onsemi 1N5386BRL

Overview

1N5386BRL from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 180 V, ±5% tolerance, 5 mA test current (IZT), and maximum zener impedance of 5 Ω at IZT - designed for precision voltage regulation in high-voltage DC power supplies, overvoltage protection circuits, and reference applications.

For engineers reviewing the 1N5386BRL datasheet, pinout, applications, or equivalent options, key selection criteria include its 180 V nominal zener voltage, 5 W steady-state power rating, 430 A maximum surge current (8.3 ms), 1.0 V reverse leakage current at 137 V, and axial leaded Surmetic 40 package compatible with through-hole PCB assembly.

Technical Context

This device operates as a silicon-oxide passivated junction Zener regulator, delivering stable reverse breakdown behavior under DC and transient conditions. Its thermal design relies on junction-to-lead resistance (θJL = 25 °C/W) and lead-length-dependent derating - critical for sustained 5 W dissipation at TL ≤ 25°C.

The 1N5386BRL exhibits a positive temperature coefficient above ~100 V (≈+0.09 %/°C typical), enabling predictable drift in high-voltage references. It supports non-repetitive surge currents up to 430 A at 8.3 ms pulse width, validated per JEDEC standards with cathode polarity band marking.

Key Specifications

Pinout & Package

Package: Axial-lead Surmetic 40 plastic case (Case 017AA), void-free transfer-molded thermosetting material, corrosion-resistant finish, Pb-free compliant (G suffix), cathode indicated by band.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener voltage regulation applications.

Compared with 1N5386B and 1N5387BRL, the 1N5386BRL offers verified 180 V regulation with tape-and-reel delivery for pick-and-place integration, while maintaining identical thermal, surge, and leakage performance - making it the optimal choice for high-reliability, high-volume 180 V reference designs.

Availability

1N5386BRL is available at Aetrix Electronics and suitable for telecom line protection, industrial sensor excitation, and DC power supply overvoltage clamping requiring stable component supply, RoHS compliance, and full traceability.

Supply support for 1N5386BRL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

onsemi (Semiconductor Components Industries, LLC) is a global semiconductor supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The 1N53 Series belongs to onsemi's legacy Zener regulator product line, engineered for high-reliability voltage reference and protection in harsh environments - emphasizing tight tolerance, surge resilience, and long-term parametric stability.

FAQ

What is the nominal zener voltage and tolerance of the 1N5386BRL?

The 1N5386BRL has a nominal zener voltage of 180 V with a ±5% tolerance, as defined by the JEDEC B-suffix standard. This means its actual measured VZ at 5 mA test current falls between 171 V and 189 V under standard test conditions (TA = 25°C, 40 ±10 ms pulse). The 1N5386BRL achieves this specification using a silicon-oxide passivated junction for improved consistency and reliability.

How much power can the 1N5386BRL dissipate continuously?

The 1N5386BRL is rated for 5 W steady-state power dissipation at a lead temperature (TL) of 25°C with 3/8″ lead length. Above 25°C, it must be derated at 40 mW/°C. Its junction-to-lead thermal resistance is 25 °C/W, meaning proper heatsinking via PCB copper or chassis contact is essential to sustain full power - especially in enclosed or high-ambient environments. The 1N5386BRL's thermal performance is validated per Figure 1 and Figure 4 in the official onsemi datasheet.

What is the maximum surge current rating for the 1N5386BRL?

The 1N5386BRL supports a maximum non-repetitive surge current of 430 A at an 8.3 ms pulse width, as specified in the onsemi datasheet. This rating applies to single-event transients such as ESD or inductive kickback and is validated under JEDEC-standard test conditions. The 1N5386BRL's ability to absorb this energy without degradation makes it suitable for primary-side surge protection in industrial and telecom equipment.

Does the 1N5386BRL have a Pb-free package?

Yes, the 1N5386BRL features a Pb-free axial-lead package compliant with RoHS Directive 2011/65/EU and onsemi's Pb-Free strategy. The "G" suffix in the ordering code confirms this. The Surmetic 40 plastic case (Case 017AA) uses thermosetting material with corrosion-resistant, solderable leads - fully compatible with standard 260°C wave or hand-soldering processes for 10 seconds at 1/16″ from the case body.

What is the zener impedance of the 1N5386BRL and why does it matter?

The 1N5386BRL has a maximum zener impedance (ZZT) of 5 Ω at its 5 mA test current (IZT). This low dynamic resistance ensures minimal output voltage variation under changing load conditions - critical for stable reference generation and precision clamping. In practice, this means the 1N5386BRL maintains tighter regulation than higher-impedance Zeners when used in feedback networks or voltage monitors, directly improving system accuracy and noise rejection.