1N5294 TR TIN/LEAD

Overview

The Central Semiconductor Corp 1N5294 TR TIN/LEAD is a silicon current regulator diode designed for through-hole mounting in the DO-35 axial package. It provides a maximum regulator current of 0.75 mA and a maximum limiting voltage of 1.2 V, with a peak operating voltage rating of 100 V. The device dissipates up to 500 mW and operates within a temperature range of -65 °C to +200 °C. It features a minimum dynamic impedance of 1,150,000 Ω and is supplied in a tape and reel configuration.

Feature Summary

• Provides stable current regulation via high dynamic impedance characteristics
• Operates reliably across an extended industrial temperature range
• Utilizes a standard axial leaded package for through-hole integration

Applications

• Constant current sources for LED biasing
• Current limiting protection circuits
• Biasing networks for transistor amplifiers

Procurement Notes

Verify that the specific ordering suffix matches the required tin/lead plating specification, as this variant differs from lead-free alternatives. Confirm the tape and reel packaging format aligns with automated assembly requirements. Ensure the manufacturer designation is Central Semiconductor Corp to distinguish from similar part numbers produced by other vendors such as Microchip Technology. Cross-reference the datasheet for exact electrical tolerances before finalizing procurement orders.

Selection Notes

Select this component when a fixed current output near 0.75 mA is required without active feedback loops. The DO-35 package suits designs prioritizing through-hole reliability over surface area constraints. Consider the 100 V peak voltage rating to ensure adequate headroom against transient spikes. Evaluate the thermal dissipation capabilities relative to ambient conditions to maintain operation within the specified junction temperature limits.

Part Context

This device belongs to the 1N529x series of current regulator diodes manufactured by Central Semiconductor Corp. These components utilize silicon planar technology to deliver consistent performance. The series offers various current ratings to accommodate different circuit demands while maintaining standardized physical dimensions and electrical behaviors typical of axial leaded Zener-based regulators.

Replacement Considerations

The 1N5294-1 from Microchip Technology serves as a functional substitute with identical electrical parameters. Verify that the replacement maintains the same DO-35 or compatible DO-7 axial footprint. Confirm that the tin/lead plating requirement is met if environmental compliance standards do not mandate lead-free materials.