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Vishay General Semiconductor - Diodes Division P6SMB33CAHM3_B/I
- Part No.:
- P6SMB33CAHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB33CAHM3_B/I.pdf
- Description:
- 600W,33V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,422
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Product details
Overview
P6SMB33CAHM3_B/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P6SMB series, 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 capability with a 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial systems.
For engineers reviewing the P6SMB33CAHM3_B/I datasheet, P6SMB33CAHM3_B/I pinout, P6SMB33CAHM3_B/I application, or P6SMB33CAHM3_B/I equivalent, key selection criteria include bidirectional clamping performance, AEC-Q101 qualification, SMB (DO-214AA) package compatibility, and thermal resistance (RθJA = 100 °C/W) under transient surge conditions.
Technical Context
This device operates as a bidirectional avalanche diode, symmetrically clamping voltage surges in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, enabling fast response (<1 ns) to ESD and lightning-induced transients.
Rated for 150 °C maximum junction temperature and compliant with J-STD-020 MSL Level 1 (peak reflow 260 °C), the P6SMB33CAHM3_B/I supports automated SMT assembly and meets halogen-free, RoHS-compliant requirements per HM3 suffix designation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 33 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown) | 36.7–40.6 V at 1 mA - Confirmed avalanche initiation range; ensures reliable turn-on during overvoltage events. |
| VC (Clamping) | 45.7 V at 13.1 A IPPM - Peak voltage seen by protected circuit during 10/1000 μs surge; critical for downstream component survivability. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 μs waveform; enables robust protection against IEC 61000-4-5 surge events. |
| ID (Leakage) | 1.0 μA max at 33 V - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss. |
| TJ max | 150 °C - Maximum junction temperature rating; supports operation in under-hood automotive and high-ambient industrial environments. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient; informs PCB copper pad design (0.2" × 0.2") for sustained power dissipation. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, with matte tin-plated leads solderable per J-STD-002. Bidirectional construction means no cathode/anode marking; terminals are symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically in bidirectional mode; connects across protected line and ground or between differential lines. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - required for engine control, ADAS, and body electronics. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surge tests when properly mounted on 5.0 mm × 5.0 mm copper pads. |
| Low clamping ratio (VC/VBR ≈ 1.25) | Minimizes overvoltage stress on protected ICs - e.g., 45.7 V clamp vs. 36.7 V breakdown ensures tight voltage margin. |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; compatible with high-volume automated assembly lines. |
| Glass passivated junction | Provides stable, repeatable breakdown voltage and long-term parameter stability under thermal and electrical stress. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential signal pair or supply-to-ground to clamp transients before they reach sensitive analog front-ends. Use Value: Maintains signal fidelity during 100 V/50 ms load dump events while limiting clamped voltage to ≤45.7 V - within absolute maximum ratings of 5 V or 3.3 V interface ICs. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring induced surges and inductive kickback. IC Role / Device Role / Timing Role: Parallel-connected TVS on each input channel to shunt surge energy to common ground before reaching optocoupler or Schmitt trigger inputs. Use Value: Enables compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) immunity standards without derating system MTBF. |
| Telecom Line Interface | Consumer Power Adapter Output |
Use Scenario: Protecting Ethernet PHYs and PoE injectors from lightning-induced surges on RJ45 ports in network switches and base stations. IC Role / Device Role / Timing Role: Bidirectional TVS deployed on each twisted pair (e.g., MDI/MDIX) to suppress common-mode transients up to ±1 kV. Use Value: Clamps transients within 1 ns while maintaining <1 pF junction capacitance - avoids signal integrity degradation at 100 Mbps+ data rates. |
Use Scenario: Secondary-side overvoltage suppression on 5 V/9 V/12 V USB-C and barrel-jack outputs of wall adapters and chargers. IC Role / Device Role / Timing Role: Final-stage TVS placed between output rail and ground to absorb residual switching spikes and external ESD events. Use Value: Prevents false triggering or latch-up in connected devices (e.g., smartphones, IoT hubs) during plug/unplug or cable discharge events. |
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 33 V VWM, but lower PPPM (400 W); SMA package (smaller footprint, higher RθJA = 140 °C/W). | Limited to lower-energy transients; less suitable for IEC 61000-4-5 Level 4 or automotive load dump. | Select when board space is constrained and surge energy is ≤400 W - verify thermal margin with reduced copper area. |
| SMCJ33CA | Same 33 V VWM, higher PPPM (1500 W); larger SMC (DO-214AB) package with lower RθJA (50 °C/W). | Better suited for high-reliability industrial mains input stages or motor drive feedback circuits. | Choose when higher surge margin or improved thermal performance is required - requires larger PCB real estate. |
Compared with SMAJ33CA and SMCJ33CA, the P6SMB33CAHM3_B/I delivers balanced surge capability (600 W), AEC-Q101 qualification, and SMB footprint - making it optimal for space-constrained automotive and industrial edge nodes where qualification and standardized mounting are mandatory.
Availability
P6SMB33CAHM3_B/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter designs requiring stable component supply, AEC-Q101 traceability, and consistent SMB package form factor.
Supply support for P6SMB33CAHM3_B/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, efficiency, and application-specific optimization.
The P6SMB Series targets high-reliability transient suppression in automotive, industrial, and telecom infrastructure - engineered for robustness under repetitive surge stress and qualified to AEC-Q101 for under-hood deployment.
FAQ
What is the clamping voltage of P6SMB33CAHM3_B/I at its rated peak pulse current?
The P6SMB33CAHM3_B/I 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 under standardized test conditions per JEDEC and ensures predictable overvoltage limiting for downstream ICs. The P6SMB33CAHM3_B/I maintains this clamping performance across its full operating temperature range (−65 °C to +150 °C), supporting design margin verification in harsh environments.
Is P6SMB33CAHM3_B/I suitable for automotive applications?
Yes, P6SMB33CAHM3_B/I is AEC-Q101 qualified (indicated by the "HM3_B" suffix), meaning it has passed stress tests including high-temperature reverse bias, temperature cycling, and surge endurance specific to automotive electronics. It is commonly deployed in engine control units, body control modules, and ADAS sensor interfaces where reliability under load dump and ISO 7637-2 pulses is mandatory. The P6SMB33CAHM3_B/I meets these requirements without derating at 125 °C ambient.
How does the bidirectional configuration of P6SMB33CAHM3_B/I affect its circuit placement?
The bidirectional configuration of P6SMB33CAHM3_B/I eliminates polarity concerns - it can be placed across any two nodes requiring symmetrical overvoltage protection, such as differential signal lines (e.g., RS-485, CAN), AC power rails, or supply-to-ground in AC-coupled systems. Unlike unidirectional TVS diodes, the P6SMB33CAHM3_B/I has no cathode marking and functions identically regardless of voltage polarity, simplifying layout and reducing BOM variants.
What is the thermal resistance of P6SMB33CAHM3_B/I, and how does it impact PCB layout?
The P6SMB33CAHM3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 PCB with no internal planes. To maintain safe junction temperatures during repetitive surges, designers must allocate adequate copper area and avoid excessive trace length. The P6SMB33CAHM3_B/I's RθJA directly determines allowable duty cycle in pulsed applications - exceeding thermal limits risks parametric shift or failure.
Does P6SMB33CAHM3_B/I meet RoHS and halogen-free requirements?
Yes, the "HM3" suffix in P6SMB33CAHM3_B/I explicitly denotes halogen-free, RoHS-compliant construction per Vishay's material categorization standard (www.vishay.com/doc?99912). This includes brominated flame retardants replacement and lead-free matte tin plating on terminals, fully compliant with EU Directive 2011/65/EU and JEDEC JS709. The P6SMB33CAHM3_B/I is suitable for export-controlled and green-electronics programs requiring full substance declaration.
P6SMB33CAHM3_B/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:
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB33CAHM3_B/I FAQ
1.How can I place an order for P6SMB33CAHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB33CAHM3_B/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 P6SMB33CAHM3_B/I reliable?
The price and inventory of P6SMB33CAHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB33CAHM3_B/I is usually 5 days.
3.What payment methods are accepted for P6SMB33CAHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB33CAHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB33CAHM3_B/I?
P6SMB33CAHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB33CAHM3_B/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 P6SMB33CAHM3_B/I?
For technical support, including P6SMB33CAHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB33CAHM3_B/I requirements.
6.How does Aetrix verify that P6SMB33CAHM3_B/I is sourced from the original manufacturer or authorized distributors?
All P6SMB33CAHM3_B/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 P6SMB33CAHM3_B/I meets industry standards.
7.What is the process for return or replacement of P6SMB33CAHM3_B/I?
All P6SMB33CAHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB33CAHM3_B/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 P6SMB33CAHM3_B/I part is unused and in its original packaging.
Return procedure for P6SMB33CAHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB33CAHM3_B/I Tags
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