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onsemi P6KE18ARL
- Part No.:
- P6KE18ARL
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- T-18, Axial
- Datasheet:
-
P6KE18ARL.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:4,513
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Product details
Overview
P6KE18ARL 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 15.3 V working peak reverse voltage (VRWM), 18 V nominal breakdown voltage (VBR), 25.2 V clamping voltage (VC) at 24 A peak pulse current (IPP), and 600 W peak pulse power rating at 1 ms. It is used to protect DC power rails and signal lines in industrial power supplies and communication interfaces.
For engineers reviewing the P6KE18ARL datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM ≥ circuit operating voltage, VC margin relative to IC absolute maximum ratings, IPP capability under system surge profiles, and UL 497B recognition for isolated loop protection compliance.
Technical Context
The P6KE18ARL operates as a silicon avalanche diode with fast <1 ns response time, enabling effective suppression of ESD and lightning-induced surges before downstream components experience overstress. Its unidirectional configuration provides low leakage (<5 µA at VRWM) and precise clamping without bidirectional conduction path.
It is rated for 600 W nonrepetitive peak pulse power per 1 ms waveform (Figure 4), with thermal resistance of 20 °C/W (junction-to-lead), and supports steady-state dissipation up to 5.0 W at TL ≤ 25°C - derated linearly above 50°C. The device meets Class 3 ESD immunity (>16 kV HBM) and UL 497B certification for isolated loop circuit protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 15.3 V - Maximum continuous reverse voltage the device blocks without significant leakage; must be ≥ circuit's DC operating voltage. |
| VBR @ IT=1 A | 17.1–18.9 V - Breakdown occurs within this range at 1 A test current; defines onset of avalanche conduction. |
| VC @ IPP=24 A | 25.2 V - Clamped voltage seen by protected circuit during 24 A transient; determines maximum stress on downstream ICs. |
| IPP | 24 A - Peak pulse current the device safely clamps at 1 ms duration; correlates to IEC 61000-4-5 Level 4 surge capability. |
| Peak Power | 600 W @ 1 ms - Energy-handling capacity for single-event transients; derates per Figure 1/2 with pulse width and temperature. |
| Leakage @ VRWM | <5 µA - Ensures minimal loading on low-power circuits during normal operation. |
| Response Time | <1 ns - Enables clamping before most ICs experience latch-up or gate oxide damage from fast-rising transients. |
Pinout & Package
Surmetic-40 axial-leaded plastic package (Case 017AA), cathode indicated by polarity band. Leads are solderable, corrosion-resistant, with max soldering temperature of 260°C at 1/16″ from case for 10 seconds. Mounting position unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to circuit ground or return path; completes clamping path during reverse transient. |
| Cathode | High-side connection point | Connected to protected line (e.g., +12 V rail); polarity band identifies this terminal for correct orientation. |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition | Validated for isolated loop circuit protection - enables use in telecom/data line interfaces requiring safety agency approval. |
| ESD Rating (HBM) | Class 3 (>16 kV) - exceeds IEC 61000-4-2 Level 4 for system-level ESD robustness without additional front-end filtering. |
| Clamp Voltage Margin | VC = 25.2 V at IPP = 24 A - provides ≥2.8 V margin below typical 28 V absolute max rating of industrial-grade DC-DC controllers. |
| Thermal Robustness | RJL = 20 °C/W - enables reliable operation at lead temperatures up to 150°C when mounted with 3/8″ lead length per Figure 5. |
Applications
| Industrial Power Supply Protection | RS-485 Interface Protection |
|---|---|
Use Scenario: Protecting 24 V DC input rails in programmable logic controllers (PLCs) against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND to clamp positive-going surges before they reach upstream regulators and microcontrollers. Use Value: Limits transient voltage to 25.2 V, preventing overvoltage failure of 30 V-rated input capacitors and 36 V max-rated buck controllers. | Use Scenario: Safeguarding RS-485 transceivers in factory automation networks exposed to ground potential differences and cable discharge events. IC Role / Device Role / Timing Role: Paired TVS devices (one per line) referenced to local ground, clamping differential and common-mode surges on A/B bus lines. Use Value: With <1 ns response and 25.2 V clamping, prevents transceiver latch-up and bus contention caused by >1 kV EFT bursts per IEC 61000-4-4. |
| Medical Equipment Power Input | Point-of-Sale Terminal Power Rails |
Use Scenario: Securing auxiliary 12 V/24 V power inputs in diagnostic imaging subsystems where reliability and regulatory compliance are critical. IC Role / Device Role / Timing Role: Primary overvoltage protector on secondary-side DC distribution, certified to UL 497B for patient-connected equipment isolation boundaries. Use Value: UL recognition eliminates need for separate isolation barrier testing; 600 W surge rating handles defibrillator-induced coupling transients. | Use Scenario: Hardening 5 V and 12 V internal rails in retail POS terminals subject to AC line surges and hot-plug USB/Ethernet events. IC Role / Device Role / Timing Role: Low-leakage (≤5 µA) TVS on regulated outputs to avoid battery drain while maintaining fast clamping for conducted ESD. Use Value: Enables direct placement on rail without compromising standby current budget; 25.2 V VC ensures safe operation with 5 V logic and 12 V solenoid drivers. |
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 | Surface-mount SMB package; same VRWM (15.3 V), slightly higher VC (26.5 V @ 23.5 A); lower IPP (23.5 A). | Requires PCB rework for SMT layout; better suited for space-constrained designs with automated assembly. | Select SMBJ18A only if board real estate is limited and reflow compatibility is confirmed. |
| 1.5KE18A | Higher peak power (1500 W), same VRWM/VC specs, but larger DO-201 package; lead-free option available as 1.5KE18ARL. | Used where higher surge margin is required (e.g., outdoor telecom cabinets), but occupies more board area and has higher inductance. | Choose 1.5KE18A when system-level surge testing requires >600 W headroom and axial lead mechanical robustness is acceptable. |
Compared with SMBJ18A and 1.5KE18A, the P6KE18ARL offers optimal balance of 600 W surge capability, axial-leaded through-hole mounting for manual repairability and high-reliability industrial environments, and UL 497B certification - making it preferred for field-serviceable equipment and safety-critical power entry points.
Availability
P6KE18ARL is available at Aetrix Electronics and suitable for industrial power supply protection, RS-485 interface hardening, and medical equipment power input applications requiring stable component supply and long-term lifecycle support.
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
ON Semiconductor (now part of onsemi) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The P6KE18ARL belongs to the P6KE6.8A Series of 600 W axial-leaded TVS diodes, engineered specifically for cost-sensitive, high-reliability transient suppression in industrial control, communications infrastructure, and medical electronics where UL recognition and proven surge endurance are mandatory.
FAQ
What is the clamping voltage of the P6KE18ARL and how is it measured?
The P6KE18ARL has a maximum clamping voltage (VC) of 25.2 V, measured at a peak pulse current (IPP) of 24 A with a 1 ms exponential waveform per Figure 4 in the datasheet. This value represents the highest voltage the device allows across its terminals during a standardized surge event, directly determining the protection level for downstream components. The P6KE18ARL maintains this VC rating under specified thermal conditions and is validated across production lots per ON Semiconductor's quality protocol.
Does the P6KE18ARL meet UL safety standards?
Yes, the P6KE18ARL is UL Recognized under UL 497B (File #E210057) for isolated loop circuit protection - covering the full P6KE6.8A–P6KE200A series. This certification confirms successful completion of Strike Voltage Breakdown, Endurance Conditioning, Dielectric Withstand, and Discharge tests. The P6KE18ARL carries this recognition inherently as a member of the certified family, with no additional qualification required for end-equipment compliance.
What is the working peak reverse voltage (VRWM) of the P6KE18ARL and why does it matter?
The P6KE18ARL has a VRWM of 15.3 V - the maximum continuous DC or peak AC voltage it blocks without exceeding 5 µA leakage. This parameter is critical for proper selection: VRWM must be ≥ the circuit's normal operating voltage to prevent false triggering, yet low enough to ensure clamping begins before protected ICs exceed their absolute maximum ratings. For a 12 V rail, the P6KE18ARL's 15.3 V VRWM provides appropriate margin while enabling timely avalanche conduction during overvoltage events.
Can the P6KE18ARL be used in bidirectional applications?
No, the P6KE18ARL is a unidirectional TVS diode and conducts only during positive transients on the cathode relative to anode. It does not suppress negative-going surges on the protected line. For bidirectional protection (e.g., AC lines or data buses with voltage swings both above and below ground), a separate bidirectional device such as P6KE18CA or a back-to-back P6KE18ARL pair would be required - but the P6KE18ARL itself is strictly unidirectional per its datasheet designation and marking.
What packaging options are available for the P6KE18ARL?
The P6KE18ARL is supplied in tape-and-reel format: 4,000 units per reel. It uses the Surmetic-40 axial-leaded plastic package (Case 017AA) with cathode polarity band. Unlike the "G" suffix variants (e.g., P6KE18AG), the P6KE18ARL is not explicitly marked as Pb-free in the ordering information, though RoHS-compliant processing applies per ON Semiconductor's standard manufacturing practice. Lead finish is tin-plated copper, compatible with standard SnPb and lead-free soldering profiles.
P6KE18ARL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- T-18, Axial
- Series:
- -
- 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:
- 25.2V
- Current - Peak Pulse (10/1000µs):
- 24A (8/20µs)
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
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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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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