1N5357B

Overview

The onsemi 1N5357B is a single-channel Zener voltage regulator diode from the 1N53 Series, housed in an axial lead DO-15 (Surmetic 40) package. It features a nominal Zener voltage of 20 V with a ±5% tolerance and a maximum steady-state power dissipation of 5 W at 25°C. The device operates within a junction temperature range of -65°C to +200°C. Key electrical parameters include a test current of 65 mA, a maximum Zener impedance of 3 Ω, and a maximum reverse leakage current of 0.4 mA at 15.2 V.

Feature Summary

• Utilizes silicon-oxide passivated junctions for superior operating characteristics and environmental protection.
• Provides high surge current capability rated up to 180 W for an 8.3 ms pulse width.
• Features tight limits guaranteed on multiple electrical parameters including voltage and impedance.

Applications

• General-purpose voltage regulation circuits
• Transient overvoltage protection applications
• Reference voltage sources in electronic equipment

Procurement Notes

Verify the specific ordering suffix when purchasing. The base part number 1N5357B typically denotes the standard JEDEC specification. Suffixes such as 'G' indicate Pb-Free packaging availability. Confirm that the required package type matches the application's mechanical constraints before procurement.

Selection Notes

Select this component for applications requiring a stable 20 V reference with moderate power handling capabilities. Ensure the circuit design accounts for the thermal resistance between the junction and leads. Verify that the expected operating current remains below the maximum DC Zener current limit to prevent overheating.

Part Context

This device belongs to the 1N53 Series of 5 Watt Zener Voltage Regulators manufactured by onsemi. The series covers a wide Zener voltage range from 3.3 V to 200 V. All devices in this family share the same Surmetic 40 axial lead plastic package construction and similar thermal characteristics.

Replacement Considerations

Compatible substitutes include the 1N5357B-TP from Micro Commercial Components (MCC). Both parts share identical nominal voltage, power rating, and package dimensions. Verify manufacturer-specific tolerances and thermal ratings before final substitution.