onsemi 1N5380BRL

Overview

1N5380BRL from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 120 V, ±5% tolerance, 10 mA test current (IZT), and maximum zener impedance of 10 Ω at IZT - designed for precision voltage regulation in high-voltage DC power supply rails, overvoltage clamping circuits, and reference voltage generation in industrial control systems.

For engineers reviewing the 1N5380BRL datasheet, pinout, applications, or equivalent options, key selection criteria include its 120 V nominal zener voltage, 10 Ω dynamic impedance at 10 mA, 170 A surge rating at 8.3 ms, 5 W steady-state power dissipation, and axial lead (Case 017AA) package compatibility with through-hole PCB layouts.

Technical Context

This device operates as a silicon-oxide passivated junction Zener regulator, optimized for stable reverse-biased breakdown under DC and transient conditions. Its thermal design relies on junction-to-lead conduction (θJL = 25 °C/W), with derating above 25 °C at 40 mW/°C, and supports mounting in any orientation.

The 1N5380BRL exhibits a positive temperature coefficient (~0.13 mV/°C per volt, extrapolated from Figure 3 for 120 V units), low leakage (<0.5 μA at 91.2 V), and tight regulation with voltage change ≤±5% across 10–50% of IZM - enabling predictable behavior in temperature-variable environments without external compensation.

Key Specifications

Pinout & Package

Package: Axial-lead, transfer-molded plastic (Case 017AA), cathode indicated by band. Dimensions: 8.38–8.89 mm length × 3.30–3.68 mm diameter; leads 25.4–31.75 mm long, solderable up to 260°C for 10 s at 1/16″ from case.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N5380BRL, the 1N5380B offers identical regulation performance but lacks tape-and-reel convenience for high-volume production, while SMF120A trades power handling and impedance for miniaturization - making 1N5380BRL the sole option for robust 5 W, low-impedance 120 V regulation in through-hole designs.

Availability

1N5380BRL is available at Aetrix Electronics and suitable for industrial power supplies, relay driver protection circuits, high-voltage instrumentation references, and field-deployable sensor signal conditioning requiring stable component supply and long-lifecycle support.

Supply support for 1N5380BRL 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 (formerly ON Semiconductor) is a global semiconductor manufacturer specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The 1N53 Series belongs to onsemi's Surmetic™ 40 Zener regulator family - engineered for high-reliability voltage reference and clamping in harsh industrial environments with guaranteed six-parameter specifications and Pb-free compliance.

FAQ

What is the nominal zener voltage and tolerance of the 1N5380BRL?

The 1N5380BRL has a nominal zener voltage of 120 V with a ±5% tolerance, meaning its actual breakdown voltage falls between 114 V and 126 V at the specified test current of 10 mA. This tolerance is guaranteed per JEDEC standards and applies to all B-suffix devices in the 1N53 series, ensuring predictable regulation across production lots without binning.

How much power can the 1N5380BRL dissipate continuously, and how does temperature affect this?

The 1N5380BRL 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 - for example, at TL = 75°C, maximum allowable power drops to 3 W. This derating ensures junction temperature remains within the −65°C to +200°C operating range, with DC operation limited to 150°C max.

What is the maximum surge current rating for the 1N5380BRL, and under what conditions is it specified?

The 1N5380BRL is rated for a maximum non-repetitive surge current of 170 A at a pulse width of 8.3 ms, per the datasheet's Figure 5 and Note 4. This rating assumes a single square-wave pulse under TA = 25°C conditions with mounting contacts located 3/8″ to 1/2″ from the diode body - validating its suitability for absorbing inductive switching transients and ESD events.

Does the 1N5380BRL have a specified zener impedance, and why does it matter?

Yes, the 1N5380BRL has a maximum zener impedance (ZZT) of 10 Ω measured at 10 mA test current (IZT). This low dynamic resistance ensures minimal voltage variation under changing load currents - critical for maintaining regulation accuracy in power supply feedback loops or precision reference circuits where even small ΔI_Z would otherwise cause unacceptable ΔV_Z.

Is the 1N5380BRL RoHS-compliant, and what does the "RL" suffix indicate?

Yes, the 1N5380BRL is Pb-free and RoHS-compliant, as confirmed by the "G" suffix in onsemi's ordering nomenclature and explicit mention in the datasheet's Mechanical Characteristics section. The "RL" suffix denotes tape-and-reel packaging (4000 units per reel), optimized for automated pick-and-place assembly - distinct from the "B" suffix (1000 units per box) used for bulk packaging.