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Vishay General Semiconductor - Diodes Division P6SMB33CAHE3_B/I
- Part No.:
- P6SMB33CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB33CAHE3_B/I.pdf
- Description:
- 600W,33V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,041
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Product details
Overview
P6SMB33CAHE3_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), 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. It is AEC-Q101 qualified and RoHS-compliant, targeting automotive and industrial electronics protection.
For engineers reviewing the P6SMB33CAHE3_B/I datasheet, P6SMB33CAHE3_B/I pinout, P6SMB33CAHE3_B/I application, or P6SMB33CAHE3_B/I equivalent, this device is selected for robust ESD and surge immunity in bidirectional signal paths-especially where low-profile SMB packaging, fast response time (<1 ns), and stable clamping under repetitive transients are required.
Technical Context
The P6SMB33CAHE3_B/I operates as a bidirectional avalanche diode, symmetrically clamping voltage surges in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance, enabling consistent clamping across temperature (−65 °C to +150 °C).
It delivers 600 W peak pulse power per 10/1000 μs waveform at TA = 25 °C, derated linearly above 25 °C with RθJA = 100 °C/W. The device meets J-STD-020 MSL Level 1 and supports reflow up to 260 °C peak, making it suitable for high-reliability automated SMT assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 28.2 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 31.4–34.7 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 45.7 V at IPPM = 13.1 A - Peak voltage seen by protected circuit during 600 W transient; critical for IC-level stress limits. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 μs waveform; validates immunity to IEC 61000-4-5 Level 4 surges. |
| Package | SMB (DO-214AA) - Low-profile surface-mount package (4.57 mm × 3.94 mm × 2.20 mm); compatible with standard 0.2" × 0.2" copper pad layout. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
| RoHS & Halogen-Free Status | Rohs-compliant (HE3 suffix); not halogen-free - base P/NHE3 denotes RoHS compliance without halogen-free claim. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are symmetrical; device functions identically in either orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Terminal 1) | Input/Output node (bidirectional) | One end of the symmetrical avalanche junction; connects to line under protection (e.g., CAN_H or RS-485 A). |
| Anode (Terminal 2) | Input/Output node (bidirectional) | Second terminal of the same junction; connects to complementary line (e.g., CAN_L or RS-485 B) or ground reference. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables single-device protection against IEC 61000-4-5 surge test Level 4 (4 kV line-to-ground) without cascading devices. |
| Fast response time (<1 ns) | Clamps transients before sensitive downstream logic or analog circuitry sustains damage. |
| Low clamping ratio (VC/VWM ≈ 1.62) | Minimizes overvoltage stress on protected ICs while maintaining margin above normal operating voltage. |
| MSL Level 1, 260 °C reflow compatible | Supports lead-free reflow without preconditioning; eliminates moisture-related popcorning risk in production. |
| AEC-Q101 qualification (HE3 variant) | Validates suitability for automotive infotainment, body control, and ADAS sensor interfaces requiring long-term field reliability. |
Applications
| Automotive CAN Bus Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting CAN_H/CAN_L differential pair in vehicle ECUs against load dump and ESD events per ISO 16750-2 and ISO 10605. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential lines to clamp common-mode surges while preserving signal integrity. Use Value: Maintains CAN communication uptime by limiting voltage excursions to ≤45.7 V during 13.1 A transients-well below transceiver absolute max ratings. |
Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs exposed to motor switching noise and lightning-induced surges. IC Role / Device Role / Timing Role: Line-to-line TVS suppressing differential-mode transients on A/B bus lines without affecting DC bias or data eye. Use Value: Enables reliable 10 Mbps operation under repeated 600 W surges due to low dynamic impedance and sub-nanosecond response. |
| Consumer USB Port ESD Protection | Telecom DSL Line Surge Suppression |
Use Scenario: Adding secondary-level ESD protection on USB 2.0 D+/D− lines in set-top boxes and smart displays. IC Role / Device Role / Timing Role: Bidirectional clamping device placed after primary ESD array to handle higher-energy events missed by polymer-based protectors. Use Value: Survives ±15 kV contact discharge (IEC 61000-4-2) without degradation, verified by AEC-Q101 accelerated life testing. |
Use Scenario: Front-end surge suppression on DSL line cards interfacing with outside plant wiring subject to induced lightning surges. IC Role / Device Role / Timing Role: Primary line-to-ground protector on tip/ring pairs, absorbing energy before reaching transformer and PHY IC. Use Value: Withstands 10/1000 μs surges up to 13.1 A while holding clamped voltage below 45.7 V-preserving xDSL chipset reliability. |
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-E3/5B | Same SMB package, 33 V VWM, but 400 W PPPM (vs. 600 W); lower clamping voltage (44.0 V) at 11.4 A. | Lower energy handling; suited for less severe surge environments (e.g., consumer USB vs. automotive CAN). | Select when cost sensitivity outweighs need for full IEC 61000-4-5 Level 4 margin. |
| SMCJ33CAHE3_A/H | Higher-power SMC package (1500 W PPPM), same 33 V VWM, larger footprint (7.11 mm × 6.22 mm), identical AEC-Q101/HE3 qualification. | Used where board space allows and higher surge immunity (e.g., power supply inputs) is required beyond signal line needs. | Choose for front-end AC/DC or DC/DC input protection where 600 W is insufficient. |
Compared with SMAJ33CA-E3/5B, P6SMB33CAHE3_B/I offers 50% higher surge power rating and tighter thermal design margin via lower RθJA; versus SMCJ33CAHE3_A/H, it trades 2.5× footprint reduction for 60% lower peak power-ideal for space-constrained signal line protection.
Availability
P6SMB33CAHE3_B/I is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial RS-485 networks, and telecom DSL line cards requiring stable component supply with AEC-Q101 assurance and long-lifecycle support.
Supply support for P6SMB33CAHE3_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 is engineered for high-energy transient suppression in automotive, industrial, and communications infrastructure-delivering consistent clamping performance in compact SMB packages with AEC-Q101 validation.
FAQ
What is the maximum clamping voltage of the P6SMB33CAHE3_B/I under rated surge conditions?
The P6SMB33CAHE3_B/I 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 guaranteed per Vishay's datasheet (Document Number: 88370, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuitry during worst-case transients. The P6SMB33CAHE3_B/I maintains this clamping performance across its full operating temperature range (−65 °C to +150 °C).
Is the P6SMB33CAHE3_B/I suitable for automotive applications?
Yes, the P6SMB33CAHE3_B/I is AEC-Q101 qualified, as indicated by the "HE3" and "_B" suffixes in its part number. It undergoes rigorous stress testing-including temperature cycling, high-temperature reverse bias (HTRB), and ESD-to meet automotive reliability requirements. The P6SMB33CAHE3_B/I is commonly deployed in CAN, LIN, and sensor interface protection within engine control units, body electronics, and ADAS modules.
What does the "CA" suffix mean in P6SMB33CAHE3_B/I?
The "CA" suffix in P6SMB33CAHE3_B/I denotes a bidirectional configuration: the device provides symmetrical transient suppression for both positive and negative voltage excursions, with no cathode band marking. Unlike unidirectional variants (e.g., P6SMB33A), the P6SMB33CAHE3_B/I is used across differential signal lines (e.g., RS-485 A/B or CAN_H/L) or where polarity reversal must be tolerated without redesign.
What is the thermal resistance of the P6SMB33CAHE3_B/I, and how does it affect PCB layout?
The P6SMB33CAHE3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under sustained power dissipation, PCB layout must adhere to this pad size and avoid excessive trace length or isolation. The P6SMB33CAHE3_B/I's RθJA directly impacts derating above 25 °C-e.g., at 85 °C ambient, its peak pulse power must be reduced to ~360 W per Vishay's Fig. 2 derating curve.
How does the P6SMB33CAHE3_B/I compare to unidirectional TVS diodes like P6SMB33AHE3_B/I?
The P6SMB33CAHE3_B/I differs from P6SMB33AHE3_B/I solely in polarity: "CA" indicates bidirectional operation (no polarity marking, symmetrical clamping), while "A" indicates unidirectional (cathode-banded, clamps only reverse polarity). Both share identical VWM (28.2 V), VBR (31.4–34.7 V), VC (45.7 V), and PPPM (600 W). The P6SMB33CAHE3_B/I is selected for differential or AC-coupled lines; P6SMB33AHE3_B/I suits DC power rail or single-ended signal protection where polarity is fixed.
P6SMB33CAHE3_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)
P6SMB33CAHE3_B/I FAQ
1.How can I place an order for P6SMB33CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB33CAHE3_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 P6SMB33CAHE3_B/I reliable?
The price and inventory of P6SMB33CAHE3_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 P6SMB33CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for P6SMB33CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB33CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB33CAHE3_B/I?
P6SMB33CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB33CAHE3_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 P6SMB33CAHE3_B/I?
For technical support, including P6SMB33CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB33CAHE3_B/I requirements.
6.How does Aetrix verify that P6SMB33CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All P6SMB33CAHE3_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 P6SMB33CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of P6SMB33CAHE3_B/I?
All P6SMB33CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB33CAHE3_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 P6SMB33CAHE3_B/I part is unused and in its original packaging.
Return procedure for P6SMB33CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB33CAHE3_B/I Tags
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