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Diodes Incorporated P6KE91CA-T
- Part No.:
- P6KE91CA-T
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
P6KE91CA-T.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:3,831
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Product details
Overview
P6KE91CA-T from Diodes Incorporated is a bidirectional 600W transient voltage suppressor (TVS) diode designed for overvoltage protection in DC power lines and signal interfaces. It features a 77.8V reverse standoff voltage (VRWM), 86.5V minimum breakdown voltage (VBR), 125V maximum clamping voltage (VC) at 4.8A peak pulse current, and DO-15 package with glass-passivated junction - used in industrial power supply input stages and automotive body control modules.
For engineers reviewing the P6KE91CA-T datasheet, P6KE91CA-T pinout, P6KE91CA-T application, or P6KE91CA-T equivalent, key selection criteria include clamping voltage margin relative to protected IC VCC rails, unidirectional vs. bidirectional polarity requirements for AC-coupled or differential bus protection, and thermal derating under sustained surge conditions per IEC 61000-4-5.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling protection of AC signals or floating buses without polarity biasing. Its 1.0mA test current (IT) and 5.0µA max reverse leakage (IR) at VRWM ensure minimal standby power loss in always-on systems.
The device uses a glass-passivated silicon junction for stable breakdown characteristics and fast response (<1ns), with thermal resistance from junction to ambient rated at 75°C/W - requiring careful PCB copper land design (40mm²) to sustain 5.0W steady-state dissipation at TL = +75°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W (1.0ms 10/1000µs waveform; defines maximum single-event surge energy handling) |
| Reverse Standoff Voltage | 77.8V (maximum continuous DC or RMS voltage before significant leakage; sets upper limit for protected circuit operating voltage) |
| Breakdown Voltage | 86.5V min @ 1.0mA (voltage at which avalanche conduction begins; ensures reliable triggering above normal operating range) |
| Clamping Voltage | 125V max @ 4.8A IPP (voltage seen by downstream circuit during surge; must stay below IC absolute maximum ratings) |
| Package | DO-15 (axial leaded, 0.4g weight, UL 94V-0 molded plastic; compatible with through-hole wave soldering and manual repair) |
| Thermal Resistance | 75°C/W junction-to-ambient (dictates required PCB copper area and airflow for thermal management under repeated surges) |
Pinout & Package
DO-15 package: axial-leaded, cylindrical glass-passivated body with cathode band marking omitted for bidirectional configuration. Leads are tin-plated, solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Both terminals function identically; no polarity sensitivity - enables placement on AC lines or differential pairs without orientation check |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC-coupled interfaces (e.g., RS-485, CAN FD) without external polarity logic or dual-device implementation |
| 600W peak pulse rating | Withstands IEC 61000-4-5 Level 4 (4kV line-earth, 2kV line-line) surges when properly mounted on ≥40mm² copper land |
| Glass-passivated die | Ensures stable VBR over temperature (-55°C to +175°C) and long-term reliability in humid or chemically aggressive environments |
| RoHS-compliant lead finish | Lead-free matte tin plating meets EU RoHS 2011/65/EU and supports Pb-free reflow and wave soldering processes |
Applications
| Industrial Power Input Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 24V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and inductive switching transients. IC Role / Device Role: Primary overvoltage clamp limiting transient voltage to <125V during ISO 16750-2 pulse 5a (load dump). Use Value: Prevents damage to upstream rectifier bridge and downstream DC-DC controller ICs by diverting up to 4.8A surge current away from sensitive circuitry. |
Use Scenario: LIN bus transceiver interface in door module subjected to ESD events and battery reverse connection. IC Role / Device Role: Bidirectional surge suppression on LIN data line, clamping both positive and negative transients to ±125V. Use Value: Maintains signal integrity during 8kV contact ESD (IEC 61000-4-2) while adding <1pF capacitance - no data rate degradation at 20kbps. |
| RS-485 Communication Port | AC-DC Adapter Surge Protection |
Use Scenario: Half-duplex RS-485 transceiver (e.g., MAX13487) in building automation node connected to long outdoor cabling. IC Role / Device Role: Common-mode transient suppressor on A/B differential pair referenced to local ground. Use Value: Limits common-mode surge voltage to <125V during lightning-induced surges, preserving transceiver isolation barrier integrity. |
Use Scenario: Secondary-side output of 12V/3A AC-DC adapter subject to conducted surges per IEC 61000-4-5. IC Role / Device Role: Final-stage clamp protecting downstream USB-C PD controller and load switch. Use Value: Clamps output overshoot to ≤125V during 2kV surge tests, preventing latch-up or gate oxide rupture in 12V-rated MOSFETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90CA | Same 90V nominal standoff, but SMB package (surface-mount); 600W rating at 1.0ms; lower clamping voltage (123V @ 4.9A) | Requires PCB redesign for SMT assembly; better thermal performance with 2-layer 1oz copper; unsuitable for through-hole legacy designs | Select when board space is constrained and automated assembly is available; verify pad thermal relief for 5W steady-state dissipation |
| P6KE91A | Unidirectional version; identical VRWM (77.8V), VBR (86.5V), VC (125V); same DO-15 package and 600W rating | Only protects against positive-going transients; requires external polarity network (e.g., series diode) for AC or bidirectional use | Choose only for DC-only lines where reverse polarity surges are impossible; avoids unnecessary bidirectional cost if asymmetry is acceptable |
Compared with P6KE91CA-T, SMBJ90CA offers superior board-level integration and thermal efficiency but mandates SMT infrastructure, while P6KE91A reduces cost and complexity in unidirectional DC systems but cannot protect AC or floating-bus signals without additional components.
Availability
P6KE91CA-T is available at Aetrix Electronics and suitable for industrial power input protection, automotive body control modules, RS-485 communication ports, and AC-DC adapter surge protection requiring stable component supply despite its obsolete status - supported via last-time-buy inventory and cross-reference assistance.
Supply support for P6KE91CA-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, specializing in high-reliability protection, power management, and signal integrity solutions for industrial and automotive markets.
P6KE91CA-T belongs to the P6KE series of 600W axial-leaded TVS diodes, engineered for robust overvoltage clamping in cost-sensitive, high-volume applications where DO-15 compatibility and proven field reliability are critical.
FAQ
Is P6KE91CA-T still in active production?
No - Diodes Incorporated has officially discontinued the P6KE91CA-T (document DS21502 Rev. 20–4 states "OBSOLETE – PART DISCONTINUED"). Aetrix Electronics maintains limited legacy stock and supports transition to validated alternatives like SMBJ90CA or SMF90CA with full parametric and footprint compatibility analysis.
What is the maximum operating temperature for P6KE91CA-T?
The P6KE91CA-T is rated for junction and storage temperatures from –55°C to +175°C. Its steady-state power dissipation drops to 5.0W at TL = +75°C with 9.5mm lead length mounted on 40mm² copper land; derating follows the curve in Figure 4 of DS21502, reaching zero at +175°C ambient.
Can P6KE91CA-T be used in automotive applications?
While P6KE91CA-T meets basic AEC-Q200 environmental stress requirements (temperature, humidity, mechanical shock), it is not AEC-Q101 qualified. For automotive safety-critical modules, Diodes recommends AEC-Q101-qualified alternatives such as the D3SB90CA series - contact Aetrix for validated drop-in replacements with PPAP documentation.
How does bidirectional operation affect PCB layout?
Because P6KE91CA-T has no polarity, PCB layout eliminates orientation constraints - both leads connect directly to protected nodes without cathode band alignment. This simplifies automated placement and reduces assembly errors in high-mix manufacturing, especially for differential buses like RS-485 or CAN where symmetry is inherent.
P6KE91CA-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:
- -
- Bidirectional Channels:
- 1
- 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
P6KE91CA-T FAQ
1.How can I place an order for P6KE91CA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for P6KE91CA-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 P6KE91CA-T reliable?
The price and inventory of P6KE91CA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6KE91CA-T is usually 5 days.
3.What payment methods are accepted for P6KE91CA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6KE91CA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6KE91CA-T?
P6KE91CA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6KE91CA-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 P6KE91CA-T?
For technical support, including P6KE91CA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6KE91CA-T requirements.
6.How does Aetrix verify that P6KE91CA-T is sourced from the original manufacturer or authorized distributors?
All P6KE91CA-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 P6KE91CA-T meets industry standards.
7.What is the process for return or replacement of P6KE91CA-T?
All P6KE91CA-T units undergo pre-shipment inspection (PSI). If there is an issue with P6KE91CA-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 P6KE91CA-T part is unused and in its original packaging.
Return procedure for P6KE91CA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6KE91CA-T Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
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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Diodes Incorporated
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