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Vishay General Semiconductor - Diodes Division P4SMA33AHE3_A/I
- Part No.:
- P4SMA33AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA33AHE3_A/I.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:11,398
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Product details
Overview
P4SMA33AHE3_A/I 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 33 V breakdown voltage (VBR = 31.4–34.7 V at 1 mA), 28.2 V stand-off voltage (VWM), 45.7 V maximum clamping voltage (VC) at 8.8 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for protecting automotive-grade sensor interfaces and industrial I/O circuits.
For engineers reviewing the P4SMA33AHE3_A/I datasheet, P4SMA33AHE3_A/I pinout, P4SMA33AHE3_A/I application, or P4SMA33AHE3_A/I equivalent, this device delivers AEC-Q101 qualification, low incremental surge resistance, fast response time, and MSL Level 1 moisture sensitivity - critical for high-reliability automotive electronics, industrial control modules, and telecom infrastructure designs requiring robust ESD and lightning surge immunity.
Technical Context
The P4SMA33AHE3_A/I operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its specified breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 µA at VWM), while thermal resistance (RθJA = 120 °C/W) supports operation up to +150 °C junction temperature under defined PCB pad layout.
It complies with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive surge) immunity requirements when applied with proper trace routing and grounding. The device's 0.098 %/°C VBR temperature coefficient enables predictable clamping behavior across automotive ambient ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V at 1 mA - defines precise clamping onset window for overvoltage protection |
| VWM | 28.2 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 45.7 V at 8.8 A - peak clamped voltage during 10/1000 µs transient, limiting downstream IC stress |
| PPPM | 400 W - peak pulse power handling capability with 0.01% duty cycle, enabling repeated surge absorption |
| IFSM | 40 A - 8.3 ms half-sine surge current rating, supporting inductive load switching events |
| TJ max | +150 °C - junction temperature limit compatible with under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive 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; meets UL 94 V-0 flammability rating and J-STD-002 solderability standards. Cathode indicated by band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential rail in unidirectional TVS configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., CAN_H, 12 V supply, sensor output); conducts during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| 400 W peak pulse power (10/1000 µs) | Withstands repetitive surges typical of ISO 7637-2 Pulse 1/2a/5a without degradation |
| Glass-passivated junction | Ensures stable VBR and low leakage over lifetime and temperature extremes |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT assembly processes without pre-baking |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage exposure to protected ICs compared to higher-ratio suppressors |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting analog outputs of pressure/temperature sensors in engine bay environments exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output and microcontroller ADC input to clamp transients before signal conditioning stage. Use Value: Limits voltage to ≤45.7 V during 100 V/50 ms load dump events, preserving 12-bit ADC accuracy and preventing latch-up. |
Use Scenario: Safeguarding RS-485 transceiver data lines in factory automation PLCs subject to EFT bursts and ground loop surges. IC Role / Device Role / Timing Role: TVS connected across differential pair (A/B) and referenced to local ground plane to absorb common-mode transients. Use Value: Clamps 4 kV EFT pulses within 1 ns, maintaining signal integrity and preventing transceiver damage per IEC 61000-4-4 Level 4. |
| Telecom Power Rail | Consumer USB Port |
Use Scenario: Secondary overvoltage protection on +48 V DC telecom power distribution boards upstream of DC-DC converters. IC Role / Device Role / Timing Role: Standoff-rated TVS placed after primary fuse and before bulk capacitor to handle sustained overvoltage from rectifier faults. Use Value: Withstands 28.2 V continuous operation while clamping 60 V surges to 45.7 V, avoiding false triggering of upstream OVP circuits. |
Use Scenario: ESD protection on USB 2.0 VBUS and D+/D− lines in portable medical monitors with touch interface. IC Role / Device Role / Timing Role: Discrete TVS array configured with P4SMA33AHE3_A/I on VBUS and bidirectional variants on data lines. Use Value: Passes IEC 61000-4-2 ±15 kV contact discharge without parameter shift, ensuring USB enumeration reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-E3/5A | Same SMA package, identical VBR (31.4–34.7 V), but rated for 400 W with 10/1000 µs waveform and not AEC-Q101 qualified | Lacks automotive qualification; suitable for commercial/industrial use only | Select when AEC-Q101 is not required and cost optimization is prioritized |
| 1.5SMC33A | Higher-power SMC package (1500 W), same VBR range, but larger footprint (7.11 × 6.22 mm vs. SMA's 4.5 × 2.79 mm) | Used where higher surge energy absorption is needed, e.g., front-end AC/DC inputs | Choose when board space allows and 1500 W pulse rating is necessary for harsher surge profiles |
Compared with SMAJ33A-E3/5A, P4SMA33AHE3_A/I adds AEC-Q101 validation for automotive deployment; versus 1.5SMC33A, it trades surge capacity for compact size and lower parasitic inductance - making it optimal for space-constrained, high-frequency signal line protection.
Availability
P4SMA33AHE3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom infrastructure requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4SMA33AHE3_A/I 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 and performance.
The P4SMA Series targets high-reliability transient suppression in automotive, industrial, and telecom applications - engineered for robustness under surge, ESD, and thermal stress with standardized AEC-Q101 qualification paths.
FAQ
What is the clamping voltage of P4SMA33AHE3_A/I at its rated peak pulse current?
The P4SMA33AHE3_A/I has a maximum clamping voltage (VC) of 45.7 V at its rated peak pulse current (IPPM) of 8.8 A, measured using the standard 10/1000 µs double-exponential waveform. This value ensures protected circuitry remains below critical voltage thresholds during transient events. The clamping performance is guaranteed across the full operating temperature range from −65 °C to +150 °C.
Is P4SMA33AHE3_A/I suitable for automotive applications?
Yes, P4SMA33AHE3_A/I is AEC-Q101 qualified and specifically designed for automotive use. Its qualification covers temperature cycling, highly accelerated life testing (HALT), and ESD robustness per JESD22-A114. The "HE3" suffix denotes RoHS-compliant and AEC-Q101 qualified construction, making P4SMA33AHE3_A/I appropriate for engine control modules, body electronics, and ADAS sensor interfaces.
What is the standoff voltage (VWM) of P4SMA33AHE3_A/I, and why does it matter?
The standoff voltage (VWM) of P4SMA33AHE3_A/I is 28.2 V - the maximum DC or continuous reverse voltage the device can withstand without exceeding 1 µA leakage current. This parameter ensures the TVS remains non-conductive during normal operation while allowing sufficient margin below the 33 V nominal system rail, preventing false triggering and minimizing power loss in always-on circuits.
How does the thermal resistance of P4SMA33AHE3_A/I affect PCB layout?
P4SMA33AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W, measured on 0.2″ × 0.2″ (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under repeated surge conditions, PCB layout must replicate this minimum pad area and avoid excessive trace length or isolation. Thermal vias under pads further reduce RθJA and improve reliability in high-duty-cycle applications.
What packaging and reel options are available for P4SMA33AHE3_A/I?
P4SMA33AHE3_A/I is supplied in 13″ diameter plastic tape and reel format (I-type carrier), with 7500 units per reel. The "I" suffix in the part number explicitly denotes this packaging configuration. It uses 8 mm tape width, EIA-481 compliant embossed carrier tape, and meets moisture sensitivity level (MSL) 1 - allowing direct placement without baking prior to reflow soldering.
P4SMA33AHE3_A/I 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:
- -
- 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_A/I FAQ
1.How can I place an order for P4SMA33AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA33AHE3_A/I 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_A/I reliable?
The price and inventory of P4SMA33AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA33AHE3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA33AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA33AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA33AHE3_A/I?
P4SMA33AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA33AHE3_A/I 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_A/I?
For technical support, including P4SMA33AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA33AHE3_A/I requirements.
6.How does Aetrix verify that P4SMA33AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA33AHE3_A/I 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_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA33AHE3_A/I?
All P4SMA33AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA33AHE3_A/I, 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_A/I part is unused and in its original packaging.
Return procedure for P4SMA33AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA33AHE3_A/I Tags
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