Taiwan Semiconductor Corporation P4KE47CA

Overview

P4KE47CA from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It features a 47V nominal standoff voltage, 400W peak pulse power rating at 10/1000μs waveform, clamping voltage of 67.8V at 6.2A peak pulse current, and operates across –55°C to +175°C junction temperature range - deployed in automotive lighting control modules and industrial PLC I/O protection circuits.

For engineers reviewing the P4KE47CA datasheet, P4KE47CA pinout, P4KE47CA application, or P4KE47CA equivalent, key selection criteria include bidirectional clamping capability, low leakage (<1μA at 38.1V), fast response time (<5ns), DO-41 package compatibility, and AEC-Q101 qualification status for automotive-grade reliability validation.

Technical Context

The P4KE47CA implements a silicon avalanche diode structure optimized for bidirectional transient suppression. Its breakdown voltage is specified at 42.3–51.7V with 1mA test current, and it maintains stable clamping performance up to 175°C junction temperature while meeting ANSI/IEEE C62.35 surge waveform standards.

It delivers 400W non-repetitive peak pulse power under 10/1000μs waveform, with maximum clamping voltage of 67.8V at 6.2A peak pulse current. Reverse leakage remains below 1μA at its 38.1V working stand-off voltage, ensuring minimal standby power loss in protected circuits.

Key Specifications

Pinout & Package

Package: DO-204AL (DO-41) - axial-leaded, glass-passivated, RoHS-compliant package with pure tin-plated leads solderable per J-STD-002; meets UL 94V-0 flammability rating and JESD201 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 SMBJ47CA and 1.5KE47CA, the P4KE47CA provides the best trade-off of axial-leaded manufacturability, AEC-Q101 qualification, and 400W surge handling in cost-sensitive automotive and industrial applications - avoiding SMT reflow complexity while exceeding basic IEC 61000-4-5 Level 3 requirements.

Availability

P4KE47CA is available at Aetrix Electronics and suitable for automotive lighting systems, industrial PLC I/O modules, smart building HVAC controls, and telecom power interface designs requiring stable component supply and long-term lifecycle support.

Supply support for P4KE47CA 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 global distribution and AEC-Q101 validation capabilities.

The P4KE series was developed specifically for cost-effective, high-reliability transient protection in automotive and industrial environments - emphasizing robustness, standardized DO-41 compatibility, and full bidirectional performance without orientation dependency.

FAQ

What does the 'CA' suffix indicate in P4KE47CA?

The 'CA' suffix in P4KE47CA denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities, with identical breakdown and clamping characteristics regardless of voltage polarity applied. This eliminates the need for polarity-specific placement during assembly and simplifies design for AC-coupled or floating signal lines. The P4KE47CA achieves this using a back-to-back diode structure housed in a single DO-41 package.

Is P4KE47CA AEC-Q101 qualified?

Yes, the P4KE47CA is AEC-Q101 qualified when ordered with the 'H' suffix (e.g., P4KE47CAH). The base P4KE47CA part meets all electrical and mechanical specifications of the AEC-Q101 standard, and Taiwan Semiconductor certifies the H-suffix variant for automotive use. For production automotive applications, specify P4KE47CAH to ensure full qualification documentation and lot traceability aligned with IATF 16949 requirements.

What is the maximum clamping voltage of P4KE47CA and at what current?

The maximum clamping voltage of P4KE47CA is 67.8V, measured at a peak pulse current (IPPM) of 6.2A under the standard 10/1000μs double-exponential waveform. This value represents the upper limit of voltage seen by downstream circuitry during a worst-case surge event, making it critical for verifying compatibility with the absolute maximum ratings of protected ICs such as microcontrollers, transceivers, or power switches.

Can P4KE47CA replace unidirectional P4KE47A in existing designs?

No, P4KE47CA cannot directly replace unidirectional P4KE47A without circuit review. While both share the same VWM (38.1V) and VBR range (42.3–51.7V), the P4KE47CA is bidirectional and lacks polarity marking, whereas P4KE47A is unidirectional with a cathode band. Substitution may cause unintended conduction paths in DC-biased circuits. If bidirectional protection is required, confirm system topology supports symmetrical clamping before adopting P4KE47CA.

What is the junction-to-ambient thermal resistance (RθJA) for P4KE47CA in DO-41 package?

Taiwan Semiconductor does not publish a specific RθJA value for P4KE47CA in the DO-41 package because thermal performance depends heavily on PCB layout - particularly copper pad area and trace width. The datasheet specifies steady-state power dissipation as 1W at TL = 75°C with 0.375" (9.5mm) lead lengths and 5×5 mm copper pads per terminal. For accurate thermal modeling, users must perform board-level thermal simulation or empirical measurement under actual mounting conditions.