1N4749A BK PBFREE

Overview

The 1N4749A BK PBFREE is a single Zener diode manufactured by Central Semiconductor Corp. It features a nominal Zener voltage of 15 V and a power dissipation rating of 1 W. The component operates within an axial leaded DO-41 package, available in bulk packaging with a factory pack quantity of 2000 units. Electrical specifications include a maximum reverse leakage current of 5 µA and a test current of 17 mA. The device supports a Zener current of 304 mA and complies with RoHS standards.

Feature Summary

• Provides stable voltage regulation at a nominal 15 V level for circuit protection applications.
• Engineered for low leakage current operation to minimize standby power loss.
• Constructed using silicon technology for reliable performance in standard rectifier and regulator circuits.

Applications

• Voltage reference sources in precision measurement equipment
• Overvoltage protection for sensitive electronic components
• Clamping circuits in signal processing paths

Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest documentation to ensure correct packaging and compliance status. Confirm that the DO-41 axial lead configuration matches your board layout requirements. Check for any recent product change notifications regarding material composition or testing procedures before finalizing procurement plans.

Selection Notes

Select this component when a 15 V regulated voltage point is required in a through-hole design. Ensure the circuit can handle the 1 W power dissipation without excessive thermal buildup. Verify that the 5 µA leakage current meets the sensitivity requirements of the connected load. Compare against other 15 V Zener options if tighter tolerance or lower impedance is needed.

Part Context

This part belongs to the standard 1N47xx series of axial leaded Zener diodes produced by Central Semiconductor. These devices are widely used in general-purpose electronics for voltage stabilization. The BK suffix typically denotes the bulk packaging format, distinguishing it from tape-and-reel variants.

Replacement Considerations

Equivalent parts include other manufacturers' 1N4749A diodes meeting the same 15 V, 1 W, and DO-41 specifications. Verify pinout compatibility and thermal characteristics when substituting with generic equivalents.