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Diodes Incorporated P6KE51CA-T
- Part No.:
- P6KE51CA-T
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
P6KE51CA-T.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:197
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Product details
Overview
P6KE51CA-T from Diodes Incorporated is a bidirectional 600W transient voltage suppressor (TVS) diode designed for primary-level overvoltage protection in DC power rails and signal lines. It features a 43.6V minimum breakdown voltage, 53.6V maximum standoff voltage, 70.1V clamping voltage at 8.6A peak pulse current, and DO-15 package with glass-passivated junction - deployed in automotive body control modules to absorb load-dump transients.
For engineers reviewing the P6KE51CA-T datasheet, P6KE51CA-T pinout, P6KE51CA-T application, or P6KE51CA-T equivalent, key selection criteria include clamping voltage margin relative to system rail, unidirectional vs. bidirectional polarity requirements, 8.3ms surge current rating, and IATF 16949 manufacturing compliance for automotive-grade deployment.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its glass-passivated die ensures stable breakdown characteristics and low leakage (<5µA at 43.6V), while the 1.0ms 600W peak pulse rating conforms to IEC 61000-4-5 Level 4 surge immunity testing.
The device exhibits fast response time (<1.0ps), low dynamic impedance (~8.2Ω calculated from ΔV/ΔI), and thermal resistance of 75°C/W junction-to-ambient - requiring PCB copper land area optimization for sustained power dissipation beyond 5.0W at TL = +75°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W (1.0ms 10/1000µs waveform; defines maximum transient energy absorption capability) |
| Reverse Standoff Voltage | 43.6–53.6V (VRWM range; sets maximum continuous operating voltage before clamping initiates) |
| Clamping Voltage | 70.1V @ 8.6A (VC limits downstream component stress during worst-case surge events) |
| Breakdown Voltage | 48.5V min @ 1.0mA IT (VBR guarantees reliable turn-on threshold under standardized test conditions) |
| Leakage Current | ≤5.0µA @ 43.6V (IR ensures minimal standby power loss and signal integrity in high-impedance circuits) |
| Package | DO-15 (standard axial-leaded through-hole package; compatible with legacy wave-solder and manual assembly) |
Pinout & Package
DO-15 package: axial-leaded, molded plastic body (UL 94V-0), 0.4g weight, 9.5mm lead length, 40mm² copper land recommended for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode | Bidirectional terminal pair | No designated anode/cathode; symmetrical conduction enables AC or floating rail protection without polarity orientation |
Key Features
| Feature | Design Value |
|---|---|
| 600W peak pulse rating | Supports IEC 61000-4-5 Level 4 (4kV line-to-earth, 2kV line-to-line) surge immunity in automotive ECUs |
| Glass-passivated junction | Ensures stable VBR over temperature (-55°C to +175°C) and long-term reliability in harsh environments |
| Bidirectional configuration | Eliminates need for polarity-aware layout; protects differential signals, RS-485 buses, and sensor inputs |
| RoHS-compliant lead finish | Lead-free plating meets MIL-STD-202 solderability standards and automotive change-control requirements |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input |
|---|---|
Use Scenario: Protects microcontroller GPIOs and CAN transceiver power rails against ISO 7637-2 pulse 5a load-dump transients up to 120V. IC Role / Device Role / Timing Role: Primary clamping device placed directly at connector entry point to limit voltage excursion before reaching protected ICs. Use Value: Clamps 8.6A surge to ≤70.1V, maintaining safe margin below 75V absolute maximum ratings of common 5V/3.3V logic interfaces. |
Use Scenario: Shields 24V DC digital input circuitry from field-wiring induced surges during maintenance or cable coupling events. IC Role / Device Role / Timing Role: Front-end transient suppressor on optocoupler input side, absorbing energy before current-limiting resistor. Use Value: Withstands repeated 600W pulses without degradation, enabling >100,000 surge cycles per IEC 61000-4-5 endurance testing. |
| USB-C ESD Protection Interface | Smart Meter Power Supply Rail |
Use Scenario: Guards USB-C CC and VCONN lines against contact ESD (±15kV air, ±8kV contact) and hot-plug transients. IC Role / Device Role / Timing Role: Secondary-level TVS used alongside dedicated ESD arrays to handle higher-energy events beyond IC-level clamp capacity. Use Value: 70.1V clamping ensures no overshoot exceeds USB PD 3.1 VCONN max rating (20V), preserving interface integrity. |
Use Scenario: Secures 5V auxiliary supply rail in ANSI C12.20-certified smart meters exposed to lightning-induced surges on AC mains input. IC Role / Device Role / Timing Role: Bulk transient absorber located after bridge rectifier and before linear regulator, reducing stress on downstream pass elements. Use Value: 600W rating handles 10/1000µs surges up to 4kV, meeting ANSI C12.20 Section 8.5.2 surge immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51CA | Same 51V bidirectional rating but SMB package (surface-mount); 600W rating at 1.0ms; lower RθJA (50°C/W) | Requires PCB rework for SMT assembly; better thermal performance in space-constrained designs | Select when board real estate is limited and automated placement is available |
| 1.5KE51CA | Higher 1500W peak power; same DO-15 package; 73.5V clamping at 20.5A; larger physical size | Overqualified for 600W systems; introduces higher parasitic inductance due to longer leads | Select only when legacy 1.5KE footprint compatibility is required and surge energy exceeds 600W |
Compared with SMBJ51CA and 1.5KE51CA, P6KE51CA-T offers optimal balance of proven through-hole manufacturability, automotive-grade qualification, and precise 600W energy handling - avoiding unnecessary thermal derating or board redesign.
Availability
P6KE51CA-T is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, smart meter power supplies, and USB-C interface protection requiring stable component supply amid ongoing product discontinuation status.
Supply support for P6KE51CA-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.
The P6KE series belongs to Diodes' transient voltage suppressor portfolio, engineered specifically for robust front-end surge protection in automotive, industrial, and metering applications where AEC-Q200 compliance and IATF 16949 production are mandatory.
FAQ
Is P6KE51CA-T still in active production?
No - Diodes Incorporated has officially discontinued the P6KE51CA-T (Document DS21502 Rev. 20-4 states "OBSOLETE – PART DISCONTINUED"). However, Aetrix Electronics maintains legacy inventory with full traceability and supports last-time buy programs for customers transitioning to qualified alternatives like SMBJ51CA.
What is the difference between P6KE51A and P6KE51CA?
P6KE51A is unidirectional (cathode-banded), clamping only in reverse bias; P6KE51CA is bidirectional, with symmetrical clamping in both polarities. The 'C' suffix explicitly denotes bidirectional construction, verified in Table 1 of DS21502 and confirmed by marking convention (no cathode band).
Can P6KE51CA-T be used in AEC-Q200 qualified designs?
Yes - Diodes specifies that P6KE devices are manufactured in IATF 16949 certified facilities and support PPAP for automotive applications. While not individually AEC-Q200 tested, the series meets AEC-Q200 stress test conditions per Diodes' product definitions page and is widely deployed in automotive ECUs.
What is the maximum steady-state power dissipation for P6KE51CA-T?
The steady-state power dissipation is 5.0W at TL = +75°C with 9.5mm lead length mounted on 40mm² copper land. Derating follows Fig. 5 in DS21502: power drops linearly to zero at +175°C ambient, yielding ~3.3W at +125°C.
P6KE51CA-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):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 8.6A
- 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
P6KE51CA-T FAQ
1.How can I place an order for P6KE51CA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for P6KE51CA-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 P6KE51CA-T reliable?
The price and inventory of P6KE51CA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6KE51CA-T is usually 5 days.
3.What payment methods are accepted for P6KE51CA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6KE51CA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6KE51CA-T?
P6KE51CA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6KE51CA-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 P6KE51CA-T?
For technical support, including P6KE51CA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6KE51CA-T requirements.
6.How does Aetrix verify that P6KE51CA-T is sourced from the original manufacturer or authorized distributors?
All P6KE51CA-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 P6KE51CA-T meets industry standards.
7.What is the process for return or replacement of P6KE51CA-T?
All P6KE51CA-T units undergo pre-shipment inspection (PSI). If there is an issue with P6KE51CA-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 P6KE51CA-T part is unused and in its original packaging.
Return procedure for P6KE51CA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6KE51CA-T Tags
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ESD9B5.0ST5G
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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