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Vishay General Semiconductor - Diodes Division P4SMA33AHE3/5A
- Part No.:
- P4SMA33AHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA33AHE3/5A.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,873
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Product details
Overview
P4SMA33AHE3/5A 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 IT = 1.0 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 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and automotive electronics.
For engineers reviewing the P4SMA33AHE3/5A datasheet, P4SMA33AHE3/5A pinout, P4SMA33AHE3/5A application, or P4SMA33AHE3/5A equivalent, key selection criteria include its AEC-Q101 qualification, SMA (DO-214AC) package compatibility, unidirectional polarity with cathode band marking, and thermal resistance (RθJA = 120 °C/W) under standard PCB pad layout.
Technical Context
This TVS diode operates as a clamping device that enters avalanche conduction when reverse voltage exceeds its breakdown threshold, diverting surge current away from protected circuitry. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the 10/1000 µs waveform rating reflects standardized surge immunity testing per ANSI/IEEE C62.35.
The device is rated for repetitive surges at 0.01% duty cycle (300 W above 91 V), but P4SMA33AHE3/5A maintains full 400 W capability due to its 33 V rating. It supports operation from −65 °C to +150 °C junction temperature and meets J-STD-020 MSL Level 1 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V at 1.0 mA test current - defines precise avalanche onset range for reliable clamping trigger |
| VWM | 28.2 V maximum - ensures no conduction during normal 24 V system operation with margin |
| VC @ IPPM | 45.7 V at 8.8 A - limits downstream voltage stress during 400 W transient events |
| PPPM | 400 W (10/1000 µs) - withstands common lightning-induced and inductive-switching surges |
| IFSM | 40 A (8.3 ms half-sine) - handles single-event high-current faults without bond-wire failure |
| RθJA | 120 °C/W - requires minimum 5.0 mm × 5.0 mm copper pads per terminal for thermal management |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling and HTRB |
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 identified by black band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / reverse surge return path | Connected to protected line's low-side or ground-referenced node during transient suppression |
| Cathode | Avalanche conduction terminal / clamping reference | Marked with band; ties to higher-potential rail (e.g., 24 V supply) to enable unidirectional clamping |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage (<1 µA) over lifetime and temperature |
| 400 W peak pulse power (10/1000 µs) | Protects against IEC 61000-4-5 Level 4 surges (4 kV line-to-ground) in 24 V systems |
| AEC-Q101 qualification | Validated for automotive powertrain and body electronics with extended temperature and life testing |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without preconditioning or baking |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD or relay bounce) |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input |
|---|---|
Use Scenario: Protects microcontroller GPIOs and level-shifters from load-dump and alternator ripple in 12 V/24 V vehicle subsystems. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between input pin and battery rail to shunt positive-going transients. Use Value: Limits voltage to ≤45.7 V during 400 W surges, preventing latch-up or oxide damage in 3.3 V/5 V logic interfaces. |
Use Scenario: Shields 24 V digital input circuits from inductive kickback when switching solenoids or relays. IC Role / Device Role / Timing Role: Standoff protection device mounted at connector entry point, referenced to 24 V supply. Use Value: Clamps transients within 1 ns response time, maintaining signal integrity and avoiding false triggering of optocouplers or Schmitt triggers. |
| Telecom Power Supply Rail | Automotive Sensor Signal Line |
Use Scenario: Guards primary-side DC-DC converter inputs against lightning-induced surges on outdoor telecom power feeds. IC Role / Device Role / Timing Role: Front-end transient suppressor on 48 V input rail, upstream of EMI filter and controller IC. Use Value: Absorbs 400 W pulses without degradation, preserving long-term reliability under repeated surge exposure per IEC 61000-4-5. |
Use Scenario: Protects analog output lines of pressure or temperature sensors exposed to motor noise in engine bays. IC Role / Device Role / Timing Role: Low-capacitance (typ. <50 pF) unidirectional TVS placed at sensor harness connector. Use Value: Maintains signal fidelity below 1 MHz while clamping EFT bursts to safe levels for 12-bit ADC front-ends. |
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 lower PPPM = 400 W only up to 33 V; not AEC-Q101 qualified | Limited to commercial-grade industrial use; lacks automotive qualification and traceability | Select when AEC-Q101 is not required and cost sensitivity outweighs qualification needs |
| 1.5SMC33A | Higher-power SMC package (1500 W), same VBR range, but larger footprint (7.11 × 6.22 mm vs. SMA's 4.50 × 3.99 mm) | Used where board space allows and higher surge margin is needed beyond 400 W | Choose for legacy designs using SMC or where system-level surge testing exceeds IEC 61000-4-5 Level 4 |
Compared with SMAJ33A-E3/5A and 1.5SMC33A, P4SMA33AHE3/5A uniquely combines AEC-Q101 qualification, compact SMA footprint, and verified 400 W clamping performance - making it optimal for space-constrained automotive and industrial modules requiring production traceability and extended temperature compliance.
Availability
P4SMA33AHE3/5A is available at Aetrix Electronics and suitable for automotive body control units, industrial PLC digital inputs, telecom power supplies, and sensor interface protection requiring stable component supply across multi-year production cycles.
Supply support for P4SMA33AHE3/5A 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, TVS devices, and power MOSFETs with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA series was developed for robust, surface-mount transient suppression in automotive, industrial, and telecom systems - delivering consistent clamping performance, AEC-Q101 compliance, and compatibility with automated assembly processes.
FAQ
What is the clamping voltage of P4SMA33AHE3/5A at its rated peak pulse current?
The P4SMA33AHE3/5A has a maximum clamping voltage (VC) of 45.7 V at 8.8 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components see no more than 45.7 V during a 400 W transient event. The P4SMA33AHE3/5A maintains this specification across its operating temperature range and after multiple surge events when applied within derating guidelines.
Is P4SMA33AHE3/5A suitable for automotive applications?
Yes, P4SMA33AHE3/5A is AEC-Q101 qualified and explicitly designated for automotive use with ordering code suffix "HE3". It undergoes stress testing for temperature cycling, high-temperature reverse bias, and accelerated life validation per AEC-Q101 Rev D. The P4SMA33AHE3/5A is commonly deployed in body control modules, lighting drivers, and sensor interfaces where 24 V rail protection is required under harsh environmental conditions.
What does the "HE3/5A" suffix mean in P4SMA33AHE3/5A?
In P4SMA33AHE3/5A, "HE3" indicates RoHS-compliant construction with AEC-Q101 qualification, while "5A" specifies packaging in 13-inch diameter tape-and-reel format with 7500 units per reel. This differs from "/61" (7-inch reel, 1800 units) and confirms the part meets automotive-grade material and reliability requirements. The P4SMA33AHE3/5A is not a variant - it is the full orderable part number reflecting both qualification and packaging.
How does P4SMA33AHE3/5A differ from bidirectional versions like P4SMA33CA?
P4SMA33AHE3/5A is unidirectional and features a cathode band for polarity-sensitive placement, clamping only positive transients relative to ground. In contrast, P4SMA33CA is bidirectional with symmetric breakdown in both directions and no polarity marking. The P4SMA33AHE3/5A offers lower leakage (<1.0 µA at VWM) and is preferred for DC supply rail protection, whereas P4SMA33CA suits AC-coupled or floating signal lines where polarity is undefined.
What PCB layout guidance applies to P4SMA33AHE3/5A for optimal thermal performance?
For reliable operation at rated power, P4SMA33AHE3/5A requires minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, per Vishay's datasheet Fig. 2 derating curve. Traces should be short and wide to minimize inductance, and thermal vias under pads improve heat dissipation. The P4SMA33AHE3/5A achieves RθJA = 120 °C/W only with this layout; reduced copper area increases junction temperature and reduces surge endurance.
P4SMA33AHE3/5A 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):
- 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)
P4SMA33AHE3/5A FAQ
1.How can I place an order for P4SMA33AHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA33AHE3/5A 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 P4SMA33AHE3/5A reliable?
The price and inventory of P4SMA33AHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA33AHE3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA33AHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA33AHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA33AHE3/5A?
P4SMA33AHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA33AHE3/5A 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 P4SMA33AHE3/5A?
For technical support, including P4SMA33AHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA33AHE3/5A requirements.
6.How does Aetrix verify that P4SMA33AHE3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA33AHE3/5A 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 P4SMA33AHE3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA33AHE3/5A?
All P4SMA33AHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA33AHE3/5A, 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 P4SMA33AHE3/5A part is unused and in its original packaging.
Return procedure for P4SMA33AHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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