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Vishay General Semiconductor - Diodes Division P4SMA33AHE3/61
- Part No.:
- P4SMA33AHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA33AHE3/61.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,056
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Product details
Overview
P4SMA33AHE3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P4SMA series, designed for clamping voltage transients on power and signal lines. It features a 33 V breakdown voltage (VBR = 31.4–34.7 V at 1 mA), 400 W peak pulse power (10/1000 µs), 45.7 V maximum clamping voltage at 8.8 A, and AEC-Q101 qualification for automotive use - deployed in engine control units, infotainment power rails, and sensor interface protection.
For engineers reviewing the P4SMA33AHE3/61 datasheet, P4SMA33AHE3/61 pinout, P4SMA33AHE3/61 application, or P4SMA33AHE3/61 equivalent, key selection criteria include unidirectional polarity, SMA (DO-214AC) package compatibility, 28.2 V stand-off voltage, <1 µA reverse leakage at VWM, and thermal resistance of 120 °C/W junction-to-ambient - critical for high-reliability automotive and industrial surge protection designs.
Technical Context
This device operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its specified breakdown range (31.4–34.7 V). Its glass-passivated junction ensures stable clamping performance and fast response time (<1 ns), enabling effective suppression of ESD, lightning-induced surges, and inductive switching transients.
The P4SMA33AHE3/61 delivers 400 W peak pulse power under standardized 10/1000 µs waveform conditions with 0.01% duty cycle, derated above 25 °C per Fig. 2. It supports 40 A non-repetitive forward surge current (8.3 ms half-sine) and maintains operation across –65 °C to +150 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V at 1 mA - defines precise avalanche initiation threshold for reliable overvoltage detection |
| VWM | 28.2 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | 45.7 V at 8.8 A - clamped voltage during 400 W transient, limiting downstream IC stress |
| IPPM | 8.8 A - peak pulse current capability under 10/1000 µs waveform, defining surge handling capacity |
| PPPM | 400 W - peak pulse power rating, specifying transient energy absorption without failure |
| RθJA | 120 °C/W - thermal resistance from junction to ambient, guiding PCB copper pad sizing for thermal management |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS configuration |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 24 V rail or CAN bus); conducts during overvoltage to clamp voltage |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a transients in 12 V/24 V automotive systems |
| AEC-Q101 qualified | Meets automotive reliability requirements for under-hood and cabin electronics without additional qualification effort |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter stability under thermal cycling and humidity stress |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns or baking requirements |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients, improving protection margin for sensitive ICs |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply inputs in engine control modules (ECMs) from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp transients above 28.2 V. Use Value: Limits clamped voltage to 45.7 V during 400 W surges, preventing damage to downstream DC-DC converters and microcontrollers. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to absorb ESD and cable discharge events before reaching signal conditioning circuitry. Use Value: Sub-1 ns response and <1 µA leakage at 28.2 V preserve signal integrity while enabling fail-safe operation in noisy industrial environments. |
| Telecom Power Input Protection | Consumer Device USB Port Protection |
Use Scenario: Safeguarding AC/DC adapter input stages in PoE-powered network switches against lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on 48 V input rail, coordinated with upstream fuses and secondary-stage suppressors. Use Value: 400 W rating and 120 °C/W RθJA allow sustained surge handling without thermal runaway on standard FR4 PCB layouts. |
Use Scenario: Adding overvoltage resilience to USB-C power delivery paths in portable media players and docking stations. IC Role / Device Role / Timing Role: Unidirectional TVS on VBUS line to suppress hot-plug transients and charger-induced spikes. Use Value: AEC-Q101 qualification ensures consistent performance across temperature extremes encountered in consumer handheld devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-E3/61 | Same SMA package, identical VBR (31.4–34.7 V), but rated for 400 W at 25 °C only (no AEC-Q101 qualification) | Commercial/industrial use only; not approved for automotive production programs | Select when AEC-Q101 compliance is unnecessary and cost optimization is prioritized |
| 1.5SMC33A | Larger SMC (DO-214AB) package, same electrical specs, higher thermal mass (RθJA ≈ 60 °C/W), 1500 W peak power rating | Used where board space allows larger footprint and higher surge margin is required beyond 400 W | Choose for legacy designs using SMC footprints or applications demanding >400 W single-pulse capability |
Compared with SMAJ33A-E3/61, P4SMA33AHE3/61 adds automotive qualification without changing electrical behavior; versus 1.5SMC33A, it trades surge headroom and thermal performance for compactness and automated placement compatibility in space-constrained automotive ECUs.
Availability
P4SMA33AHE3/61 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom power input protection requiring stable component supply, AEC-Q101 traceability, and RoHS-compliant manufacturing.
Supply support for P4SMA33AHE3/61 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 validation.
The P4SMA series targets high-volume automotive and industrial surge protection, engineered for AEC-Q101 compliance, automated assembly, and consistent clamping performance across temperature and lifetime.
FAQ
What is the breakdown voltage tolerance of P4SMA33AHE3/61?
The P4SMA33AHE3/61 has a specified breakdown voltage range of 31.4 V to 34.7 V at 1 mA test current, representing ±5% tolerance around the nominal 33 V rating. This tight VBR window ensures predictable clamping onset in automotive and industrial circuits where overvoltage thresholds must be precisely controlled. The value is measured per ANSI/IEEE C62.35 and confirmed in the Vishay P4SMA datasheet revision 09-Jan-2024.
Is P4SMA33AHE3/61 suitable for bidirectional transient suppression?
No, P4SMA33AHE3/61 is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. It conducts only in reverse bias to clamp positive transients on a line referenced to ground. For bidirectional protection (e.g., data lines like RS-485 or CAN), the "CA" variant - such as P4SMA33CAHE3/61 - must be used. The P4SMA33AHE3/61 datasheet explicitly states polarity as unidirectional and provides no bidirectional electrical characteristics.
What is the maximum clamping voltage of P4SMA33AHE3/61 under surge conditions?
The maximum clamping voltage (VC) of P4SMA33AHE3/61 is 45.7 V at 8.8 A peak pulse current, tested with a 10/1000 µs waveform. This value defines the highest voltage seen downstream during a 400 W transient event. It is measured per JEDEC standards and remains valid up to 150 °C junction temperature, making it directly usable for worst-case design margin calculations in automotive power rail protection.
Does P4SMA33AHE3/61 require special PCB layout considerations?
Yes - P4SMA33AHE3/61 should be mounted on 0.2" x 0.2" (5.0 mm x 5.0 mm) copper pads per terminal to achieve its rated 400 W peak pulse power and 120 °C/W thermal resistance. Smaller pads reduce heat dissipation, causing premature thermal failure during repetitive surges. The SMA (DO-214AC) footprint must also maintain ≥0.76 mm conductor spacing to avoid arcing under high-voltage transients, as specified in the Vishay mechanical drawing.
How does the AEC-Q101 qualification impact P4SMA33AHE3/61 usage in automotive designs?
The AEC-Q101 qualification of P4SMA33AHE3/61 certifies it for automotive under-hood and cabin applications, covering stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD (HBM ≥ 8 kV). This eliminates need for customer requalification, accelerates PPAP submission, and ensures long-term reliability in environments with –40 °C to +125 °C ambient temperatures - a requirement not met by commercial-grade equivalents like SMAJ33A-E3/61.
P4SMA33AHE3/61 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):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 8.8A
- 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)
P4SMA33AHE3/61 FAQ
1.How can I place an order for P4SMA33AHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA33AHE3/61 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 P4SMA33AHE3/61 reliable?
The price and inventory of P4SMA33AHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA33AHE3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA33AHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA33AHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA33AHE3/61?
P4SMA33AHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA33AHE3/61 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 P4SMA33AHE3/61?
For technical support, including P4SMA33AHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA33AHE3/61 requirements.
6.How does Aetrix verify that P4SMA33AHE3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA33AHE3/61 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 P4SMA33AHE3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA33AHE3/61?
All P4SMA33AHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA33AHE3/61, 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 P4SMA33AHE3/61 part is unused and in its original packaging.
Return procedure for P4SMA33AHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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