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Vishay General Semiconductor - Diodes Division P4SMA33CA-E3/5A
- Part No.:
- P4SMA33CA-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA33CA-E3/5A.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA33CA-E3/5A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features a 33 V standoff voltage (VWM), 36.7 V minimum breakdown voltage (VBR), 45.7 V maximum clamping voltage (VC) at 8.8 A peak pulse current (IPPM), and 400 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.
For engineers reviewing the P4SMA33CA-E3/5A datasheet, P4SMA33CA-E3/5A pinout, P4SMA33CA-E3/5A application, or P4SMA33CA-E3/5A equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM ≈ 1.39), AEC-Q101 qualification eligibility (via HE3/HM3 variants), RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on standard PCB copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal lines without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the low incremental surge resistance supports fast transient response under 1 ns.
The device is rated for 150 °C maximum junction temperature and derates linearly above 25 °C ambient per Figure 2; thermal resistance is 120 °C/W junction-to-ambient (RθJA) on standard 0.2" × 0.2" copper pads. It meets MSL Level 1 per J-STD-020 and passes JESD201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 33 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for protected circuitry. |
| VBR (Breakdown Voltage) | 34.7 V min - Voltage at which device enters avalanche conduction at 1 mA test current; ensures predictable turn-on threshold. |
| VC (Clamping Voltage) | 45.7 V max at 8.8 A - Peak voltage seen by downstream circuit during 10/1000 µs transient; determines protection level for sensitive components. |
| PPPM (Peak Pulse Power) | 400 W - Maximum transient energy absorption capability with 10/1000 µs waveform; enables robust surge immunity per IEC 61000-4-5. |
| ID (Reverse Leakage) | 1.0 µA max at VWM - Low leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
| TJ max | 150 °C - Maximum junction temperature rating; supports operation in under-hood automotive and industrial environments. |
| Package | SMA (DO-214AC) - Surface-mount package with 5.0 mm × 5.0 mm pad layout; compatible with standard reflow profiles and automated pick-and-place. |
Pinout & Package
SMA (DO-214AC) package: molded plastic case with two terminals, no polarity marking for bidirectional devices; terminals are matte tin plated, solderable per J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Either terminal accepts surge current in either direction; no cathode band marking distinguishes polarity. |
| Cathode | Transient current exit (bidirectional) | Functionally identical to Anode in bidirectional configuration; device conducts symmetrically across both terminals. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC, differential, or floating signal lines without external polarity management. |
| 400 W peak pulse power (10/1000 µs) | Withstands high-energy transients such as EFT bursts and lightning-induced surges in industrial I/O interfaces. |
| Low clamping ratio (VC/VWM = 1.39) | Minimizes overvoltage stress on protected ICs compared to higher-ratio suppressors, improving system reliability. |
| AEC-Q101 qualification path | HE3/HM3 variants available for automotive applications requiring validated reliability and extended temperature operation. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow processing without baking, reducing manufacturing complexity. |
Applications
| Industrial Sensor Interface Protection | Automotive Body Control Module (BCM) Inputs |
|---|---|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) from inductive switching noise and load dump transients in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential or single-ended sensor lines to clamp ±40 V transients before they reach ADC inputs or signal conditioners. Use Value: Prevents latch-up or permanent damage to precision op-amps and microcontrollers while maintaining <1 µA leakage at 33 V nominal rail. |
Use Scenario: Safeguarding LIN bus or discrete switch inputs in BCMs exposed to battery line transients and alternator load dump events. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between input pin and ground to limit voltage excursions to ≤45.7 V during 100 V/50 ms load dump pulses. Use Value: Ensures functional safety compliance (ISO 16750-2) without adding series impedance or signal delay to control signals. |
| Telecom Line Card Surge Protection | Consumer USB Port ESD Clamping |
Use Scenario: Front-end protection for Ethernet PHYs or RS-485 transceivers in network equipment subjected to lightning-induced surges on data lines. IC Role / Device Role / Timing Role: Bidirectional TVS mounted directly at connector interface to shunt common-mode transients before entering isolation transformers or receiver stages. Use Value: Delivers 400 W surge handling with sub-1 ns response, preserving signal integrity up to 100 Mbps while meeting IEC 61000-4-5 Level 4. |
Use Scenario: Secondary-level ESD protection for USB 2.0 D+/D− lines in portable devices where primary protection resides in the controller. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <100 pF at VWM) placed adjacent to USB connector to clamp ±15 kV contact discharge per IEC 61000-4-2. Use Value: Limits clamping voltage to 45.7 V while adding negligible signal distortion - critical for maintaining eye diagram compliance at 480 Mbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | Higher PPPM (600 W), larger SMB (DO-214AA) package, same VWM/VC ratings | Better suited for higher-energy surges; requires larger PCB footprint and different pad layout | Select when surge energy exceeds 400 W but board space allows SMB footprint |
| 1.5KE33CA | Through-hole TO-218 package, 1500 W PPPM, higher VC (53 V), higher leakage (5 µA) | Designed for legacy through-hole designs or ultra-high-energy protection; not SMT-compatible | Choose only for retrofit or high-reliability through-hole assemblies where SMT is unavailable |
Compared with SMBJ33CA and 1.5KE33CA, the P4SMA33CA-E3/5A offers optimal balance of compact SMA footprint, 400 W surge rating, and low-leakage performance - making it ideal for space-constrained SMT designs requiring automotive-grade reliability paths and automated assembly compatibility.
Availability
P4SMA33CA-E3/5A is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, telecom line cards, and consumer USB port protection requiring stable component supply and RoHS-compliant sourcing.
Supply support for P4SMA33CA-E3/5A 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series is engineered for high-volume surface-mount transient suppression in automotive, industrial, and communications systems - delivering consistent clamping performance, AEC-Q101 qualification pathways, and robust surge handling in compact SMA packages.
FAQ
What is the clamping voltage of P4SMA33CA-E3/5A at its rated peak pulse current?
The P4SMA33CA-E3/5A has a maximum clamping voltage (VC) of 45.7 V at 8.8 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per Figure 1 and Table on page 2 of Vishay document 88367, and defines the upper voltage limit imposed on protected circuitry during standardized surge events.
Is P4SMA33CA-E3/5A suitable for automotive applications?
P4SMA33CA-E3/5A itself is commercial-grade (E3 suffix), but the P4SMA33CAHE3_A variant is AEC-Q101 qualified for automotive use. The P4SMA33CA-E3/5A shares identical electrical characteristics and package, allowing direct design-in with qualification path via HE3 ordering code - critical for BCM, infotainment, and ADAS subsystems.
Does P4SMA33CA-E3/5A have polarity markings on the package?
No. As a bidirectional TVS, the P4SMA33CA-E3/5A has no cathode band or polarity marking on the SMA (DO-214AC) case. Both terminals are functionally identical, enabling symmetrical placement across differential lines or uncommitted signal paths without orientation constraints during automated assembly.
What is the thermal resistance of P4SMA33CA-E3/5A in standard mounting conditions?
The P4SMA33CA-E3/5A 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 Figure 2 in Vishay document 88367. This value assumes still air and defines safe power derating above 25 °C ambient temperature.
How does the leakage current of P4SMA33CA-E3/5A compare to unidirectional variants?
The P4SMA33CA-E3/5A specifies maximum reverse leakage (ID) of 1.0 µA at 33 V VWM - identical to unidirectional P4SMA33A-E3/5A. Bidirectional construction does not increase leakage; both variants use the same glass-passivated junction process and achieve equally low standby current for precision analog or battery-powered applications.
P4SMA33CA-E3/5A 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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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)
P4SMA33CA-E3/5A FAQ
1.How can I place an order for P4SMA33CA-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA33CA-E3/5A 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 P4SMA33CA-E3/5A reliable?
The price and inventory of P4SMA33CA-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA33CA-E3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA33CA-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA33CA-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA33CA-E3/5A?
P4SMA33CA-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA33CA-E3/5A 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 P4SMA33CA-E3/5A?
For technical support, including P4SMA33CA-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA33CA-E3/5A requirements.
6.How does Aetrix verify that P4SMA33CA-E3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA33CA-E3/5A 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 P4SMA33CA-E3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA33CA-E3/5A?
All P4SMA33CA-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA33CA-E3/5A, 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 P4SMA33CA-E3/5A part is unused and in its original packaging.
Return procedure for P4SMA33CA-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA33CA-E3/5A Tags
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