Taiwan Semiconductor Corporation 1V5KE36A

Overview

1V5KE36A from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with a breakdown voltage of 34.2–37.8 V at 1 mA test current, reverse stand-off voltage of 30.8 V, clamping voltage of 49.9 V at 30.1 A peak pulse current, and maximum junction temperature of 175°C. It protects power rails and I/O lines in industrial power supplies and motor drives against ESD and lightning-induced surges.

For engineers reviewing the 1V5KE36A datasheet, 1V5KE36A pinout, 1V5KE36A application, or 1V5KE36A equivalent, key selection criteria include its 30.8 V VRWM for 24 V nominal systems, 49.9 V VC clamping under 30.1 A surge, DO-201 mechanical compatibility, and <1 µA leakage above 10 V - critical for low-power standby circuits and robust overvoltage immunity.

Technical Context

The 1V5KE36A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 34.2–37.8 V breakdown range. Its glass-passivated junction ensures stable VBR tolerance and low incremental surge resistance, enabling fast response (<1 ns) to transients like EFT and lightning surges per IEC 61000-4-2/4-5.

Designed for single-pulse 10/1000 µs waveform compliance, it delivers 1500 W peak pulse power at 1 ms, with thermal derating to 5 W continuous power at 75°C ambient. Its DO-201 package supports lead-free soldering per J-STD-002 and meets UL 94V-0 flammability rating.

Key Specifications

Pinout & Package

DO-201 package: axial-leaded, glass-passivated, cathode-banded end. Cathode terminal marked by band; anode is unmarked lead. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ33A and 1N6284A, the 1V5KE36A provides industry-standard 1500 W surge capacity in a proven through-hole package, whereas SMBJ33A trades robustness for size, and 1N6284A offers identical functionality under JEDEC nomenclature - making 1V5KE36A optimal for high-reliability industrial power entry points.

Availability

1V5KE36A is available at Aetrix Electronics and suitable for industrial power supply protection, motor drive I/O conditioning, and lighting system surge suppression requiring stable component supply across multi-year production cycles.

Supply support for 1V5KE36A 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

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power management, protection, and signal conditioning devices.

The 1V5KExxA series is part of TSC's high-power TVS portfolio designed specifically for ruggedized overvoltage protection in industrial, automotive aftermarket, and infrastructure equipment where reliability under repetitive surge stress is mandatory.

FAQ

What is the clamping voltage of the 1V5KE36A under full-rated surge current?

The 1V5KE36A clamps to a maximum of 49.9 V when subjected to its rated peak pulse current of 30.1 A (10/1000 µs waveform). This value is measured per JEDEC standards and guarantees protection headroom for downstream 3.3 V, 5 V, or 24 V logic and power circuits. The 1V5KE36A maintains this clamping performance across its specified junction temperature range of –55°C to +175°C.

Is the 1V5KE36A unidirectional or bidirectional?

1V5KE36A is a unidirectional TVS diode, intended for DC line protection where polarity is fixed. Its cathode is marked with a band, and it conducts only during reverse overvoltage events. For bidirectional AC or floating-line applications, the variant 1V5KE36CA must be used - the "C" suffix denotes symmetrical bipolar operation with identical parameters in both directions.

What package type does the 1V5KE36A use, and is it RoHS compliant?

The 1V5KE36A uses the DO-201 axial-leaded package with pure tin-plated leads, compliant with J-STD-002 solderability requirements. It is fully RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound meets UL 94V-0 flammability rating, and the device passes JESD 201 Class 2 whisker testing - confirming suitability for industrial and automotive-grade assemblies.

Can the 1V5KE36A replace the 1N6284A in existing designs?

Yes - the 1V5KE36A and 1N6284A are functionally and mechanically identical parts from Taiwan Semiconductor, differing only in part numbering convention (manufacturer-specific vs. JEDEC standard). Both share identical VBR (34.2–37.8 V), VRWM (30.8 V), VC (49.9 V), DO-201 package, and 1500 W rating. The 1V5KE36A may be used as a direct replacement without layout or validation changes.

What is the maximum continuous power dissipation for the 1V5KE36A at elevated temperatures?

The 1V5KE36A has a maximum continuous power dissipation of 5 W at 75°C ambient temperature with 0.375 inch lead length. Derating follows a linear curve down to zero at 175°C junction temperature. This thermal profile supports use in enclosed industrial enclosures with limited airflow, provided PCB copper area and lead length are optimized per TSC's steady-state derating curve (Fig.5 in datasheet).