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STMicroelectronics P6KE18ARL
- Part No.:
- P6KE18ARL
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
P6KE18ARL.pdf
- Description:
- TVS DIODE 15.3VWM 32.5VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:2,545
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Product details
Overview
P6KE18ARL from STMicroelectronics is a unidirectional 600 W transient voltage suppression diode in DO-15 package, designed for primary-level ESD and surge protection in DC power rails and signal lines. It features a 18 V nominal breakdown voltage (VBR = 17.1–18.9 V), 25.2 V clamping voltage (VCL) at 24 A peak pulse current (IPP), and operates up to 175 °C junction temperature-ideal for industrial power supplies and automotive body electronics.
For engineers reviewing the P6KE18ARL datasheet, P6KE18ARL pinout, P6KE18ARL application, or P6KE18ARL equivalent, key selection criteria include clamping performance under 10/1000 µs surges, low dynamic resistance (0.263 Ω), leakage current ≤0.5 µA at 15 V, and compatibility with lead-free reflow per J-STD-020 MSL level 1.
Technical Context
The P6KE18ARL uses planar junction technology to achieve low leakage (<0.5 µA at VRM = 15 V) and stable VBR temperature coefficient (αT = 8.8 × 10−4/°C), enabling reliable operation across −55 °C to +175 °C. Its unidirectional configuration provides asymmetric conduction: low forward voltage drop (~1.5 V at 10 A) and high reverse standoff (15 V).
Clamping behavior is defined by VCL = VBR(max) + RD × IPP, where RD = 0.263 Ω ensures predictable voltage limiting during 8/20 µs transients up to 32.5 A. Thermal impedance is optimized for FR4 PCBs with standard DO-15 footprint, supporting sustained 300 W dissipation at Tj = 175 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 17.1 / 18.0 / 18.9 V - defines precise reverse conduction onset for accurate overvoltage thresholding |
| VCL @ IPP = 24 A | 25.2 V - maximum voltage seen by protected circuit during 10/1000 µs surge |
| RD (dynamic resistance) | 0.263 Ω - determines clamping voltage rise per amp of surge current |
| IR @ VRM = 15 V | ≤0.5 µA - ensures minimal standby power loss and signal integrity in high-impedance nodes |
| PPP (10/1000 µs) | 600 W - peak surge energy handling capability at Tamb = 25 °C |
| Tj(max) | +175 °C - enables deployment in under-hood automotive or enclosed industrial enclosures |
| ESD immunity | ±30 kV contact/air discharge per IEC 61000-4-2 - exceeds Level 4 for robust system-level ESD hardening |
Pinout & Package
DO-15 (JEDEC DO-204AC) axial-leaded package with cathode band marking; leads are matte tin-plated for solderability and RoHS compliance. Body diameter: 3.24 mm typ., length: 28.5 mm typ., lead diameter: 0.80 mm typ.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry terminal in forward bias | Connects to lower-potential side of protected line; conducts during positive transients when cathode is at higher potential |
| Cathode (banded end) | Current exit terminal in forward bias; clamping node in reverse bias | Connected to protected line; initiates avalanche conduction when line voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-4 Level 4 surge immunity without derating at ambient temperatures ≤25 °C |
| Low dynamic resistance (0.263 Ω) | Minimizes clamping voltage overshoot during fast-rising transients, improving protection margin for downstream ICs |
| 175 °C operating junction temperature | Enables use in thermally constrained environments such as sealed power converters or engine control units |
| UL 497B certified (QVGQ2.E136224) | Validates suitability for telecom/data line surge protection per industry safety standards |
| J-STD-020 MSL level 1 rating | Permits unlimited floor life and standard reflow without baking, simplifying SMT assembly logistics |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) CAN Bus Lines |
|---|---|
Use Scenario: 24 V DC input rail of programmable logic controller (PLC) power supply exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Primary clamping device placed before input filter capacitor and upstream of DC-DC converter. Use Value: Limits transient voltage to ≤25.2 V during 24 A surges, preventing damage to 36 V-rated input-stage MOSFETs and electrolytic capacitors. |
Use Scenario: Protection of CAN_H/CAN_L differential pair in BCM against ESD events during connector mating/unmating. IC Role / Device Role / Timing Role: Unidirectional TVS on each line referenced to ground, sized to avoid signal distortion at 1 Mbps data rate. Use Value: Clamps ±30 kV ESD pulses within 1 ns while maintaining <1 pF junction capacitance at 0 V bias, preserving signal edge integrity. |
| Telecom AC-DC Adapter Secondary Side | Smart Meter Voltage Monitoring Circuit |
Use Scenario: Output rectifier stage of isolated 12 V adapter subjected to lightning-induced surges coupled via transformer parasitics. IC Role / Device Role / Timing Role: Secondary-side TVS across output capacitor to suppress common-mode transients propagating through Y-capacitors. Use Value: Absorbs 600 W surges without thermal runaway, validated per UL 497B for telecom safety compliance. |
Use Scenario: High-impedance voltage divider feeding ADC input in revenue-grade smart meter, vulnerable to induced surges on metering terminals. IC Role / Device Role / Timing Role: Low-leakage (≤0.5 µA) TVS placed directly at ADC input pin to prevent latch-up during meter installation. Use Value: Maintains measurement accuracy by avoiding DC offset shift from leakage current while clamping transients to safe levels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | Same VBR range (17.1–18.9 V), but SMB package (surface-mount); 600 W rating at 25 °C, derates faster above 85 °C | Requires PCB real estate for SMD layout; better suited for automated assembly than axial DO-15 | Select when board space is constrained and reflow compatibility is prioritized over through-hole serviceability |
| P6KE18A | Identical electrical specs and DO-15 package, but supplied in ammopack (1000 pcs) instead of reel (6000 pcs) | No functional difference; only packaging and logistics variation | Select for prototyping or low-volume production where reel handling infrastructure is unavailable |
Compared with SMBJ18A, P6KE18ARL offers superior thermal mass and manual assembly flexibility due to axial leads, while P6KE18A provides identical protection in a different packaging format-making P6KE18ARL optimal for high-volume, cost-sensitive industrial power designs requiring reel-fed insertion.
Availability
P6KE18ARL is available at Aetrix Electronics and suitable for industrial power supply input protection, automotive body control module (BCM) CAN bus lines, and telecom AC-DC adapter secondary-side surge suppression requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for P6KE18ARL 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 emphasis on reliability and environmental compliance.
The P6KE series belongs to ST's high-power TVS diode product line, engineered specifically for robust, cost-effective transient protection in harsh-environment power electronics where long-term stability and standardized JEDEC packaging are critical.
FAQ
What is the maximum clamping voltage of P6KE18ARL under a 10/1000 µs surge?
The maximum clamping voltage (VCL) is 25.2 V at 24 A peak pulse current (IPP) for a 10/1000 µs waveform. This value is measured at Tamb = 25 °C and represents the upper limit of voltage imposed on the protected circuit during standardized surge testing.
Is P6KE18ARL suitable for bidirectional signal line protection?
No-P6KE18ARL is unidirectional and must be used with cathode tied to the protected line and anode grounded. For bidirectional protection (e.g., RS-485, USB D+/D−), the P6KE18CA variant is required, which has symmetrical breakdown in both polarities.
Does P6KE18ARL meet automotive AEC-Q200 stress test requirements?
No-P6KE18ARL is not AEC-Q200 qualified. While it operates up to 175 °C junction temperature and passes IEC 61000-4-2/4-4, it lacks the qualification testing (temperature cycling, vibration, humidity bias) mandated for automotive-grade components.
What is the recommended PCB pad layout for optimal thermal performance?
ST recommends using minimum 1 cm² copper area under each lead on FR4 PCBs to achieve Rth(j-a) ≈ 2.5 °C/W. Larger copper pours further reduce thermal resistance, enabling sustained 300 W operation at Tj = 175 °C per Figure 12 in DS0681 Rev 9.
P6KE18ARL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- P6KE, TRANSIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 32.5V
- Current - Peak Pulse (10/1000µs):
- 123A (8/20µs)
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 1600pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
P6KE18ARL FAQ
1.How can I place an order for P6KE18ARL through Aetrix?
Please submit a Request for Quotation (RFQ) for P6KE18ARL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for P6KE18ARL reliable?
The price and inventory of P6KE18ARL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6KE18ARL is usually 5 days.
3.What payment methods are accepted for P6KE18ARL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6KE18ARL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6KE18ARL?
P6KE18ARL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6KE18ARL order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for P6KE18ARL?
For technical support, including P6KE18ARL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6KE18ARL requirements.
6.How does Aetrix verify that P6KE18ARL is sourced from the original manufacturer or authorized distributors?
All P6KE18ARL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that P6KE18ARL meets industry standards.
7.What is the process for return or replacement of P6KE18ARL?
All P6KE18ARL units undergo pre-shipment inspection (PSI). If there is an issue with P6KE18ARL, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The P6KE18ARL part is unused and in its original packaging.
Return procedure for P6KE18ARL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6KE18ARL Tags
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