1N978B BK TIN/LEAD

Single Zener Diodes Overview

The 1N978B BK TIN/LEAD is a silicon planar power Zener diode manufactured by Central Semiconductor Corp. It features a nominal Zener voltage of 51 V with a standard tolerance of ±5%, indicated by the 'B' suffix. The device is rated for a maximum power dissipation of 500 mW and exhibits a Zener impedance of 125 Ohms at the test current. It is housed in a DO-35 through-hole package with a tin/lead solder alloy finish, suitable for rugged equipment assemblies.

Single Zener Diodes Feature Summary

• Silicon planar construction designed for power applications
• Standardized voltage tolerance for consistent performance
• Tin/lead alloy finish compatible with regulated assembly processes

Single Zener Diodes Applications

• Voltage regulation in general purpose circuits
• Rugged equipment requiring hermetic or regulated assemblies
• Power supply reference stages

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix to confirm the tin/lead lead finish and DO-35 package style. Ensure the application environment supports the specified power dissipation limits. Confirm RoHS status requirements as tin/lead finishes may not comply with all environmental directives. Cross-reference the manufacturer part number with distributor codes to ensure exact component matching.

Single Zener Diodes Selection Notes

Select this component when a stable 51 V reference is required in a through-hole configuration. The 500 mW rating allows for moderate power handling in compact designs. The DO-35 package facilitates easy manual insertion and prototyping. Verify that the operating temperature range aligns with the system's thermal constraints.

Single Zener Diodes Part Context

This component belongs to the 1N978 series of silicon planar power Zener diodes from Central Semiconductor. The series offers various voltage options within the same physical footprint. The 'B' designation specifically denotes the ±5% voltage tolerance band, distinguishing it from other precision or loose tolerance variants in the product line.

Single Zener Diodes Replacement Considerations

Direct substitutes include other manufacturers' 1N978B equivalents meeting the 51 V, 500 mW, and DO-35 specifications. Ensure any replacement maintains the same Zener impedance and leakage current characteristics for circuit stability.