Taiwan Semiconductor Corporation P4KE110CA

Overview

P4KE110CA from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in DO-204AL (DO-41) package, designed for high-energy ESD and surge protection in power rails and signal lines. It features a 110V nominal breakdown voltage (99–121V V_BR @ 1mA), 89.2V working stand-off voltage (V_WM), 158V maximum clamping voltage at 2.6A peak pulse current, and 400W peak pulse power rating per 10/1000μs waveform.

For engineers reviewing the P4KE110CA datasheet, P4KE110CA pinout, P4KE110CA application, or P4KE110CA equivalent, key selection criteria include bidirectional clamping capability, low leakage (<1μA @ 89.2V), AEC-Q101 qualification option, UL recognition (E-326243), and compatibility with automotive, industrial, and lighting systems requiring robust transient immunity.

Technical Context

The P4KE110CA operates as a voltage-clamped avalanche diode, responding to transients within 5.0ns (bidirectional mode) and delivering symmetrical clamping in both polarities. Its junction temperature range spans –55°C to +175°C, supporting operation in harsh thermal environments without derating below 125°C ambient.

It complies with ANSI/IEEE C62.35 for transient suppression and meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements. The device uses pure tin-plated leads solderable per J-STD-002 and exhibits a V_BR temperature coefficient of 0.107%/°C - critical for stable clamping across wide operating temperatures.

Key Specifications

Pinout & Package

DO-204AL (DO-41) package with axial leads; polarity indicated by cathode band (not applicable for bidirectional P4KE110CA - no polarity marking required).

Key Features

Applications

Equivalent & Alternatives

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

Compared with P4KE110CA, SMBJ110CA offers smaller footprint but reduced surge capacity, while 1.5KE110CA provides higher robustness at the cost of increased capacitance and potential overdesign - P4KE110CA balances cost, size, and 400W compliance for mainstream industrial and automotive applications.

Availability

P4KE110CA is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, LED lighting systems, and smart metering applications requiring stable component supply and long-term lifecycle support.

Supply support for P4KE110CA 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 global distribution and AEC-Q101 qualification capabilities.

The P4KE series was developed for cost-effective, high-reliability transient suppression in automotive, industrial, and consumer power systems - emphasizing robust surge handling, tight parameter tolerances, and regulatory compliance out-of-the-box.

FAQ

What is the clamping voltage of P4KE110CA and how is it measured?

The P4KE110CA has a maximum clamping voltage (V_C) of 158 V at a peak pulse current (I_PPM) of 2.6 A, tested using the standard 10/1000 μs double-exponential waveform per ANSI/IEEE C62.35. This value represents the upper limit of voltage seen downstream during a surge event, ensuring protected circuitry remains within safe operating limits. The P4KE110CA achieves this clamping performance while maintaining low dynamic impedance and sub-nanosecond response time.

Is P4KE110CA unidirectional or bidirectional, and how does that affect circuit layout?

P4KE110CA is a bidirectional TVS diode, meaning it provides symmetrical clamping in both forward and reverse polarity - no cathode band marking is used, and orientation during PCB placement is irrelevant. This simplifies layout for AC-coupled lines, differential signals, or systems where transient polarity cannot be predicted. Unlike unidirectional variants (e.g., P4KE110A), the P4KE110CA eliminates risk of incorrect orientation during assembly and supports universal placement across power and signal paths.

Does P4KE110CA meet automotive qualification standards?

The base P4KE110CA is not AEC-Q101 qualified; however, the P4KE110CAH variant (with "H" suffix) is explicitly qualified per AEC-Q101 for automotive applications. TSC documentation confirms the H-suffix version undergoes stress testing including HTGB, H3TRB, and temperature cycling - making it suitable for engine control units, body control modules, and infotainment power supplies. Always verify ordering code ends in "H" for automotive-grade use of P4KE110CA.

What is the maximum operating temperature for P4KE110CA and how does it impact derating?

P4KE110CA has a maximum junction temperature (T_J) of +175°C and operates from –55°C to +175°C. Its steady-state power dissipation (P_D) is 1 W at 75°C lead temperature, derating linearly above that per Figure 2 in the datasheet. At 125°C ambient, P_D drops to ~0.5 W - but since P4KE110CA is intended for transient (not continuous) duty, its 400W surge rating remains valid regardless of ambient, provided thermal mass and PCB copper area meet TSC's 5×5 mm pad recommendation per lead.

How does P4KE110CA compare to P4KE110A in terms of electrical performance?

P4KE110CA is bidirectional with symmetrical V_BR (99–121 V) and clamping in both directions, while P4KE110A is unidirectional with a cathode band and same V_BR range but only clamps in reverse. Their V_WM (89.2 V), V_C (158 V), and I_PPM (2.6 A) are identical under reverse bias, but P4KE110A conducts forward surge up to 40 A (IFSM), whereas P4KE110CA does not specify forward conduction - making P4KE110A preferable for DC rail protection with known polarity, and P4KE110CA for AC or polarity-agnostic protection.