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Vishay General Semiconductor - Diodes Division P6SMB33CAHE3_A/I
- Part No.:
- P6SMB33CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB33CAHE3_A/I.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,508
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Product details
Overview
P6SMB33CAHE3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for clamping voltage transients on power and signal lines. It features a 33 V standoff voltage (VWM), 45.7 V maximum clamping voltage at 13.1 A peak pulse current, and 600 W peak pulse power capability with a 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the P6SMB33CAHE3_A/I datasheet, P6SMB33CAHE3_A/I pinout, P6SMB33CAHE3_A/I application, or P6SMB33CAHE3_A/I equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, SMB (DO-214AA) package compatibility, and thermal derating behavior above 25 °C ambient.
Technical Context
This TVS operates in bidirectional mode with symmetrical breakdown characteristics - no polarity marking required - and delivers fast response time (<1 ns) to transient events such as ESD, lightning-induced surges, and inductive switching spikes. Its glass-passivated junction ensures stable leakage performance and low incremental surge resistance under repetitive stress.
The device is rated for 150 °C maximum junction temperature, exhibits 0.098 %/°C temperature coefficient of VBR, and is qualified to AEC-Q101 for automotive applications - confirmed by HE3 suffix and "_A/I" tape-and-reel packaging per J-STD-020 MSL Level 1 (260 °C peak reflow).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 31.4 V / 34.7 V at 1 mA - guaranteed breakdown threshold range for reliable turn-on margin |
| VC @ IPPM | 45.7 V at 13.1 A - clamping voltage limiting downstream circuit stress during 10/1000 μs surge |
| PPPM | 600 W - peak pulse power handling with 0.01 % duty cycle, enabling robust transient absorption |
| TJ max | +150 °C - supports operation in under-hood automotive and high-temperature industrial environments |
| Package | SMB (DO-214AA) - standardized 2-pin SMD footprint with 5.0 mm × 5.0 mm copper pad thermal design |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Acts as cathode during positive transients and anode during negative transients - enables symmetric clamping |
| Cathode | Transient return path (bidirectional) | Acts as anode during positive transients and cathode during negative transients - no functional distinction in CA devices |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Handles high-energy transients without failure - sufficient for ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 4 |
| AEC-Q101 qualified | Validated for automotive electronics - supports deployment in ADAS sensors, body control modules, and infotainment power rails |
| Glass passivated junction | Ensures long-term stability of leakage current and breakdown voltage across temperature and humidity stress |
| MSL Level 1 | Compatible with standard SMT reflow profiles up to 260 °C peak - no moisture sensitivity handling required |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V and 5 V logic interface protection |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground, absorbing transients before they reach sensitive input stages. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V sensor interface ICs during 12 V/24 V system load dump events. | Use Scenario: Shielding digital and analog I/O channels of programmable logic controllers from field-induced surges in factory automation. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor on each I/O line, activated within <1 ns to limit voltage excursion below IC absolute maximum ratings. Use Value: Enables >100,000 surge cycles without parameter drift - verified per AEC-Q101 stress test conditions. |
| Telecom Line Interface | Power Supply Rail Clamp |
Use Scenario: Safeguarding Ethernet PHYs and RS-485 transceivers against lightning-induced surges on outdoor data lines. IC Role / Device Role / Timing Role: Primary-level TVS on differential pair inputs, coordinated with secondary GDT or polymer PTC for staged protection. Use Value: Clamps common-mode surges to <46 V while maintaining signal integrity up to 100 Mbps due to low junction capacitance (~200 pF at 0 V). | Use Scenario: Secondary overvoltage clamp on 3.3 V or 5 V DC-DC output rails in embedded systems exposed to back-EMF or hot-swap events. IC Role / Device Role / Timing Role: Fast-acting shunt device that diverts excess energy to ground when rail voltage exceeds 33 V, preventing regulator latch-off or capacitor rupture. Use Value: Limits rail overshoot to ≤45.7 V for ≤1 ms - sufficient to avoid triggering downstream undervoltage lockout or brownout reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33CA | Same VWM (33 V), lower PPPM (400 W), SMA package (smaller thermal mass) | Limited to lower-energy transients; not AEC-Q101 qualified | Choose for cost-sensitive consumer designs where automotive qualification is unnecessary |
| 1.5KE33CA | Higher PPPM (1500 W), axial leaded DO-201 package, slower thermal response | Requires through-hole mounting; unsuitable for high-density SMT layouts | Choose only when board space allows axial components and higher surge margin is mandatory |
Compared with SMAJ33CA and 1.5KE33CA, P6SMB33CAHE3_A/I delivers balanced surge robustness (600 W), automotive-grade reliability (AEC-Q101), and compact SMB footprint - making it optimal for space-constrained, mission-critical SMT applications requiring repeatable field performance.
Availability
P6SMB33CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, telecom line interfaces, and DC-DC output rail clamping requiring stable component supply and full traceability.
Supply support for P6SMB33CAHE3_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, rectifiers, MOSFETs, and protection devices with emphasis on reliability and application-specific validation.
The P6SMB Series is engineered for high-reliability transient suppression in automotive, industrial, and telecom systems - delivering consistent clamping performance across temperature, lifetime, and surge repetition.
FAQ
What does the "CA" suffix indicate in P6SMB33CAHE3_A/I?
The "CA" suffix denotes a bidirectional configuration - meaning P6SMB33CAHE3_A/I provides symmetrical clamping for both positive and negative voltage transients without polarity dependence. This eliminates the need for orientation during placement and simplifies layout for AC-coupled or differential signal lines, unlike unidirectional variants (e.g., P6SMB33A) which require cathode alignment.
Is P6SMB33CAHE3_A/I suitable for automotive applications?
Yes, P6SMB33CAHE3_A/I is AEC-Q101 qualified, as confirmed by the "HE3" suffix and documentation in Vishay's P6SMB datasheet (Rev. 09-Jan-2024). It undergoes stress testing for temperature cycling, high-temperature reverse bias, and ESD - making P6SMB33CAHE3_A/I appropriate for under-hood and cabin electronics including ADAS camera modules and body control units.
What is the maximum clamping voltage of P6SMB33CAHE3_A/I and at what current is it specified?
The maximum clamping voltage (VC) of P6SMB33CAHE3_A/I is 45.7 V, measured at a peak pulse current (IPPM) of 13.1 A using a 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is critical for ensuring downstream ICs remain within their absolute maximum ratings.
How does the SMB (DO-214AA) package of P6SMB33CAHE3_A/I compare thermally to larger packages like DO-214AB?
P6SMB33CAHE3_A/I in SMB (DO-214AA) has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W, higher than DO-214AB's ~65 °C/W. This means P6SMB33CAHE3_A/I requires careful PCB layout - specifically 5.0 mm × 5.0 mm copper pads per terminal - to sustain 600 W pulses without exceeding 150 °C junction temperature, especially above 25 °C ambient.
Does P6SMB33CAHE3_A/I have a defined polarity marking on the package?
No, P6SMB33CAHE3_A/I has no polarity marking because it is a bidirectional TVS. Unlike unidirectional P6SMB variants (which feature a cathode band), the CA version uses symmetrical internal structure - both terminals function identically regardless of voltage polarity - so orientation during placement is irrelevant, reducing assembly risk and inspection complexity.
P6SMB33CAHE3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 13.1A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMB)
P6SMB33CAHE3_A/I FAQ
1.How can I place an order for P6SMB33CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB33CAHE3_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 P6SMB33CAHE3_A/I reliable?
The price and inventory of P6SMB33CAHE3_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 P6SMB33CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for P6SMB33CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB33CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB33CAHE3_A/I?
P6SMB33CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB33CAHE3_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 P6SMB33CAHE3_A/I?
For technical support, including P6SMB33CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB33CAHE3_A/I requirements.
6.How does Aetrix verify that P6SMB33CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All P6SMB33CAHE3_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 P6SMB33CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of P6SMB33CAHE3_A/I?
All P6SMB33CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB33CAHE3_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 P6SMB33CAHE3_A/I part is unused and in its original packaging.
Return procedure for P6SMB33CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB33CAHE3_A/I Tags
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DESD3V3E1BL-7B
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Diodes Incorporated
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