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Vishay General Semiconductor - Diodes Division P4SMA51CA-E3/61
- Part No.:
- P4SMA51CA-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA51CA-E3/61.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA51CA-E3/61 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 or power lines. It features a 51 V breakdown voltage (VBR = 48.5–53.6 V at IT = 1.0 mA), 70.1 V maximum clamping voltage (VC) at 5.7 A peak pulse current (IPPM), and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and automotive electronics.
For engineers reviewing the P4SMA51CA-E3/61 datasheet, P4SMA51CA-E3/61 pinout, P4SMA51CA-E3/61 application, or P4SMA51CA-E3/61 equivalent, key selection considerations include bidirectional clamping capability, SMA (DO-214AC) package compatibility, AEC-Q101 qualification status, and thermal resistance (RθJA = 120 °C/W) under standard PCB pad layout.
Technical Context
The P4SMA51CA-E3/61 operates as a bidirectional avalanche diode, providing symmetrical clamping in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), enabling effective suppression of ESD, lightning-induced surges, and inductive switching transients.
It delivers 400 W peak pulse power (10/1000 µs) up to 91 V and derates to 300 W above that threshold. With a maximum reverse leakage of 1.0 µA at 43.6 V stand-off voltage (VWM) and temperature coefficient of VBR at +0.102 %/°C, it maintains predictable clamping behavior across -65 °C to +150 °C operating junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V at IT = 1.0 mA - defines reliable conduction onset under transient stress |
| VWM | 43.6 V - maximum continuous reverse voltage before significant leakage begins |
| VC @ IPPM | 70.1 V at 5.7 A - clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 400 W (10/1000 µs) - surge energy handling capacity on standard 5.0 mm × 5.0 mm copper pads |
| IPPM | 5.7 A - peak surge current the device safely diverts without failure |
| RθJA | 120 °C/W - thermal resistance from junction to ambient, critical for PCB thermal design |
| TJmax | +150 °C - maximum allowable junction temperature for sustained reliability |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Bidirectional construction means no cathode band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive polarity) | One terminal of symmetrical avalanche junction; connects to line being protected |
| Cathode | Transient current entry (negative polarity) | Second terminal of symmetrical junction; connects to same line - no polarity distinction |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 400 W peak pulse power | Supports robust surge immunity per IEC 61000-4-5 Level 3 (1 kV/2 Ω) on properly laid out PCBs |
| AEC-Q101 qualified (HE3/HM3 variants) | P4SMA51CA-E3/61 itself is commercial grade; HE3 suffix denotes automotive-grade version with validated reliability |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
| Glass-passivated junction | Ensures long-term stability of VBR and low parameter drift over temperature and life |
Applications
| Automotive Sensor Signal Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN, LIN, or analog sensor outputs (e.g., pressure, temperature) from load dump and ESD in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential or single-ended signal traces to clamp transients before they reach MCU ADC or transceiver inputs. Use Value: Prevents latch-up or permanent damage to sensitive analog front-ends while maintaining signal integrity below 43.6 V normal operation. |
Use Scenario: Safeguarding digital input/output channels on programmable logic controllers exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Parallel-connected TVS on each I/O pin to shunt >5 A transients away from optocouplers or level translators. Use Value: Enables >400 W surge handling per channel with <70.1 V clamping, reducing need for additional filtering or isolation components. |
| Telecom Line Interface Protection | Consumer Power Adapter ESD Guard |
|
Use Scenario: Shielding Ethernet PHY or RS-485 transceivers from induced lightning surges on outdoor cabling. IC Role / Device Role / Timing Role: Bidirectional clamping device placed between connector and transceiver, referenced to local ground plane. Use Value: Provides sub-1 ns response to fast-rising transients while sustaining 1.0 µA leakage at 43.6 V - minimizing standby power impact. |
Use Scenario: Adding secondary-level surge protection on DC output rails of wall adapters powering IoT devices. IC Role / Device Role / Timing Role: Final-stage TVS across +VOUT and GND to absorb residual transients escaping primary Y-cap and MOV stages. Use Value: Delivers 70.1 V clamping at full rated surge current, ensuring downstream LDOs or PMICs remain within absolute maximum ratings. |
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 PPPM = 600 W, larger SMB (DO-214AA) package, RθJA ≈ 80 °C/W | Better suited for higher-energy surges; requires larger PCB footprint and thermal relief | Select when system-level surge testing exceeds 400 W or when lower thermal resistance is required |
| 1.5KE51CA | Through-hole DO-15 package, PPPM = 1500 W, VC = 88.0 V at 17.1 A | Designed for board-edge or chassis-level protection; not SMT-compatible | Choose for legacy through-hole designs or where higher peak current handling justifies manual assembly |
Compared with SMBJ51CA and 1.5KE51CA, the P4SMA51CA-E3/61 offers optimal balance of compact SMA footprint, 400 W surge rating, and commercial-grade cost-making it ideal for space-constrained, high-volume SMT applications where 70.1 V clamping and 5.7 A IPPM meet system-level immunity requirements.
Availability
P4SMA51CA-E3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line drivers, and consumer power adapter designs requiring stable component supply and RoHS-compliant sourcing.
Supply support for P4SMA51CA-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA series is engineered for surface-mount transient suppression in cost-sensitive, high-volume applications - delivering standardized TVS performance in the industry-standard SMA package with AEC-Q101 options for automotive use.
FAQ
What is the clamping voltage of P4SMA51CA-E3/61 at its rated peak pulse current?
The P4SMA51CA-E3/61 has a maximum clamping voltage (VC) of 70.1 V at its rated peak pulse current (IPPM) of 5.7 A, measured using the standard 10/1000 µs waveform. This value ensures downstream components see no more than 70.1 V during a defined surge event, directly supporting design margin calculations for IC absolute maximum ratings. The P4SMA51CA-E3/61 achieves this with minimal voltage overshoot due to its fast avalanche response.
Is P4SMA51CA-E3/61 suitable for automotive applications?
P4SMA51CA-E3/61 is RoHS-compliant and built on Vishay's commercial-grade platform. While the base P4SMA51CA-E3/61 is not AEC-Q101 qualified, Vishay offers the P4SMA51CAHE3_A variant (with HE3 suffix) which is fully AEC-Q101 qualified for automotive use. Engineers selecting P4SMA51CA-E3/61 for automotive prototypes should verify qualification status via ordering code and consult Vishay's automotive datasheet revision for P4SMA51CAHE3_A to ensure compliance with vehicle-level reliability requirements.
What does the "CA" suffix indicate in P4SMA51CA-E3/61?
The "CA" suffix in P4SMA51CA-E3/61 denotes a bidirectional configuration - meaning the device provides symmetrical transient voltage suppression for both positive and negative polarity surges without requiring orientation during placement. Unlike unidirectional "A" variants, the CA version has no cathode band marking and exhibits identical VBR, VWM, and VC characteristics in either direction. This makes P4SMA51CA-E3/61 ideal for protecting AC-coupled lines or floating interfaces where polarity is undefined.
What is the thermal resistance of P4SMA51CA-E3/61, and how does it affect layout?
The P4SMA51CA-E3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 PCB with no internal copper planes. To maintain safe junction temperatures under repetitive surge conditions, designers must allocate adequate copper area and avoid excessive trace length or narrow connections. The P4SMA51CA-E3/61's RθJA directly informs minimum pad size and thermal relief design in layout.
How does P4SMA51CA-E3/61 compare to unidirectional P4SMA51A-E3/61 in terms of electrical performance?
The P4SMA51CA-E3/61 and unidirectional P4SMA51A-E3/61 share identical breakdown voltage (48.5–53.6 V), stand-off voltage (43.6 V), clamping voltage (70.1 V), and peak pulse power (400 W). The sole functional difference is polarity: P4SMA51CA-E3/61 conducts symmetrically in both directions, while P4SMA51A-E3/61 conducts only from anode to cathode and requires correct orientation. For bidirectional signal paths or AC lines, P4SMA51CA-E3/61 eliminates orientation risk and simplifies assembly - making it the preferred choice unless unidirectional blocking is specifically required.
P4SMA51CA-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:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA51CA-E3/61 FAQ
1.How can I place an order for P4SMA51CA-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA51CA-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 P4SMA51CA-E3/61 reliable?
The price and inventory of P4SMA51CA-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 P4SMA51CA-E3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA51CA-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA51CA-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA51CA-E3/61?
P4SMA51CA-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA51CA-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 P4SMA51CA-E3/61?
For technical support, including P4SMA51CA-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA51CA-E3/61 requirements.
6.How does Aetrix verify that P4SMA51CA-E3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA51CA-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 P4SMA51CA-E3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA51CA-E3/61?
All P4SMA51CA-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA51CA-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 P4SMA51CA-E3/61 part is unused and in its original packaging.
Return procedure for P4SMA51CA-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA51CA-E3/61 Tags
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