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onsemi P6KE51AG
- Part No.:
- P6KE51AG
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- T-18, Axial
- Datasheet:
-
P6KE51AG.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:23,710
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Product details
Overview
P6KE51AG from ON Semiconductor is a unidirectional 600 W transient voltage suppressor (TVS) diode in axial-leaded Surmetic-40 package, designed to protect sensitive electronics against ESD and surge events. It features a 43.6 V working peak reverse voltage (VRWM), 70.1 V clamping voltage (VC) at 8.6 A peak pulse current (IPP), and <1 ns response time - deployed in power supplies, industrial controls, and medical equipment.
For engineers reviewing the P6KE51AG datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM margin over operating voltage, VC vs. device withstand rating, thermal derating above 25°C, and UL 497B certification for isolated loop protection.
Technical Context
The P6KE51AG operates as a silicon avalanche diode with unidirectional polarity, triggered when reverse voltage exceeds its breakdown threshold (VBR = 48.5–53.6 V @ IT = 1 mA). Its clamping action limits transient energy by diverting surge current away from downstream circuitry while maintaining low leakage (<5 µA @ VRWM).
Thermal design relies on junction-to-lead resistance (RJL = 20 °C/W) and steady-state power dissipation (5.0 W @ TL ≤ 25°C), with linear derating above 50°C. It complies with UL 497B for isolated loop circuit protection and meets Class 3 HBM ESD rating (>16 kV).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Power | 600 W @ 1 ms non-repetitive pulse - defines maximum single-event surge energy handling |
| Working Peak Reverse Voltage | 43.6 V - must be ≥ continuous DC/peak AC operating voltage of protected circuit |
| Clamping Voltage | 70.1 V @ 8.6 A IPP - maximum voltage seen by protected load during worst-case surge |
| Breakdown Voltage | 48.5–53.6 V @ 1 mA - ensures reliable turn-on before system damage threshold |
| Leakage Current | <5 µA @ 43.6 V - negligible standby power loss and no signal integrity impact |
| Response Time | <1 ns - enables suppression before fast transients (e.g., ESD, lightning-induced spikes) propagate |
| ESD Rating | Class 3 (>16 kV) per HBM - qualifies for high-reliability end-equipment with human interface |
Pinout & Package
Package: Surmetic-40 axial-leaded plastic case (Case 017AA), Pb-free, cathode indicated by band. Mounting position unrestricted; max solder temperature 260°C at 1/16″ from case for 10 s.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-impedance return path; completes conduction path during clamping |
| Cathode | High-side connection point | Connected to protected line (e.g., VIN, signal rail); polarity band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition | Validated for isolated loop circuit protection - supports compliance-critical telecom and industrial designs |
| Low Clamping Ratio | VC / VBR ≈ 1.45 - tight voltage control minimizes overvoltage stress on downstream ICs |
| Thermal Robustness | RJL = 20 °C/W + 5.0 W steady-state rating - enables reliable operation without heatsinking in moderate-power systems |
| Pb-Free Construction | RoHS-compliant Surmetic-40 package - meets global environmental regulations without performance trade-off |
| Fast Transient Response | <1 ns turn-on - critical for suppressing sub-nanosecond ESD events per IEC 61000-4-2 |
Applications
| Industrial Power Supply Protection | Medical Equipment Surge Suppression |
|---|---|
Use Scenario: Input stage of AC/DC front-end where line surges (IEC 61000-4-5) threaten rectifier and controller ICs. IC Role / Device Role: Primary overvoltage clamp placed across bulk capacitor or bridge rectifier output. Use Value: Limits transient voltage to 70.1 V, preventing latch-up or gate oxide rupture in 65 V-rated MOSFETs and controllers. | Use Scenario: Patient-connected signal lines (e.g., ECG leads) exposed to electrostatic discharge during handling. IC Role / Device Role: First-line protection element between connector and analog front-end amplifier. Use Value: Withstands >16 kV HBM ESD while adding <1 pF capacitance - preserves signal fidelity and common-mode rejection. |
| Programmable Logic Controller I/O Protection | Telecom Line Interface Protection |
Use Scenario: 24 V DC digital input module subject to inductive kickback from solenoid loads and field wiring faults. IC Role / Device Role: Unidirectional TVS shunting transients from input optocoupler anode to ground. Use Value: Clamps 8.6 A surges within 1 ns, ensuring optocoupler CMTI remains intact and PLC firmware avoids spurious interrupts. | Use Scenario: Isolated RS-485 bus termination on equipment connected to long outdoor runs vulnerable to lightning-induced surges. IC Role / Device Role: Secondary protection after gas discharge tube (GDT), clamping residual overshoot across differential pair. Use Value: UL 497B recognition validates use in safety-isolated telecom circuits; 70.1 V VC protects 3.3 V/5 V transceivers without external series impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51A | Surface-mount SMB package; same VRWM (43.6 V), slightly lower VC (71.4 V @ 8.3 A) | Requires PCB rework for SMT layout; better high-frequency response due to lower parasitic inductance | Select SMBJ51A when board space is constrained and automated assembly is preferred. |
| 1.5KE51A | Higher peak power (1500 W), larger DO-201 package; identical electrical specs (VRWM, VBR, VC) | Used where higher single-pulse energy (e.g., AC mains surges) demands greater robustness | Choose 1.5KE51A for legacy designs requiring proven field reliability under extreme 10/1000 µs surges. |
Compared with SMBJ51A and 1.5KE51A, the P6KE51AG offers optimal balance of axial-leaded serviceability, UL 497B certification, and 600 W surge capacity - making it ideal for mid-tier industrial power and signal protection where through-hole assembly and regulatory validation are prioritized.
Availability
P6KE51AG is available at Aetrix Electronics and suitable for industrial power supplies, medical instrumentation, programmable logic controllers, and telecom line interfaces requiring stable component supply and long-term lifecycle support.
Supply support for P6KE51AG 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 manufacturer specializing in power management, analog, sensor, and discrete devices for automotive, industrial, and cloud power applications.
The P6KE51AG belongs to the P6KE6.8A Series - a family of 600 W axial-leaded TVS diodes engineered for cost-effective, high-reliability transient suppression in harsh environments with certified safety compliance.
FAQ
What is the clamping voltage of the P6KE51AG and how is it measured?
The P6KE51AG has a maximum clamping voltage (VC) of 70.1 V, measured at a peak pulse current (IPP) of 8.6 A using the 10/1000 µs standard surge waveform per Figure 4 in the datasheet. This value represents the highest voltage the device allows across its terminals during a defined transient event - critical for verifying compatibility with downstream component voltage ratings. The P6KE51AG maintains this clamping performance across its qualified temperature range.
Does the P6KE51AG meet UL safety standards?
Yes, the P6KE51AG is UL Recognized under UL 497B (File #E210057, QVGQ2 category) for isolated loop circuit protection. This certification covers dielectric withstand, endurance conditioning, and strike voltage breakdown testing - confirming suitability for safety-critical telecom and industrial isolation barriers. The P6KE51AG shares this qualification with the full P6KE6.8A–P6KE200A series.
What is the meaning of the "G" suffix in P6KE51AG?
The "G" suffix in P6KE51AG indicates a Pb-free (RoHS-compliant) version of the device, packaged in the same Surmetic-40 axial-leaded form factor. It retains identical electrical specifications and thermal performance as the non-Pb-free P6KE51A variant. The P6KE51AG is manufactured using lead-free solderable terminations and complies with global environmental directives without functional compromise.
How does the P6KE51AG handle repeated surge events?
The P6KE51AG is rated for non-repetitive pulses per Figure 1; for repetitive surges, average power must be derated using Figures 2 and 6. At 25°C ambient, its steady-state power dissipation is 5.0 W, decreasing linearly above 50°C. Duty cycle and pulse width directly impact allowable repetition rate - e.g., 10 ms pulses at 1% duty cycle require ~30% peak power reduction. System-level thermal design must account for this when deploying the P6KE51AG in cyclic surge environments.
Can the P6KE51AG be used in bidirectional protection circuits?
No, the P6KE51AG is a unidirectional TVS diode and must be used with correct polarity - cathode connected to the protected line, anode to ground. For bidirectional protection (e.g., AC lines or data lines with voltage swings above and below ground), a separate bidirectional device such as P6KE51CA or equivalent is required. Using the P6KE51AG in reverse-biased configuration risks permanent failure, as it is not rated for forward conduction beyond brief surge conditions.
P6KE51AG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- T-18, Axial
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 8.6A
- 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
P6KE51AG FAQ
1.How can I place an order for P6KE51AG through Aetrix?
Please submit a Request for Quotation (RFQ) for P6KE51AG 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 P6KE51AG reliable?
The price and inventory of P6KE51AG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6KE51AG is usually 5 days.
3.What payment methods are accepted for P6KE51AG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6KE51AG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6KE51AG?
P6KE51AG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6KE51AG 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 P6KE51AG?
For technical support, including P6KE51AG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6KE51AG requirements.
6.How does Aetrix verify that P6KE51AG is sourced from the original manufacturer or authorized distributors?
All P6KE51AG 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 P6KE51AG meets industry standards.
7.What is the process for return or replacement of P6KE51AG?
All P6KE51AG units undergo pre-shipment inspection (PSI). If there is an issue with P6KE51AG, 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 P6KE51AG part is unused and in its original packaging.
Return procedure for P6KE51AG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6KE51AG Tags
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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