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onsemi P6KE51ARLG
- Part No.:
- P6KE51ARLG
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- T-18, Axial
- Datasheet:
-
P6KE51ARLG.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:16,207
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Product details
Overview
P6KE51ARLG from ON Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in axial-leaded Surmetic−40 package, designed for parallel clamping of voltage-sensitive circuits against high-energy transients. It features a 43.6 V working peak reverse voltage (VRWM), 70.1 V maximum clamping voltage (VC) at 8.6 A peak pulse current (IPP), and 600 W peak power dissipation at 1 ms. It is used in industrial power supplies, medical equipment surge protection, and communication line interfaces.
For engineers reviewing the P6KE51ARLG datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM margin over operating DC voltage, VC vs. protected IC's absolute maximum rating, thermal derating above 75°C lead temperature, and UL 497B recognition for isolated loop circuit compliance.
Technical Context
The P6KE51ARLG operates as a silicon avalanche diode with fast turn-on response (<1 ns typical) and low dynamic impedance during transient events. Its breakdown voltage (VBR) is specified at 48.5–53.6 V (min–max) with 1 mA test current, and its temperature coefficient of VBR is +0.102 %/°C - enabling predictable voltage drift across −55°C to +175°C junction range.
It is rated for 100 A non-repetitive forward surge current (IFSM) under 8.3 ms half-sine waveform, and exhibits <5 µA reverse leakage at VRWM. The device uses a void-free thermosetting plastic case (Case 017AA) with cathode polarity band, Pb−Free plating, and solderable leads rated for 230°C for 10 seconds at 1/16″ from case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 43.6 V - maximum continuous reverse voltage before significant leakage; must exceed system DC operating voltage |
| VBR (min/max) | 48.5 V / 53.6 V @ 1 mA - defines avalanche onset window; determines minimum clamping threshold |
| VC @ IPP | 70.1 V @ 8.6 A - clamped voltage seen by protected circuit during 1 ms transient; must stay below downstream IC's absolute max rating |
| PPK | 600 W @ 1 ms - peak transient energy handling capacity; derates to 5.0 W steady-state at TL ≤ 75°C |
| RJL | 20 °C/W - junction-to-lead thermal resistance; critical for PCB layout and heatsinking when used in repetitive surge environments |
| IR @ VRWM | <5 µA - ensures minimal standby power loss and signal integrity in high-impedance monitoring paths |
| Response Time | <1 ns typical - enables suppression before sensitive logic or analog circuitry experiences overvoltage stress |
Pinout & Package
Surmetic−40 axial-leaded package (Case 017AA), 8.38–8.89 mm body length, 3.30–3.68 mm diameter, with cathode indicated by color band. Leads are tin-plated, Pb−Free, and solderable per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or lowest potential node; forms current path during reverse-biased avalanche conduction |
| Cathode | High-side connection point | Marked with band; connected to protected line (e.g., DC input, data line); carries full transient current into ground |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition | Qualified for isolated loop circuit protection - meets safety requirements for telecom and industrial isolation barriers |
| ESD Robustness | Class 3 (>16 kV HBM) - withstands electrostatic discharge events without degradation in field-deployed systems |
| Thermal Derating Profile | 5.0 W @ TL ≤ 75°C, linearly derated to zero at 125°C - enables reliable operation in enclosed power supply enclosures |
| Low Capacitance | ~100 pF @ VRWM - minimizes signal distortion on high-speed lines (e.g., RS-485, CAN) when placed in parallel |
| Pb−Free Construction | RoHS-compliant materials and plating - supports global environmental compliance without performance trade-offs |
Applications
| Industrial Power Supply Input Protection | Medical Equipment ESD Interface Guarding |
|---|---|
Use Scenario: Installed across AC/DC converter input rails to absorb line surges (e.g., IEC 61000-4-5 Level 3, 2 kV ring wave). IC Role / Device Role / Timing Role: Unidirectional clamping diode absorbing positive-going transients on DC bus relative to chassis ground. Use Value: Limits voltage excursion to ≤70.1 V during 8.6 A surge, preventing damage to upstream rectifiers and downstream regulators. |
Use Scenario: Placed on patient-monitor sensor interface lines (e.g., ECG leads) to meet IEC 60601-1-2 ESD immunity requirements. IC Role / Device Role / Timing Role: Fast-response TVS shunting human-body-model (HBM) discharges before reaching analog front-end amplifiers. Use Value: Clamps 16 kV HBM events within <1 ns while maintaining sub-5 µA leakage to preserve microvolt-level signal fidelity. |
| Telecom Line Card Surge Suppression | Automotive Body Control Module (BCM) Power Rail Protection |
Use Scenario: Mounted on DSL or T1 line cards to protect PHY transceivers from lightning-induced surges on twisted-pair copper lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp referenced to isolated secondary ground in transformer-coupled interfaces. Use Value: UL 497B recognition validates suitability for telecom isolation barrier protection; 600 W rating handles multi-kA induced surges. |
Use Scenario: Applied across 12 V battery rail inputs in BCM modules to survive load-dump transients (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Standby protector conducting only during >43.6 V excursions; remains inactive during normal cold-crank (6–8 V) and cranking (up to 40 V). Use Value: Withstands 100 A surge (IFSM) and clamps to 70.1 V, protecting MCU, CAN transceivers, and driver ICs from destructive overvoltage. |
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 (vs. axial P6KE); same VRWM (43.6 V), slightly lower VC (69.4 V @ 8.8 A) | Requires PCB rework for SMT assembly; better high-frequency response due to lower parasitic inductance | Preferred for space-constrained, automated production; not drop-in for through-hole designs |
| 1.5KE51A | Same axial package but higher 1500 W peak power rating; VRWM = 43.6 V, VC = 70.1 V @ 21.3 A | Over-spec'd for 600 W use cases; larger thermal mass and higher cost; may require revised thermal layout | Selected when legacy 1.5KE footprint compatibility is required or when future surge margin expansion is anticipated |
Compared with SMBJ51A and 1.5KE51A, the P6KE51ARLG offers optimal balance of axial-leaded manufacturability, UL 497B certification, and precise 600 W surge capability - making it ideal for cost-sensitive, safety-certified industrial and medical power entry designs where leaded assembly remains standard.
Availability
P6KE51ARLG is available at Aetrix Electronics and suitable for industrial power supplies, medical diagnostic equipment, and telecom line card designs requiring stable component supply with full RoHS and UL compliance traceability.
Supply support for P6KE51ARLG 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 power management, analog, sensors, and discrete devices for automotive, industrial, and cloud power applications.
The P6KE51ARLG belongs to the P6KE6.8A Series of 600 W axial-leaded TVS diodes, engineered for robust, cost-effective overvoltage protection in high-reliability power and interface circuits where UL recognition and thermal stability are mandatory.
FAQ
What is the maximum clamping voltage of the P6KE51ARLG under standard test conditions?
The P6KE51ARLG has a maximum clamping voltage (VC) of 70.1 V when subjected to its rated peak pulse current (IPP) of 8.6 A with a 1 ms exponential waveform. This value is measured per Figure 4 in the official datasheet and represents the highest voltage the protected circuit will experience during a defined transient event. Designers must ensure this clamping level stays below the absolute maximum ratings of downstream components.
Is the P6KE51ARLG certified for safety standards applicable to isolated circuits?
Yes, the P6KE51ARLG carries UL 497B recognition (File #E210057, QVGV2 category) for isolated loop circuit protection. This certification covers testing for strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge performance - confirming its suitability for telecom, medical, and industrial isolation barriers where regulatory compliance is mandatory.
How does the P6KE51ARLG differ from the P6KE51A variant?
The P6KE51ARLG is the Pb−Free, tape-and-reel packaged version of the P6KE51A. Both share identical electrical specifications, thermal ratings, and mechanical dimensions. The "RLG" suffix denotes RoHS-compliant plating and packaging in 4000-unit reels - optimized for automated SMT placement despite being an axial-leaded device, whereas P6KE51A is supplied in 1000-unit boxes with standard SnPb leads.
Can the P6KE51ARLG be used in bidirectional protection applications?
No, the P6KE51ARLG is strictly unidirectional. Its cathode-anode polarity is fixed, and it conducts only during reverse-bias avalanche. For bidirectional transient suppression (e.g., AC lines or differential data buses), ON Semiconductor specifies separate parts with "CA" suffixes such as P6KE51CA - which feature symmetrical breakdown in both directions and different VBR/VC characteristics.
What is the thermal resistance and steady-state power limit of the P6KE51ARLG?
The P6KE51ARLG has a junction-to-lead thermal resistance (RJL) of 20 °C/W and a steady-state power dissipation (PD) limit of 5.0 W at lead temperature (TL) ≤ 75°C. Above 75°C, PD derates linearly to zero at 125°C. This thermal profile requires adequate PCB copper area or heatsinking when deployed in environments with sustained ambient temperatures or repetitive surge events.
P6KE51ARLG 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 (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
P6KE51ARLG FAQ
1.How can I place an order for P6KE51ARLG through Aetrix?
Please submit a Request for Quotation (RFQ) for P6KE51ARLG 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 P6KE51ARLG reliable?
The price and inventory of P6KE51ARLG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6KE51ARLG is usually 5 days.
3.What payment methods are accepted for P6KE51ARLG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6KE51ARLG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6KE51ARLG?
P6KE51ARLG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6KE51ARLG 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 P6KE51ARLG?
For technical support, including P6KE51ARLG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6KE51ARLG requirements.
6.How does Aetrix verify that P6KE51ARLG is sourced from the original manufacturer or authorized distributors?
All P6KE51ARLG 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 P6KE51ARLG meets industry standards.
7.What is the process for return or replacement of P6KE51ARLG?
All P6KE51ARLG units undergo pre-shipment inspection (PSI). If there is an issue with P6KE51ARLG, 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 P6KE51ARLG part is unused and in its original packaging.
Return procedure for P6KE51ARLG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6KE51ARLG Tags
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