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onsemi P6KE91ARLG
- Part No.:
- P6KE91ARLG
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- T-18, Axial
- Datasheet:
-
P6KE91ARLG.pdf
- Description:
- TVS DIODE 77.8VWM 125VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:4,989
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Product details
Overview
P6KE91ARLG 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 91 V breakdown voltage (VBR), 125 V maximum clamping voltage (VC) at 4.8 A peak pulse current (IPP), and 600 W peak pulse power rating - deployed to protect power supplies, industrial controls, and communication interfaces against ESD and lightning-induced surges.
For engineers reviewing the P6KE91ARLG datasheet, pinout, applications, or equivalent options, key selection criteria include working peak reverse voltage (77.8 V), low leakage (<5 µA @ VRWM), sub-1 ns response time, UL 497B recognition for isolated loop protection, and Pb-free tape-and-reel packaging (4000 units/reel).
Technical Context
The P6KE91ARLG operates as a silicon avalanche diode with unidirectional polarity, triggered when reverse voltage exceeds its 86.5–95.5 V breakdown range. Its clamping action limits transient-induced overvoltage to ≤125 V during 1 ms pulses, sustaining up to 600 W nonrepetitive surge energy without degradation.
Thermal design relies on junction-to-lead resistance of 20 °C/W and steady-state power dissipation of 5.0 W at 25 °C ambient, derating linearly above 50 °C. The device meets Class 3 ESD immunity (>16 kV HBM) and exhibits a temperature coefficient of 0.106 %/°C for VBR, ensuring stable clamping across −55 to +150 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VBR) | 86.5–95.5 V @ 1 mA test current - defines precise conduction onset for reliable overvoltage triggering |
| Working Peak Reverse Voltage (VRWM) | 77.8 V - maximum continuous reverse voltage before leakage exceeds 5 µA |
| Clamping Voltage (VC) | 125 V @ 4.8 A IPP - peak voltage seen by protected circuit during worst-case 1 ms surge |
| Peak Pulse Power (PPK) | 600 W @ 1 ms - energy-handling capacity for lightning or EFT transients per IEC 61000-4-5 |
| Response Time | <1 ns - enables suppression before sensitive ICs experience damaging overvoltage overshoot |
| ESD Rating (HBM) | Class 3 (>16 kV) - qualifies for robust electrostatic discharge protection in handling and operation |
| UL Recognition | UL 497B certified - validated for isolated loop circuit protection in telecom and industrial safety-critical systems |
Pinout & Package
Surmetic-40 axial-leaded plastic package (Case 017AA), cathode indicated by band. Leads are solderable per J-STD-020; max soldering temperature 260 °C at 1/16″ from case for 10 s. Mounting position unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or common return path; completes clamping loop during reverse transient |
| Cathode | High-side transient input | Connected to protected line (e.g., DC input, signal rail); absorbs surge energy into ground via anode |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping architecture | Enables selective protection of positive-polarity DC rails without interfering with normal forward conduction |
| Low leakage current | <5 µA @ 77.8 V ensures minimal standby power loss and no signal distortion in always-on circuits |
| Thermally robust lead-frame design | 20 °C/W junction-to-lead thermal resistance supports sustained surge handling without thermal runaway |
| Pb-free tape-and-reel packaging | RoHS-compliant P6KE91ARLG variant supplied in 4000-unit reels for automated SMT-compatible axial insertion |
| UL 497B certification | Validated for use in safety-critical isolated loop applications including analog I/O and fieldbus interfaces |
Applications
| Industrial Power Supply Protection | Telecom Line Interface |
|---|---|
Use Scenario: 48 V DC input stage of programmable logic controller (PLC) power module exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed across input terminals to clamp surges before they reach upstream regulators and controllers. Use Value: Limits transient voltage to ≤125 V, preventing damage to 60 V-rated MOSFETs and enabling compliance with IEC 61000-4-5 Level 3 (1 kV/2 kV) | Use Scenario: RS-485 data line in outdoor base station equipment subject to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Paired P6KE91ARLG devices (line-to-ground) provide symmetric clamping on differential pair while preserving signal integrity. Use Value: Sub-1 ns response prevents overshoot beyond receiver absolute maximum ratings; UL 497B approval supports telecom safety certification. |
| Medical Equipment Input Stage | Automated Test Equipment (ATE) Signal Conditioning |
Use Scenario: AC/DC adapter input of portable ultrasound unit requiring patient-isolation compliance and surge immunity. IC Role / Device Role / Timing Role: Primary-level TVS on secondary-side DC output, protecting downstream analog front-end and microcontroller. Use Value: 77.8 V VRWM matches 72 V nominal supply; 600 W rating handles EN 61000-4-4 EFT bursts without degradation. | Use Scenario: High-precision DAC output buffer in semiconductor tester exposed to relay bounce and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly at DAC output pin to suppress fast-rising transients without affecting settling time. Use Value: Clamping at 125 V preserves 16-bit linearity margin; <5 µA leakage avoids DC offset errors in µV-level analog paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A | Surface-mount SMB package; 90 V VBR; 600 W rating; 100 V VC @ 6.0 A | Requires PCB rework for SMT layout; lower clamping voltage but higher IPP capability | Select when board space is constrained and automated assembly favors SMT over axial leads |
| 1.5KE91A | Same axial package; identical VBR/VC specs; 1500 W peak power; larger case (DO-201AE) | Higher surge margin for infrequent extreme events; not drop-in due to larger footprint and lead spacing | Select when legacy designs require higher energy absorption and mechanical compatibility with DO-201AE sockets |
Compared with SMBJ90A and 1.5KE91A, the P6KE91ARLG offers optimal balance of axial-lead serviceability, UL 497B certification for isolated loops, and RoHS-compliant tape-and-reel delivery - making it preferred for industrial control and telecom infrastructure where safety compliance and through-hole reliability are prioritized over raw power rating or miniaturization.
Availability
P6KE91ARLG is available at Aetrix Electronics and suitable for industrial power supplies, telecom interface modules, medical equipment inputs, and automated test equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P6KE91ARLG 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 is a global supplier of energy-efficient semiconductor components, specializing in power management, analog, sensor, and discrete devices for automotive, industrial, and cloud infrastructure markets.
The P6KE91ARLG belongs to the P6KE6.8A Series of 600 W axial-leaded TVS diodes, engineered specifically for cost-sensitive, high-reliability transient protection in communication systems, process controls, and medical electronics where UL recognition and thermal stability are mandatory.
FAQ
What is the maximum clamping voltage of the P6KE91ARLG under standard surge conditions?
The P6KE91ARLG has a maximum clamping voltage (VC) of 125 V when subjected to its rated peak pulse current of 4.8 A with a 1 ms waveform. This value is measured per Figure 4 in the ON Semiconductor datasheet and represents the upper limit of voltage imposed on protected circuitry during transient events - critical for ensuring downstream components remain within their absolute maximum voltage ratings. The P6KE91ARLG maintains this clamping performance across its full operating temperature range.
Is the P6KE91ARLG suitable for bidirectional signal line protection?
No, the P6KE91ARLG is a unidirectional TVS diode and must only be used on DC-biased or ground-referenced lines. It conducts only during reverse overvoltage conditions and will not suppress positive transients on AC or floating signals. For bidirectional protection, two P6KE91ARLG devices may be connected in series opposing configuration, but the standard P6KE91ARLG itself does not support symmetrical clamping. Always verify polarity alignment during placement to avoid forward conduction failure.
Does the P6KE91ARLG meet UL 497B requirements for isolated loop protection?
Yes, the P6KE91ARLG is explicitly included in ON Semiconductor's UL 497B recognition (File #E210057, QVGQ2 category) for protector classification. This certification covers dielectric withstand, endurance conditioning, and strike voltage breakdown testing - confirming suitability for isolated loop applications such as analog I/O, fieldbus interfaces, and telecom line cards where galvanic isolation integrity must be maintained during surge events. The P6KE91ARLG's qualification applies across its full voltage range per the datasheet.
What is the thermal resistance specification for the P6KE91ARLG, and how does it affect surge handling?
The P6KE91ARLG has a junction-to-lead thermal resistance (RJL) of 20 °C/W, measured with 3/8″ lead length at 25 °C ambient. This parameter determines how efficiently heat generated during a 600 W transient is conducted away from the silicon junction to the PCB or heatsink. Lower RJL enables faster thermal recovery between pulses and supports higher duty-cycle operation - essential for applications like motor drive feedback lines where repetitive transients occur. Derating curves in Figure 2 of the datasheet define safe operating limits above 50 °C.
Can the P6KE91ARLG replace the P6KE91A in existing designs without modification?
Yes, the P6KE91ARLG is a direct Pb-free, tape-and-reel compatible replacement for the P6KE91A, sharing identical electrical specifications, Surmetic-40 axial package dimensions (Case 017AA), and marking format. The "RLG" suffix denotes RoHS-compliant construction and 4000-unit tape-and-reel packaging - no PCB layout, solder profile, or circuit design changes are required. All parametric values, including VRWM = 77.8 V, VC = 125 V, and IPP = 4.8 A, are fully matched per the ON Semiconductor P6KE6.8A Series datasheet.
P6KE91ARLG 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):
- 77.8V
- Voltage - Breakdown (Min):
- 86.5V
- Voltage - Clamping (Max) @ Ipp:
- 125V
- Current - Peak Pulse (10/1000µs):
- 4.8A (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
P6KE91ARLG FAQ
1.How can I place an order for P6KE91ARLG through Aetrix?
Please submit a Request for Quotation (RFQ) for P6KE91ARLG 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 P6KE91ARLG reliable?
The price and inventory of P6KE91ARLG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6KE91ARLG is usually 5 days.
3.What payment methods are accepted for P6KE91ARLG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6KE91ARLG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6KE91ARLG?
P6KE91ARLG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6KE91ARLG 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 P6KE91ARLG?
For technical support, including P6KE91ARLG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6KE91ARLG requirements.
6.How does Aetrix verify that P6KE91ARLG is sourced from the original manufacturer or authorized distributors?
All P6KE91ARLG 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 P6KE91ARLG meets industry standards.
7.What is the process for return or replacement of P6KE91ARLG?
All P6KE91ARLG units undergo pre-shipment inspection (PSI). If there is an issue with P6KE91ARLG, 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 P6KE91ARLG part is unused and in its original packaging.
Return procedure for P6KE91ARLG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6KE91ARLG Tags
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