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Taiwan Semiconductor Corporation P6KE51CAH
- Part No.:
- P6KE51CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
P6KE51CAH.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,215
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Product details
Overview
P6KE51CAH from Taiwan Semiconductor is a bidirectional 600W transient voltage suppressor (TVS) diode designed for robust ESD and surge protection in automotive and industrial power rails. It features a 51V nominal breakdown voltage (VBR min/max = 45.9V/56.1V), 41.3V standoff voltage (VWM), clamps to ≤73.5V at 8.5A peak surge current, and uses DO-204AC (DO-15) package with AEC-Q101 qualification for under-hood applications.
For engineers reviewing the P6KE51CAH datasheet, P6KE51CAH pinout, P6KE51CAH application, or P6KE51CAH equivalent, this device is selected for high-reliability bidirectional overvoltage protection where fast response (<5.0ns), low dynamic impedance, and stable clamping under 10/1000μs transients are critical - especially in CAN bus interfaces, automotive lighting drivers, and 12V/24V system power inputs.
Technical Context
The P6KE51CAH operates as a bidirectional avalanche diode, symmetrically clamping voltage surges in both polarities without requiring external polarity management. Its junction structure delivers low dynamic impedance and sub-5ns response time, enabling effective suppression of EFT (IEC 61000-4-4) and lightning-induced transients (IEC 61000-4-5).
Rated for 600W non-repetitive peak pulse power at 10/1000μs, it sustains operation up to TJ = +175°C and exhibits a VBR temperature coefficient of 0.102%/°C - ensuring predictable clamping behavior across automotive thermal ranges. The device meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 41.3 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC bias margin for 48V systems. |
| VBR (min/max) | 45.9 V / 56.1 V - Breakdown occurs within this range at 1 mA test current; ensures consistent clamping onset across production lots. |
| VC @ IPP | 73.5 V @ 8.5 A - Clamped voltage during 10/1000μs surge; limits downstream IC stress to <74V under worst-case 600W transient. |
| PPK | 600 W - Peak pulse power rating per 10/1000μs waveform; supports IEC 61000-4-5 Level 4 (4kV line-to-ground) compliance. |
| IR @ VWM | <1 μA - Reverse leakage at rated standoff voltage; negligible power loss and signal integrity impact in always-on circuits. |
| TJ max | +175 °C - Maximum junction temperature; enables placement near hot components (e.g., power MOSFETs, engine control units). |
| Package | DO-204AC (DO-15) - Industry-standard axial leaded package with tin-plated leads; compatible with wave soldering and manual rework. |
Pinout & Package
DO-204AC (DO-15) package: axial-leaded, molded epoxy case with cathode band marking for unidirectional variants; P6KE51CAH is bidirectional and marked with part-specific code (no polarity band). Leads are pure tin-plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction terminals | No functional polarity - either lead serves as input/output; enables placement without orientation check in PCB layout. |
| Lead 1 / Lead 2 | Current-carrying terminals | Both leads conduct surge current equally in either direction; requires symmetric trace routing for balanced inductance in high-speed transient paths. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood use including temperature cycling, mechanical shock, and humidity testing - required for ECUs and body control modules. |
| 600W 10/1000μs surge rating | Withstands 4kV IEC 61000-4-5 surges on 12V/24V supply lines without degradation; eliminates need for cascaded protection stages. |
| <5.0 ns response time (bidirectional) | Clamps transients before sensitive logic or analog circuitry responds - critical for protecting CAN transceivers and microcontroller I/O pins. |
| UL 94V-0 flammability rating | Molding compound self-extinguishes under flame exposure; satisfies automotive safety standards for enclosed harness and module assemblies. |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - supports green manufacturing and end-of-life recycling requirements. |
Applications
| Automotive Power Input Protection | CAN Bus Transient Suppression |
|---|---|
|
Use Scenario: 12V battery rail in engine control unit exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping device placed upstream of DC-DC converters and LDOs to limit input voltage excursion. Use Value: Clamps to ≤73.5V during 600W surge, preventing overvoltage damage to 40V-rated power ICs and maintaining system uptime. |
Use Scenario: CAN H/L differential pair in vehicle infotainment gateway subjected to ESD (IEC 61000-4-2 ±8kV contact) and EFT bursts. IC Role / Device Role / Timing Role: Bidirectional TVS shunting common-mode transients between CAN_H/CAN_L and ground. Use Value: Sub-5ns response prevents bit errors during high-speed (500 kbps) CAN communication; low capacitance avoids signal rise-time degradation. |
| Industrial Lighting Driver Protection | Smart Sensor Power Rail Guarding |
|
Use Scenario: Constant-current LED driver in streetlight fixture experiencing inductive switching spikes from relay-controlled ballasts. IC Role / Device Role / Timing Role: Parallel-connected TVS across input capacitor to absorb repetitive 100–500V/10μs spikes. Use Value: 600W rating handles repeated surges without parametric shift; 175°C TJ rating survives ambient >85°C enclosure temperatures. |
Use Scenario: 3.3V/5V power rail of MEMS pressure sensor in HVAC control panel exposed to EFT noise on shared 24V supply. IC Role / Device Role / Timing Role: Secondary protection stage after primary bulk TVS, limiting residual clamped voltage to MCU-safe levels. Use Value: 41.3V VWM allows use on 24V intermediate rail while delivering precise 73.5V clamping - avoids false triggering of brown-out detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51CA | Same 51V bidirectional rating, but 600W rating in smaller SMB package (surface-mount); lower thermal mass and higher mounting density. | Preferred for space-constrained PCBs; less suitable for high-temperature through-hole environments due to lower thermal dissipation. | Select SMBJ51CA when board area is limited and thermal management via copper pour is feasible. |
| 1.5KE51CA | Legacy 1500W TVS in DO-201AD package; same VWM/VBR specs but higher PPK and larger footprint; no AEC-Q101 qualification. | Used in legacy industrial equipment where higher surge margin is needed, but not approved for automotive qualification programs. | Choose 1.5KE51CA only for non-automotive applications requiring >600W headroom and where AEC-Q101 is not mandated. |
Compared with SMBJ51CA and 1.5KE51CA, P6KE51CAH uniquely balances AEC-Q101 compliance, DO-15 through-hole robustness, and 600W surge capability - making it optimal for new automotive designs needing proven reliability without SMT assembly complexity.
Availability
P6KE51CAH is available at Aetrix Electronics and suitable for automotive electronics, industrial lighting systems, and smart sensor modules requiring stable component supply with full AEC-Q101 traceability and long-term lifecycle support.
Supply support for P6KE51CAH 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs - serving automotive, industrial, and consumer markets since 1979.
The P6KE series was engineered specifically for high-reliability transient suppression in harsh environments, with emphasis on AEC-Q101 qualification, tight parameter distribution, and robust packaging for under-hood and factory-floor deployment.
FAQ
What does the "CA" suffix indicate in P6KE51CAH?
The "CA" suffix in P6KE51CAH denotes bidirectional configuration - meaning the device provides symmetrical clamping for both positive and negative transients without polarity sensitivity. This differs from "A"-suffixed unidirectional parts (e.g., P6KE51A), which require correct anode/cathode orientation. The "H" suffix confirms AEC-Q101 qualification, verified per TSC's P2203 specification revision.
How does P6KE51CAH perform under repeated surge stress?
P6KE51CAH is rated for non-repetitive 10/1000μs surges per JEDEC standards; its 600W rating applies to single events. For repetitive transients, derating per Figure 2 in the datasheet is required - e.g., at 75°C ambient, maximum PPK drops to ~420W. Real-world validation shows >10,000 cycles at 50% rated surge without parameter shift when mounted on 5×5 mm copper pads.
Can P6KE51CAH be used on a 3.3V or 5V logic rail?
No - P6KE51CAH is unsuitable for 3.3V/5V logic rails because its 41.3V standoff voltage (VWM) far exceeds those supply levels, resulting in no clamping action until transients exceed ~45.9V. For low-voltage rails, select TVS devices with VWM ≤10% above nominal voltage (e.g., SMAJ5.0CA for 5V systems). Using P6KE51CAH here would leave circuits unprotected.
What is the maximum allowable lead length for P6KE51CAH in high-frequency surge paths?
To preserve sub-5ns response, lead lengths should be minimized: ≤5 mm per lead is recommended for EFT/ESD suppression. Longer leads add parasitic inductance that degrades clamping speed - e.g., 10 mm total loop inductance (~200 nH) can increase clamped voltage by >15V during 100 A/ns transients. Use direct PCB mounting with short traces to ground plane for optimal performance.
Does P6KE51CAH require heatsinking in continuous operation?
No - P6KE51CAH has no steady-state power dissipation requirement; it conducts only during transient events. Its 5W steady-state rating (at 75°C, 9.5mm leads) is for rare fault conditions, not normal operation. In typical surge-protection use, thermal design focuses on transient energy absorption, not continuous cooling - standard DO-15 pad layouts suffice.
P6KE51CAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- P6KE
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 8.9A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
P6KE51CAH FAQ
1.How can I place an order for P6KE51CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for P6KE51CAH 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 P6KE51CAH reliable?
The price and inventory of P6KE51CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6KE51CAH is usually 5 days.
3.What payment methods are accepted for P6KE51CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6KE51CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6KE51CAH?
P6KE51CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6KE51CAH 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 P6KE51CAH?
For technical support, including P6KE51CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6KE51CAH requirements.
6.How does Aetrix verify that P6KE51CAH is sourced from the original manufacturer or authorized distributors?
All P6KE51CAH 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 P6KE51CAH meets industry standards.
7.What is the process for return or replacement of P6KE51CAH?
All P6KE51CAH units undergo pre-shipment inspection (PSI). If there is an issue with P6KE51CAH, 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 P6KE51CAH part is unused and in its original packaging.
Return procedure for P6KE51CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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