onsemi 1N6380RL4

Overview

1N6380RL4 from onsemi is a unidirectional 1500 W peak power TVS diode designed to protect voltage-sensitive circuits from high-energy transients. It features a 36 V working peak reverse voltage (VRWM), clamps at ≤65.2 V @ 23 A IPP, exhibits <2 µA leakage at VRWM, responds in <1 ns, and is housed in an axial lead Surmetic plastic package (Case 41A). It is deployed in industrial power supplies and medical equipment input stages.

For engineers reviewing the 1N6380RL4 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin vs. protected IC V_MAX, surge current capability under 1 ms pulse conditions, thermal derating above 75°C lead temperature, and Pb-free soldering compatibility at 260°C for 10 seconds.

Technical Context

The 1N6380RL4 operates as a unidirectional transient voltage suppressor, leveraging Zener avalanche breakdown to clamp fast-rising overvoltage events. Its low dynamic impedance ensures stable clamping across 23 A peak pulse current, while its <1 ns response time minimizes overshoot before conduction begins.

Designed for parallel protection of DC rails, it requires external series impedance (e.g., fuse or resistor) to limit fault current during clamping. Thermal performance is governed by junction-to-lead resistance (20 °C/W) and steady-state power dissipation (5.0 W @ TL ≤ 75°C), with linear derating above that temperature.

Key Specifications

Pinout & Package

Package: Axial lead, Surmetic thermosetting plastic case (ON Semiconductor Case 41A), cathode indicated by polarity band. Dimensions: A = 8.5–9.5 mm length, B = 4.8–5.3 mm diameter, D = 0.96–1.06 mm lead diameter.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient suppression applications.

Compared with SMBJ36A and 1.5KE36A, the 1N6380RL4 delivers superior surge handling per unit volume due to its optimized Surmetic axial construction, lower leakage, and tighter thermal resistance - making it preferred for high-reliability industrial and medical applications demanding repeatable 1500 W suppression.

Availability

1N6380RL4 is available at Aetrix Electronics and suitable for industrial power supplies, medical diagnostic equipment, programmable logic controllers, and automated test equipment requiring stable component supply and long-term obsolescence management.

Supply support for 1N6380RL4 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 supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The 1N6380RL4 belongs to onsemi's Mosorb TVS family, engineered specifically for high-energy transient suppression in harsh industrial and medical environments where reliability, surge margin, and thermal stability are critical.

FAQ

What is the clamping voltage of the 1N6380RL4 under maximum rated surge current?

The 1N6380RL4 clamps to a maximum of 65.2 V when subjected to its rated peak pulse current of 23 A (1 ms waveform). This value is measured per Figure 5 in the official datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case transient events. The 1N6380RL4 maintains this clamping performance across ambient temperatures from −65°C to +175°C, with minor derating above 25°C per Figure 1.

Is the 1N6380RL4 RoHS compliant and compatible with lead-free soldering processes?

Yes, the 1N6380RL4 is a Pb-Free device manufactured in onsemi's Surmetic axial package. It supports lead-free reflow and hand-soldering at 260°C for 10 seconds at 1/16″ from the case, per J-STD-020 and JEDEC standards. The "RL4" suffix explicitly denotes Pb-Free compliance, and the device meets RoHS Directive 2011/65/EU requirements without exemptions.

How does the 1N6380RL4 differ from bidirectional TVS diodes like P6KE36CA?

The 1N6380RL4 is unidirectional and blocks reverse voltage up to 36 V while conducting only positive transients - making it ideal for DC rail protection. In contrast, P6KE36CA clamps both polarities symmetrically, which introduces leakage and capacitance penalties in DC applications. The 1N6380RL4 achieves lower leakage (<2 µA) and faster response than comparable bidirectional parts, enhancing efficiency and noise immunity in single-polarity systems.

Can the 1N6380RL4 be used in AC line protection applications?

No - the 1N6380RL4 is strictly unidirectional and unsuitable for AC line protection without external rectification. Its 36 V VRWM is rated for DC or peak AC voltage; applying full-wave AC would cause conduction during negative half-cycles, leading to thermal runaway. For AC mains protection, use bidirectional variants such as 1N6380 or paired unidirectional devices with bridge configuration - never substitute 1N6380RL4 directly into AC line positions.

What is the thermal resistance and steady-state power rating of the 1N6380RL4?

The 1N6380RL4 has a junction-to-lead thermal resistance (R_JL) of 20 °C/W and a steady-state power dissipation of 5.0 W at lead temperature (T_L) ≤ 75°C. Power must be linearly derated above 75°C at 20 mW/°C, reaching zero at 100°C T_L. This thermal profile assumes 3/8″ lead length and free-air convection - forced airflow or heatsinking is not supported due to axial package constraints.