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Diodes Incorporated P6KE91A-T
- Part No.:
- P6KE91A-T
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
P6KE91A-T.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:2,177
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Product details
Overview
P6KE91A-T from Diodes Incorporated is a unidirectional 600W transient voltage suppressor (TVS) diode designed for primary-side overvoltage protection in DC power rails and signal lines. It features a 77.8V minimum breakdown voltage, 95.5V maximum clamping voltage at 4.8A peak pulse current, and DO-15 glass-passivated package-used in industrial power supplies, automotive body control modules, and telecom interface protection.
For engineers reviewing the P6KE91A-T datasheet, P6KE91A-T pinout, P6KE91A-T application, or P6KE91A-T equivalent, key selection criteria include standoff voltage (77.8–86.5V), clamping performance (VC = 125V @ IPP = 4.8A), thermal resistance (RθJA = 75°C/W), and RoHS-compliant lead-free plating per MIL-STD-202.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: it remains high-impedance below 77.8V reverse standoff, then avalanches rapidly to clamp transients up to 600W (1ms pulse). Its glass-passivated junction ensures stable leakage (<5µA @ 77.8V) and fast response (<1.0ps).
Thermal design relies on its DO-15 package's 20°C/W junction-to-case resistance and 75°C/W junction-to-ambient rating. Derating begins above +25°C ambient, with full power limited to TL = +75°C on 40mm² copper land.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W (1ms 10/1000µs waveform); sustains single surge events without failure |
| Reverse Standoff Voltage (VRWM) | 77.8V; maximum continuous DC or RMS voltage before significant leakage |
| Breakdown Voltage (VBR) | 86.5V min @ 1.0mA; guaranteed avalanche initiation threshold |
| Clamping Voltage (VC) | 125V max @ 4.8A IPP; defines worst-case protected-line voltage during surge |
| Peak Pulse Current (IPP) | 4.8A @ VC = 125V; quantifies surge-handling capacity under standardized test |
| Leakage Current (IR) | <5.0µA @ 77.8V; ensures minimal standby power loss in always-on circuits |
| Package | DO-15; industry-standard axial leaded package with UL 94V-0 molded plastic body |
Pinout & Package
DO-15 package: axial-leaded, glass-passivated silicon junction in molded plastic case (UL 94V-0), 0.4g mass, 9.5mm lead length for thermal mounting. Cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to circuit ground or low-voltage reference; completes clamping path |
| Cathode | High-side connection point | Connected to protected line; avalanche conduction occurs from cathode to anode during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 600W peak pulse power rating | Enables robust protection against IEC 61000-4-5 Level 4 surges (4kV/2Ω) on 24V/48V systems |
| Glass-passivated die construction | Improves long-term reliability and moisture resistance vs. epoxy-passivated alternatives |
| Fast response time (<1.0ps) | Clamps transients before downstream ICs experience damaging overvoltage |
| RoHS-compliant lead finish | Solderable per MIL-STD-202 Method 208; supports lead-free reflow and wave soldering |
| Unidirectional polarity | Provides DC rail protection without reverse-bias conduction during normal operation |
Applications
| Industrial Power Supply Input | Automotive Body Control Module |
|---|---|
Use Scenario: 24V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Primary shunt TVS for bulk overvoltage suppression upstream of DC-DC converter. Use Value: Clamps 125V transients at 4.8A, limiting stress on input capacitors and rectifier bridge while maintaining VRWM margin above 24V nominal. |
Use Scenario: LIN bus line protection in door module ECU subjected to battery reversal and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional clamping device placed between LIN transceiver and vehicle battery rail. Use Value: Blocks reverse polarity up to –77.8V while clamping positive spikes to ≤125V, preserving transceiver integrity without adding capacitance. |
| Telecom Interface Protection | Renewable Energy Charge Controller |
Use Scenario: RS-485 data line protection in outdoor base station equipment subject to lightning-induced surges. IC Role / Device Role / Timing Role: Secondary-level TVS on differential pair, coordinated with GDT and series impedance. Use Value: Adds <5µA leakage at 77.8V and sub-1ps response to complement front-end gas discharge tube, reducing let-through voltage. |
Use Scenario: PV array input stage of solar charge controller where open-circuit voltage reaches 100V under cold conditions. IC Role / Device Role / Timing Role: Overvoltage clamp on MPPT input to prevent MOSFET gate oxide damage during transient overvoltage events. Use Value: Withstands 600W pulses and maintains 77.8V standoff, allowing safe operation near PV Voc while clamping to 125V during surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A-T | Lower 600W rating but SMB package (surface-mount); 85.5V VRWM, 123V VC @ 4.9A | Requires PCB real estate optimization; better for automated SMT assembly than through-hole DO-15 | Select when board space is constrained and reflow compatibility is required over axial lead mechanical robustness |
| 1.5KE91A | Same DO-15 package but 1500W rating; 77.8V VRWM, 125V VC @ 12A; higher thermal mass | Overqualified for 600W needs; larger junction capacitance may affect high-speed signal lines | Choose only if system-level surge testing exceeds IEC 61000-4-5 Level 4 or requires extended pulse handling |
Compared with SMBJ90A-T and 1.5KE91A, P6KE91A-T delivers optimal balance of axial-mount mechanical stability, precise 77.8V–86.5V breakdown tolerance, and verified 600W surge capability-making it ideal for cost-sensitive, through-hole industrial and automotive power rail protection where footprint and thermal derating are well-characterized.
Availability
P6KE91A-T is available at Aetrix Electronics and suitable for industrial power supply input stages, automotive body control modules, and telecom interface protection requiring stable component supply and legacy DO-15 form factor support.
Supply support for P6KE91A-T 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
P6KE91A-T belongs to the P6KE series of unidirectional TVS diodes engineered specifically for cost-effective, high-reliability overvoltage protection in industrial, automotive, and communications infrastructure applications.
FAQ
Is P6KE91A-T still in active production?
No-P6KE91A-T is officially obsolete per Diodes Incorporated's DS21502 Rev. 20-4 (August 2024). While Aetrix Electronics holds remaining legacy stock, no new production runs are planned. Customers should evaluate SMBJ90A-T or 1.5KE91A as functional replacements based on mounting and surge requirements.
What is the maximum operating temperature for P6KE91A-T?
The P6KE91A-T has an operating junction temperature range of –55°C to +175°C. Its steady-state power dissipation derates linearly above +25°C ambient, reaching zero at +175°C ambient when mounted on specified 40mm² copper land with 9.5mm leads.
Can P6KE91A-T be used in bidirectional configurations?
No-P6KE91A-T is unidirectional only. The bidirectional variant is P6KE91CA-T, which lacks cathode band marking and supports symmetrical clamping for AC or floating signal lines. Substituting A for CA risks reverse conduction and failure in bidirectional applications.
How does P6KE91A-T compare to P6KE82A-T in clamping performance?
P6KE91A-T clamps at 125V @ 4.8A, while P6KE82A-T clamps at 113V @ 5.3A. The higher VRWM of P6KE91A-T provides greater margin against nuisance triggering on 72V nominal systems, but trades 2.5A lower peak current capacity-critical for applications with longer-duration transients.
P6KE91A-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-15
P6KE91A-T FAQ
1.How can I place an order for P6KE91A-T through Aetrix?
Please submit a Request for Quotation (RFQ) for P6KE91A-T 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 P6KE91A-T reliable?
The price and inventory of P6KE91A-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6KE91A-T is usually 5 days.
3.What payment methods are accepted for P6KE91A-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6KE91A-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6KE91A-T?
P6KE91A-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6KE91A-T 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 P6KE91A-T?
For technical support, including P6KE91A-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6KE91A-T requirements.
6.How does Aetrix verify that P6KE91A-T is sourced from the original manufacturer or authorized distributors?
All P6KE91A-T 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 P6KE91A-T meets industry standards.
7.What is the process for return or replacement of P6KE91A-T?
All P6KE91A-T units undergo pre-shipment inspection (PSI). If there is an issue with P6KE91A-T, 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 P6KE91A-T part is unused and in its original packaging.
Return procedure for P6KE91A-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6KE91A-T Tags
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