onsemi P6KE27ARL

Overview

P6KE27ARL from STMicroelectronics is a unidirectional 600 W transient voltage suppression diode in DO-15 package, with 27 V breakdown voltage (V_BR = 25.7–28.4 V), 37.5 V clamping voltage (V_CL) at 16 A peak pulse current, and 0.569 Ω dynamic resistance - designed for primary-level surge protection in DC power rails and signal lines of industrial power supplies and telecom interfaces.

For engineers reviewing the P6KE27ARL datasheet, P6KE27ARL pinout, P6KE27ARL application, or P6KE27ARL equivalent, key selection criteria include its 175 °C maximum junction temperature, 30 kV ESD immunity (IEC 61000-4-2), 4 kV EFT robustness (IEC 61000-4-4), low leakage (<0.5 µA at 23 V), and compatibility with lead-free reflow per J-STD-020 MSL level 1.

Technical Context

The P6KE27ARL operates as a silicon avalanche diode that clamps transient overvoltages above its reverse standoff voltage (V_RWM = 23 V) by entering avalanche breakdown. Its planar junction structure ensures stable V_BR temperature coefficient (α_T = 9.6 × 10⁻⁴/°C) and low capacitance (<1000 pF at 1 V).

It delivers 600 W peak pulse power under 10/1000 µs waveform at 25 °C ambient, derating to 300 W at T_j = 175 °C. The device sustains non-repetitive forward surge currents up to 100 A (10 ms, T_j initial = 25 °C) and meets UL 497B, IEC 61000-4-2/4-4, and MIL-STD-883 Class H reliability standards.

Key Specifications

Pinout & Package

DO-15 (JEDEC DO-204AC) axial-leaded package with cathode band marking; body length 26–31 mm, diameter 2.95–3.53 mm, lead diameter 0.71–0.88 mm; matte tin-plated leads compliant with J-STD-002 and whisker-tested per JESD-201 Class 2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ27A and 1.5KE27A, P6KE27ARL offers optimal balance of axial-leaded serviceability, low-cost through-hole assembly, and sufficient 600 W surge capacity for industrial DC rail protection - making it ideal for cost-sensitive, medium-energy applications where DO-15 mechanical robustness is valued.

Availability

P6KE27ARL is available at Aetrix Electronics and suitable for industrial power supplies, RS-485 communication interfaces, and telecom line cards requiring stable component supply, long-term lifecycle support, and compliance with UL 497B and IEC 61000-4-2/4-4 standards.

Supply support for P6KE27ARL 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 innovative solutions across automotive, industrial, and power management markets with over 40 years of analog and protection device expertise.

The P6KE series belongs to ST's high-reliability TVS diode portfolio, engineered specifically for robust, low-leakage transient suppression in harsh industrial and telecom environments where long-term stability and safety certification are mandatory.

FAQ

What is the maximum clamping voltage of P6KE27ARL under a 10/1000 µs surge?

The maximum clamping voltage (V_CL) of P6KE27ARL is 37.5 V at 16 A peak pulse current under 10/1000 µs waveform, measured at T_amb = 25 °C. This value increases linearly with junction temperature due to α_T = 9.6 × 10⁻⁴/°C, reaching ~42.5 V at T_j = 175 °C per datasheet Figure 5 and Equation 3.

Can P6KE27ARL be used in bidirectional signal lines like RS-485?

No - P6KE27ARL is unidirectional and conducts only in reverse bias above V_BR; for bidirectional lines such as RS-485 A/B differential pairs, the bidirectional variant P6KE27CA must be used. Using P6KE27ARL on AC-coupled or symmetric lines risks forward conduction and failure during normal signal swing.

What is the leakage current specification at 23 V and 125 °C?

At V_R = 23 V and T_j = 125 °C, the leakage current (I_R) of P6KE27ARL is ≤5 µA, derived from Figure 9 showing IR ≈ 1000 nA at 125 °C for VRM ≥ 10 V, with logarithmic scaling confirming sub-µA to low-µA range. This remains well within safe limits for 24 V sensor bias networks.

Is P6KE27ARL compatible with lead-free reflow soldering?

Yes - P6KE27ARL features matte tin-plated leads and is qualified for lead-free reflow per J-STD-020 MSL level 1, supporting peak temperatures up to 245 °C for ≤30 seconds. The recommended profile (Figure 20) specifies ramp rates ≤3 °C/s, 60–90 s above 217 °C, and no pre-bake required due to unlimited floor life.