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Vishay General Semiconductor - Diodes Division P4SMA51A-E3/61
- Part No.:
- P4SMA51A-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA51A-E3/61.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA51A-E3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 43.6 V standoff voltage (VWM), 48.5–53.6 V breakdown voltage (VBR) at 1 mA, 70.1 V maximum clamping voltage (VC) at 5.7 A peak pulse current, and 400 W peak pulse power rating with a 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.
For engineers reviewing the P4SMA51A-E3/61 datasheet, P4SMA51A-E3/61 pinout, P4SMA51A-E3/61 application, or P4SMA51A-E3/61 equivalent, this device serves as a RoHS-compliant, commercial-grade transient suppressor with AEC-Q101 qualification available via alternate ordering codes, requiring attention to polarity marking, thermal derating above 25 °C, and PCB pad layout per JEDEC DO-214AC standards.
Technical Context
The P4SMA51A-E3/61 operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold (VBR = 48.5–53.6 V), with cathode band indicating polarity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at VWM).
It delivers fast transient response (<1 ns), low incremental surge resistance, and clamps induced surges to ≤70.1 V at 5.7 A (10/1000 µs), while dissipating up to 3.3 W continuously at 50 °C ambient on an infinite heatsink. Thermal resistance is 120 °C/W junction-to-ambient and 30 °C/W junction-to-lead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 43.6 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR (Breakdown Voltage) | 48.5–53.6 V at 1 mA - Confirmed avalanche onset range for reliable clamping activation |
| VC (Clamping Voltage) | 70.1 V at 5.7 A (10/1000 µs) - Peak voltage seen by protected circuit during rated surge |
| PPPM (Peak Pulse Power) | 400 W - Surge energy handling capacity under standard 10/1000 µs waveform |
| IPPM (Peak Pulse Current) | 5.7 A - Maximum non-repetitive surge current the device safely clamps |
| TJ max. | 150 °C - Absolute maximum junction temperature defining thermal design limits |
| Package | SMA (DO-214AC) - Surface-mount outline with 0.208" x 0.157" footprint and matte tin-plated leads |
Pinout & Package
SMA (DO-214AC) package: molded epoxy case with cathode band marking; two-terminal configuration; terminals are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to lower-potential side of protected line; defines polarity for unidirectional operation |
| Cathode | Reverse voltage sensing / Clamping output | Marked with band; connected to higher-potential side; conducts avalanche current to ground during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 3/4 surges without derating below 91 V |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes stress on downstream components by tightly constraining transient overshoot |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without moisture sensitivity concerns |
| AEC-Q101 qualified variant available | Validated for automotive powertrain and body electronics where reliability under thermal cycling is critical |
| Glass passivated junction | Ensures long-term stability of VBR and leakage performance across temperature and life cycles |
Applications
| Industrial Motor Drive Control | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protecting gate drivers and microcontroller I/O from inductive kickback during relay or solenoid switching. IC Role / Device Role / Timing Role: Unidirectional TVS placed between MOSFET gate and source to clamp negative transients and prevent gate oxide damage. Use Value: Limits transient voltage to ≤70.1 V, ensuring gate-source voltage stays within ±20 V absolute maximum rating of common logic-level MOSFETs. |
Use Scenario: Safeguarding LIN bus transceivers and sensor inputs from load dump and jump-start events in 12 V vehicle systems. IC Role / Device Role / Timing Role: Standoff-rated TVS on LIN data line and VCC rail to absorb 100 V/40 ms load dump surges per ISO 7637-2. Use Value: Withstands 400 W pulses and maintains <1 µA leakage at 43.6 V, preserving bus signal integrity during normal operation. |
| Telecom Power Supply Input | Consumer Appliance Sensor Interface |
Use Scenario: Front-end protection for AC-DC adapter secondary-side DC outputs exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device on +5 V/+12 V rails feeding PMICs and communication ICs. Use Value: Fast <1 ns response and 70.1 V clamping ensure downstream regulators see no voltage exceeding their absolute maximum ratings during 1 kV/0.5 µs transients. |
Use Scenario: ESD and switching transient suppression on analog sensor lines (e.g., temperature, humidity) in smart home controllers. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <100 pF at 0 V) placed directly at connector entry to shunt transients before reaching ADC input. Use Value: 43.6 V standoff avoids interference with 3.3 V or 5 V sensor supply rails while clamping >1 kV HBM ESD events per IEC 61000-4-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51A (Bourns) | Same VWM (43.6 V), same VC (70.1 V), but SMB package (DO-214AA) - 2.5 mm wider, 0.3 mm taller | Higher thermal mass supports marginally better repetitive surge handling; requires PCB footprint revision | Select when board space allows larger package and higher IPPM margin (6.4 A vs. 5.7 A) is needed |
| 1.5SMC51A (ON Semiconductor) | Identical electrical specs (VWM, VBR, VC, PPPM), same SMA package, but halogen-free and RoHS-compliant with M3 suffix | No functional difference; validated for same industrial and automotive use cases | Choose for halogen-free compliance requirements without changing layout or thermal design |
Compared with SMBJ51A and 1.5SMC51A, the P4SMA51A-E3/61 offers identical clamping performance in a compact SMA footprint with commercial-grade RoHS compliance, making it optimal for cost-sensitive, space-constrained designs where AEC-Q101 is not mandated.
Availability
P4SMA51A-E3/61 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, telecom power supplies, and consumer appliance sensor protection requiring stable component supply and consistent surge immunity performance.
Supply support for P4SMA51A-E3/61 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series is engineered for high-energy transient suppression in surface-mount power and signal line applications, balancing clamping precision, surge robustness, and manufacturability for automotive, industrial, and computing markets.
FAQ
What is the maximum clamping voltage of the P4SMA51A-E3/61 under standard surge conditions?
The P4SMA51A-E3/61 has a maximum clamping voltage (VC) of 70.1 V when subjected to a 10/1000 µs waveform at its rated peak pulse current of 5.7 A. This value is measured per Figure 1 in the Vishay datasheet (Document Number: 88367) and defines the upper voltage limit imposed on protected circuits during transient events. The P4SMA51A-E3/61 maintains this clamping performance across its specified operating temperature range.
Is the P4SMA51A-E3/61 suitable for automotive applications?
The base P4SMA51A-E3/61 is a commercial-grade part, but Vishay offers AEC-Q101 qualified variants under ordering codes such as P4SMA51AHE3_A. These versions undergo extended stress testing for automotive environments including temperature cycling, humidity bias, and mechanical shock. The P4SMA51A-E3/61 itself is not AEC-Q101 certified, so for automotive use, the HE3-suffixed version must be selected.
What is the thermal resistance of the P4SMA51A-E3/61, and how does it affect PCB layout?
The P4SMA51A-E3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead resistance (RθJL) of 30 °C/W. To maintain safe junction temperatures, the PCB must use minimum recommended copper pad areas (0.2" × 0.2" per terminal) as specified in the datasheet. Reducing pad size increases RθJA, risking thermal runaway during repetitive surges - a key design constraint for the P4SMA51A-E3/61.
How does the P4SMA51A-E3/61 differ from bidirectional TVS diodes like P4SMA51CA?
The P4SMA51A-E3/61 is unidirectional and conducts only in reverse bias above VBR, with polarity marked by a cathode band. In contrast, P4SMA51CA is bidirectional and symmetrically clamps both positive and negative transients, with no polarity marking. The P4SMA51A-E3/61 is intended for DC-biased lines (e.g., power rails), while P4SMA51CA suits AC or floating signal lines - selecting the wrong type risks failure to clamp or unintended conduction.
What is the leakage current specification for the P4SMA51A-E3/61 at its standoff voltage?
At its maximum standoff voltage (VWM = 43.6 V) and TA = 25 °C, the P4SMA51A-E3/61 exhibits a maximum reverse leakage current (ID) of 1.0 µA. This low leakage ensures minimal power loss and signal distortion in always-on circuits, such as sensor bias networks or LIN bus terminations. The P4SMA51A-E3/61 maintains this spec across its full operating temperature range, with leakage increasing predictably per datasheet derating curves.
P4SMA51A-E3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 5.7A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA51A-E3/61 FAQ
1.How can I place an order for P4SMA51A-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA51A-E3/61 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 P4SMA51A-E3/61 reliable?
The price and inventory of P4SMA51A-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA51A-E3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA51A-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA51A-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA51A-E3/61?
P4SMA51A-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA51A-E3/61 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 P4SMA51A-E3/61?
For technical support, including P4SMA51A-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA51A-E3/61 requirements.
6.How does Aetrix verify that P4SMA51A-E3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA51A-E3/61 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 P4SMA51A-E3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA51A-E3/61?
All P4SMA51A-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA51A-E3/61, 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 P4SMA51A-E3/61 part is unused and in its original packaging.
Return procedure for P4SMA51A-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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