onsemi 1N5381BRLG

Overview

1N5381BRLG from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 130 V, ±5% tolerance, 10 Ω maximum zener impedance at 190 mA test current, and 0.5 mA maximum leakage current at 98.8 V. It delivers stable voltage regulation in high-voltage power supply rails and transient suppression circuits operating up to +150°C junction temperature.

For engineers reviewing the 1N5381BRLG datasheet, pinout, applications, or equivalent options, key selection criteria include its 130 V nominal breakdown, 190 mA maximum DC zener current, 180 W surge rating at 8.3 ms, ESD Class 3 (>16 kV HBM), and Pb-free Surmetic™ 40 plastic package.

Technical Context

This device operates as a precision voltage reference and overvoltage clamp using a silicon-oxide passivated junction. Its regulation behavior is defined at two test currents (10% and 50% of IZM), with thermal resistance θ_JL = 25 °C/W and derating starting above 25°C at 40 mW/°C.

The 1N5381BRLG exhibits a positive temperature coefficient typical of high-voltage Zeners (>100 V), with measured θ_VZ ≈ +0.085 %/°C per Figure 3. It supports non-repetitive surge currents up to 1250 A at 8.3 ms pulse width, validated per JEDEC standards.

Key Specifications

Pinout & Package

Package: Axial-lead Surmetic™ 40 plastic case (JEDEC CASE 017AA), void-free transfer-molded thermosetting material, cathode indicated by band. Dimensions: 8.38–8.89 mm length × 3.30–3.68 mm diameter, 25.4–31.75 mm lead length.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N5381BRLG, the 1N5381BRL offers identical regulation but lacks Pb-free certification, while the SMCJ130A trades regulation stability for faster response and higher surge energy handling - making it unsuitable as a direct replacement in reference or bias applications.

Availability

1N5381BRLG is available at Aetrix Electronics and suitable for industrial power supplies, automotive transient suppression, high-voltage reference design, and telecom line protection requiring stable component supply and full RoHS compliance.

Supply support for 1N5381BRLG 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The 1N53 Series belongs to onsemi's legacy Zener regulator portfolio, engineered for high-reliability voltage reference and clamping in cost-sensitive, high-volume power management systems where precision, surge resilience, and long-term stability are critical.

FAQ

What is the nominal zener voltage and tolerance of the 1N5381BRLG?

The 1N5381BRLG has a nominal zener voltage of 130 V with a guaranteed tolerance of ±5%, corresponding to a minimum of 123.5 V and maximum of 136.5 V at I_ZT = 190 mA. This tolerance is specified per JEDEC standard and applies to all B-suffix devices in the 1N53 series. The 1N5381BRLG achieves this tight tolerance via silicon-oxide passivation and 100% electrical screening during manufacturing.

Can the 1N5381BRLG be used in surface-mount designs?

No, the 1N5381BRLG is an axial-lead device housed in the Surmetic™ 40 plastic package (JEDEC CASE 017AA) and is not compatible with surface-mount assembly processes. It requires through-hole mounting with 25.4–31.75 mm lead length and manual or wave soldering at 260°C for 10 seconds at 1/16 inch from case. For SMT alternatives, consider the SMAJ130A or SMCJ130A TVS diodes - though these lack precision regulation capability.

What is the maximum steady-state power dissipation for the 1N5381BRLG?

The 1N5381BRLG has a maximum steady-state power dissipation of 5 W at lead temperature (T_L) = 25°C, with linear derating of 40 mW/°C above that temperature. This rating assumes 3/8-inch lead length to heatsink and defines the upper limit for continuous DC power handling before thermal runaway risk increases. Actual usable power depends on PCB copper area, airflow, and ambient conditions.

How does the 1N5381BRLG perform under surge conditions?

The 1N5381BRLG supports a non-repetitive peak surge current of 1250 A at 8.3 ms pulse width, validated per JEDEC test methods. Its 180 W surge rating reflects energy absorption capability (I²t ≈ 12.5 A²·s), enabling compliance with IEC 61000-4-5 surge immunity requirements. Performance remains stable provided pulse duty cycle is low and junction temperature stays within −65°C to +200°C limits.

Is the 1N5381BRLG RoHS compliant and halogen-free?

Yes, the 1N5381BRLG is RoHS compliant and Pb-free, as confirmed by the "G" suffix in its part number and onsemi's official documentation. It meets EU Directive 2011/65/EU and contains no intentionally added halogens. Full material declarations and test reports are available through onsemi's compliance portal, and the device carries the Surmetic™ 40 package marking indicating Pb-free construction.