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Vishay General Semiconductor - Diodes Division P4SMA33CAHE3/5A
- Part No.:
- P4SMA33CAHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA33CAHE3/5A.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,621
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Product details
Overview
P4SMA33CAHE3/5A 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 breakdown voltage (VBR min/max = 31.4–34.7 V at 1 mA), 28.2 V standoff 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 - used to protect MOSFETs, sensor interfaces, and communication lines in automotive and industrial control systems.
For engineers reviewing the P4SMA33CAHE3/5A datasheet, P4SMA33CAHE3/5A pinout, P4SMA33CAHE3/5A application, or P4SMA33CAHE3/5A equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low incremental surge resistance, thermal resistance (RθJA = 120 °C/W), and compatibility with automated SMT placement on standard PCB copper pads.
Technical Context
This device operates as a voltage-clamped transient protector with symmetrical avalanche behavior in both directions due to its bidirectional construction. It responds within picoseconds to ESD and lightning-induced surges, maintaining clamping performance across -65 °C to +150 °C junction temperature range while meeting J-STD-020 MSL Level 1 reflow requirements (peak 260 °C).
The P4SMA33CAHE3/5A uses a glass-passivated silicon junction and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Its 400 W peak pulse power rating applies up to 91 V; above that threshold, derating reduces it to 300 W - confirmed by Fig. 2 in the datasheet and validated for repetitive 0.01% duty cycle operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 31.4 V / 34.7 V at IT = 1 mA - defines reliable avalanche initiation threshold in either polarity |
| VWM | 28.2 V - maximum continuous reverse working voltage before leakage exceeds 1 μA |
| VC @ IPPM | 45.7 V at 8.8 A (10/1000 µs) - clamping voltage limiting transient energy delivered to protected circuit |
| PPPM | 400 W - peak surge power handling capacity under standardized transient waveform |
| RθJA | 120 °C/W - thermal resistance from junction to ambient air on standard 0.2" × 0.2" copper pads |
| TJ max | +150 °C - maximum allowable junction temperature ensuring long-term reliability under surge stress |
| 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 plastic case with matte tin-plated leads. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); cathode band not marked (bidirectional type).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (either polarity) | Acts as input node during positive or negative voltage excursions; no polarity marking required |
| Cathode | Transient current exit point (either polarity) | Completes conduction path during avalanche; symmetric terminal function enables bidirectional protection |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 400 W peak pulse power | Handles high-energy transients such as ISO 7637-2 Pulse 1/2a/5a in automotive ECUs without degradation |
| AEC-Q101 qualification | Validates suitability for under-hood and ADAS applications requiring extended temperature and lifetime reliability |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile compatibility (peak 260 °C) |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage (<1 μA at VWM) over 10+ year field life |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Line Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors exposed to load-dump and inductive switching noise in engine control modules. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across differential sensor outputs to limit transients before signal conditioning amplifier inputs. Use Value: Prevents latch-up or damage to precision op-amps and ADCs by clamping spikes to ≤45.7 V while maintaining <1 μA leakage at 28.2 V nominal supply. |
Use Scenario: Safeguarding CAN_H/CAN_L differential pair against ESD events and bus faults in factory automation PLCs. IC Role / Device Role / Timing Role: Paired P4SMA33CAHE3/5A devices placed line-to-ground on each bus wire to absorb ±8 kV contact ESD per IEC 61000-4-2. Use Value: Maintains CAN signal integrity below 1 Mbps by limiting junction capacitance to <100 pF at VWM, verified per Fig. 4 of datasheet. |
| Consumer USB Port ESD Protection | Telecom Power Supply Input Clamping |
Use Scenario: Adding secondary-level ESD robustness to USB 2.0 D+/D− lines in set-top boxes after primary TVS array. IC Role / Device Role / Timing Role: Standalone bidirectional suppressor mounted near connector to shunt fast transients before USB transceiver IC. Use Value: Achieves <1 ns response time and clamps 15 kV air discharge to <45.7 V, preserving eye diagram margin and bit error rate. |
Use Scenario: Front-end transient suppression on 24 V DC input rails of VoIP gateways subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device placed between input filter and DC-DC converter to limit surge energy entering power stage. Use Value: Absorbs 400 W peak pulses per IEC 61000-4-5 Level 3 (1 kV/2 Ω) without failure, validated via 1000-cycle endurance test. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | Higher package thermal mass (SMB/DO-214AA); RθJA = 85 °C/W vs. 120 °C/W; same VBR/VC specs | Better power dissipation in high-ambient environments; requires larger PCB pad area | Select when board layout allows SMB footprint and thermal management prioritizes lower junction rise |
| 1.5KE33CA | Through-hole TO-204AE (DO-41); 1500 W peak power; higher VC = 53.3 V at 28.3 A | Legacy designs with through-hole assembly; unsuitable for dense SMT layouts | Choose only for repair/refurbish of existing through-hole systems where rework is constrained |
Compared with SMBJ33CA and 1.5KE33CA, the P4SMA33CAHE3/5A offers optimal balance of AEC-Q101 compliance, compact SMA footprint, and sufficient 400 W surge rating for modern automotive and industrial SMT designs - without requiring PCB redesign or sacrificing reliability certification.
Availability
P4SMA33CAHE3/5A is available at Aetrix Electronics and suitable for automotive sensor modules, industrial CAN networks, consumer USB interfaces, and telecom power supplies requiring stable component supply with full traceability and AEC-Q101 validation.
Supply support for P4SMA33CAHE3/5A 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 targets cost-sensitive, high-volume transient protection needs in automotive, industrial, and communications equipment - delivering standardized TVS performance in compact, AEC-Q101-qualified surface-mount packages.
FAQ
What is the clamping voltage of P4SMA33CAHE3/5A at its rated peak pulse current?
The P4SMA33CAHE3/5A has a maximum clamping voltage (VC) of 45.7 V at 8.8 A peak pulse current with a 10/1000 µs waveform. This value is measured per Figure 1 and Table on page 2 of the Vishay datasheet 88367, and defines the upper voltage limit imposed on protected circuitry during surge events. The P4SMA33CAHE3/5A maintains this clamping performance across its full operating temperature range.
Is P4SMA33CAHE3/5A suitable for automotive applications?
Yes, P4SMA33CAHE3/5A is AEC-Q101 qualified and explicitly designated for automotive use with ordering code suffix "HE3". It undergoes stress testing including temperature cycling, high-temperature reverse bias, and ESD per AEC standards. The P4SMA33CAHE3/5A is commonly deployed in engine control units, body electronics, and ADAS sensor interfaces where transient immunity and long-term reliability are critical.
What does the "CA" suffix indicate in P4SMA33CAHE3/5A?
The "CA" suffix in P4SMA33CAHE3/5A denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., P4SMA33A), the P4SMA33CAHE3/5A has no polarity marking and functions identically regardless of voltage polarity applied across its terminals.
What is the standoff voltage rating of P4SMA33CAHE3/5A?
The standoff voltage (VWM) of P4SMA33CAHE3/5A is 28.2 V - the maximum continuous DC or RMS voltage the device can withstand without exceeding 1 μA reverse leakage current. This parameter ensures the P4SMA33CAHE3/5A remains non-conductive during normal operation while remaining ready to avalanche instantly upon transient overvoltage detection.
How does the thermal resistance of P4SMA33CAHE3/5A affect PCB layout?
The P4SMA33CAHE3/5A 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 terminal. To maintain safe junction temperatures during repeated surges, PCB layout must provide at least this minimum pad area - undersized pads increase thermal impedance and risk premature failure. The P4SMA33CAHE3/5A datasheet specifies exact mounting dimensions in Figure on page 5.
P4SMA33CAHE3/5A 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:
- -
- 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)
P4SMA33CAHE3/5A FAQ
1.How can I place an order for P4SMA33CAHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA33CAHE3/5A 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 P4SMA33CAHE3/5A reliable?
The price and inventory of P4SMA33CAHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA33CAHE3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA33CAHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA33CAHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA33CAHE3/5A?
P4SMA33CAHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA33CAHE3/5A 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 P4SMA33CAHE3/5A?
For technical support, including P4SMA33CAHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA33CAHE3/5A requirements.
6.How does Aetrix verify that P4SMA33CAHE3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA33CAHE3/5A 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 P4SMA33CAHE3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA33CAHE3/5A?
All P4SMA33CAHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA33CAHE3/5A, 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 P4SMA33CAHE3/5A part is unused and in its original packaging.
Return procedure for P4SMA33CAHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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