onsemi P6KE27AG

Overview

P6KE27AG from ON Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in axial-leaded Surmetic-40 package, designed for parallel clamping of high-energy transients. It features 27 V breakdown voltage (V_BR = 25.7–28.4 V @ I_T = 1 A), 37.5 V maximum clamping voltage (V_C) at 16 A peak pulse current (I_PP), and 600 W peak pulse power rating per 1 ms waveform - deployed in power supplies, industrial controls, and medical equipment for robust overvoltage protection.

For engineers reviewing the P6KE27AG datasheet, pinout, applications, or equivalent options, key selection criteria include verified VRWM (23.1 V), low leakage (<5 µA @ VRWM), <1 ns response time, UL 497B recognition for isolated loop circuits, and Pb-free axial package compatibility with standard through-hole reflow and hand-soldering processes.

Technical Context

The P6KE27AG operates as a silicon avalanche diode, triggered when reverse voltage exceeds its specified breakdown range. Its clamping action limits transient-induced voltage excursions to ≤37.5 V under 16 A 1 ms pulses, with thermal resistance R_JL = 20 °C/W enabling reliable power dissipation into leads.

It exhibits a temperature coefficient of 0.096 %/°C for V_BR, ensuring predictable voltage drift across −55 to +150 °C operating range. The device complies with Class 3 ESD immunity (>16 kV HBM) and meets UL 497B requirements for isolated loop circuit protection - confirming suitability for safety-critical signal and power line interfaces.

Key Specifications

Pinout & Package

Surmetic-40 axial-leaded plastic package (Case 017AA), cathode indicated by polarity band. Lead length 3/8″, solderable finish, max lead temperature 260 °C for 10 s at 1/16″ from case.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ24A and 1.5KE27CA, the P6KE27AG offers optimal balance of axial mechanical robustness, precise 23.1 V working voltage, and industry-recognized UL 497B compliance - making it preferred for through-hole industrial power and safety-critical signal interfaces where leaded reliability and regulatory validation are mandatory.

Availability

P6KE27AG is available at Aetrix Electronics and suitable for industrial power supplies, medical equipment input stages, and programmable logic controller I/O modules requiring stable component supply and long-term manufacturability.

Supply support for P6KE27AG 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

ON Semiconductor is a global semiconductor manufacturer specializing in power management, analog, sensing, and connectivity solutions for automotive, industrial, and cloud power applications.

The P6KE27AG belongs to the P6KE6.8A Series - a family of 600 W axial-leaded TVS diodes engineered for cost-effective, high-reliability transient suppression in communication systems, process controls, medical devices, and power supplies.

FAQ

What is the maximum clamping voltage of the P6KE27AG under surge conditions?

The P6KE27AG has a maximum clamping voltage (V_C) of 37.5 V when subjected to a 16 A peak pulse current (I_PP) with a 1 ms waveform. This value is measured per Figure 4 in the official ON Semiconductor datasheet and represents the highest voltage the protected circuit will experience during a standardized transient event. The P6KE27AG maintains this clamping performance across its qualified temperature range and is validated for repeatable operation in industrial environments.

Does the P6KE27AG meet UL safety standards for circuit protection?

Yes, the P6KE27AG is UL Recognized under UL 497B (File #E210057) for isolated loop circuit protection - a requirement for many industrial and telecom applications. This certification covers the entire P6KE6.8A series and confirms successful completion of tests including strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge performance. The P6KE27AG's UL 497B listing is documented in the October 2009 Rev. 10 datasheet and remains valid for current production lots.

What is the working peak reverse voltage (V_RWM) specification for the P6KE27AG?

The P6KE27AG has a working peak reverse voltage (V_RWM) of 23.1 V, meaning it can sustain up to this DC or continuous peak voltage in reverse bias while maintaining leakage current below 5 µA. This parameter is critical for proper selection - V_RWM must be ≥ the normal operating voltage of the protected line. For example, the P6KE27AG is commonly used on 24 V DC systems where 23.1 V provides appropriate margin without premature conduction.

Is the P6KE27AG RoHS-compliant and lead-free?

Yes, the 'G' suffix in P6KE27AG explicitly denotes a Pb-free (RoHS-compliant) Surmetic-40 package. ON Semiconductor confirms this construction in the ordering information section of the datasheet, specifying that P6KE27AG is supplied in axial-leaded, void-free thermosetting plastic with corrosion-resistant, readily solderable leads. The device meets JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for through-hole reflow and conforms to IPC/JEDEC standards for lead-free assembly processes.

How does the P6KE27AG compare to bidirectional TVS diodes like the P6KE27CAG?

The P6KE27AG is unidirectional, optimized for DC line protection with asymmetrical clamping (conducts only in reverse), whereas the P6KE27CAG is bidirectional and protects both polarities - suitable for AC lines or data buses. The P6KE27AG offers tighter V_RWM tolerance (23.1 V vs. 23.1 V symmetric), lower capacitance, and UL 497B recognition specific to unidirectional isolated loop use cases. Designers select the P6KE27AG when protecting grounded DC rails where polarity is fixed and regulatory compliance for isolated circuits is required.