STMicroelectronics P6KE6V8ARL

Overview

P6KE6V8ARL 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 power rails and signal lines. It features a 6.8 V breakdown voltage (V_BR = 6.45–7.14 V), 10.5 V clamping voltage (V_CL) at 57 A peak pulse current (I_PP), and operates up to +175 °C junction temperature - deployed in industrial power supplies and automotive body control modules.

For engineers reviewing the P6KE6V8ARL datasheet, P6KE6V8ARL pinout, P6KE6V8ARL application, or P6KE6V8ARL equivalent, key selection criteria include its 6.8 V standoff rating, 10/1000 µs 600 W pulse capability, low dynamic resistance (0.059 Ω), IEC 61000-4-2 ±30 kV ESD robustness, and DO-15 mechanical compatibility with legacy through-hole layouts.

Technical Context

This unidirectional TVS diode uses planar silicon junction technology optimized for low leakage (<10 µA at 5.8 V) and stable clamping performance across -55 °C to +175 °C. Its thermal design supports high-reliability operation in SMPS front-end inputs where sustained junction temperatures exceed 150 °C.

The device delivers precise voltage limiting via sharp avalanche turn-on at V_BR, with clamping voltage defined by V_CL = V_BR(max) + R_D × I_PP. Its 0.059 Ω dynamic resistance ensures minimal voltage overshoot during fast 8/20 µs surges up to 298 A.

Key Specifications

Pinout & Package

DO-15 (JEDEC DO-204AC) axial-leaded package with cathode band marking. Leads are matte tin-plated for solderability and RoHS compliance. Mechanical dimensions: length 26–31 mm, body diameter 2.95–3.53 mm, lead diameter 0.71–0.88 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ6.8A and 1N6263A, P6KE6V8ARL offers optimal balance of DO-15 compatibility, ±30 kV ESD immunity, and UL-certified safety - making it preferred for new designs requiring field-proven through-hole robustness without SMT conversion.

Availability

P6KE6V8ARL is available at Aetrix Electronics and suitable for industrial power supply input protection, automotive body control modules, and consumer AC-DC adapter outputs requiring stable component supply across multi-year production cycles.

Supply support for P6KE6V8ARL 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 industrial, automotive, and consumer markets.

P6KE6V8ARL belongs to the P6KE series - a family of planar-junction TVS diodes engineered specifically for high-temperature, high-reliability surge protection in space-constrained power and interface circuits.

FAQ

What is the maximum clamping voltage of P6KE6V8ARL under a 10/1000 µs surge?

The maximum clamping voltage is 10.5 V at 57 A peak pulse current under 10/1000 µs waveform conditions, measured at T_amb = 25 °C. This value increases linearly with junction temperature using α_T = 5.7 × 10⁻⁴/°C per the datasheet's V_CL vs. T_j formula.

Can P6KE6V8ARL be used in bidirectional signal line protection?

No - P6KE6V8ARL is unidirectional (denoted by "A" suffix) and must be connected with cathode to ground. For bidirectional protection, use P6KE6V8CARL (CA suffix), which has symmetrical breakdown in both polarities and identical V_BR and V_CL specifications.

Is P6KE6V8ARL compliant with lead-free soldering standards?

Yes - it meets J-STD-020 MSL level 1 and supports ST's recommended reflow profile with peak temperature of 240–245 °C for 60 seconds. Matte tin plating ensures compatibility with Pb-free SAC305 solder and avoids whisker formation per JESD201 Class 2.

How does junction temperature affect leakage current in P6KE6V8ARL?

Leakage current rises exponentially with temperature: at V_RM = 5.8 V, I_RM is ≤10 µA at 25 °C but reaches ~1000 nA at 125 °C and ~10,000 nA at 175 °C, as shown in Figure 9 of DS0681. This remains within safe limits for most 5 V rail applications.