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Vishay General Semiconductor - Diodes Division P4SMA51AHE3/61
- Part No.:
- P4SMA51AHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA51AHE3/61.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA51AHE3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in 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 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and automotive electronics.
For engineers reviewing the P4SMA51AHE3/61 datasheet, P4SMA51AHE3/61 pinout, P4SMA51AHE3/61 application, or P4SMA51AHE3/61 equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a voltage-clamping protection device that enters avalanche conduction when transient voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and fast response time (<1 ns), enabling effective suppression of ESD, lightning-induced surges, and inductive switching spikes.
The device is rated for 400 W peak pulse power (10/1000 µs) up to 91 V, derating to 300 W above that; it supports 40 A non-repetitive forward surge current (8.3 ms half-sine) and exhibits 0.102 %/°C temperature coefficient of VBR, ensuring predictable clamping behavior across -65 °C to +150 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43.6 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (min/max) | 48.5 V / 53.6 V at IT = 1 mA - Tight breakdown window ensures reliable turn-on without premature conduction during normal operation. |
| VC @ IPPM | 70.1 V at 5.7 A - Clamping voltage under full-rated 10/1000 µs surge; determines maximum stress imposed on protected downstream circuitry. |
| PPPM | 400 W - Peak pulse power handling capability with standardized 10/1000 µs waveform; validates robustness against common transient threats. |
| IFSM | 40 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports survival during high-energy inrush or fault events. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive and high-ambient industrial environments. |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive-grade reliability including temperature cycling, HTRB, and ESD. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads; meets UL 94 V-0 flammability rating and J-STD-002 solderability standards. Cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower-potential side of protected line. | Provides path for surge current to ground when cathode is held at higher potential; must be routed with low-inductance trace. |
| Cathode | Current exit terminal in forward bias; marked with band; connected to higher-potential side or VCC. | Defines clamping reference point; ties to rail being protected (e.g., 48 V supply or CAN-H line); determines unidirectional polarity. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV line-to-ground) without derating in typical PCB layouts. |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage current over temperature and lifetime; eliminates risk of junction corrosion in humid environments. |
| AEC-Q101 qualified (HE3 suffix) | Validates suitability for automotive powertrain, body control, and ADAS modules requiring zero-defect reliability and extended temperature operation. |
| MSL Level 1 (260 °C peak reflow) | Supports single-pass lead-free reflow assembly without moisture-related popcorning or delamination. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns response), reducing voltage stress on sensitive CMOS inputs. |
Applications
| Automotive Power Supply Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 48 V battery-supplied ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND to clamp surges up to ±120 V. Use Value: Withstands 400 W pulses and maintains VC ≤ 70.1 V, preventing damage to downstream DC/DC controllers and microcontrollers. |
Use Scenario: Shielding analog output lines of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: TVS mounted at connector interface to suppress ESD (IEC 61000-4-2 ±8 kV) and cable discharge events. Use Value: Sub-1 ns response and 0.1 µA leakage at 43.6 V preserve signal integrity and measurement accuracy in 24-bit ADC front-ends. |
| Telecom DC Power Feeding | Consumer USB-C Port Protection |
Use Scenario: Safeguarding PoE-powered equipment (e.g., IP cameras) from induced surges on 48 V DC feed lines. IC Role / Device Role / Timing Role: Unidirectional TVS on input rail upstream of primary DC/DC converter. Use Value: 43.6 V VWM provides 10% margin above nominal 48 V, while 70.1 V VC stays below 80 V absolute maximum ratings of most PMICs. |
Use Scenario: Adding secondary-level surge immunity to USB-C VBUS lines in portable docking stations. IC Role / Device Role / Timing Role: TVS placed between VBUS and chassis ground to absorb hot-plug transients and ESD. Use Value: SMA package allows compact layout near connector; AEC-Q101 qualification ensures robustness across consumer product lifecycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51A-E3/5A | Same VWM/VBR/VC specs but rated for 400 W only up to 91 V; no AEC-Q101 qualification; MSL Level 1, same SMA package. | Targeted at commercial/industrial designs where automotive qualification is not required; lower cost, broader distribution. | Select SMAJ51A-E3/5A if AEC-Q101 is unnecessary and volume pricing or lead time favors this variant. |
| 1.5SMC51A | Higher package thermal resistance (RθJA ≈ 150 °C/W vs. 120 °C/W); identical electrical specs; DO-214AB (SMC) package, 2.5 mm wider than SMA. | Requires larger PCB footprint; better suited for high-power dissipation scenarios with heatsinking; less ideal for dense automotive modules. | Choose 1.5SMC51A only when board space permits larger SMC package and thermal design accommodates higher RθJA. |
Compared with SMAJ51A-E3/5A, P4SMA51AHE3/61 adds AEC-Q101 qualification and tighter VBR tolerance, making it preferable for automotive systems; versus 1.5SMC51A, its smaller SMA footprint and lower RθJA support miniaturized, thermally constrained layouts without sacrificing surge rating.
Availability
P4SMA51AHE3/61 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and telecom DC feeding applications requiring stable component supply, AEC-Q101 compliance, and consistent surge performance across production batches.
Supply support for P4SMA51AHE3/61 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series was developed to deliver high-power, low-profile TVS protection for automotive and industrial systems where space, thermal performance, and qualification rigor are critical - especially for 12 V, 24 V, and 48 V power domains.
FAQ
What is the maximum clamping voltage of P4SMA51AHE3/61 under a 10/1000 µs surge?
The P4SMA51AHE3/61 has a maximum clamping voltage (VC) of 70.1 V at 5.7 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per standard test conditions and defines the upper voltage limit imposed on protected circuitry during a full-rated transient event. The P4SMA51AHE3/61 maintains this clamping performance across its specified operating temperature range.
Is P4SMA51AHE3/61 suitable for automotive applications?
Yes, P4SMA51AHE3/61 is AEC-Q101 qualified and specifically designed for automotive use, including engine control units, body electronics, and ADAS modules. Its HE3 suffix denotes RoHS-compliant construction with automotive-grade reliability testing, and it operates from -65 °C to +150 °C - meeting under-hood thermal requirements. The P4SMA51AHE3/61 also complies with MSL Level 1 for lead-free reflow.
What does the "HE3" suffix indicate in P4SMA51AHE3/61?
The "HE3" suffix in P4SMA51AHE3/61 indicates RoHS-compliant construction and AEC-Q101 qualification. It distinguishes this automotive-grade variant from commercial versions (e.g., E3 or M3), confirming compliance with stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD. The "61" denotes 7" tape-and-reel packaging with 1800 units per reel. The P4SMA51AHE3/61 is not interchangeable with non-HE3 variants in automotive designs without requalification.
How does P4SMA51AHE3/61 differ from bidirectional TVS diodes like P4SMA51CA?
P4SMA51AHE3/61 is unidirectional and intended for DC line protection where polarity is fixed (e.g., VCC-to-GND), offering lower leakage and sharper clamping in one direction. In contrast, P4SMA51CA is bidirectional and used for AC or differential signal lines (e.g., RS-485, CAN) where surges may occur in either polarity. The P4SMA51AHE3/61 has a cathode band marking; P4SMA51CA has no polarity marking and symmetrical VBR in both directions.
What is the thermal resistance of P4SMA51AHE3/61, and how does it affect layout?
The P4SMA51AHE3/61 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. This value assumes minimum recommended pad layout per Vishay's datasheet; reducing pad size increases RθJA and risks thermal runaway during repetitive surges. For optimal performance, maintain full copper pour under both terminals and avoid narrow traces. The P4SMA51AHE3/61's RθJL is 30 °C/W, supporting efficient heat transfer to PCB planes.
P4SMA51AHE3/61 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:
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA51AHE3/61 FAQ
1.How can I place an order for P4SMA51AHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA51AHE3/61 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 P4SMA51AHE3/61 reliable?
The price and inventory of P4SMA51AHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA51AHE3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA51AHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA51AHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA51AHE3/61?
P4SMA51AHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA51AHE3/61 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 P4SMA51AHE3/61?
For technical support, including P4SMA51AHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA51AHE3/61 requirements.
6.How does Aetrix verify that P4SMA51AHE3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA51AHE3/61 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 P4SMA51AHE3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA51AHE3/61?
All P4SMA51AHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA51AHE3/61, 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 P4SMA51AHE3/61 part is unused and in its original packaging.
Return procedure for P4SMA51AHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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