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Diodes Incorporated P6KE51A-T
- Part No.:
- P6KE51A-T
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
P6KE51A-T.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO15
- Quantity:
- Payment:
- Shipping:
Inventory:8,057
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Product details
Overview
P6KE51A-T from Diodes Incorporated is a unidirectional 600W transient voltage suppressor (TVS) diode designed for primary-level overvoltage protection in DC power rails and signal lines. It features a 43.6V reverse standoff voltage (VRWM), 48.5V minimum breakdown voltage (VBR), 70.1V maximum clamping voltage (VC) at 8.6A peak pulse current, and DO-15 glass-passivated package - deployed in industrial power supplies and automotive body control modules.
For engineers reviewing the P6KE51A-T datasheet, P6KE51A-T pinout, P6KE51A-T application, or P6KE51A-T equivalent, key selection criteria include clamping performance under 8.3ms surge, thermal derating above +25°C ambient, unidirectional polarity marking, and compatibility with lead-free reflow profiles per J-STD-020 Level 1.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds VBR (48.5–53.6V), it avalanches to divert surge current away from downstream circuitry. Its 600W peak pulse power rating applies to a 1.0ms non-repetitive waveform per IEC 61000-4-5.
Thermal design relies on junction-to-lead resistance (RθJL = 15°C/W) and steady-state dissipation limit (PD = 5.0W at TL = +75°C). The DO-15 package's 0.4g mass and UL 94V-0 molded plastic housing support mechanical robustness in high-vibration environments.
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 | 43.6V (maximum continuous DC or RMS voltage before leakage exceeds 5μA; sets operating rail margin) |
| Breakdown Voltage | 48.5–53.6V @ 1.0mA (avalanche initiation range; ensures reliable turn-on before damage threshold) |
| Clamping Voltage | 70.1V @ 8.6A IPP (voltage seen by protected IC during surge; must stay below downstream device abs max) |
| Package | DO-15 (axial-leaded, 5.5–7.62mm body length; compatible with through-hole wave soldering and manual repair) |
| Operating Temp | −55°C to +175°C (supports under-hood automotive and industrial ambient extremes) |
Pinout & Package
DO-15 package: axial-leaded, glass-passivated silicon die in molded plastic case (UL 94V-0), cathode band marking for unidirectional polarity. Lead finish is lead-free and RoHS-compliant, solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge return path | Connected to system ground or low-side reference; completes clamping loop during transient |
| Cathode | Protected line connection | Connected to input rail or signal line; avalanche conduction occurs from cathode to anode |
Key Features
| Feature | Design Value |
|---|---|
| 600W Peak Pulse Power | Enables protection against IEC 61000-4-5 Level 4 surges (4kV line-earth) without cascading failure |
| Glass Passivated Die | Improves moisture resistance and long-term reliability vs. epoxy-passivated alternatives in humid environments |
| Fast Response Time | <1.0ps intrinsic response ensures clamping activation before most ICs experience latch-up or gate oxide rupture |
| RoHS & Lead-Free Compliant | Meets EU Directive 2011/65/EU with full exemption documentation; supports global manufacturing compliance |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) CAN Bus Line Protection |
|---|---|
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 / Timing Role: Primary shunt TVS placed upstream of input filter capacitor and DC-DC converter IC. Use Value: Clamps 100A/10ms load dump to ≤70.1V, preventing overvoltage stress on front-end rectifier and controller IC. |
Use Scenario: 12V battery-supplied BCM protecting CAN_H/CAN_L lines from ESD and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS on each CAN line referenced to chassis ground, positioned after common-mode choke. Use Value: Limits ESD (IEC 61000-4-2 ±15kV contact) to <100V peak, preserving CAN transceiver integrity without adding capacitance-induced timing skew. |
| Telecom AC-DC Adapter Surge Protection | Smart Meter Battery Backup Circuit Protection |
Use Scenario: Secondary-side 5V/12V output rails of wall-mount telecom adapter subjected to conducted surges via mains coupling. IC Role / Device Role / Timing Role: Final-stage TVS across regulated output, guarding microcontroller and communication ICs. Use Value: Absorbs 600W surge energy while maintaining clamping voltage below 70.1V, ensuring downstream ICs remain within absolute maximum ratings. |
Use Scenario: Lithium-thionyl chloride backup battery interface in utility smart meter, exposed to ESD during field servicing. IC Role / Device Role / Timing Role: Unidirectional TVS between battery positive terminal and system ground, blocking reverse polarity misconnection. Use Value: Withstands 1000V reverse leakage test at VRWM and clamps ESD events to safe levels without degrading ultra-low standby current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51A-T | Same VRWM (43.6V) and VC (70.1V), but SMB package (surface-mount); 600W rating at 1.0ms; lower RθJA (50°C/W vs. 75°C/W) | Requires PCB real estate optimization; better suited for automated SMT assembly and space-constrained designs | Select when board area is limited and thermal path to copper pour is controllable |
| 1.5KE51A-T | Higher peak pulse power (1500W), same DO-15 package; higher VC (73.5V); larger junction capacitance due to die size | Used where higher surge immunity (e.g., outdoor telecom enclosures) justifies increased clamping voltage margin | Select only if system can tolerate ≥73.5V clamping and requires >600W single-pulse capability |
Compared with SMBJ51A-T, P6KE51A-T offers proven through-hole mechanical retention and simpler thermal management in legacy designs; versus 1.5KE51A-T, it trades peak power headroom for tighter clamping and smaller footprint - critical for cost-sensitive industrial controls.
Availability
P6KE51A-T is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and telecom AC-DC adapters requiring stable component supply despite its obsolete status - supported via active inventory and last-time-buy planning.
Supply support for P6KE51A-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 the Americas.
P6KE51A-T belongs to Diodes' P6KE series of 600W axial TVS diodes, engineered for cost-effective, high-reliability overvoltage protection in industrial and automotive power systems where DO-15 form factor and proven surge endurance are prioritized.
FAQ
Is P6KE51A-T still in production?
No - Diodes Incorporated has officially discontinued the P6KE51A-T (document DS21502 Rev. 20-4 states "OBSOLETE – PART DISCONTINUED"). However, Aetrix Electronics maintains active inventory and supports last-time-buy orders with full traceability and extended logistics planning for legacy design continuity.
What is the difference between P6KE51A-T and P6KE51CA-T?
P6KE51A-T is unidirectional (cathode-banded), clamping only negative transients relative to its cathode; P6KE51CA-T is bidirectional, symmetrically clamping both polarities. Electrical specs differ slightly: P6KE51CA-T has identical VRWM (43.6V) but higher IR limit (10μA vs. 5μA) due to bidirectional construction.
Can P6KE51A-T be used in automotive AEC-Q101 qualified designs?
The P6KE51A-T itself is not AEC-Q101 qualified per Diodes' product definitions page. For automotive applications requiring AEC-Q101, PPAP, or IATF 16949 compliance, Diodes recommends contacting their automotive team for qualified alternatives such as the AEC-Q101-certified SMAJ51A or SMCJ51A series.
What is the recommended PCB layout for P6KE51A-T in high-surge applications?
Minimize trace inductance between P6KE51A-T and protected node: use short, wide traces (<5mm), place directly at entry point, connect anode to solid ground plane via multiple vias, and avoid routing sensitive signals near its leads. Thermal relief on cathode pad should be minimized to sustain 5.0W steady-state dissipation at TL = +75°C.
P6KE51A-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):
- 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
P6KE51A-T FAQ
1.How can I place an order for P6KE51A-T through Aetrix?
Please submit a Request for Quotation (RFQ) for P6KE51A-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 P6KE51A-T reliable?
The price and inventory of P6KE51A-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6KE51A-T is usually 5 days.
3.What payment methods are accepted for P6KE51A-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6KE51A-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6KE51A-T?
P6KE51A-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6KE51A-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 P6KE51A-T?
For technical support, including P6KE51A-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6KE51A-T requirements.
6.How does Aetrix verify that P6KE51A-T is sourced from the original manufacturer or authorized distributors?
All P6KE51A-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 P6KE51A-T meets industry standards.
7.What is the process for return or replacement of P6KE51A-T?
All P6KE51A-T units undergo pre-shipment inspection (PSI). If there is an issue with P6KE51A-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 P6KE51A-T part is unused and in its original packaging.
Return procedure for P6KE51A-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6KE51A-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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