Taiwan Semiconductor Corporation 1V5KE8V2A

Overview

1V5KE8V2A from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with breakdown voltage 7.79–8.61 V at 10 mA, reverse stand-off voltage 7.02 V, clamping voltage 12.1 V at 200 A peak pulse current, and junction temperature range −55 °C to +175 °C. It protects power rails and I/O lines in industrial power supplies, motor drives, and automotive body electronics against ESD and inductive switching transients.

For engineers reviewing the 1V5KE8V2A datasheet, 1V5KE8V2A pinout, 1V5KE8V2A application, or 1V5KE8V2A equivalent, key selection criteria include its 7.02 V VRWM for 5 V rail compatibility, 12.1 V VC clamping under 200 A surge, DO-201 mechanical robustness, low IR (<1 µA above 10 V), and RoHS/halogen-free compliance for high-reliability embedded systems.

Technical Context

The 1V5KE8V2A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified VBR window (7.79–8.61 V). Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance during 10/1000 µs transients.

Designed for single-pulse suppression per JEDEC standards, it delivers 1500 W peak pulse power at 1 ms, with thermal derating above 75 °C ambient and full operation up to TJ = 175 °C. Polarity is marked by cathode band; bidirectional variants use "C" suffix (e.g., 1V5KE8V2CA).

Key Specifications

Pinout & Package

Package: DO-201 axial-leaded plastic case with pure tin-plated leads (J-STD-002 compliant), UL 94V-0 molding compound, and cathode band marking for polarity identification. Weight ≈ 0.090 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ8.0A and P6KE8.2A, the 1V5KE8V2A provides 2.5× higher peak pulse power in DO-201, enabling robust protection in high-inductance industrial loads without derating, while maintaining tighter VBR tolerance and lower leakage critical for precision 5 V systems.

Availability

1V5KE8V2A is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, LED lighting drivers, and ESD-sensitive interface circuits requiring stable component supply and long-lifecycle support.

Supply support for 1V5KE8V2A 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs, with ISO 9001 and IATF 16949 certification.

The 1V5KE series targets high-reliability transient suppression in harsh environments, emphasizing rugged packaging (DO-201), extended temperature operation, and consistent clamping performance across production lots.

FAQ

What is the maximum clamping voltage of the 1V5KE8V2A under standard test conditions?

The 1V5KE8V2A has a maximum clamping voltage (VC) of 12.1 V when subjected to a 10/1000 µs waveform with a peak pulse current (IPPM) of 200 A, measured at TA = 25 °C. This value is guaranteed per the manufacturer's electrical specifications table and defines the upper voltage limit imposed on protected circuitry during surge events. The 1V5KE8V2A maintains this clamping performance across its full operating temperature range.

Is the 1V5KE8V2A suitable for bidirectional transient suppression?

No, the 1V5KE8V2A is a unidirectional TVS diode. For bidirectional protection, the designated variant is 1V5KE8V2CA (with "C" suffix), which provides symmetrical clamping in both polarities. Using the 1V5KE8V2A in reverse-biased configurations risks permanent breakdown, as its anode is not rated for sustained reverse voltage. Always verify polarity marking-the cathode band must face the protected line.

What is the reverse leakage current specification for the 1V5KE8V2A at its rated VRWM?

At its reverse stand-off voltage (VRWM) of 7.02 V and TA = 25 °C, the 1V5KE8V2A exhibits a typical reverse leakage current (IR) of less than 1 µA. This ultra-low leakage ensures minimal power loss in always-on systems and avoids false triggering in high-impedance sensing nodes. The specification is verified per JEDEC test conditions and remains valid up to TJ = 125 °C.

Does the 1V5KE8V2A comply with RoHS and halogen-free requirements?

Yes, the 1V5KE8V2A is RoHS compliant and halogen-free per IEC 61249-2-21. Its molding compound meets UL 94V-0 flammability rating, and its pure tin-plated leads satisfy J-STD-002 solderability requirements. These qualifications are confirmed in the official Taiwan Semiconductor datasheet revision D2112 and apply to all units shipped under standard ordering codes (e.g., 1V5KE8V2A, 1V5KE8V2A0G).

What is the recommended PCB layout practice for optimal surge performance of the 1V5KE8V2A?

To maximize surge suppression effectiveness, route the 1V5KE8V2A with minimal trace length between the protected node and ground plane-ideally ≤5 mm-and use wide, low-inductance copper pours. Avoid vias in the main current path; place the device directly adjacent to the connector or IC input. The 1V5KE8V2A's DO-201 axial package requires proper lead forming to prevent mechanical stress; maintain ≥1.5 mm clearance to adjacent conductors per IPC-2221.