolerance via the C suffix designation
• Utilizes void-free transfer molded thermosetting epoxy body for moisture resistance
• Offers flexible axial-lead terminals compatible with standard through-hole processes
• Includes tape-and-reel packaging option for efficient surface mount assembly

Applications

• Voltage reference circuits requiring stable 91 V levels
• Overvoltage protection in industrial control systems
• Power supply regulation within broad operating temperature ranges

Procurement Notes

Verify that the ordering prefix matches the required screening level, as military variants require specific prefixes like MQ or MX. Confirm the presence of the TR suffix indicates tape-and-reel packaging rather than bulk. Ensure the e3 suffix is present if RoHS compliance is mandatory for the assembly process. Cross-reference the C suffix to confirm the 2% tolerance requirement is met.

Selection Notes

Select this component when a 91 V Zener voltage with tighter than standard 5% tolerance is required. The plastic package offers lower thermal resistance compared to glass-body options. Consider the tape-and-reel format for high-volume automated assembly lines. Verify that the 1.0 W power rating and thermal derating curves meet the specific circuit's heat dissipation needs under expected ambient conditions.

Part Context

This part belongs to the 1N4728AP through 1N4764AP series of 1-watt silicon Zener diodes manufactured by Microsemi's Scottsdale Division. The series covers a voltage range from 3.3 V to 100 V. The 1N4763 variant specifically targets the higher end of this spectrum, providing regulation near 91 V. The plastic encapsulation distinguishes it from the glass-body G-suffix counterparts.

Replacement Considerations

Direct substitutes include other manufacturers' 1N4763A equivalents meeting JEDEC specifications. For tighter tolerances, consider 1N4763D for 1% accuracy. Surface mount replacements are available in SMAJ or MLL packages. Ensure any replacement maintains the 1.0 W power rating and compatible axial lead spacing if form factor is critical.