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Vishay General Semiconductor - Diodes Division P6KE51A/54
- Part No.:
- P6KE51A/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
P6KE51A/54.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,665
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Product details
Overview
P6KE51A from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary-level overvoltage protection in DC power rails and signal lines. It features a 48.5 V minimum breakdown voltage (VBR), 43.6 V maximum stand-off voltage (VWM), 70.1 V clamping voltage (VC) at 8.6 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom power supplies.
For engineers reviewing the P6KE51A datasheet, P6KE51A pinout, P6KE51A application, or P6KE51A equivalent, this device serves as a standardized, AEC-Q101-qualified surge protector for 48 V nominal systems requiring fast response (<1 ns), low leakage (<1 µA at VWM), and robust thermal performance up to 175 °C junction temperature.
Technical Context
The P6KE51A operates as a silicon avalanche diode with glass-passivated junction, enabling sub-nanosecond response to ESD and lightning-induced transients. Its unidirectional polarity uses a cathode band marking and exhibits 3.5 V forward voltage at 50 A surge, validated per JESD 22-B102 solderability standards.
Thermal design relies on DO-204AC (DO-15) package characteristics: 20 °C/W junction-to-lead thermal resistance and 75 °C/W junction-to-ambient rating. Derating begins above 25 °C ambient, with full 600 W capability only at TA ≤ 25 °C and pulse duty cycle ≤ 0.01 %.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43.6 V maximum - ensures reliable blocking of normal 48 V rail operation without leakage-triggered conduction |
| VBR (min/max) | 48.5 V / 53.6 V at 1.0 mA - defines precise avalanche initiation threshold for predictable clamping onset |
| VC @ IPPM | 70.1 V at 8.6 A (10/1000 µs) - limits downstream voltage stress during worst-case surge events |
| PPPM | 600 W - sustains high-energy transients common in automotive load-dump and inductive switching scenarios |
| IFSM | 100 A (8.3 ms half-sine) - withstands repetitive motor-driver or relay-coil turn-off surges without degradation |
| TJ max | 175 °C - supports under-hood and industrial control cabinet deployments without thermal shutdown |
| Leakage ID | ≤1.0 µA at VWM - prevents parasitic loading on low-power sensor bias networks |
Pinout & Package
Package: DO-204AC (DO-15), axial-leaded, molded epoxy case meeting UL 94 V-0 flammability rating; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to system ground or low-side return path in unidirectional clamp configuration |
| Cathode (banded end) | Avalanche conduction terminal | Connected to protected line (e.g., 48 V supply rail); conducts surge current to ground when VIN exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Enables stable, repeatable avalanche behavior across 1000+ surge cycles without parameter drift |
| 600 W peak pulse power (10/1000 µs) | Handles automotive load-dump pulses (ISO 7637-2 Pulse 5a) without failure |
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TC, and HTRB |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., EFT bursts per IEC 61000-4-4) |
| Solder dip rated 275 °C / 10 s | Supports lead-free reflow and wave soldering processes without delamination or parametric shift |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protects microcontroller GPIO and CAN transceiver power pins from load-dump transients during battery disconnect/reconnect events. IC Role / Device Role: Primary overvoltage clamp on 12 V/48 V auxiliary rail feeding MCU peripherals. Use Value: Limits transient voltage to ≤70.1 V, preventing latch-up or gate oxide damage in 3.3 V/5 V logic ICs downstream. |
Use Scenario: Shields 24 V digital input optocoupler front-end from field-wiring induced surges in factory automation cabinets. IC Role / Device Role: First-stage TVS on dry-contact input channel before series current-limiting resistor. Use Value: Clamps 1 kV/500 A surge (IEC 61000-4-5 Level 3) within 1 ns, preserving optocoupler CTR and isolation integrity. |
| Telecom Remote Radio Unit (RRU) Power Supply | Medical Diagnostic Sensor Interface |
Use Scenario: Guards +48 V DC-DC converter input against lightning-induced surges on outdoor fiber-fed base station power lines. IC Role / Device Role: Secondary surge suppression stage following gas discharge tube (GDT) coarse protection. Use Value: Provides <100 V clamping with <1 ns response, ensuring downstream DC-DC controller ICs remain within absolute maximum ratings. |
Use Scenario: Protects low-noise analog front-end (AFE) of patient-connected ECG/EEG sensors from ESD events during handling or cable coupling. IC Role / Device Role: Localized TVS on sensor bias line and reference voltage rail. Use Value: Delivers <1 µA leakage at 43.6 V, avoiding DC offset errors in µV-level biopotential measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51A | Same VWM/VBR/VC specs but in SMA (DO-214AC) surface-mount package; 400 W PPPM | Requires PCB redesign for SMT assembly; lower power rating reduces margin for high-energy transients | Select when board space constraints prohibit axial-leaded components and surge energy is limited to ≤400 W |
| 1.5KE51A | Same DO-204AC package and 600 W rating, but higher VBR (48.5–53.6 V) tolerance range and 1.5 kW peak power capability | Over-spec'd for 48 V systems; larger junction capacitance may affect high-frequency signal integrity | Select when future-proofing for higher surge threat levels or when legacy 1.5KE footprint compatibility is required |
Compared with SMAJ51A and 1.5KE51A, the P6KE51A delivers optimal balance of proven 600 W surge handling, axial-leaded through-hole manufacturability, and tight 43.6 V stand-off for 48 V nominal systems - making it preferred for cost-sensitive, high-reliability industrial and automotive power rail protection.
Availability
P6KE51A is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and telecom remote radio units requiring stable component supply with AEC-Q101 qualification and long-term lifecycle support.
Supply support for P6KE51A 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade validation.
The P6KE series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for cost-effective, high-surge-capability overvoltage protection in commercial and automotive power and signal lines.
FAQ
What is the maximum clamping voltage of the P6KE51A under standard test conditions?
The P6KE51A has a maximum clamping voltage (VC) of 70.1 V when subjected to an 8.6 A peak pulse current with a 10/1000 µs waveform at TA = 25 °C. This value is measured per JEDEC standards and represents the upper limit of voltage seen by downstream circuitry during a defined surge event - critical for ensuring connected ICs remain within their absolute maximum ratings. The P6KE51A maintains this clamping performance across its full operating temperature range.
Is the P6KE51A suitable for automotive applications?
Yes, the P6KE51A is AEC-Q101 qualified, confirming its suitability for automotive applications including body control modules, infotainment power supplies, and sensor interfaces. It meets stress test requirements for high-temperature operating life, temperature cycling, and humidity testing. The P6KE51A's 175 °C maximum junction temperature and robust surge capability make it appropriate for under-hood and cabin-mounted systems where reliability under thermal and electrical stress is mandatory.
How does the P6KE51A differ from bi-directional TVS diodes like P6KE51CA?
The P6KE51A is unidirectional and features a cathode band marking, intended for DC line protection where polarity is fixed - such as +48 V power rails. In contrast, P6KE51CA is bi-directional, lacks polarity marking, and protects AC or bidirectional signal lines (e.g., RS-485, CAN). The P6KE51A offers lower forward voltage (3.5 V at 50 A) and is optimized for asymmetric surge threats, while P6KE51CA provides symmetrical clamping in both directions but with higher VF and no forward conduction path definition.
What is the thermal resistance specification for the P6KE51A in its DO-204AC package?
The P6KE51A has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W and a junction-to-ambient resistance (RθJA) of 75 °C/W, measured in free-air conditions. These values assume standard PCB mounting with 0.375" (9.5 mm) lead length. For sustained power dissipation, thermal design must account for derating above 25 °C ambient - the P6KE51A delivers full 5.0 W power dissipation only at TL = 75 °C with infinite heatsink conditions.
Can the P6KE51A be used in parallel for higher surge current handling?
No, the P6KE51A is not recommended for parallel operation due to inherent parameter variation in VBR (±5 % tolerance) that causes uneven current sharing during surge events. Uneven distribution risks thermal runaway in one device, leading to premature failure. For higher surge capacity, select a single higher-rated device (e.g., 1.5KE51A) or implement staged protection with coordinated GDT/TVS architectures - never rely on paralleling P6KE51A units without active current-balancing circuitry.
P6KE51A/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- 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-204AC (DO-15)
P6KE51A/54 FAQ
1.How can I place an order for P6KE51A/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6KE51A/54 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/54 reliable?
The price and inventory of P6KE51A/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6KE51A/54 is usually 5 days.
3.What payment methods are accepted for P6KE51A/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6KE51A/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6KE51A/54?
P6KE51A/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6KE51A/54 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/54?
For technical support, including P6KE51A/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6KE51A/54 requirements.
6.How does Aetrix verify that P6KE51A/54 is sourced from the original manufacturer or authorized distributors?
All P6KE51A/54 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/54 meets industry standards.
7.What is the process for return or replacement of P6KE51A/54?
All P6KE51A/54 units undergo pre-shipment inspection (PSI). If there is an issue with P6KE51A/54, 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/54 part is unused and in its original packaging.
Return procedure for P6KE51A/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6KE51A/54 Tags
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