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Vishay General Semiconductor - Diodes Division P4SMA51CA-E3/5A
- Part No.:
- P4SMA51CA-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA51CA-E3/5A.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA51CA-E3/5A from Vishay General Semiconductor is a bidirectional surface-mount TRANSZORB® transient voltage suppressor (TVS) designed for clamping inductive and lightning-induced transients across signal and power 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 10/1000 µs waveform - used to protect MOSFETs, sensor interfaces, and ICs in industrial and automotive electronics.
For engineers reviewing the P4SMA51CA-E3/5A datasheet, P4SMA51CA-E3/5A pinout, P4SMA51CA-E3/5A application, or P4SMA51CA-E3/5A equivalent, key selection criteria include bidirectional clamping capability, SMA (DO-214AC) package compatibility, AEC-Q101 qualification status, thermal resistance (RθJA = 120 °C/W), and compliance with UL 497B surge protector classification.
Technical Context
The P4SMA51CA-E3/5A operates as a symmetrical avalanche diode with identical forward and reverse breakdown characteristics, enabling bidirectional transient suppression without polarity sensitivity. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, critical for consistent clamping under repetitive 10/1000 µs surges at 0.01% duty cycle.
Designed for surface-mount assembly on 5.0 mm × 5.0 mm copper pads per terminal, it delivers 400 W peak pulse power up to 91 V and derates to 300 W above that threshold. With a maximum junction temperature of +150 °C and MSL Level 1 moisture sensitivity, it supports lead-free reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43.6 V - maximum continuous reverse working voltage before leakage exceeds 1 µA; defines safe operating margin below clamping threshold |
| VBR @ IT = 1 mA | 48.5–53.6 V - breakdown voltage range where device enters avalanche conduction; ensures predictable turn-on during transients |
| VC @ IPPM = 5.7 A | 70.1 V - clamped voltage during 10/1000 µs surge; limits stress on downstream components like microcontrollers or analog front-ends |
| PPPM | 400 W - peak pulse power handling capacity; enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) |
| IPPM | 5.7 A - peak pulse current supported at rated clamping voltage; determines minimum trace width and PCB layout robustness |
| RθJA | 120 °C/W - junction-to-ambient thermal resistance; requires adequate copper pour or thermal vias for sustained power dissipation |
| TJmax | +150 °C - maximum allowable junction temperature; sets upper limit for ambient + self-heating in sealed enclosures |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking - both terminals are electrically symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Either terminal serves as input/output for bidirectional clamping; no cathode band marking required |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., RS-485, CAN FD) without polarity concerns |
| 400 W peak pulse power (10/1000 µs) | Supports high-energy surge immunity per IEC 61000-4-5 Ed.3, suitable for industrial control cabinet-level protection |
| UL 497B recognized (QVGQ2) | Validated for use in telecom and data line surge protectors requiring third-party safety certification |
| AEC-Q101 qualified (via HE3/HM3 variants) | Meets automotive-grade reliability requirements for engine control, body electronics, and ADAS sensor interfaces |
| MSL Level 1, 260 °C reflow compatible | Eliminates pre-baking requirement and supports standard SMT assembly processes without moisture-related defects |
Applications
| Industrial Sensor Interface Protection | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Protecting 24 V CAN bus transceivers and LIN slave nodes from load dump and ESD events in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pair (CANH/CANL) to clamp common-mode transients while preserving signal integrity. Use Value: Limits clamped voltage to ≤70.1 V during 5.7 A surges, preventing damage to ISO 11898-2 compliant transceivers rated for 70 V absolute max. |
Use Scenario: Safeguarding microcontroller GPIOs and analog sensor inputs (e.g., temperature, humidity) in BCM modules exposed to battery transients. IC Role / Device Role / Timing Role: Point-of-load TVS on 5 V/3.3 V supply rails and I/O lines to absorb coupled spikes from relay switching and alternator ripple. Use Value: Delivers 400 W surge handling with <1 ns response time, ensuring sub-microsecond clamping before MCU latch-up occurs. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Inputs |
|
Use Scenario: Front-end protection of Ethernet PHYs and PoE injectors against lightning-induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Paired bidirectional TVS devices on each differential pair (TX+/TX−, RX+/RX−) meeting UL 497B Class B requirements. Use Value: UL recognition and 70.1 V clamping enable compliance with GR-1089-CORE and ITU-T K.21 heavy-duty surge standards. |
Use Scenario: Input-stage protection for BLDC motor driver ICs in smart washing machines and HVAC fans subjected to inductive kickback. IC Role / Device Role / Timing Role: TVS mounted directly at connector entry point to shunt energy from brushed motor commutation spikes before reaching gate drivers. Use Value: 43.6 V VWM provides 20% margin above 36 V nominal DC bus, while 400 W rating absorbs repeated 100 ms inductive transients. |
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 | Same VWM (43.6 V) and VC (70.1 V), but SMB package (DO-214AA); 600 W PPPM, higher IPPM (8.9 A) | Higher power handling suits higher-energy surge environments; larger footprint may conflict with dense layouts | Select when board space allows and >400 W surge margin is required; not drop-in due to different pad layout |
| 1.5SMC51CA | Same electrical specs, but SMC package (DO-214AB); 1500 W PPPM, 23.2 A IPPM | Designed for primary-level AC/DC input protection; over-specified for signal-line use | Choose only if legacy SMC footprint exists or secondary surge staging is needed; larger size increases parasitic inductance |
Compared with P4SMA51CA-E3/5A, SMBJ51CA offers higher surge margin in a slightly larger package, while 1.5SMC51CA delivers threefold power headroom at the cost of increased board area and slower effective response due to higher package inductance - making P4SMA51CA-E3/5A optimal for compact, cost-sensitive secondary protection.
Availability
P4SMA51CA-E3/5A is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body electronics, telecom line cards, and consumer appliance motor drives requiring stable component supply, RoHS-compliant sourcing, and long-term lifecycle support.
Supply support for P4SMA51CA-E3/5A 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, TVS devices, and optoelectronics with emphasis on reliability, power efficiency, and automotive-grade qualification.
The P4SMA Series targets cost-effective, high-volume transient protection for consumer, industrial, and automotive applications - optimized for automated SMT assembly, UL recognition, and AEC-Q101 compliance in compact SMA packages.
FAQ
What is the clamping voltage of P4SMA51CA-E3/5A at its rated peak pulse current?
The P4SMA51CA-E3/5A has a maximum clamping voltage (VC) of 70.1 V at 5.7 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per Figure 1 in Vishay document 88367 and defines the upper voltage limit imposed on protected circuitry during surge events. The P4SMA51CA-E3/5A maintains this clamping performance across its full operating temperature range of –65 °C to +150 °C.
Is P4SMA51CA-E3/5A suitable for automotive applications?
The base P4SMA51CA-E3/5A is RoHS-compliant and commercial-grade; however, Vishay offers AEC-Q101 qualified versions under ordering codes P4SMA51CAHE3_A or P4SMA51CAHM3_A. These variants undergo extended reliability testing including HTOL, TC, and UHAST, and are approved for use in automotive body electronics and infotainment systems. The P4SMA51CA-E3/5A itself is not AEC-Q101 qualified unless ordered with HE3/HM3 suffixes.
What does the "CA" suffix indicate in P4SMA51CA-E3/5A?
The "CA" suffix in P4SMA51CA-E3/5A denotes a bidirectional configuration - meaning the device functions identically in both forward and reverse directions, with symmetric breakdown and clamping characteristics. This eliminates polarity concerns during placement and makes it ideal for protecting AC signals, differential buses (e.g., RS-485), and ungrounded power rails. Unidirectional variants use "A" suffix only (e.g., P4SMA51A).
What is the thermal resistance of P4SMA51CA-E3/5A, and how does it affect layout?
The P4SMA51CA-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under repetitive surges, designers must provide adequate copper area and thermal vias - reducing RθJA by up to 40% with 4–6 thermal vias per pad. The P4SMA51CA-E3/5A's RθJA directly impacts maximum allowable average power dissipation in continuous operation.
Does P4SMA51CA-E3/5A meet any safety certifications?
Yes, the P4SMA51CA-E3/5A is Underwriters Laboratories (UL) recognized under file E136766 for protector classification per UL 497B, covering both unidirectional and bidirectional configurations. This certification validates its suitability in telecom, data, and signal-line surge protection applications requiring third-party safety approval. The P4SMA51CA-E3/5A also meets IEC 61000-4-2 (ESD) and IEC 61000-4-5 (surge) immunity test levels when properly applied in circuit design.
P4SMA51CA-E3/5A 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-E3/5A FAQ
1.How can I place an order for P4SMA51CA-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA51CA-E3/5A 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-E3/5A reliable?
The price and inventory of P4SMA51CA-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA51CA-E3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA51CA-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA51CA-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA51CA-E3/5A?
P4SMA51CA-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA51CA-E3/5A 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-E3/5A?
For technical support, including P4SMA51CA-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA51CA-E3/5A requirements.
6.How does Aetrix verify that P4SMA51CA-E3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA51CA-E3/5A 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-E3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA51CA-E3/5A?
All P4SMA51CA-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA51CA-E3/5A, 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-E3/5A part is unused and in its original packaging.
Return procedure for P4SMA51CA-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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