STMicroelectronics P6KE39CARL

Overview

P6KE39CARL from STMicroelectronics is a bidirectional 600 W transient voltage suppression diode in DO-15 package, designed for IEC 61000-4-2 ESD (30 kV air/contact) and IEC 61000-4-4 surge (4 kV level 4) protection. It features a 39 V breakdown voltage (V_BR = 37.1–41.0 V), 53.9 V clamping voltage (V_CL) at 11.1 A (10/1000 µs), and operates up to +175 °C junction temperature. It is deployed in AC/DC power input stages of industrial SMPS and telecom interface circuits.

For engineers reviewing the P6KE39CARL datasheet, P6KE39CARL pinout, P6KE39CARL application, or P6KE39CARL equivalent, key selection criteria include bidirectional polarity, 39 V standoff rating, 53.9 V clamping performance at 11.1 A, thermal stability to 175 °C, and DO-15 mechanical compatibility with legacy PCB footprints.

Technical Context

The P6KE39CARL is a planar-junction silicon avalanche diode optimized for fast response (<1 ns) to transient overvoltages. Its bidirectional structure enables symmetrical clamping across both polarities without external circuitry, eliminating need for back-to-back unidirectional devices.

It delivers 600 W peak pulse power (10/1000 µs) at 25 °C, derating to 300 W at T_j = 175 °C per Figure 3. Dynamic resistance (R_D = 1.16 Ω) and low leakage (<0.5 µA at V_RM = 33 V) ensure minimal system loading during normal operation.

Key Specifications

Pinout & Package

DO-15 (JEDEC DO-204AC) axial-leaded package with cathode band marking. Body length: 6.05–6.75 mm; lead diameter: 0.71–0.88 mm; overall length: 26–31 mm. Matte tin-plated leads compliant with J-STD-002 and RoHS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMBJ39CA and 1.5KE39CA, P6KE39CARL provides optimal balance of proven reliability in legacy DO-15 layouts, cost efficiency, and sufficient 600 W surge rating for most industrial AC input and telecom interface applications without over-engineering.

Availability

P6KE39CARL is available at Aetrix Electronics and suitable for industrial AC/DC power inputs, telecom line interfaces, automotive body control modules, and smart meter mains protection requiring stable component supply and long-term obsolescence management.

Supply support for P6KE39CARL 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, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

P6KE39CARL belongs to the P6KE series of planar TVS diodes engineered specifically for high-reliability transient suppression in power conversion and communication infrastructure, emphasizing thermal stability and ESD/surge compliance.

FAQ

What is the polarity configuration of P6KE39CARL?

P6KE39CARL is a bidirectional TVS diode, indicated by the "CA" suffix. It provides symmetrical clamping for both positive and negative transients without requiring external polarity alignment. The device has no designated anode or cathode for surge suppression-both terminals behave identically under reverse bias, enabling use across AC signals or floating differential lines.

How does P6KE39CARL perform at elevated junction temperatures?

At T_j = 175 °C, P6KE39CARL maintains 300 W peak pulse power (10/1000 µs), half its 25 °C rating. V_BR and V_CL increase linearly with temperature coefficient α_T = 0.001 /°C; for example, V_CL rises to ~59.2 V at 175 °C. This behavior is fully characterized in DS0681 Figure 3 and Table 2 notes.

Is P6KE39CARL compatible with lead-free reflow soldering?

Yes-P6KE39CARL meets J-STD-020 MSL Level 1 and is qualified for lead-free reflow with peak temperature up to 245 °C (see Figure 20). Its matte tin-plated leads withstand 10 s at 260 °C per MIL-STD-750 Method 2026, and the DO-15 package passes JESD-201 Class 2 whisker testing.

What is the typical junction capacitance of P6KE39CARL?

At 1 MHz and V_R = 0 V, the bidirectional P6KE39CARL exhibits ~200 pF junction capacitance (inferred from Figure 8 curve for P6KE39CA at 1 V reverse bias). Capacitance decreases sharply with increasing reverse voltage-e.g., ~40 pF at V_R = 10 V-making it suitable for low-speed signal lines but not RF or high-speed data buses.