Taiwan Semiconductor Corporation P6KE350C

Overview

P6KE350C from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power rails and signal lines. It features a 350V nominal standoff voltage, 504V maximum clamping voltage at 1.2A peak pulse current, 600W peak pulse power rating (10/1000μs), and DO-204AC (DO-15) axial package - deployed in industrial power supplies to safeguard rectifier outputs against lightning-induced surges.

For engineers reviewing the P6KE350C datasheet, P6KE350C pinout, P6KE350C application, or P6KE350C equivalent, key selection criteria include verified bidirectional clamping behavior, temperature coefficient of VBR (0.110%/°C), junction capacitance <100pF at VR=0V, and AEC-Q101 qualification status - all confirmed for this specific variant.

Technical Context

The P6KE350C operates as a silicon avalanche diode with symmetrical breakdown characteristics in both polarities, enabling robust protection of AC-coupled or floating circuits without polarity dependency. Its 315–385V breakdown voltage range (VBR min/max at 1mA IT) ensures reliable triggering across manufacturing tolerances and temperature drift.

It delivers 504V clamping voltage (VC) at 1.2A IPP under standardized 10/1000μs waveform, with sub-nanosecond response (<5ns for bidirectional mode) and low dynamic impedance - critical for limiting voltage overshoot during fast transients like EFT or inductive switching events.

Key Specifications

Pinout & Package

DO-204AC (DO-15) axial package with cathode band marking omitted for bidirectional configuration; terminals are non-polarized and functionally identical in both directions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with P6KE350C, SMAJ350A offers surface-mount convenience but sacrifices bidirectional capability and requires polarity management, while 1.5KE350C matches electrical performance but demands PCB rework for package compatibility - making P6KE350C optimal for new through-hole designs prioritizing simplicity and bipolar robustness.

Availability

P6KE350C is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, LED driver systems, and sensor interface protection requiring stable component supply and long-term lifecycle support.

Supply support for P6KE350C 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, and rectifiers with ISO/TS 16949 and AEC-Q200 certified production lines.

The P6KE series was engineered for high-reliability surge immunity in harsh environments - targeting industrial automation, automotive subsystems, and infrastructure equipment where 600W transient absorption and AEC-Q101 compliance are mandatory.

FAQ

What is the clamping voltage of P6KE350C and how is it measured?

The P6KE350C has a maximum clamping voltage (VC) of 504 V, measured at 1.2 A peak pulse current (IPP) under the standardized 10/1000 μs double-exponential surge waveform per ANSI/IEEE C62.35. This value is guaranteed across temperature and unit variation, ensuring predictable voltage limiting during real-world transients such as lightning-induced surges or inductive switching events.

Is P6KE350C unidirectional or bidirectional, and how does that affect circuit design?

P6KE350C is a bidirectional TVS diode, meaning it provides symmetrical clamping in both polarities without polarity marking or orientation dependency. This eliminates the need for directional placement on PCBs and simplifies protection of AC-coupled, floating, or differential signal paths - unlike unidirectional variants such as P6KE350A, which require correct anode/cathode alignment.

Does P6KE350C meet automotive qualification standards?

The base P6KE350C is not AEC-Q101 qualified; however, the variant P6KE350CH (with "H" suffix) is fully AEC-Q101 qualified and intended for automotive under-hood applications. Engineers selecting P6KE350C for automotive use must specify the "H" version to ensure compliance with stress testing requirements including temperature cycling, humidity bias, and mechanical shock.

What is the maximum operating temperature for P6KE350C and how does derating work?

P6KE350C has a maximum junction temperature (TJ) of +175°C and is rated for 600W peak pulse power at TA = 25°C. Power must be derated linearly above 25°C per the manufacturer's pulse derating curve (Fig.2), reaching ~50% capacity at +100°C ambient - critical for thermal design in enclosed industrial enclosures or engine bay environments.

How does the junction capacitance of P6KE350C impact high-frequency signal lines?

P6KE350C exhibits typical junction capacitance below 100 pF at 0 V bias (measured at 1 MHz), making it suitable for protecting low-speed analog and power rails but not recommended for RF or high-speed digital lines (>10 Mbps) where capacitive loading could distort signal edges. For such applications, lower-capacitance TVS arrays or specialized ESD protection devices should be considered instead of P6KE350C.