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Vishay General Semiconductor - Diodes Division P4SMA33A-E3/61
- Part No.:
- P4SMA33A-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA33A-E3/61.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,042
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Product details
Overview
P4SMA33A-E3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 33 V breakdown voltage (VBR = 31.4–34.7 V at 1 mA), 28.2 V maximum standoff voltage (VWM), 45.7 V clamping voltage (VC) at 8.8 A peak pulse current, and 400 W peak pulse power rating with a 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the P4SMA33A-E3/61 datasheet, P4SMA33A-E3/61 pinout, P4SMA33A-E3/61 application, or P4SMA33A-E3/61 equivalent, this device delivers verified AEC-Q101 qualification, low incremental surge resistance, fast sub-nanosecond response time, and MSL Level 1 moisture sensitivity - critical for high-reliability board-level ESD and surge immunity design.
Technical Context
The P4SMA33A-E3/61 operates as a unidirectional clamping TVS diode, leveraging a glass-passivated silicon junction to achieve stable reverse breakdown behavior under transient stress. Its 28.2 V standoff voltage ensures compatibility with 24 V nominal systems while maintaining low leakage (<1 µA at VWM), and its 45.7 V clamping voltage limits downstream voltage excursion during 8.8 A surges.
Thermally, it exhibits RθJA = 120 °C/W and RθJL = 30 °C/W, enabling reliable operation up to TJ = 150 °C. The device is rated for 40 A non-repetitive forward surge current (8.3 ms half-sine) and dissipates 3.3 W continuously on an infinite heatsink at 50 °C ambient - validated per JEDEC JESD22-B102 and J-STD-020 standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V at IT = 1 mA - defines precise breakdown onset for predictable clamping threshold |
| VWM | 28.2 V - maximum continuous reverse operating voltage without significant leakage |
| VC @ IPPM | 45.7 V at 8.8 A - peak clamped voltage during 10/1000 µs surge, limiting stress on protected ICs |
| PPPM | 400 W - peak pulse power handling capability under standard lightning/surge test waveform |
| IPPM | 8.8 A - maximum non-repetitive surge current the device safely clamps without failure |
| TJ max. | 150 °C - maximum junction temperature supporting operation in under-hood automotive and industrial enclosures |
| Package | SMA (DO-214AC) - industry-standard SMD outline with 5.0 mm × 5.0 mm copper pad thermal requirement |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD22-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 of protected circuit (e.g., GND or return path) |
| Cathode | Reverse-biased clamping terminal | Connected to higher-potential line (e.g., 24 V rail or signal trace) to enable avalanche clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| 400 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 Level 4 surge events without degradation |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes voltage overshoot during transients, reducing risk to downstream logic and analog circuits |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT assembly processes without prebaking |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter stability under thermal/humidity stress |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between signal line and ground, responding within <1 ns to limit voltage excursions. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-4 EFT bursts while meeting AEC-Q101 requirements. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers against field-wiring induced surges and relay contact bounce. IC Role / Device Role / Timing Role: Standoff-mode TVS on each input channel, conducting only during overvoltage events to shunt energy to chassis ground. Use Value: Enables >100,000 actuation cycles without parameter drift, with VC = 45.7 V ensuring microcontroller GPIO remains below absolute maximum ratings. |
| Telecom Line Interface | Consumer Power Adapter Output |
Use Scenario: Secondary-side transient suppression on Ethernet PHY power rails and RS-485 termination networks exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Fast-clamping unidirectional TVS placed across VCC and GND near PHY IC, activated before internal ESD structures fail. Use Value: Clamps 400 W surges to ≤45.7 V within nanoseconds, preventing latch-up and permanent damage to 3.3 V/5 V interface ICs. |
Use Scenario: Output rail protection in wall-mounted AC/DC adapters for smart home devices, guarding against output short-circuit recovery spikes and capacitor discharge transients. IC Role / Device Role / Timing Role: Final-stage TVS on regulated 5 V/12 V output, absorbing energy from inductive kickback during hot-plug events. Use Value: Withstands repetitive 300 W surges above 91 V and maintains 1 µA leakage at 28.2 V, preserving no-load efficiency and standby compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A-E3/52 (Vishay) | Higher 600 W PPPM, SMB package (DO-214AA), 30% larger footprint, same VBR/VC specs | Better suited for higher-energy surges where PCB space allows larger thermal mass | Select when system-level surge tests exceed IEC 61000-4-5 Level 4 or require >400 W margin |
| 1.5SMC33A (ON Semiconductor) | Same SMA package, identical VWM/VBR/VC, but rated for 1.5 kW peak pulse power (10/1000 µs) and not AEC-Q101 qualified | Commercial-grade alternative with higher surge headroom but no automotive qualification | Choose for cost-sensitive industrial designs where AEC-Q101 is not mandated and 1.5 kW surge margin is required |
Compared with SMBJ33A-E3/52, P4SMA33A-E3/61 offers tighter board space utilization and automotive qualification; versus 1.5SMC33A, it trades peak power headroom for certified reliability in harsh environments - making it optimal for space-constrained, AEC-Q101–mandated applications.
Availability
P4SMA33A-E3/61 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface boards requiring stable component supply, RoHS-compliant sourcing, and AEC-Q101 assurance.
Supply support for P4SMA33A-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, precision, and high-power handling.
The P4SMA Series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for board-level transient suppression in automotive, industrial, and communications equipment where fast response, stable clamping, and qualification-grade consistency are mandatory.
FAQ
What is the clamping voltage of P4SMA33A-E3/61 and how is it measured?
The P4SMA33A-E3/61 has a maximum clamping voltage (VC) of 45.7 V, measured at a peak pulse current (IPPM) of 8.8 A using a standardized 10/1000 µs double-exponential waveform. This value reflects the actual voltage seen across the device terminals during surge conduction and is critical for ensuring protected ICs remain within their absolute maximum ratings. The P4SMA33A-E3/61 achieves this clamping performance while maintaining low incremental resistance and minimal overshoot.
Is P4SMA33A-E3/61 suitable for automotive applications?
Yes, P4SMA33A-E3/61 is AEC-Q101 qualified and explicitly listed in Vishay's automotive-grade ordering codes (HE3/HM3 variants). It undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD verification per JESD22-A114. The P4SMA33A-E3/61 is routinely deployed in engine control units, body electronics, and ADAS sensor modules where transient immunity and long-term reliability are essential.
What is the standoff voltage rating of P4SMA33A-E3/61 and why does it matter?
The P4SMA33A-E3/61 has a maximum working standoff voltage (VWM) of 28.2 V - the highest DC or RMS voltage that can be continuously applied without triggering conduction. This value is deliberately set below the 33 V nominal breakdown to ensure stable operation under normal conditions while allowing margin for ripple and tolerance. For a 24 V system, the P4SMA33A-E3/61 provides ideal headroom: it remains fully blocking during steady-state operation yet activates rapidly during transients exceeding ~31.4 V.
How does the SMA package of P4SMA33A-E3/61 affect thermal performance?
The SMA (DO-214AC) package of P4SMA33A-E3/61 delivers RθJA = 120 °C/W under standard JEDEC test conditions (0.2" × 0.2" copper pads), enabling effective heat dissipation in compact layouts. Its low RθJL = 30 °C/W supports efficient conduction to PCB copper, especially when used with thermal vias or internal ground planes. The P4SMA33A-E3/61's thermal design allows sustained 3.3 W power dissipation at 50 °C ambient - critical for high-density industrial and automotive PCBs where airflow is limited.
Can P4SMA33A-E3/61 be used in bidirectional configurations?
No, P4SMA33A-E3/61 is a unidirectional TVS diode, identifiable by its cathode band marking and specified electrical parameters (VBR, VWM, VC) for reverse-biased operation only. Bidirectional functionality requires the CA suffix (e.g., P4SMA33CA). Using P4SMA33A-E3/61 in a bidirectional circuit would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit. Always verify polarity alignment when placing the P4SMA33A-E3/61 on PCBs.
P4SMA33A-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:
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA33A-E3/61 FAQ
1.How can I place an order for P4SMA33A-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA33A-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 P4SMA33A-E3/61 reliable?
The price and inventory of P4SMA33A-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 P4SMA33A-E3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA33A-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA33A-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA33A-E3/61?
P4SMA33A-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA33A-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 P4SMA33A-E3/61?
For technical support, including P4SMA33A-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA33A-E3/61 requirements.
6.How does Aetrix verify that P4SMA33A-E3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA33A-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 P4SMA33A-E3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA33A-E3/61?
All P4SMA33A-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA33A-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 P4SMA33A-E3/61 part is unused and in its original packaging.
Return procedure for P4SMA33A-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA33A-E3/61 Tags
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