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Vishay General Semiconductor - Diodes Division P6SMB33CA-E3/5B
- Part No.:
- P6SMB33CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB33CA-E3/5B.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,739
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Product details
Overview
P6SMB33CA-E3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power rails 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 rating with 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the P6SMB33CA-E3/5B datasheet, P6SMB33CA-E3/5B pinout, P6SMB33CA-E3/5B application, or P6SMB33CA-E3/5B equivalent, key selection criteria include bidirectional clamping symmetry, low thermal resistance (RθJL = 20 °C/W), RoHS-compliant matte tin plating, and AEC-Q101 qualification eligibility via HE3/HM3 variants.
Technical Context
The P6SMB33CA-E3/5B operates as a silicon avalanche diode with glass-passivated junction, delivering symmetrical clamping in both polarities. Its breakdown voltage (VBR) is specified at 31.4–34.7 V (min/max) with 1 mA test current, and it maintains stable performance across -65 °C to +150 °C junction temperature range.
It uses a unidirectional/bidirectional SMB (DO-214AA) package with no polarity marking for bidirectional types, and meets J-STD-020 MSL Level 1 with 260 °C lead-free reflow peak. The device exhibits 0.098 %/°C temperature coefficient of VBR and <1 μA reverse leakage at VWM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 28.2 V - Maximum continuous reverse voltage before significant conduction begins; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 31.4–34.7 V at 1 mA - Avalanche onset range; ensures predictable turn-on during transients |
| VC (Clamping Voltage) | 45.7 V at 13.1 A IPPM - Peak voltage seen by protected circuit during 10/1000 μs surge; critical for IC survival |
| PPPM (Peak Pulse Power) | 600 W - Sustains high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a) without failure |
| RθJL (Junction-to-Lead) | 20 °C/W - Enables efficient heat transfer to PCB copper pads; supports repetitive surge handling |
| Package | SMB (DO-214AA) - Surface-mount footprint (5.59 mm × 4.06 mm) optimized for automated placement and space-constrained layouts |
| Compliance | RoHS-compliant (E3 suffix), UL 94 V-0 molding compound, JESD201 Class 2 whisker resistance |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration with no polarity marking. Cathode/anode terminals are functionally symmetric; device mounts on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for thermal and mechanical reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Conducts during negative-going surges; forms symmetrical path with cathode for bidirectional clamping |
| Cathode | Transient current entry (positive polarity) | Conducts during positive-going surges; enables identical clamping behavior in both directions |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Identical VBR min/max and VC across both polarities - eliminates need for polarity-aware layout in AC-coupled or floating lines |
| 600 W 10/1000 μs pulse rating | Withstands automotive load-dump and inductive switching events without degradation under defined duty cycle (0.01 %) |
| Glass-passivated junction | Ensures long-term stability and low leakage (<1 μA at VWM) across temperature and humidity stress conditions |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking - reduces manufacturing overhead and risk of popcorning |
| AEC-Q101 qualification path | HE3/HM3 variants available - supports functional safety requirements in automotive ECUs and ADAS sensor nodes |
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 ESD and load dump in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector interface to clamp fast transients before they reach signal conditioning circuitry. Use Value: Maintains 28.2 V standoff while limiting surge voltage to ≤45.7 V, preserving signal integrity and preventing latch-up in 3.3 V/5 V microcontrollers. |
Use Scenario: Shielding digital input/output channels in programmable logic controllers against field-induced surges from solenoid switching or motor drives. IC Role / Device Role / Timing Role: Parallel-connected TVS on each I/O line to absorb repetitive 600 W pulses without derating or thermal runaway. Use Value: RθJL of 20 °C/W enables reliable operation at 85 °C ambient with minimal PCB copper area - reducing heatsink dependency. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Safeguarding Ethernet PHYs and PoE injectors from lightning-induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Primary-level TVS on differential pairs, coordinated with gas discharge tubes for staged protection. Use Value: 45.7 V clamping voltage aligns with IEEE 802.3af/at voltage limits, ensuring compatibility with 48 V PoE systems. |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters for smart home devices exposed to mains transients. IC Role / Device Role / Timing Role: Final-stage clamp after primary-side MOV and secondary-side filtering, targeting fast-rising spikes. Use Value: Low 0.098 %/°C VBR drift ensures consistent clamping across operating temperature range (-40 °C to +85 °C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33CA | Same SMB package, but lower PPPM (400 W); higher clamping voltage (53.3 V at 7.5 A) | Limited to lower-energy transients; not suitable for ISO 7637-2 Pulse 5a compliance | Select P6SMB33CA-E3/5B when 600 W surge immunity and tighter clamping are required. |
| 1.5KE33CA | Higher-power DO-201 package (1500 W), larger footprint (9.5 mm × 3.9 mm), axial leads | Requires through-hole assembly or adapter; unsuitable for high-density SMT designs | Choose P6SMB33CA-E3/5B for space-constrained PCBs where surface-mount automation is mandatory. |
Compared with SMAJ33CA and 1.5KE33CA, the P6SMB33CA-E3/5B delivers optimal balance of 600 W surge capability, SMB footprint, and 45.7 V clamping - making it preferred for automotive and industrial SMT applications demanding compact, high-reliability TVS protection.
Availability
P6SMB33CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for P6SMB33CA-E3/5B 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 automotive-grade qualification.
The P6SMB Series targets board-level transient suppression in harsh environments, with design focus on high pulse power density, low clamping voltage, and seamless integration into automated SMT lines.
FAQ
What is the clamping voltage of the P6SMB33CA-E3/5B under a 10/1000 μs surge?
The P6SMB33CA-E3/5B has a maximum clamping voltage (VC) of 45.7 V at 13.1 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured per Figure 1 in the Vishay datasheet 88370 and represents the upper voltage limit imposed on protected circuitry during standardized surge events.
Is the P6SMB33CA-E3/5B suitable for automotive applications?
The P6SMB33CA-E3/5B itself is RoHS-compliant commercial grade (E3 suffix), but Vishay offers AEC-Q101 qualified variants under HE3/HM3 ordering codes. For automotive use, specify P6SMB33CAHE3_B or P6SMB33CAHM3_B - the P6SMB33CA-E3/5B requires qualification validation per customer requirements before deployment in safety-critical systems.
How does the bidirectional configuration of the P6SMB33CA-E3/5B affect its PCB layout?
The P6SMB33CA-E3/5B has no polarity marking and identical electrical behavior in both directions, so PCB layout requires no orientation alignment. This simplifies placement in AC-coupled paths, differential signaling, or floating grounds - unlike unidirectional TVS diodes that mandate strict cathode/anode routing.
What is the thermal resistance from junction to ambient for the P6SMB33CA-E3/5B?
The typical junction-to-ambient thermal resistance (RθJA) of the P6SMB33CA-E3/5B is 100 °C/W when mounted on minimum recommended pad layout (0.2" × 0.2" copper per terminal). For sustained power dissipation, thermal design must account for this value to avoid exceeding the 150 °C maximum junction temperature.
Does the P6SMB33CA-E3/5B meet any flammability standards?
Yes, the P6SMB33CA-E3/5B uses a molding compound rated UL 94 V-0, confirming its ability to self-extinguish within 10 seconds after flame removal and resist dripping of flaming particles - a requirement for many industrial and consumer end-equipment safety certifications.
P6SMB33CA-E3/5B 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:
- 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 (SMB)
P6SMB33CA-E3/5B FAQ
1.How can I place an order for P6SMB33CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB33CA-E3/5B 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-E3/5B reliable?
The price and inventory of P6SMB33CA-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB33CA-E3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB33CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB33CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB33CA-E3/5B?
P6SMB33CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB33CA-E3/5B 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-E3/5B?
For technical support, including P6SMB33CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB33CA-E3/5B requirements.
6.How does Aetrix verify that P6SMB33CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB33CA-E3/5B 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-E3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB33CA-E3/5B?
All P6SMB33CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB33CA-E3/5B, 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-E3/5B part is unused and in its original packaging.
Return procedure for P6SMB33CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB33CA-E3/5B Tags
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Diodes Incorporated
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