1N5357BG

Overview

The onsemi 1N5357BG is a single-channel Zener voltage regulator diode from the 1N53 Series, designed for robust performance in axial lead applications. It features a nominal Zener voltage of 20 V with a tolerance of ±5%. The device supports a maximum steady-state power dissipation of 5 W at a lead temperature of 25°C and operates within a junction temperature range of -65°C to +200°C. Key electrical parameters include a test current (IZT) of 65 mA, a maximum Zener impedance (ZZT) of 3 Ω, and a reverse leakage current (IR) of 500 nA at 15.2 V. Packaged in the DO-15 (CASE 017AA) through-hole format, it offers superior silicon-oxide passivated junction characteristics.

Feature Summary

• Utilizes silicon-oxide passivated junctions for improved operating characteristics and tight parameter limits.
• Provides high surge current capability with a rating of up to 180 W for an 8.3 ms pulse width.
• Features ESD protection rated at Class 3 (>16 kV) per the Human Body Model.
• Guarantees maximum limits on multiple electrical parameters for consistent reliability.

Applications

• Voltage regulation in general-purpose electronic circuits
• Protection against transient overvoltage events
• Reference voltage sources in power supply designs

Procurement Notes

Verify that the ordering suffix 'G' corresponds to the Pb-Free package specification as defined in the official datasheet. Confirm the specific package type matches the required mechanical constraints, noting that bulk packaging typically contains 1000 units per box while tape and reel options may vary. Ensure compliance with RoHS directives if applicable to the target assembly process.

Selection Notes

Select this component when a precise 20 V reference with ±5% tolerance is required in a high-power axial configuration. Consider the 5 W power dissipation limit and derating requirements above 25°C for thermal management. Evaluate the 3 Ω impedance and 500 nA leakage current against circuit sensitivity requirements to ensure adequate signal integrity and regulation stability under varying load conditions.

Part Context

This device belongs to the 1N53 Series of 5 Watt Surmetic 40 Zener Voltage Regulators manufactured by onsemi. The series covers a wide voltage range from 3.3 V to 200 V, all housed in the standard axial lead transfer-molded plastic package (CASE 017AA). The 1N5357B variant specifically targets the 20 V segment, offering balanced performance for medium-voltage regulation tasks requiring robust environmental protection.

Replacement Considerations

Compatible substitutes within the same family include the 1N5357B (standard version) and equivalents from other manufacturers such as MCC's 1N5357B-TP or Microsemi's MQ1N5357BE3, provided they match the 20 V nominal voltage, 5 W power rating, and DO-15 axial package dimensions.