1N5388C/TR8

Overview

The Microsemi Corporation 1N5388C/TR8 is a silicon 5.0-watt Zener diode from the JEDEC registered 1N5333-5388B series, designed for voltage regulation applications. It features a nominal Zener voltage of 200 V with a tight tolerance of ±2%, indicated by the C suffix. The device operates within a temperature range of -65°C to +150°C and utilizes a T-18 axial-lead package. Electrical characteristics include a maximum reverse current of 500 µA at 144 V and a maximum dynamic impedance of 480 Ohms. The component is supplied in tape and reel packaging.

Feature Summary

• Provides precise voltage regulation with tight ±2% tolerance via the C suffix designation.
• Engineered for high surge stress withstand capability and minimal voltage change versus current.
• Features flexible axial-lead mounting terminals suitable for through-hole integration.
• Constructed with a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards.

Applications

• Voltage regulation over broad operating current and temperature ranges
• High maximum DC current operation with adequate heat sinking
• Surge protection circuits requiring high energy absorption

Procurement Notes

Verify the specific ordering suffix TR8 confirms tape and reel packaging rather than cut tape or loose units. Confirm that the C suffix strictly denotes the ±2% voltage tolerance required for the design. Ensure compatibility with the T-18 axial lead form factor during PCB layout. Check for RoHS compliance status if environmental regulations apply, as standard versions may not be compliant.

Selection Notes

Select this component when a 200 V reference requires tighter stability than standard ±5% or ±10% variants offer. The 5-watt power rating supports high-current applications provided thermal resistance limits are respected. Verify that the T-18 package dimensions fit the available board space. Consider the maximum dynamic impedance of 480 Ohms against circuit sensitivity requirements.

Part Context

This part belongs to the 1N5333B through 1N5388B series of silicon 5-watt Zener diodes manufactured by Microsemi's Scottsdale Division. The series covers a wide voltage selection from 3.3 V to 200 V. The 1N5388 variant specifically targets the upper end of this voltage range, offering robust performance in high-voltage regulation scenarios.

Replacement Considerations

Consult the datasheet for surface mount equivalents such as SMBJ5388B or SMBG5388B if footprint changes are permissible. Verify that any substitute maintains the 200 V nominal voltage and ±2% tolerance specification.