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onsemi P6KE9.1A
- Part No.:
- P6KE9.1A
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
P6KE9.1A.pdf
- Description:
- TVS DO15 7.7V 600W UNIDIR
- Quantity:
- Payment:
- Shipping:
Inventory:7,242
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Product details
Overview
P6KE9.1A from ON Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for parallel protection of sensitive electronics against ESD, lightning-induced surges, and inductive switching transients. It features a 7.78 V working peak reverse voltage (VRWM), 9.1 V nominal breakdown voltage (VBR), 13.4 V clamping voltage (VC) at 45 A peak pulse current (IPP), and 600 W peak pulse power rating at 1 ms. It is commonly deployed in DC power input lines of industrial power supplies and medical equipment.
For engineers reviewing the P6KE9.1A datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM margin over operating voltage, clamping voltage vs. protected IC's absolute maximum rating, surge current capability under IEC 61000-4-5 waveform, and UL 497B recognition for isolated loop circuit protection.
Technical Context
The P6KE9.1A operates as a silicon avalanche diode with fast turn-on response (<1 ns) and low dynamic impedance during transient events. Its unidirectional polarity requires cathode connection to the protected line and anode to ground, enabling precise clamping above VRWM while maintaining <50 µA leakage at 7.78 V.
Thermal design relies on junction-to-lead thermal resistance (RJL = 20 °C/W) and derated steady-state power (5.0 W at TL ≤ 75 °C). It complies with UL 497B for isolated loop circuit protection and meets Class 3 ESD immunity (>16 kV HBM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 7.78 V - Maximum continuous reverse voltage before significant leakage; must exceed system DC operating voltage. |
| VBR @ IT=1 A | 8.65–9.55 V - Breakdown range at 1 A test current; defines onset of avalanche conduction. |
| VC @ IPP=45 A | 13.4 V - Clamped voltage during 1 ms 45 A surge; determines maximum stress on downstream components. |
| IPP | 45 A - Peak pulse current supported at 1 ms; correlates to IEC 61000-4-5 Level 3 (1 Ω/2 Ω coupling network). |
| Leakage @ VRWM | 50 µA - Reverse leakage at rated VRWM; ensures minimal standby power loss and signal integrity. |
| Response Time | <1 ns - Time from transient onset to clamping activation; critical for protecting high-speed logic and analog inputs. |
| Package | Surmetic−40 axial lead (Case 017AA) - Industry-standard through-hole package with Pb-free option (G suffix) and cathode band marking. |
Pinout & Package
Surmetic−40 axial lead package (Case 017AA) with cathode indicated by a colored band. Leads are tinned, solderable, and rated for 230 °C for 10 seconds at 1/16″ from case. Mounting position is unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system ground plane; completes avalanche conduction path during overvoltage events. |
| Cathode | Protected line terminal | Connected to the line being safeguarded (e.g., +12 V rail); clamps voltage when reverse-biased beyond VRWM. |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition | Qualified for isolated loop circuit protection-enables compliance in telecom and medical isolation barriers without additional certification effort. |
| ESD Robustness | Class 3 HBM (>16 kV)-survives handling and board-level ESD events without parameter shift or failure. |
| Clamp-to-Breakdown Ratio | VC/VBR ≈ 1.47 (13.4 V / 9.1 V)-low ratio minimizes overvoltage overshoot during fast transients. |
| Temperature Coefficient | +0.068 %/°C-predictable VBR drift with temperature enables stable clamping across −55 °C to +175 °C operating range. |
Applications
| Industrial Power Supply Input Protection | Medical Equipment Signal Line Guarding |
|---|---|
Use Scenario: DC input stage of DIN-rail mounted 24 V power supply exposed to load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed across input terminals to clamp surges before they reach rectifier and controller ICs. Use Value: Limits transient voltage to ≤13.4 V at 45 A, preventing damage to 30 V-rated MOSFETs and PWM controllers. | Use Scenario: Analog sensor interface (e.g., thermocouple amplifier) in portable ultrasound device connected to external probes. IC Role / Device Role / Timing Role: Line protector on low-voltage analog input traces susceptible to ESD discharge from human contact. Use Value: Sub-1 ns response and <50 µA leakage preserve signal fidelity while surviving >16 kV HBM discharges per IEC 61000-4-2. |
| Communication System DC Bias Lines | Numerical Control I/O Module Protection |
Use Scenario: +5 V bias line feeding RS-485 transceivers in factory-floor Ethernet-to-fieldbus gateways. IC Role / Device Role / Timing Role: Primary surge clamp on power rail feeding isolated data transceivers and level shifters. Use Value: UL 497B recognition validates use in safety-isolated circuits; 600 W peak power handles repetitive surge events in noisy plant environments. | Use Scenario: Digital input channel (24 V sinking) on CNC machine PLC module exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Front-end transient suppressor on each discrete input line before optocoupler isolation stage. Use Value: Axial lead mechanical robustness supports vibration-prone mounting; 175 °C max junction temperature accommodates sealed enclosure thermal buildup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0A | Surface-mount SMB package; 9.0 V VBR; 12.6 V VC @ 48.2 A; same 600 W rating. | Requires PCB re-layout for SMT; better high-frequency performance due to lower parasitic inductance. | Select when space-constrained designs demand SMT or when minimizing trace inductance is critical for sub-10 ns transients. |
| 1.5KE9.1A | Same axial package but 1.5 kW peak power; 13.4 V VC @ 112 A; higher surge capacity. | Overqualified for 600 W needs; larger physical size and higher cost where 600 W suffices. | Select only when legacy 1.5KE footprint compatibility is required or when system-level testing demands >45 A surge margin. |
Compared with SMBJ9.0A and 1.5KE9.1A, the P6KE9.1A offers optimal balance of proven axial reliability, UL 497B certification for isolated systems, and cost-effective 600 W surge handling-making it preferred for industrial power entry and medical analog interfaces where through-hole robustness and safety recognition are prioritized.
Availability
P6KE9.1A is available at Aetrix Electronics and suitable for industrial power supplies, medical diagnostic equipment, communication system DC bias rails, and numerical control I/O modules requiring stable component supply across multi-year production cycles.
Supply support for P6KE9.1A 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 energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and medical markets.
The P6KE9.1A belongs to the P6KE6.8A Series of 600 W axial-leaded TVS diodes, engineered specifically for cost-sensitive, high-reliability transient protection in industrial and medical equipment where UL 497B recognition and wide temperature operation are mandatory.
FAQ
What is the maximum clamping voltage of the P6KE9.1A under surge conditions?
The P6KE9.1A has a maximum clamping voltage (VC) of 13.4 V when subjected to its rated 45 A peak pulse current (IPP) with a 1 ms exponential waveform. This value is measured per Figure 4 in the datasheet and represents the upper limit of voltage seen by downstream components during a worst-case transient event. Designers must ensure that this clamped voltage remains below the absolute maximum ratings of protected ICs.
Does the P6KE9.1A meet UL 497B requirements for isolated loop protection?
Yes, the P6KE9.1A is explicitly recognized by Underwriters Laboratories under UL 497B (File #E116110) for use in isolated loop circuit protection. This certification covers dielectric withstand, endurance conditioning, and strike voltage breakdown tests-validating its suitability in safety-critical medical and telecom isolation barriers where regulatory compliance is mandatory.
What is the reverse leakage current specification for the P6KE9.1A at its working voltage?
The P6KE9.1A specifies a maximum reverse leakage current (IR) of 50 µA at its working peak reverse voltage (VRWM) of 7.78 V, measured at 25 °C. This low leakage ensures minimal power loss and signal interference in always-on monitoring circuits, such as sensor bias rails or low-power microcontroller I/O protection paths.
Can the P6KE9.1A be used in bidirectional transient protection applications?
No, the P6KE9.1A is a unidirectional TVS diode and is not suitable for bidirectional protection. It conducts only during reverse overvoltage events (cathode positive relative to anode). For AC or bipolar signal line protection, a bidirectional variant such as P6KE9.1CA must be selected-its marking, packaging, and electrical behavior differ fundamentally from the P6KE9.1A.
What is the thermal resistance and steady-state power rating of the P6KE9.1A?
The P6KE9.1A has a junction-to-lead thermal resistance (RJL) of 20 °C/W and a steady-state power dissipation (PD) of 5.0 W at lead temperature (TL) ≤ 75 °C. Above 75 °C, power must be linearly derated at 50 mW/°C, as shown in Figure 5 of the datasheet-critical for enclosed industrial enclosures where ambient temperatures exceed 75 °C.
P6KE9.1A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- P6KE
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 7.78V
- Voltage - Breakdown (Min):
- 8.65V
- Voltage - Clamping (Max) @ Ipp:
- 13.4V
- Current - Peak Pulse (10/1000µs):
- 45A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-15
P6KE9.1A FAQ
1.How can I place an order for P6KE9.1A through Aetrix?
Please submit a Request for Quotation (RFQ) for P6KE9.1A 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 P6KE9.1A reliable?
The price and inventory of P6KE9.1A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6KE9.1A is usually 5 days.
3.What payment methods are accepted for P6KE9.1A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6KE9.1A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6KE9.1A?
P6KE9.1A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6KE9.1A 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 P6KE9.1A?
For technical support, including P6KE9.1A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6KE9.1A requirements.
6.How does Aetrix verify that P6KE9.1A is sourced from the original manufacturer or authorized distributors?
All P6KE9.1A 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 P6KE9.1A meets industry standards.
7.What is the process for return or replacement of P6KE9.1A?
All P6KE9.1A units undergo pre-shipment inspection (PSI). If there is an issue with P6KE9.1A, 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 P6KE9.1A part is unused and in its original packaging.
Return procedure for P6KE9.1A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6KE9.1A Tags
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