Taiwan Semiconductor Corporation P4KE75C

Overview

P4KE75C 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 75V nominal standoff voltage, 67.5–82.5V breakdown range at 1mA test current, 60.7V working peak reverse voltage, and clamps transients to ≤108V at 3.8A peak pulse current under 10/1000μs waveform - deployed in automotive lighting control modules and industrial sensor interfaces.

For engineers reviewing the P4KE75C datasheet, P4KE75C pinout, P4KE75C application, or P4KE75C equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification (H-suffix variant), DO-41 package compatibility, and compliance with IEC 61000-4-4 EFT immunity requirements.

Technical Context

The P4KE75C operates as a silicon avalanche diode with symmetrical bidirectional conduction - enabling protection of AC-coupled or floating signal paths without polarity concerns. Its low dynamic impedance ensures rapid voltage clamping during fast-rising transients (≤5.0ns response time), while its 400W peak pulse power rating sustains energy surges per ANSI/IEEE C62.35 10/1000μs waveform.

Thermal design is constrained by a 175°C maximum junction temperature and 1W steady-state power dissipation at 75°C lead temperature. The device exhibits a +0.105%/°C temperature coefficient of VBR, requiring derating in high-ambient environments; reverse leakage remains ≤1μA at 60.7V.

Key Specifications

Pinout & Package

DO-204AL (DO-41) package: axial-leaded, glass-passivated silicon junction, cathode band not marked on bidirectional variants (P4KE75C). Leads are pure tin-plated and solderable per J-STD-002.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ75CA and 1.5KE75CA, the P4KE75C delivers optimal balance of through-hole manufacturability, 400W surge handling, and DO-41 footprint compatibility - making it ideal for cost-sensitive automotive and industrial control boards where leaded assembly remains standard.

Availability

P4KE75C is available at Aetrix Electronics and suitable for automotive lighting systems, industrial CAN networks, smart building sensor nodes, and AC-DC adapter input stages requiring stable component supply and long-term obsolescence management.

Supply support for P4KE75C 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 - headquartered in Hsinchu, Taiwan, with ISO/TS 16949 and AEC-Q200 certified production lines.

The P4KE Series targets cost-effective, high-reliability transient suppression in automotive, industrial, and consumer power systems - engineered for robustness under repetitive surge stress and extended temperature cycling.

FAQ

What is the polarity configuration of P4KE75C?

The P4KE75C is a bidirectional TVS diode with symmetrical avalanche characteristics in both forward and reverse directions. Unlike unidirectional variants (e.g., P4KE75), it has no cathode band marking and does not require orientation during PCB placement - making it ideal for AC-coupled or floating signal protection where polarity is undefined or alternating.

Does P4KE75C meet AEC-Q101 qualification?

The base P4KE75C is not AEC-Q101 qualified; however, the P4KE75CH variant - identical in electrical specs but with added automotive stress screening - is fully AEC-Q101 compliant. Engineers designing for under-hood automotive applications should specify P4KE75CH to ensure qualification for temperature cycling, humidity bias, and mechanical shock testing per AEC standards.

What is the maximum clamping voltage of P4KE75C under surge conditions?

The P4KE75C clamps to a maximum of 108 V when subjected to its rated 3.8 A peak pulse current under the standard 10/1000 μs double-exponential waveform. This value is guaranteed across the full operating temperature range and represents the highest voltage the protected circuit will experience during a 400W transient event.

How does P4KE75C compare to P4KE75A in terms of voltage tolerance?

The P4KE75C has a breakdown voltage range of 67.5–82.5 V at 1 mA, while the P4KE75A offers tighter tolerance: 71.3–78.8 V. The "C" suffix denotes standard-grade tolerance (±10%), whereas "A" indicates ±5% - making P4KE75A preferable where precise clamping onset is critical, such as in regulated power supply feedback paths.

Can P4KE75C be used in place of a unidirectional TVS like P4KE75?

Yes, P4KE75C can replace P4KE75 in most applications, but with important trade-offs: it provides identical clamping performance in reverse bias, yet conducts in forward bias above ~1.5 V - potentially loading low-voltage logic lines. Use P4KE75C only where bidirectional protection is needed or where forward conduction is irrelevant (e.g., AC signal lines or floating grounds).