1N484B

Overview

The Microchip Technology 1N484B is a high conductance silicon signal diode housed in a DO-35 glass package. It features a peak inverse voltage of 125 V and an average forward rectified current of 0.2 A at 25°C ambient temperature. The device supports a junction temperature range from -65°C to +200°C with no derating required up to the maximum limit. Key electrical characteristics include a maximum forward voltage drop of 1.0 V at 0.1 A, a maximum leakage current of 25 µA at 150°C, and a minimum saturation voltage of 150 V.

Feature Summary

• Humidity proof glass construction for environmental stability
• Thermally matched system design ensuring consistent performance
• Sigma Bond plated contacts providing reliable interconnects
• Compatible with automatic pick and place mounting equipment

Applications

• General purpose diode applications in power supplies
• Signal clipping circuits
• Current steering applications

Procurement Notes

Verify the specific manufacturer source documentation when sourcing this component, as specifications may vary between original equipment manufacturers and secondary suppliers. Confirm that the DO-35 glass package matches your thermal and mechanical requirements. Ensure the procurement channel provides traceability for the Sigma Bond contacts and solderability guarantees. Cross-reference the absolute maximum ratings against your circuit's surge and thermal conditions before finalizing orders.

Selection Notes

Select the 1N484B when a 125 V peak inverse voltage rating is required alongside a 0.2 A average forward current capability. This component is suitable for designs operating at temperatures up to 200°C without derating. Consider this part for harsh environments where hermeticity is critical. Verify compatibility with ceramic boards and high-temperature IR solder reflow processes if surface mount or automated assembly is planned.

Part Context

This component belongs to the 1N482B through 1N486B series of high conductance DO-35 diodes. The series shares identical physical dimensions and thermal characteristics, differing primarily in their peak inverse voltage ratings. The 1N484B occupies the middle tier of this voltage range, offering 125 V blocking capability while maintaining the standard 0.2 A current handling and low forward voltage drop typical of the family.

Replacement Considerations

LL-35 MiniMELF types are available as substitutes; replace the '1N' prefix with 'LL' to identify equivalent miniaturized versions.