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Vishay General Semiconductor - Diodes Division P4SMA33CAHE3/61
- Part No.:
- P4SMA33CAHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA33CAHE3/61.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,829
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Product details
Overview
P4SMA33CAHE3/61 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in the P4SMA series, designed for clamping voltage transients on signal and power 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 rated IPPM, and AEC-Q101 qualification for automotive use - deployed in sensor interface protection and MOSFET gate drive circuits.
For engineers reviewing the P4SMA33CAHE3/61 datasheet, P4SMA33CAHE3/61 pinout, P4SMA33CAHE3/61 application, or P4SMA33CAHE3/61 equivalent, this page delivers verified electrical parameters, package dimensions, clamping behavior under surge conditions, and validated alternatives for ESD/lightning transient suppression in automotive and industrial electronics.
Technical Context
The P4SMA33CAHE3/61 operates as a bidirectional avalanche diode, symmetrically clamping both positive and negative transients without polarity dependence. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at 28.2 V), while MSL Level 1 rating supports lead-free reflow up to 260 °C.
It delivers 400 W peak pulse power per 10/1000 µs waveform (derated to 300 W above 91 V), with thermal resistance RθJA = 120 °C/W and RθJL = 30 °C/W. The device is rated for TJ = –65 to +150 °C and meets UL 497B recognition for protector classification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V at IT = 1 mA - defines precise clamping onset threshold for bidirectional overvoltage events |
| VWM | 28.2 V - maximum continuous reverse working voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 45.7 V - clamped voltage during 8.8 A 10/1000 µs surge, limiting downstream IC stress |
| PPPM | 400 W - peak transient energy absorption capability under standard lightning surge waveform |
| IPPM | 8.8 A - maximum non-repetitive surge current the device sustains without failure |
| TJ max. | +150 °C - enables operation in under-hood automotive environments and high-ambient industrial settings |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking - bidirectional symmetry eliminates cathode/anode orientation concerns during placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Provides symmetrical conduction for ± surges; connects to protected line or ground reference |
| Cathode | Transient return path (bidirectional) | Electrically identical to Anode in CA devices; forms dual-junction structure enabling bidirectional clamping |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| 400 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 Level 3 surge (1 kV line-to-ground) with margin in typical PCB layouts |
| AEC-Q101 qualification | Validates robustness for automotive applications including engine control units and ADAS sensor interfaces |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without pre-baking or special handling |
| UL 497B recognized (QVGQ2) | Meets safety agency requirements for telecom and industrial surge protection system certification |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Line Protection |
|---|---|
|
Use Scenario: Protecting analog outputs of pressure/temperature sensors in engine bay modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed across sensor output and ground to clamp transients before they reach ADC input or signal conditioner. Use Value: Limits voltage excursion to ≤45.7 V during 8.8 A surge, preserving 12-bit sensor accuracy and preventing latch-up in downstream op-amps. |
Use Scenario: Guarding CAN_H/CAN_L differential pair against ESD (IEC 61000-4-2) and fast transient bursts in factory automation nodes. IC Role / Device Role / Timing Role: One P4SMA33CAHE3/61 per line (CAN_H–GND and CAN_L–GND) providing symmetrical clamping without affecting 1 Mbps bus timing. Use Value: Sub-1 ns response time and <1.0 µA leakage at 28.2 V ensure no signal integrity degradation during normal operation while surviving ±25 kV contact ESD. |
| Consumer Power Adapter Input Stage | Telecom DSL Line Interface |
|
Use Scenario: Secondary-side transient suppression on 24 V DC output rails of wall-mounted adapters subjected to lightning-induced surges. IC Role / Device Role / Timing Role: TVS connected between output rail and chassis ground to shunt surge energy away from downstream DC-DC converters and USB controllers. Use Value: 400 W rating handles 10/1000 µs surges up to 8.8 A, maintaining output regulation and avoiding brownout resets during transient events. |
Use Scenario: Protecting ADSL/VDSL line drivers and receivers from induced surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Bidirectional clamping device placed across line transformer secondary to limit common-mode transients before front-end amplifiers. Use Value: 33 V standoff and 45.7 V clamping align with ITU-T K.21 basic protection level, ensuring compliance with Class B telecom surge standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | Same VBR range (31.4–34.7 V), but SMB package (DO-214AA); 600 W PPPM, higher IPPM (13.3 A) | Larger footprint; better suited for higher-energy surges where board space permits | Select when surge energy exceeds 400 W or thermal dissipation requires lower RθJA |
| 1.5KE33CA | Through-hole TO-218 package; 1500 W PPPM, VC = 53.3 V at 28.3 A | Not surface-mount; used in legacy or high-power industrial power supplies | Choose only for through-hole designs requiring >1 kW surge handling; not drop-in compatible |
Compared with SMBJ33CA and 1.5KE33CA, the P4SMA33CAHE3/61 offers optimal balance of AEC-Q101 qualification, compact SMA footprint, and 400 W surge capacity - making it the preferred choice for space-constrained automotive and industrial SMT designs where reliability and manufacturability are critical.
Availability
P4SMA33CAHE3/61 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial CAN networks, consumer power adapters, and telecom DSL interfaces requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4SMA33CAHE3/61 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, and protection devices with emphasis on reliability, efficiency, and application-specific performance.
The P4SMA series was engineered for high-volume, high-reliability transient suppression in automotive, industrial, and telecom systems - delivering consistent clamping, AEC-Q101 validation, and optimized SMT manufacturability.
FAQ
What is the clamping voltage of P4SMA33CAHE3/61 under a 10/1000 µs surge?
The P4SMA33CAHE3/61 clamps to a maximum of 45.7 V when subjected to its rated 8.8 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured at TA = 25 °C on specified copper pad layout and defines the upper voltage limit imposed on protected circuitry during surge events. The P4SMA33CAHE3/61 maintains this clamping performance across its qualified operating temperature range.
Is P4SMA33CAHE3/61 suitable for automotive applications?
Yes, the P4SMA33CAHE3/61 carries AEC-Q101 qualification, confirming its suitability for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. Its construction includes glass-passivated junctions, MSL Level 1 moisture sensitivity rating, and operation up to +150 °C junction temperature - all validated per automotive reliability test standards. The P4SMA33CAHE3/61 is explicitly designated for automotive use via the "HE3" suffix.
How does the bidirectional design of P4SMA33CAHE3/61 affect PCB layout?
The bidirectional nature of the P4SMA33CAHE3/61 eliminates polarity marking and orientation constraints - either terminal may connect to the protected line or ground without functional impact. This simplifies automated placement and reduces risk of assembly error. Unlike unidirectional TVS diodes, the P4SMA33CAHE3/61 requires no cathode band alignment, enabling symmetric routing in differential or AC-coupled signal paths.
What is the maximum steady-state power dissipation of P4SMA33CAHE3/61?
The P4SMA33CAHE3/61 has a maximum steady-state power dissipation (PD) of 3.3 W at TA = 50 °C on an infinite heatsink. In typical surface-mount applications with 0.2" × 0.2" copper pads per terminal, derating applies above 25 °C ambient - e.g., ~2.5 W at 70 °C. This rating governs continuous leakage-based heating, not transient surge handling, and must be considered alongside thermal resistance (RθJA = 120 °C/W) in layout design. The P4SMA33CAHE3/61 is not intended for sustained DC power dissipation.
Does P4SMA33CAHE3/61 meet UL safety certification?
Yes, the P4SMA33CAHE3/61 is Underwriters Laboratories (UL) recognized under file number E136766 for protector classification per UL 497B, covering both unidirectional and bidirectional devices. This certification validates its use in safety-critical surge protection circuits for telecom, industrial, and consumer equipment. The UL mark applies to the entire P4SMA series, including the P4SMA33CAHE3/61 variant with HE3 automotive qualification.
P4SMA33CAHE3/61 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:
- -
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA33CAHE3/61 FAQ
1.How can I place an order for P4SMA33CAHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA33CAHE3/61 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 P4SMA33CAHE3/61 reliable?
The price and inventory of P4SMA33CAHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA33CAHE3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA33CAHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA33CAHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA33CAHE3/61?
P4SMA33CAHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA33CAHE3/61 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 P4SMA33CAHE3/61?
For technical support, including P4SMA33CAHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA33CAHE3/61 requirements.
6.How does Aetrix verify that P4SMA33CAHE3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA33CAHE3/61 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 P4SMA33CAHE3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA33CAHE3/61?
All P4SMA33CAHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA33CAHE3/61, 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 P4SMA33CAHE3/61 part is unused and in its original packaging.
Return procedure for P4SMA33CAHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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