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Vishay General Semiconductor - Diodes Division P4SMA51AHE3/5A
- Part No.:
- P4SMA51AHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA51AHE3/5A.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,580
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Product details
Overview
P4SMA51AHE3/5A from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping fast-rising ESD and surge 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 - suitable for protecting automotive-grade MOSFETs and sensor interfaces against load dump and inductive switching events.
For engineers reviewing the P4SMA51AHE3/5A datasheet, P4SMA51AHE3/5A pinout, P4SMA51AHE3/5A application, or P4SMA51AHE3/5A equivalent, this device delivers AEC-Q101 qualification, low incremental surge resistance, <1 ns response time, and MSL Level 1 moisture sensitivity - critical for high-reliability automotive and industrial PCB designs requiring robust overvoltage immunity without layout redesign.
Technical Context
The P4SMA51AHE3/5A operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its specified VBR range (48.5–53.6 V), with cathode band marking polarity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at VWM), while thermal resistance (RθJA = 120 °C/W) supports operation up to 150 °C junction temperature under defined pad layout conditions.
It meets UL 497B recognition (QVGQ2) and is rated for 400 W peak pulse power (10/1000 µs) at 25 °C, derating linearly above TA = 25 °C per Figure 2; repetitive duty cycle limited to 0.01 %, with 300 W rating applicable above 91 V devices - though P4SMA51AHE3/5A remains at full 400 W due to its 51 V nominal rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43.6 V - Maximum continuous reverse operating voltage before conduction begins; sets safe margin below system rail for reliable standby isolation. |
| VBR @ IT = 1 mA | 48.5–53.6 V - Measured breakdown threshold defining turn-on precision; tight 5.1 V window enables predictable clamping onset. |
| VC @ IPPM = 5.7 A | 70.1 V - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to ≤70.1 V even under 5.7 A transient. |
| PPPM | 400 W - Peak pulse power handling capability; sustains single 10/1000 µs surges up to 400 W without failure under standard mounting. |
| IFSM | 40 A - Non-repetitive forward surge current rating (8.3 ms half-sine); validates robustness against accidental forward polarity faults. |
| TJmax | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments and thermally constrained enclosures. |
| Package | SMA (DO-214AC) - Standardized SMT outline with 5.0 mm × 5.0 mm copper pads per terminal; compatible with automated pick-and-place and reflow. |
Pinout & Package
SMA (DO-214AC) surface-mount package with molded epoxy body, matte tin-plated leads, and cathode band marking on the unidirectional P4SMA51AHE3/5A. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H), lead pitch 2.54 mm, compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to lower-potential side of protected line; defines conduction direction in unidirectional configuration. |
| Cathode | Avalanche conduction terminal / Clamping output node | Marked by band; ties to higher-potential rail or signal line to be clamped; sinks surge current to ground or return path. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces per stress test requirements. |
| 400 W peak pulse power (10/1000 µs) | Withstands ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 3 surges without degradation when mounted per spec. |
| Low clamping ratio (VC/VBR ≈ 1.36) | Minimizes overvoltage overshoot during transients - critical for safeguarding 48 V automotive electronics and 3.3/5 V logic rails. |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without baking; eliminates moisture-related popcorning risk in high-volume manufacturing. |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage performance across temperature and lifetime, reducing field failure risk. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump (ISO 16750-2) and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges >60 V within nanoseconds. Use Value: Limits rail voltage to ≤70.1 V during 400 W transients, preventing damage to MCU power supplies and CAN transceivers. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in factory automation systems from ESD and cable discharge. IC Role / Device Role / Timing Role: Low-capacitance TVS on 0–5 V or 4–20 mA signal lines to absorb ±8 kV contact ESD per IEC 61000-4-2. Use Value: Maintains signal integrity with <1 µA leakage at 43.6 V, enabling accurate sub-mV measurement without offset drift. |
| Telecom DC Power Input Protection | Consumer Device USB Port Protection |
|
Use Scenario: Safeguarding PoE-powered switches and base stations against lightning-induced surges on 48 V DC input. IC Role / Device Role / Timing Role: Primary clamping device upstream of DC-DC converters, absorbing energy before regulation stage. Use Value: Handles 5.7 A peak pulse current at 70.1 V clamping, meeting Telcordia GR-1089-CORE Level 3 surge immunity. |
Use Scenario: Adding secondary overvoltage protection on USB VBUS lines in portable speakers and smart home hubs. IC Role / Device Role / Timing Role: Back-to-back placement with bidirectional TVS or standalone unidirectional clamp on 5 V supply path. Use Value: Fast <1 ns response prevents latch-up in USB controllers during hot-plug ESD events, validated per USB-IF compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51A | Same VWM (43.6 V), identical VBR and VC, but SMB package (DO-214AA) - 1.6 mm taller, 0.5 mm wider than SMA. | Higher thermal mass supports marginally better power dissipation; requires PCB footprint revision due to larger body and lead spacing. | Select SMBJ51A only if board space allows larger footprint and enhanced thermal margin is prioritized over miniaturization. |
| 1.5SMC51A | Same electrical specs, but SMC (DO-214AB) package - 7.1 mm × 6.2 mm body, 2.54 mm lead pitch, RθJA = 100 °C/W. | Superior 1.5 kW peak power rating enables use in higher-energy surge environments (e.g., AC mains input stages), not automotive signal lines. | Choose 1.5SMC51A for industrial AC/DC front-end protection where footprint and height constraints are relaxed and 1.5 kW rating is required. |
Compared with SMBJ51A and 1.5SMC51A, the P4SMA51AHE3/5A offers optimal balance of AEC-Q101 qualification, compact SMA footprint, and 400 W capability - making it the preferred choice for space-constrained automotive and embedded designs where reliability and manufacturability are co-prioritized.
Availability
P4SMA51AHE3/5A is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor modules, and telecom power supplies requiring stable component supply, AEC-Q101 compliance, and RoHS-compliant packaging in 13" tape-and-reel format (7500 pcs/reel).
Supply support for P4SMA51AHE3/5A 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series is engineered for high-speed transient suppression in automotive, industrial, and communications systems - delivering consistent clamping performance, AEC-Q101 validation, and standardized SMT packaging for scalable manufacturing.
FAQ
What is the clamping voltage of P4SMA51AHE3/5A at its rated peak pulse current?
The P4SMA51AHE3/5A 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 and Table on page 2 of Vishay document 88367, confirming its ability to limit transient overvoltage to ≤70.1 V during standardized surge events - a key parameter for ensuring downstream IC survival in 48 V automotive and industrial systems.
Is P4SMA51AHE3/5A suitable for bidirectional transient protection?
No, P4SMA51AHE3/5A is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay specifies part numbers ending in "CA" (e.g., P4SMA51CA). Using P4SMA51AHE3/5A in reverse-biased configurations risks forward conduction and failure; always verify polarity alignment in circuit design.
Does P4SMA51AHE3/5A meet automotive qualification standards?
Yes, P4SMA51AHE3/5A carries the HE3 suffix denoting AEC-Q101 qualification per Vishay's ordering nomenclature and documentation. It is explicitly listed in the "AEC-Q101 qualified" section of the P4SMA datasheet (Rev. 09-Jan-2024), validating its suitability for automotive applications including engine control, body electronics, and ADAS subsystems.
What is the maximum operating temperature for P4SMA51AHE3/5A?
The P4SMA51AHE3/5A has a maximum junction temperature (TJmax) of +150 °C, as specified in the "Maximum Ratings" table on page 1 of Vishay document 88367. This rating applies under defined thermal conditions - including use of 5.0 mm × 5.0 mm copper pads per terminal - and supports deployment in under-hood automotive environments and high-ambient industrial settings.
How does the HE3/5A suffix affect packaging and compliance for P4SMA51AHE3/5A?
The "HE3" suffix indicates RoHS-compliant construction with AEC-Q101 qualification, while "/5A" denotes 13-inch tape-and-reel packaging containing 7500 units per reel. This configuration satisfies automotive PPAP requirements and enables high-speed SMT assembly without baking, as confirmed by MSL Level 1 rating and J-STD-020 compliance stated in the mechanical data section.
P4SMA51AHE3/5A 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:
- 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)
P4SMA51AHE3/5A FAQ
1.How can I place an order for P4SMA51AHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA51AHE3/5A 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 P4SMA51AHE3/5A reliable?
The price and inventory of P4SMA51AHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA51AHE3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA51AHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA51AHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA51AHE3/5A?
P4SMA51AHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA51AHE3/5A 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 P4SMA51AHE3/5A?
For technical support, including P4SMA51AHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA51AHE3/5A requirements.
6.How does Aetrix verify that P4SMA51AHE3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA51AHE3/5A 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 P4SMA51AHE3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA51AHE3/5A?
All P4SMA51AHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA51AHE3/5A, 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 P4SMA51AHE3/5A part is unused and in its original packaging.
Return procedure for P4SMA51AHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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