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Vishay General Semiconductor - Diodes Division P4SMA51CAHE3/61
- Part No.:
- P4SMA51CAHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA51CAHE3/61.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,308
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Product details
Overview
P4SMA51CAHE3/61 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P4SMA series, designed for clamping voltage transients on signal and power lines. It features a 51 V breakdown voltage (VBR), 400 W peak pulse power (10/1000 µs), and clamps to 70.1 V at 5.7 A peak pulse current - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the P4SMA51CAHE3/61 datasheet, P4SMA51CAHE3/61 pinout, P4SMA51CAHE3/61 application, or P4SMA51CAHE3/61 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, SMA (DO-214AC) package compatibility, and thermal resistance (RθJA = 120 °C/W) for board-level transient immunity design.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1 µA at 43.6 V stand-off), while meeting MSL Level 1 moisture sensitivity and JESD201 Class 2 whisker resistance requirements.
The device delivers fast response time (<1 ns) and low incremental surge resistance, enabling effective suppression of ESD (IEC 61000-4-2), EFT (IEC 61000-4-4), and lightning-induced surges (10/1000 µs). It is rated for continuous power dissipation of 3.3 W and junction temperatures up to +150 °C, supporting operation in harsh automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 48.5–53.6 V at 1 mA test current - defines precise clamping onset threshold for overvoltage events |
| Stand-off Voltage VWM | 43.6 V maximum - ensures no conduction during normal circuit operation up to rated working voltage |
| Clamping Voltage VC | 70.1 V at 5.7 A IPPM - limits transient voltage seen by downstream ICs to safe levels |
| Peak Pulse Power PPPM | 400 W (10/1000 µs waveform) - sustains high-energy surges without failure under standard test conditions |
| Package | SMA (DO-214AC) - surface-mount, low-profile package compatible with automated assembly and IPC-7351B land patterns |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| Thermal Resistance RθJA | 120 °C/W - determines junction temperature rise under sustained power dissipation; requires adequate copper pad area (0.2" × 0.2") |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated. Bidirectional configuration has no polarity marking; terminals are symmetrical anode/cathode pairs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient path | Either terminal serves as input/output for clamping; no polarity dependency enables flexible PCB placement |
| Case / Body | Non-connected mechanical structure | No internal connection; provides mechanical anchoring and thermal path via soldered leads only |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±5%), low leakage (<1 µA), and long-term reliability under thermal stress |
| 400 W peak pulse power (10/1000 µs) | Handles high-energy transients common in automotive load-dump and industrial switching noise without degradation |
| AEC-Q101 qualification (HE3 suffix) | Validated for automotive electronics per stress tests including HTOL, TC, and ESD - suitable for under-hood applications |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT processes without preconditioning or special handling |
| Low profile SMA package | 0.208" × 0.157" footprint minimizes board space while maintaining thermal performance via optimized pad layout |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed at connector interface to shunt surge energy before it reaches signal conditioning ICs. Use Value: Maintains signal integrity by limiting transient voltage to ≤70.1 V, preventing latch-up or damage to 5 V/12 V sensor front-ends. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers against field-wiring induced surges and ground bounce. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input channels, operating in parallel with optocoupler isolation barriers. Use Value: Enables compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) standards without adding active circuitry or delay. |
| Telecom Line Interface | Consumer Power Adapter ESD Protection |
Use Scenario: Shielding Ethernet PHYs, RS-485 transceivers, and DSL line drivers from lightning-induced surges on outdoor-facing ports. IC Role / Device Role / Timing Role: First-line transient suppressor on differential pair traces, placed immediately after connector entry point. Use Value: Clamps common-mode transients to <70 V within <1 ns, preserving data integrity and avoiding reset events in communication ICs. |
Use Scenario: Protecting USB-C and barrel jack inputs in AC/DC adapters against user-handling ESD and hot-plug transients. IC Role / Device Role / Timing Role: Secondary-level TVS between input rectifier and primary-side controller, absorbing residual spikes post-filtering. Use Value: Prevents premature failure of MOSFETs and PWM controllers by limiting voltage overshoot to safe margins below their VDS rating. |
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 | Higher 600 W PPPM rating; larger SMB (DO-214AA) package; RθJA = 85 °C/W | Better suited for higher-energy surges but requires 30% more PCB area | Select when system-level surge testing exceeds 400 W or when thermal margin is constrained |
| 1.5KE51CA | Through-hole TO-218 package; 1500 W PPPM; higher capacitance (~100 pF) | Used in legacy designs or where manual assembly or high-power derating is required | Choose only if board redesign for SMT is not feasible or if >600 W surge immunity is mandatory |
Compared with SMBJ51CA and 1.5KE51CA, P4SMA51CAHE3/61 offers optimal balance of compact size, AEC-Q101 compliance, and 400 W surge handling - making it preferred for space-constrained automotive and industrial SMT designs where MSL-1 reflow and bidirectional symmetry are critical.
Availability
P4SMA51CAHE3/61 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface circuits requiring stable component supply, AEC-Q101 traceability, and consistent DO-214AC packaging.
Supply support for P4SMA51CAHE3/61 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 was developed for high-reliability transient suppression in automotive, industrial, and telecom systems - combining AEC-Q101 qualification, low-profile SMT packaging, and precise bidirectional clamping performance.
FAQ
What is the breakdown voltage tolerance for P4SMA51CAHE3/61?
The P4SMA51CAHE3/61 has a specified breakdown voltage (VBR) range of 48.5 V to 53.6 V at 1 mA test current, corresponding to ±5% tolerance around the nominal 51 V rating. This tight tolerance ensures predictable clamping behavior across production lots and temperature ranges, critical for protecting sensitive 48 V automotive electronics and industrial control circuits where overvoltage margins are narrow.
Is P4SMA51CAHE3/61 suitable for automotive applications?
Yes, P4SMA51CAHE3/61 is AEC-Q101 qualified (indicated by the HE3 suffix) and tested for automotive-grade reliability, including high-temperature operating life, temperature cycling, and ESD robustness. It is explicitly intended for use in automotive subsystems such as body control modules, ADAS sensor interfaces, and infotainment power rails where transient immunity and long-term stability are mandated.
What does the "CA" suffix mean in P4SMA51CAHE3/61?
The "CA" suffix in P4SMA51CAHE3/61 denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both forward and reverse directions, with identical VBR, VC, and leakage characteristics across polarity. This eliminates the need for orientation-aware placement and simplifies layout for AC-coupled or differential signal lines like CAN, RS-485, or Ethernet PHY interfaces.
How much PCB copper area is recommended for P4SMA51CAHE3/61 thermal management?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad area per terminal for P4SMA51CAHE3/61 to achieve rated 400 W peak pulse power and maintain RθJA = 120 °C/W. Reducing pad size increases thermal resistance and de-rates pulse power capability - for example, halving pad area may reduce sustainable PPPM by ~25%, directly impacting surge survivability in high-reliability applications.
Does P4SMA51CAHE3/61 have polarity markings on the package?
No, P4SMA51CAHE3/61 has no polarity markings because it is a bidirectional TVS diode - its internal structure consists of two opposing avalanche junctions, making both terminals functionally identical. Unlike unidirectional variants (e.g., P4SMA51A), the CA version omits the cathode band, allowing unrestricted orientation during automated placement and eliminating risk of reverse installation errors.
P4SMA51CAHE3/61 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:
- Discontinued at Digi-Key
- 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):
- 5.7A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA51CAHE3/61 FAQ
1.How can I place an order for P4SMA51CAHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA51CAHE3/61 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 P4SMA51CAHE3/61 reliable?
The price and inventory of P4SMA51CAHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA51CAHE3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA51CAHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA51CAHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA51CAHE3/61?
P4SMA51CAHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA51CAHE3/61 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 P4SMA51CAHE3/61?
For technical support, including P4SMA51CAHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA51CAHE3/61 requirements.
6.How does Aetrix verify that P4SMA51CAHE3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA51CAHE3/61 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 P4SMA51CAHE3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA51CAHE3/61?
All P4SMA51CAHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA51CAHE3/61, 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 P4SMA51CAHE3/61 part is unused and in its original packaging.
Return procedure for P4SMA51CAHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA51CAHE3/61 Tags
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