Taiwan Semiconductor Corporation P6KE6V8A

Overview

P6KE6V8A from STMicroelectronics is a unidirectional 600 W transient voltage suppression diode in DO-15 package, designed for primary-level ESD and surge protection in low-voltage DC circuits. It features a 6.8 V nominal breakdown voltage (V_BR = 5.8–7.14 V), 10.5 V clamping voltage at 57 A (10/1000 µs), <10 µA reverse leakage at 5.8 V, and operates up to +175 °C junction temperature - deployed in power supply input stages, USB port protection, and automotive body control modules.

For engineers reviewing the P6KE6V8A datasheet, P6KE6V8A pinout, P6KE6V8A application, or P6KE6V8A equivalent, key selection criteria include its low clamping ratio (V_CL/V_BR ≈ 1.54), high IEC 61000-4-2 immunity (30 kV contact/air discharge), thermal stability at T_j = 175 °C, and compatibility with reflow soldering per J-STD-020 MSL Level 1.

Technical Context

The P6KE6V8A uses planar junction silicon technology optimized for low dynamic resistance (R_D = 0.059 Ω) and minimal capacitance (≈1000 pF at 1 V_R, f = 1 MHz), enabling fast response to sub-100 ns transients while maintaining low leakage (<10 µA at V_RM). Its unidirectional configuration provides asymmetric clamping - forward conduction only during positive overvoltage events on the anode side.

Rated for 600 W peak pulse power (10/1000 µs) and 4 kW (8/20 µs), it delivers robust protection against IEC 61000-4-4 level 4 surges (4 kV) and MIL-STD-883 Method 3015 ESD events. The device's thermal impedance (Z_th(j-a)) is defined for FR4 PCBs with standard DO-15 footprint, supporting stable operation under repeated surge stress at elevated ambient temperatures.

Key Specifications

Pinout & Package

DO-15 (JEDEC DO-204AC) axial-leaded package: 6.05–6.75 mm body length (A), 26–31 mm lead spacing (B), 2.95–3.53 mm diameter (C), 0.71–0.88 mm lead diameter (D). Matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 E3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar TVS diode applications.

Compared with SMAJ6.8A and 1.5KE6.8A, P6KE6V8A offers optimal balance of compact DO-15 form factor, low clamping voltage, and industry-standard 600 W rating - making it preferred for cost-sensitive, space-limited consumer and automotive ECUs where precise low-voltage clamping is critical.

Availability

P6KE6V8A is available at Aetrix Electronics and suitable for USB interface protection, automotive body electronics, industrial SMPS input stages, and smart meter power supply designs requiring stable component supply across multi-year production cycles.

Supply support for P6KE6V8A 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering intelligent power, analog, MEMS, and microcontroller solutions for automotive, industrial, and consumer markets.

The P6KE series belongs to ST's high-reliability TVS diode portfolio, engineered specifically for robust electrostatic and surge protection in harsh environments - emphasizing thermal stability, low clamping variance, and compliance with UL, IEC, and AEC-Q200-aligned test protocols.

FAQ

Is P6KE6V8A suitable for bidirectional signal line protection?

No. P6KE6V8A is unidirectional and must be used with cathode tied to ground. For bidirectional protection (e.g., RS-485, CAN), select the P6KE6V8CA variant, which has symmetrical clamping and no polarity marking. Using P6KE6V8A on AC-coupled or differential lines risks forward conduction and permanent damage.

What is the maximum continuous reverse voltage (V_RM) for P6KE6V8A?

The maximum repetitive peak reverse voltage (V_RM) is 5.8 V, as specified in Table 2. This value defines the highest DC or RMS voltage the device can block without exceeding 10 µA leakage. Operating above 5.8 V risks thermal runaway and premature failure, especially at elevated temperatures.

How does junction temperature affect clamping voltage?

V_CL increases linearly with junction temperature at a coefficient α_T = 5.7 × 10⁻⁴ /°C. At T_j = 125 °C, V_CL rises ~5.7% above its 25 °C value (10.5 V → ~11.1 V). Designers must verify that elevated V_CL remains within the protected IC's absolute maximum ratings under worst-case thermal conditions.

Can P6KE6V8A be used in parallel for higher surge current handling?

Not recommended. Parameter mismatch between units causes current imbalance - one device may absorb >80% of the surge, leading to thermal failure. ST specifies single-device operation only. For higher current, select a higher-rated part (e.g., 1.5KE6.8A) or implement active crowbar circuits with current-sharing design.