1N5357B-TP

Overview

The MCC 1N5357B-TP is a 5-watt single Zener diode with a nominal voltage of 20V and ±5% tolerance. It operates in the DO-15 axial through-hole package, supporting junction temperatures from -55°C to +200°C under pulsed conditions. Key electrical parameters include a maximum dynamic impedance of 3 Ohms at 65mA test current, a maximum reverse leakage current of 0.5µA at 15.2V, and a peak surge current rating of 0.4A for an 8.3ms pulse width.

Feature Summary

• Provides stable voltage regulation within a wide operating temperature range suitable for demanding environments
• Features low thermal resistance design allowing operation at high DC currents with adequate heat sinking
• Encapsulated in UL 94 V-0 rated plastic epoxy for enhanced fire safety

Applications

• Voltage regulation circuits requiring 5W power dissipation
• Power supply protection against overvoltage transients
• Reference voltage generation in electronic systems

Procurement Notes

Verify compliance with RoHS3 standards and confirm the presence of the TP suffix indicating lead-free finish. Ensure procurement channels are authorized distributors to guarantee genuine parts with full traceability. Check for specific halogen-free requirements by confirming the HF suffix if applicable. Validate that the component meets the required JEDEC DO-15 mechanical specifications before integration.

Selection Notes

Select this component when a 20V regulation point is needed with a 5W power rating. The DO-15 package is appropriate for through-hole mounting where higher thermal mass is beneficial. Consider the 3 Ohm dynamic impedance for applications requiring moderate regulation accuracy. Verify that the 0.4A surge capability aligns with the expected transient energy levels in the target circuit design.

Part Context

This device belongs to the 1N5338B through 1N5388B series of silicon 5-watt Zener diodes manufactured by Micro Commercial Components. The series covers a voltage range from 5.1V to 200V, offering various tolerances identified by suffix letters. These components are designed for general-purpose voltage regulation and protection applications in industrial and commercial electronics.

Replacement Considerations

Equivalent parts include the standard 1N5357B and the SMBJ5357B-TP for surface mount applications. Military-grade equivalents such as MQ1N5357BE3 or MSP1N5357BE3 are available for specialized screening requirements. Ensure pinout compatibility and thermal characteristics match when substituting.