1N5257B BK PBFREE

Single Zener Diodes Overview

The Central Semiconductor Corp 1N5257B BK PBFREE is a silicon Zener diode with a nominal voltage of 33 V and a tolerance of ±5%. It operates within a power dissipation limit of 500 mW at an ambient temperature of 75°C. The device features a maximum Zener impedance of 58 Ω at a test current of 3.8 mA, and a maximum reverse leakage current of 0.1 μA at 24 V. It utilizes a DO-35 axial through-hole package.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation for industrial and commercial applications
• Features low reverse leakage current and high stability
• Constructed using silicon planar technology

Single Zener Diodes Applications

• Industrial equipment voltage regulation
• Commercial circuit protection
• Computer system power supplies

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix to confirm compliance requirements. The 'BK' designation indicates bulk packaging, while 'PBFREE' confirms lead-free plating. Ensure the procurement request matches the exact alphanumeric sequence to avoid receiving non-compliant or incorrectly packaged variants during acquisition.

Single Zener Diodes Selection Notes

Select this component when a 33 V reference with ±5% tolerance is required in a DO-35 package. Confirm that the 500 mW power rating and 58 Ω impedance meet the circuit's thermal and dynamic load requirements. Verify compatibility with existing axial mounting constraints before finalizing the design choice.

Single Zener Diodes Part Context

This part belongs to the 1N5221B through 1N5278B series of silicon Zener diodes manufactured by Central Semiconductor Corp. The series covers voltages from 2.4 V to 170 V, all housed in the standard DO-35 glass case. The 'B' suffix specifically denotes the ±5% voltage tolerance variant within this product family.

Single Zener Diodes Replacement Considerations

No official replacement part numbers are listed for the 1N5257B in the manufacturer documentation. The datasheet notes that certain higher-voltage devices in the series have been transitioned to End of Life status without direct substitutes provided.