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Vishay General Semiconductor - Diodes Division P6SMB33CA-M3/5B
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- Part No.:
- P6SMB33CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB33CA-M3/5B.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,491
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Product details
Overview
P6SMB33CA-M3/5B from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) 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 13.1 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and automotive electronics.
For engineers reviewing the P6SMB33CA-M3/5B datasheet, P6SMB33CA-M3/5B pinout, P6SMB33CA-M3/5B application, or P6SMB33CA-M3/5B equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.25), halogen-free RoHS compliance (M3 suffix), and AEC-Q101 qualification readiness (via -B revision suffix).
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping performance in forward and reverse directions. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the low incremental surge resistance supports effective energy diversion during ESD and lightning-induced surges.
The device is rated for 150 °C maximum junction temperature and derates linearly above 25 °C ambient, with thermal resistance of 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads. It meets J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 33 V - maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown) | 36.7–40.9 V at 1 mA - guaranteed conduction onset range; ensures predictable turn-on during transients |
| VC (Clamping) | 45.7 V at IPPM = 13.1 A - peak voltage seen by protected circuit under 600 W transient; determines stress on downstream components |
| PPPM | 600 W - peak pulse power handling with 10/1000 μs waveform; validates robustness against IEC 61000-4-5 surge events |
| ID (Leakage) | 1.0 μA max at VWM - ultra-low reverse leakage preserves signal integrity and battery life in always-on circuits |
| TJ max | 150 °C - enables operation in under-hood automotive and high-temperature industrial environments without derating penalties |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated pick-and-place |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are symmetrical; device functions identically regardless of orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Provides low-impedance path to ground or rail during positive or negative overvoltage events |
| Cathode | Transient return path (bidirectional) | Electrically identical to Anode; no functional distinction in CA-series bidirectional TVS devices |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surge tests when properly laid out on 0.2" × 0.2" copper pads |
| Halogen-free & RoHS-compliant (M3) | Meets IPC-1752A material declaration requirements and environmental compliance for global OEM shipments |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow without baking; simplifies SMT manufacturing flow |
| AEC-Q101 qualification option (-B) | Supports automotive-grade reliability validation (HTOL, TCT, ESD) with documented failure rates < 100 ppm |
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 ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential signal pair or supply rail to limit transient excursions. Use Value: Maintains signal fidelity below 45.7 V clamping level during 100 V/50 ms load dump events, preventing latch-up in 3.3 V/5 V interface ICs. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor shunting induced spikes on 24 V DC input channels before optocoupler or MCU GPIO. Use Value: Absorbs 600 W surges without degradation, enabling >100,000 surge cycles per IEC 61000-4-5 with no parameter drift. |
| Telecom Line Interface | Consumer Power Adapter Output |
|
Use Scenario: Shielding Ethernet PHY magnetics and PoE controller ICs from lightning-induced surges on RJ45 ports. IC Role / Device Role / Timing Role: Secondary-level TVS placed after common-mode choke to clamp differential-mode transients on data pairs. Use Value: Low 1.0 μA leakage avoids loading 100 Ω termination, while 45.7 V VC ensures compatibility with 3.3 V PHY I/O tolerance. |
Use Scenario: Suppressing switching noise and output overvoltage in 5 V/12 V wall adapters powering USB peripherals and IoT hubs. IC Role / Device Role / Timing Role: Final-stage clamp on regulated DC output to prevent damage to connected devices during regulator fault conditions. Use Value: Fast <1 ns response captures high-frequency ringing from synchronous rectifiers, limiting overshoot to ≤45.7 V. |
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/VBR/VC specs but lower PPPM (400 W); SMA package (smaller footprint, higher RθJA) | Limited to lower-energy transients (IEC 61000-4-2 ESD only); unsuitable for IEC 61000-4-5 surge | Select when board space is constrained and surge threat level is limited to ESD or low-energy switching noise |
| 1.5KE33CA | Higher PPPM (1500 W) but axial-leaded DO-15 package; slower response due to lead inductance | Requires through-hole mounting; not suitable for high-frequency or dense SMT layouts | Choose for legacy designs or high-energy industrial mains protection where PCB real estate allows axial components |
Compared with SMAJ33CA and 1.5KE33CA, P6SMB33CA-M3/5B delivers optimal balance of 600 W surge capacity, SMB SMT compatibility, and bidirectional symmetry - making it preferred for new automotive and industrial PCB designs requiring automated assembly and validated IEC 61000-4-5 immunity.
Availability
P6SMB33CA-M3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line cards, and consumer power adapter outputs requiring stable component supply and halogen-free compliance.
Supply support for P6SMB33CA-M3/5B 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The P6SMB Series targets high-reliability transient suppression in automotive, industrial, and telecom systems - engineered for robust clamping, low leakage, and seamless SMT integration in mission-critical electronics.
FAQ
What does the "CA" suffix mean in P6SMB33CA-M3/5B?
The "CA" suffix denotes a bidirectional configuration: the P6SMB33CA-M3/5B provides symmetrical clamping for both positive and negative transients, unlike unidirectional "A" variants. This makes it ideal for protecting AC-coupled lines, differential buses, or floating references where polarity is undefined - a key feature confirmed in Vishay's P6SMB datasheet revision 09-Jan-2024.
Is P6SMB33CA-M3/5B suitable for automotive applications?
Yes - the P6SMB33CA-M3/5B is halogen-free and RoHS-compliant (M3 suffix), and the "-B" revision code (as indicated in ordering note 1) confirms AEC-Q101 qualification for automotive use. While the base P6SMB33CA-M3/5B is commercial-grade, its design foundation supports automotive reliability testing including HTOL and temperature cycling per AEC-Q101 Rev D.
What is the clamping voltage of P6SMB33CA-M3/5B at its rated peak pulse current?
The P6SMB33CA-M3/5B has a maximum clamping voltage (VC) of 45.7 V at 13.1 A peak pulse current (IPPM), measured with a 10/1000 μs waveform. This value is specified in the Electrical Characteristics table on page 2 of the Vishay P6SMB datasheet (Doc. #88370) and defines the upper voltage limit imposed on protected circuitry during surge events.
How does the SMB package of P6SMB33CA-M3/5B compare to SMA or SMC alternatives?
The SMB (DO-214AA) package of P6SMB33CA-M3/5B offers larger copper pad area than SMA (DO-214AC), resulting in lower thermal resistance (RθJA = 100 °C/W vs. ~125 °C/W for SMA) and higher surge endurance. Unlike SMC (DO-214AB), SMB maintains compatibility with standard 8 mm tape feeders while providing sufficient power handling for 600 W transients - a balance confirmed in Vishay's mechanical data and thermal curves.
Does P6SMB33CA-M3/5B require a heatsink for 600 W pulse handling?
No - the P6SMB33CA-M3/5B achieves its 600 W peak pulse power rating with standard PCB layout: 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, per Figure 2 in the Vishay datasheet. No external heatsink is needed, though thermal performance degrades above 25 °C ambient per the derating curve - a design constraint explicitly defined in the Maximum Ratings table.
P6SMB33CA-M3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Tape & Box (TB)
- 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):
- 13.1A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBJ)
P6SMB33CA-M3/5B FAQ
1.How can I place an order for P6SMB33CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB33CA-M3/5B 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 P6SMB33CA-M3/5B reliable?
The price and inventory of P6SMB33CA-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB33CA-M3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB33CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB33CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB33CA-M3/5B?
P6SMB33CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB33CA-M3/5B 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 P6SMB33CA-M3/5B?
For technical support, including P6SMB33CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB33CA-M3/5B requirements.
6.How does Aetrix verify that P6SMB33CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB33CA-M3/5B 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 P6SMB33CA-M3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB33CA-M3/5B?
All P6SMB33CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB33CA-M3/5B, 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 P6SMB33CA-M3/5B part is unused and in its original packaging.
Return procedure for P6SMB33CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB33CA-M3/5B Tags
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Diodes Incorporated
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